CTAN sync 202112290301

3 files changed, 3 insertions, 3 deletions

diff --git a/graphics/asymptote/base/v3dheadertypes.asy b/graphics/asymptote/base/v3dheadertypes.asy
index 765d678080..cc78dfd4f4 100644
--- a/graphics/asymptote/base/v3dheadertypes.asy
+++ b/graphics/asymptote/base/v3dheadertypes.asy
@@ -1,6 +1,6 @@
 // Enum class for v3dheadertypes
 // AUTO-GENERATED from v3dheadertypes.csv
-// Generated at 2021-12-27 12:46:04.747922
+// Generated at 2021-12-27 17:52:27.156438
 
 struct v3dheadertypes
 {
diff --git a/graphics/asymptote/base/v3dtypes.asy b/graphics/asymptote/base/v3dtypes.asy
index b5f19cd5cd..270e28faeb 100644
--- a/graphics/asymptote/base/v3dtypes.asy
+++ b/graphics/asymptote/base/v3dtypes.asy
@@ -1,6 +1,6 @@
 // Enum class for v3dtypes
 // AUTO-GENERATED from v3dtypes.csv
-// Generated at 2021-12-27 12:46:04.684643
+// Generated at 2021-12-27 17:52:27.075241
 
 struct v3dtypes
 {
diff --git a/graphics/asymptote/base/webgl/asygl.js b/graphics/asymptote/base/webgl/asygl.js
index 8e02dcfbda..3f8cc84a38 100644
--- a/graphics/asymptote/base/webgl/asygl.js
+++ b/graphics/asymptote/base/webgl/asygl.js
@@ -36,4 +36,4 @@ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.*/
-let vertex="\n#ifdef WEBGL2\n#define IN in\n#define OUT out\n#else\n#define IN attribute\n#define OUT varying\n#endif\n\nIN vec3 position;\n#ifdef WIDTH\nIN float width;\n#endif\n#ifdef NORMAL\nIN vec3 normal;\n#endif\n\nIN float materialIndex;\n\n#ifdef WEBGL2\nflat out int MaterialIndex;\n#ifdef COLOR\nOUT vec4 Color;\n#endif\n\n#else\nOUT vec4 diffuse;\nOUT vec3 specular;\nOUT float roughness,metallic,fresnel0;\nOUT vec4 emissive;\n\nstruct Material {\n  vec4 diffuse,emissive,specular;\n  vec4 parameters;\n};\n\nuniform Material Materials[Nmaterials];\n#endif\n\n#ifdef COLOR\nIN vec4 color;\n#endif\n\nuniform mat3 normMat;\nuniform mat4 viewMat;\nuniform mat4 projViewMat;\n\n#ifdef NORMAL\n#ifndef ORTHOGRAPHIC\nOUT vec3 ViewPosition;\n#endif\nOUT vec3 Normal;\n#endif\n\nvoid main(void)\n{\n  vec4 v=vec4(position,1.0);\n  gl_Position=projViewMat*v;\n\n#ifdef NORMAL\n#ifndef ORTHOGRAPHIC\n  ViewPosition=(viewMat*v).xyz;\n#endif\n  Normal=normalize(normal*normMat);\n#endif\n\n#ifdef WEBGL2\n  MaterialIndex=int(materialIndex);\n#ifdef COLOR\n  Color=color;\n#endif\n#else\n#ifdef NORMAL\n  Material m;\n#ifdef TRANSPARENT\n  m=Materials[int(abs(materialIndex))-1];\n  emissive=m.emissive;\n  if(materialIndex >= 0.0)\n    diffuse=m.diffuse;\n  else {\n    diffuse=color;\n#if nlights == 0\n    emissive += color;\n#endif\n  }\n#else\n  m=Materials[int(materialIndex)];\n  emissive=m.emissive;\n#ifdef COLOR\n  diffuse=color;\n#if nlights == 0\n    emissive += color;\n#endif\n#else\n  diffuse=m.diffuse;\n#endif // COLOR\n#endif // TRANSPARENT\n  specular=m.specular.rgb;\n  vec4 parameters=m.parameters;\n  roughness=1.0-parameters[0];\n  metallic=parameters[1];\n  fresnel0=parameters[2];\n#else\n  emissive=Materials[int(materialIndex)].emissive;\n#endif // NORMAL\n#endif // WEBGL2\n\n#ifdef WIDTH\n  gl_PointSize=width;\n#endif\n}\n",fragment="\n#ifdef WEBGL2\n#define IN in\nout vec4 outValue;\n#define OUTVALUE outValue\n#else\n#define IN varying\n#define OUTVALUE gl_FragColor\n#endif\n\n#ifdef WEBGL2\nflat in int MaterialIndex;\n\nstruct Material {\n  vec4 diffuse,emissive,specular;\n  vec4 parameters;\n};\n\nuniform Material Materials[Nmaterials];\n\nvec4 diffuse;\nvec3 specular;\nfloat roughness,metallic,fresnel0;\nvec4 emissive;\n\n#ifdef COLOR\nin vec4 Color;\n#endif\n\n#else\nIN vec4 diffuse;\nIN vec3 specular;\nIN float roughness,metallic,fresnel0;\nIN vec4 emissive;\n#endif\n\n#ifdef NORMAL\n\n#ifndef ORTHOGRAPHIC\nIN vec3 ViewPosition;\n#endif\nIN vec3 Normal;\n\nvec3 normal;\n\nstruct Light {\n  vec3 direction;\n  vec3 color;\n};\n\nuniform Light Lights[Nlights];\n\n#ifdef USE_IBL\nuniform sampler2D reflBRDFSampler;\nuniform sampler2D diffuseSampler;\nuniform sampler2D reflImgSampler;\n\nconst float pi=acos(-1.0);\nconst float piInv=1.0/pi;\nconst float twopi=2.0*pi;\nconst float twopiInv=1.0/twopi;\n\n// (x,y,z) -> (r,theta,phi);\n// theta -> [0,pi]: colatitude\n// phi -> [-pi,pi]: longitude\nvec3 cart2sphere(vec3 cart)\n{\n  float x=cart.x;\n  float y=cart.z;\n  float z=cart.y;\n\n  float r=length(cart);\n  float theta=r > 0.0 ? acos(z/r) : 0.0;\n  float phi=atan(y,x);\n\n  return vec3(r,theta,phi);\n}\n\nvec2 normalizedAngle(vec3 cartVec)\n{\n  vec3 sphericalVec=cart2sphere(cartVec);\n  sphericalVec.y=sphericalVec.y*piInv;\n  sphericalVec.z=0.75-sphericalVec.z*twopiInv;\n  return sphericalVec.zy;\n}\n\nvec3 IBLColor(vec3 viewDir)\n{\n  vec3 IBLDiffuse=diffuse.rgb*texture(diffuseSampler,normalizedAngle(normal)).rgb;\n  vec3 reflectVec=normalize(reflect(-viewDir,normal));\n  vec2 reflCoord=normalizedAngle(reflectVec);\n  vec3 IBLRefl=textureLod(reflImgSampler,reflCoord,roughness*ROUGHNESS_STEP_COUNT).rgb;\n  vec2 IBLbrdf=texture(reflBRDFSampler,vec2(dot(normal,viewDir),roughness)).rg;\n  float specularMultiplier=fresnel0*IBLbrdf.x+IBLbrdf.y;\n  vec3 dielectric=IBLDiffuse+specularMultiplier*IBLRefl;\n  vec3 metal=diffuse.rgb*IBLRefl;\n  return mix(dielectric,metal,metallic);\n}\n#else\nfloat Roughness2;\nfloat NDF_TRG(vec3 h)\n{\n  float ndoth=max(dot(normal,h),0.0);\n  float alpha2=Roughness2*Roughness2;\n  float denom=ndoth*ndoth*(alpha2-1.0)+1.0;\n  return denom != 0.0 ? alpha2/(denom*denom) : 0.0;\n}\n\nfloat GGX_Geom(vec3 v)\n{\n  float ndotv=max(dot(v,normal),0.0);\n  float ap=1.0+Roughness2;\n  float k=0.125*ap*ap;\n  return ndotv/((ndotv*(1.0-k))+k);\n}\n\nfloat Geom(vec3 v, vec3 l)\n{\n  return GGX_Geom(v)*GGX_Geom(l);\n}\n\nfloat Fresnel(vec3 h, vec3 v, float fresnel0)\n{\n  float a=1.0-max(dot(h,v),0.0);\n  float b=a*a;\n  return fresnel0+(1.0-fresnel0)*b*b*a;\n}\n\n// physical based shading using UE4 model.\nvec3 BRDF(vec3 viewDirection, vec3 lightDirection)\n{\n  vec3 lambertian=diffuse.rgb;\n  vec3 h=normalize(lightDirection+viewDirection);\n\n  float omegain=max(dot(viewDirection,normal),0.0);\n  float omegaln=max(dot(lightDirection,normal),0.0);\n\n  float D=NDF_TRG(h);\n  float G=Geom(viewDirection,lightDirection);\n  float F=Fresnel(h,viewDirection,fresnel0);\n\n  float denom=4.0*omegain*omegaln;\n  float rawReflectance=denom > 0.0 ? (D*G)/denom : 0.0;\n\n  vec3 dielectric=mix(lambertian,rawReflectance*specular,F);\n  vec3 metal=rawReflectance*diffuse.rgb;\n\n  return mix(dielectric,metal,metallic);\n}\n#endif\n\n#endif\n\nvoid main(void)\n{\n#ifdef WEBGL2\n#ifdef NORMAL\n  Material m;\n#ifdef TRANSPARENT\n  m=Materials[abs(MaterialIndex)-1];\n  emissive=m.emissive;\n  if(MaterialIndex >= 0)\n    diffuse=m.diffuse;\n  else {\n    diffuse=Color;\n#if nlights == 0\n    emissive += Color;\n#endif\n  }\n#else\n  m=Materials[MaterialIndex];\n  emissive=m.emissive;\n#ifdef COLOR\n  diffuse=Color;\n#if nlights == 0\n    emissive += Color;\n#endif\n#else\n  diffuse=m.diffuse;\n#endif // COLOR\n#endif // TRANSPARENT\n  specular=m.specular.rgb;\n  vec4 parameters=m.parameters;\n  roughness=1.0-parameters[0];\n  metallic=parameters[1];\n  fresnel0=parameters[2];\n#else\n  emissive=Materials[MaterialIndex].emissive;\n#endif // NORMAL\n#endif // WEBGL2\n\n#if defined(NORMAL) && nlights > 0\n  normal=normalize(Normal);\n  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a=t[0],n=t[1],r=t[2],s=t[3],o=t[4],l=t[5],h=t[6],c=t[7],d=t[8],m=t[9],f=t[10],u=t[11],p=t[12],g=t[13],v=t[14],x=t[15],w=i[0],M=i[1],b=i[2],T=i[3];return e[0]=w*a+M*o+b*d+T*p,e[1]=w*n+M*l+b*m+T*g,e[2]=w*r+M*h+b*f+T*v,e[3]=w*s+M*c+b*u+T*x,w=i[4],M=i[5],b=i[6],T=i[7],e[4]=w*a+M*o+b*d+T*p,e[5]=w*n+M*l+b*m+T*g,e[6]=w*r+M*h+b*f+T*v,e[7]=w*s+M*c+b*u+T*x,w=i[8],M=i[9],b=i[10],T=i[11],e[8]=w*a+M*o+b*d+T*p,e[9]=w*n+M*l+b*m+T*g,e[10]=w*r+M*h+b*f+T*v,e[11]=w*s+M*c+b*u+T*x,w=i[12],M=i[13],b=i[14],T=i[15],e[12]=w*a+M*o+b*d+T*p,e[13]=w*n+M*l+b*m+T*g,e[14]=w*r+M*h+b*f+T*v,e[15]=w*s+M*c+b*u+T*x,e}}])}));let canvasWidth,canvasHeight,imageURL,image,minBound,maxBound,orthographic,angleOfView,initialZoom,viewportMargin,zoomFactor,zoomPinchFactor,zoomPinchCap,zoomStep,shiftHoldDistance,shiftWaitTime,vibrateTime,canvasWidth0,canvasHeight0,zoom0,embedded,canvas,gl,alpha,offscreen2,context,maxMaterials,halfCanvasWidth,halfCanvasHeight,P=[],Materials=[],Lights=[],Centers=[],Background=[1,1,1,1],absolute=!1,ibl=!1,viewportShift=[0,0],webgl2=!1,nlights=0,Nmaterials=2,materials=[];const pixelResolution=.75,zoomRemeshFactor=1.5,FillFactor=.1,windowTrim=10,third=1/3;let Zoom,lastZoom,maxViewportWidth,maxViewportHeight,H,zmin,zmax,size2,ArcballFactor,rotMat=mat4.create(),projMat=mat4.create(),viewMat=mat4.create(),projViewMat=mat4.create(),normMat=mat3.create(),viewMat3=mat3.create(),cjMatInv=mat4.create(),T=mat4.create(),center={x:0,y:0,z:0},shift={x:0,y:0},viewParam={xmin:0,xmax:0,ymin:0,ymax:0,zmin:0,zmax:0},remesh=!0,wireframe=0,mouseDownOrTouchActive=!1,lastMouseX=null,lastMouseY=null,touchID=null,Positions=[],Normals=[],Colors=[],Indices=[],IBLReflMap=null,IBLDiffuseMap=null,IBLbdrfMap=null;function IBLReady(){return null!==IBLReflMap&&null!==IBLDiffuseMap&&null!==IBLbdrfMap}function SetIBL(){embedded||deleteShaders(),initShaders(ibl)}let roughnessStepCount=8;class Material{constructor(e,t,i,a,n,r){this.diffuse=e,this.emissive=t,this.specular=i,this.shininess=a,this.metallic=n,this.fresnel0=r}setUniform(e,t){let i=i=>gl.getUniformLocation(e,"Materials["+t+"]."+i);gl.uniform4fv(i("diffuse"),new Float32Array(this.diffuse)),gl.uniform4fv(i("emissive"),new Float32Array(this.emissive)),gl.uniform4fv(i("specular"),new Float32Array(this.specular)),gl.uniform4f(i("parameters"),this.shininess,this.metallic,this.fresnel0,0)}}let indexExt,TRIANGLES,material0Data,material1Data,materialData,colorData,transparentData,triangleData,materialIndex,enumPointLight=1,enumDirectionalLight=2;class Light{constructor(e,t){this.direction=e,this.color=t}setUniform(e,t){let i=i=>gl.getUniformLocation(e,"Lights["+t+"]."+i);gl.uniform3fv(i("direction"),new Float32Array(this.direction)),gl.uniform3fv(i("color"),new Float32Array(this.color))}}function initShaders(e=!1){let t=gl.getParameter(gl.MAX_VERTEX_UNIFORM_VECTORS);maxMaterials=Math.floor((t-14)/4),Nmaterials=Math.min(Math.max(Nmaterials,Materials.length),maxMaterials),pixelOpt=["WIDTH"],materialOpt=["NORMAL"],colorOpt=["NORMAL","COLOR"],transparentOpt=["NORMAL","COLOR","TRANSPARENT"],e&&(materialOpt.push("USE_IBL"),transparentOpt.push("USE_IBL")),pixelShader=initShader(pixelOpt),materialShader=initShader(materialOpt),colorShader=initShader(colorOpt),transparentShader=initShader(transparentOpt)}function deleteShaders(){gl.deleteProgram(transparentShader),gl.deleteProgram(colorShader),gl.deleteProgram(materialShader),gl.deleteProgram(pixelShader)}function saveAttributes(){let e=window.top.document.asygl2[alpha];e.gl=gl,e.nlights=Lights.length,e.Nmaterials=Nmaterials,e.maxMaterials=maxMaterials,e.pixelShader=pixelShader,e.materialShader=materialShader,e.colorShader=colorShader,e.transparentShader=transparentShader}function restoreAttributes(){let e=window.top.document.asygl2[alpha];gl=e.gl,nlights=e.nlights,Nmaterials=e.Nmaterials,maxMaterials=e.maxMaterials,pixelShader=e.pixelShader,materialShader=e.materialShader,colorShader=e.colorShader,transparentShader=e.transparentShader}function webGL(e,t){let i;return ibl&&(webgl2=!0),webgl2&&(i=e.getContext("webgl2",{alpha:t})),i||(webgl2=!1,ibl=!1,i=e.getContext("webgl",{alpha:t})),i||alert("Could not initialize WebGL"),i}function initGL(){if(alpha=Background[3]<1,embedded){let e=window.top.document;null==e.asygl2&&(e.asygl2=Array(2)),context=canvas.getContext("2d"),offscreen2=e.offscreen2,offscreen2||(offscreen2=e.createElement("canvas"),e.offscreen2=offscreen2),e.asygl2[alpha]&&e.asygl2[alpha].gl?(restoreAttributes(),(Lights.length!=nlights||Math.min(Materials.length,maxMaterials)>Nmaterials)&&(initShaders(),saveAttributes())):(gl=webGL(offscreen2,alpha),initShaders(),e.asygl2[alpha]={},saveAttributes())}else gl=webGL(canvas,alpha),initShaders();indexExt=gl.getExtension("OES_element_index_uint"),TRIANGLES=gl.TRIANGLES,material0Data=new vertexBuffer(gl.POINTS),material1Data=new vertexBuffer(gl.LINES),materialData=new vertexBuffer,colorData=new vertexBuffer,transparentData=new vertexBuffer,triangleData=new vertexBuffer}function getShader(e,t,i,a=[]){let n=webgl2?"300 es":"100",r=Array(...a),s=[["nlights",0==wireframe?Lights.length:0],["Nmaterials",Nmaterials]],o=[["int","Nlights",Math.max(Lights.length,1)]];webgl2&&r.push("WEBGL2"),ibl&&s.push(["ROUGHNESS_STEP_COUNT",roughnessStepCount.toFixed(2)]),orthographic&&r.push("ORTHOGRAPHIC"),macros_str=s.map(e=>`#define ${e[0]} ${e[1]}`).join("\n"),define_str=r.map(e=>"#define "+e).join("\n"),const_str=o.map(e=>`const ${e[0]} ${e[1]}=${e[2]};`).join("\n"),ext_str=[].map(e=>`#extension ${e}: enable`).join("\n"),shaderSrc=`#version ${n}\n${ext_str}\n${define_str}\n${const_str}\n${macros_str}\n\n\n#ifdef GL_FRAGMENT_PRECISION_HIGH\nprecision highp float;\n#else\nprecision mediump float;\n#endif\n  \n${t}\n  `;let l=e.createShader(i);return e.shaderSource(l,shaderSrc),e.compileShader(l),e.getShaderParameter(l,e.COMPILE_STATUS)?l:(alert(e.getShaderInfoLog(l)),null)}function registerBuffer(e,t,i,a=gl.ARRAY_BUFFER){return e.length>0&&(0==t&&(t=gl.createBuffer(),i=!0),gl.bindBuffer(a,t),i&&gl.bufferData(a,e,gl.STATIC_DRAW)),t}function drawBuffer(e,t,i=e.indices){if(0==e.indices.length)return;let a=t!=pixelShader;setUniforms(e,t),null!=IBLDiffuseMap&&(gl.activeTexture(gl.TEXTURE0),gl.bindTexture(gl.TEXTURE_2D,IBLbdrfMap),gl.uniform1i(gl.getUniformLocation(t,"reflBRDFSampler"),0),gl.activeTexture(gl.TEXTURE1),gl.bindTexture(gl.TEXTURE_2D,IBLDiffuseMap),gl.uniform1i(gl.getUniformLocation(t,"diffuseSampler"),1),gl.activeTexture(gl.TEXTURE2),gl.bindTexture(gl.TEXTURE_2D,IBLReflMap),gl.uniform1i(gl.getUniformLocation(t,"reflImgSampler"),2));let n=remesh||e.partial||!e.rendered;e.verticesBuffer=registerBuffer(new Float32Array(e.vertices),e.verticesBuffer,n),gl.vertexAttribPointer(positionAttribute,3,gl.FLOAT,!1,a?24:16,0),a?Lights.length>0&&gl.vertexAttribPointer(normalAttribute,3,gl.FLOAT,!1,24,12):gl.vertexAttribPointer(widthAttribute,1,gl.FLOAT,!1,16,12),e.materialsBuffer=registerBuffer(new Int16Array(e.materialIndices),e.materialsBuffer,n),gl.vertexAttribPointer(materialAttribute,1,gl.SHORT,!1,2,0),t!=colorShader&&t!=transparentShader||(e.colorsBuffer=registerBuffer(new Uint8Array(e.colors),e.colorsBuffer,n),gl.vertexAttribPointer(colorAttribute,4,gl.UNSIGNED_BYTE,!0,0,0)),e.indicesBuffer=registerBuffer(indexExt?new Uint32Array(i):new Uint16Array(i),e.indicesBuffer,n,gl.ELEMENT_ARRAY_BUFFER),e.rendered=!0,gl.drawElements(a?wireframe?gl.LINES:e.type:gl.POINTS,i.length,indexExt?gl.UNSIGNED_INT:gl.UNSIGNED_SHORT,0)}class vertexBuffer{constructor(e){this.type=e||TRIANGLES,this.verticesBuffer=0,this.materialsBuffer=0,this.colorsBuffer=0,this.indicesBuffer=0,this.rendered=!1,this.partial=!1,this.clear()}clear(){this.vertices=[],this.materialIndices=[],this.colors=[],this.indices=[],this.nvertices=0,this.materials=[],this.materialTable=[]}vertex(e,t){return this.vertices.push(e[0]),this.vertices.push(e[1]),this.vertices.push(e[2]),this.vertices.push(t[0]),this.vertices.push(t[1]),this.vertices.push(t[2]),this.materialIndices.push(materialIndex),this.nvertices++}Vertex(e,t,i=[0,0,0,0]){return this.vertices.push(e[0]),this.vertices.push(e[1]),this.vertices.push(e[2]),this.vertices.push(t[0]),this.vertices.push(t[1]),this.vertices.push(t[2]),this.materialIndices.push(materialIndex),this.colors.push(i[0]),this.colors.push(i[1]),this.colors.push(i[2]),this.colors.push(i[3]),this.nvertices++}vertex0(e,t){return this.vertices.push(e[0]),this.vertices.push(e[1]),this.vertices.push(e[2]),this.vertices.push(t),this.materialIndices.push(materialIndex),this.nvertices++}iVertex(e,t,i,a=[0,0,0,0]){let n=6*e;this.vertices[n]=t[0],this.vertices[n+1]=t[1],this.vertices[n+2]=t[2],this.vertices[n+3]=i[0],this.vertices[n+4]=i[1],this.vertices[n+5]=i[2],this.materialIndices[e]=materialIndex;let r=4*e;this.colors[r]=a[0],this.colors[r+1]=a[1],this.colors[r+2]=a[2],this.colors[r+3]=a[3],this.indices.push(e)}append(e){append(this.vertices,e.vertices),append(this.materialIndices,e.materialIndices),append(this.colors,e.colors),appendOffset(this.indices,e.indices,this.nvertices),this.nvertices+=e.nvertices}}function append(e,t){let i=e.length,a=t.length;e.length+=a;for(let n=0;n<a;++n)e[i+n]=t[n]}function appendOffset(e,t,i){let a=e.length,n=t.length;e.length+=t.length;for(let r=0;r<n;++r)e[a+r]=t[r]+i}class Geometry{constructor(){this.data=new vertexBuffer,this.Onscreen=!1,this.m=[]}offscreen(e){let t=projViewMat,i=e[0],a=i[0],n=i[1],r=i[2],s=1/(t[3]*a+t[7]*n+t[11]*r+t[15]);this.x=this.X=(t[0]*a+t[4]*n+t[8]*r+t[12])*s,this.y=this.Y=(t[1]*a+t[5]*n+t[9]*r+t[13])*s;for(let i=1,a=e.length;i<a;++i){let a=e[i],n=a[0],r=a[1],s=a[2],o=1/(t[3]*n+t[7]*r+t[11]*s+t[15]),l=(t[0]*n+t[4]*r+t[8]*s+t[12])*o,h=(t[1]*n+t[5]*r+t[9]*s+t[13])*o;l<this.x?this.x=l:l>this.X&&(this.X=l),h<this.y?this.y=h:h>this.Y&&(this.Y=h)}return(this.X<-1.01||this.x>1.01||this.Y<-1.01||this.y>1.01)&&(this.Onscreen=!1,!0)}T(e){let t=this.c[0],i=this.c[1],a=this.c[2],n=e[0]-t,r=e[1]-i,s=e[2]-a;return[n*normMat[0]+r*normMat[3]+s*normMat[6]+t,n*normMat[1]+r*normMat[4]+s*normMat[7]+i,n*normMat[2]+r*normMat[5]+s*normMat[8]+a]}Tcorners(e,t){return[this.T(e),this.T([e[0],e[1],t[2]]),this.T([e[0],t[1],e[2]]),this.T([e[0],t[1],t[2]]),this.T([t[0],e[1],e[2]]),this.T([t[0],e[1],t[2]]),this.T([t[0],t[1],e[2]]),this.T(t)]}setMaterial(e,t){null==e.materialTable[this.MaterialIndex]&&(e.materials.length>=Nmaterials&&(e.partial=!0,t()),e.materialTable[this.MaterialIndex]=e.materials.length,e.materials.push(Materials[this.MaterialIndex])),materialIndex=e.materialTable[this.MaterialIndex]}render(){let e;if(this.setMaterialIndex(),0==this.CenterIndex?e=corners(this.Min,this.Max):(this.c=Centers[this.CenterIndex-1],e=this.Tcorners(this.Min,this.Max)),this.offscreen(e))return this.data.clear(),void this.notRendered();let t,i=this.controlpoints;if(0==this.CenterIndex){if(!remesh&&this.Onscreen)return void this.append();t=i}else{let e=i.length;t=Array(e);for(let a=0;a<e;++a)t[a]=this.T(i[a])}let a=orthographic?1:this.Min[2]/maxBound[2],n=.75*Math.hypot(a*(viewParam.xmax-viewParam.xmin),a*(viewParam.ymax-viewParam.ymin))/size2;this.res2=n*n,this.Epsilon=.1*n,this.data.clear(),this.notRendered(),this.Onscreen=!0,this.process(t)}}class BezierPatch extends Geometry{constructor(e,t,i,a,n,r){super(),this.controlpoints=e,this.CenterIndex=t,this.MaterialIndex=i,this.Min=a,this.Max=n,this.color=r;let s=e.length;if(r){let e=r[0][3]+r[1][3]+r[2][3];this.transparent=16==s||4==s?e+r[3][3]<1020:e<765}else this.transparent=Materials[i].diffuse[3]<1;this.vertex=this.transparent?this.data.Vertex.bind(this.data):this.data.vertex.bind(this.data),this.L2norm(this.controlpoints)}setMaterialIndex(){this.transparent?this.setMaterial(transparentData,drawTransparent):this.color?this.setMaterial(colorData,drawColor):this.setMaterial(materialData,drawMaterial)}L2norm(e){let t=e[0];this.epsilon=0;let i=e.length;for(let a=1;a<i;++a)this.epsilon=Math.max(this.epsilon,abs2([e[a][0]-t[0],e[a][1]-t[1],e[a][2]-t[2]]));this.epsilon*=Number.EPSILON}processTriangle(e){let t=e[0],i=e[1],a=e[2],n=unit(cross([i[0]-t[0],i[1]-t[1],i[2]-t[2]],[a[0]-t[0],a[1]-t[1],a[2]-t[2]]));if(!this.offscreen([t,i,a])){let e,r,s;this.color?(e=this.data.Vertex(t,n,this.color[0]),r=this.data.Vertex(i,n,this.color[1]),s=this.data.Vertex(a,n,this.color[2])):(e=this.vertex(t,n),r=this.vertex(i,n),s=this.vertex(a,n)),0==wireframe?(this.data.indices.push(e),this.data.indices.push(r),this.data.indices.push(s)):(this.data.indices.push(e),this.data.indices.push(r),this.data.indices.push(r),this.data.indices.push(s),this.data.indices.push(s),this.data.indices.push(e)),this.append()}}processQuad(e){let t=e[0],i=e[1],a=e[2],n=e[3],r=cross([i[0]-t[0],i[1]-t[1],i[2]-t[2]],[a[0]-i[0],a[1]-i[1],a[2]-i[2]]),s=cross([a[0]-n[0],a[1]-n[1],a[2]-n[2]],[n[0]-t[0],n[1]-t[1],n[2]-t[2]]),o=unit([r[0]+s[0],r[1]+s[1],r[2]+s[2]]);if(!this.offscreen([t,i,a,n])){let e,r,s,l;this.color?(e=this.data.Vertex(t,o,this.color[0]),r=this.data.Vertex(i,o,this.color[1]),s=this.data.Vertex(a,o,this.color[2]),l=this.data.Vertex(n,o,this.color[3])):(e=this.vertex(t,o),r=this.vertex(i,o),s=this.vertex(a,o),l=this.vertex(n,o)),0==wireframe?(this.data.indices.push(e),this.data.indices.push(r),this.data.indices.push(s),this.data.indices.push(e),this.data.indices.push(s),this.data.indices.push(l)):(this.data.indices.push(e),this.data.indices.push(r),this.data.indices.push(r),this.data.indices.push(s),this.data.indices.push(s),this.data.indices.push(l),this.data.indices.push(l),this.data.indices.push(e)),this.append()}}curve(e,t,i,a,n){new BezierCurve([e[t],e[i],e[a],e[n]],0,materialIndex,this.Min,this.Max).render()}process(e){if(this.transparent&&1!=wireframe&&(materialIndex=this.color?-1-materialIndex:1+materialIndex),10==e.length)return this.process3(e);if(3==e.length)return this.processTriangle(e);if(4==e.length)return this.processQuad(e);if(1==wireframe)return this.curve(e,0,4,8,12),this.curve(e,12,13,14,15),this.curve(e,15,11,7,3),void this.curve(e,3,2,1,0);let t=e[0],i=e[3],a=e[12],n=e[15],r=this.normal(i,e[2],e[1],t,e[4],e[8],a);abs2(r)<this.epsilon&&(r=this.normal(i,e[2],e[1],t,e[13],e[14],n),abs2(r)<this.epsilon&&(r=this.normal(n,e[11],e[7],i,e[4],e[8],a)));let s=this.normal(t,e[4],e[8],a,e[13],e[14],n);abs2(s)<this.epsilon&&(s=this.normal(t,e[4],e[8],a,e[11],e[7],i),abs2(s)<this.epsilon&&(s=this.normal(i,e[2],e[1],t,e[13],e[14],n)));let o=this.normal(a,e[13],e[14],n,e[11],e[7],i);abs2(o)<this.epsilon&&(o=this.normal(a,e[13],e[14],n,e[2],e[1],t),abs2(o)<this.epsilon&&(o=this.normal(t,e[4],e[8],a,e[11],e[7],i)));let l=this.normal(n,e[11],e[7],i,e[2],e[1],t);if(abs2(l)<this.epsilon&&(l=this.normal(n,e[11],e[7],i,e[4],e[8],a),abs2(l)<this.epsilon&&(l=this.normal(a,e[13],e[14],n,e[2],e[1],t))),this.color){let h=this.color[0],c=this.color[1],d=this.color[2],m=this.color[3],f=this.data.Vertex(t,r,h),u=this.data.Vertex(a,s,c),p=this.data.Vertex(n,o,d),g=this.data.Vertex(i,l,m);this.Render(e,f,u,p,g,t,a,n,i,!1,!1,!1,!1,h,c,d,m)}else{let h=this.vertex(t,r),c=this.vertex(a,s),d=this.vertex(n,o),m=this.vertex(i,l);this.Render(e,h,c,d,m,t,a,n,i,!1,!1,!1,!1)}this.data.indices.length>0&&this.append()}append(){this.transparent?transparentData.append(this.data):this.color?colorData.append(this.data):materialData.append(this.data)}notRendered(){this.transparent?transparentData.rendered=!1:this.color?colorData.rendered=!1:materialData.rendered=!1}Render(e,t,i,a,n,r,s,o,l,h,c,d,m,f,u,p,g){let v=this.Distance(e);if(v[0]<this.res2&&v[1]<this.res2)this.offscreen([r,s,o])||(0==wireframe?(this.data.indices.push(t),this.data.indices.push(i),this.data.indices.push(a)):(this.data.indices.push(t),this.data.indices.push(i),this.data.indices.push(i),this.data.indices.push(a))),this.offscreen([r,o,l])||(0==wireframe?(this.data.indices.push(t),this.data.indices.push(a),this.data.indices.push(n)):(this.data.indices.push(a),this.data.indices.push(n),this.data.indices.push(n),this.data.indices.push(t)));else{if(this.offscreen(e))return;let x=e[0],w=e[3],M=e[12],b=e[15];if(v[0]<this.res2){let v=new Split3(x,e[1],e[2],w),T=new Split3(e[4],e[5],e[6],e[7]),S=new Split3(e[8],e[9],e[10],e[11]),R=new Split3(M,e[13],e[14],b),I=[x,v.m0,v.m3,v.m5,e[4],T.m0,T.m3,T.m5,e[8],S.m0,S.m3,S.m5,M,R.m0,R.m3,R.m5],A=[v.m5,v.m4,v.m2,w,T.m5,T.m4,T.m2,e[7],S.m5,S.m4,S.m2,e[11],R.m5,R.m4,R.m2,b],E=this.normal(I[12],I[13],I[14],I[15],I[11],I[7],I[3]);abs2(E)<=this.epsilon&&(E=this.normal(I[12],I[13],I[14],I[15],I[2],I[1],I[0]),abs2(E)<=this.epsilon&&(E=this.normal(I[0],I[4],I[8],I[12],I[11],I[7],I[3])));let P=this.normal(A[3],A[2],A[1],A[0],A[4],A[8],A[12]);abs2(P)<=this.epsilon&&(P=this.normal(A[3],A[2],A[1],A[0],A[13],A[14],A[15]),abs2(P)<=this.epsilon&&(P=this.normal(A[15],A[11],A[7],A[3],A[4],A[8],A[12])));let L=this.Epsilon,D=[.5*(s[0]+o[0]),.5*(s[1]+o[1]),.5*(s[2]+o[2])];if(!c)if(c=Straightness(M,e[13],e[14],b)<this.res2){let e=unit(this.differential(A[12],A[8],A[4],A[0]));D=[D[0]-L*e[0],D[1]-L*e[1],D[2]-L*e[2]]}else D=I[15];let y=[.5*(l[0]+r[0]),.5*(l[1]+r[1]),.5*(l[2]+r[2])];if(!m)if(m=Straightness(x,e[1],e[2],w)<this.res2){let e=unit(this.differential(I[3],I[7],I[11],I[15]));y=[y[0]-L*e[0],y[1]-L*e[1],y[2]-L*e[2]]}else y=A[0];if(f){let e=Array(4),v=Array(4);for(let t=0;t<4;++t)e[t]=.5*(u[t]+p[t]),v[t]=.5*(g[t]+f[t]);let x=this.data.Vertex(D,E,e),w=this.data.Vertex(y,P,v);this.Render(I,t,i,x,w,r,s,D,y,h,c,!1,m,f,u,e,v),this.Render(A,w,x,a,n,y,D,o,l,!1,c,d,m,v,e,p,g)}else{let e=this.vertex(D,E),f=this.vertex(y,P);this.Render(I,t,i,e,f,r,s,D,y,h,c,!1,m),this.Render(A,f,e,a,n,y,D,o,l,!1,c,d,m)}return}if(v[1]<this.res2){let v=new Split3(x,e[4],e[8],M),T=new Split3(e[1],e[5],e[9],e[13]),S=new Split3(e[2],e[6],e[10],e[14]),R=new Split3(w,e[7],e[11],b),I=[x,e[1],e[2],w,v.m0,T.m0,S.m0,R.m0,v.m3,T.m3,S.m3,R.m3,v.m5,T.m5,S.m5,R.m5],A=[v.m5,T.m5,S.m5,R.m5,v.m4,T.m4,S.m4,R.m4,v.m2,T.m2,S.m2,R.m2,M,e[13],e[14],b],E=this.normal(I[0],I[4],I[8],I[12],I[13],I[14],I[15]);abs2(E)<=this.epsilon&&(E=this.normal(I[0],I[4],I[8],I[12],I[11],I[7],I[3]),abs2(E)<=this.epsilon&&(E=this.normal(I[3],I[2],I[1],I[0],I[13],I[14],I[15])));let P=this.normal(A[15],A[11],A[7],A[3],A[2],A[1],A[0]);abs2(P)<=this.epsilon&&(P=this.normal(A[15],A[11],A[7],A[3],A[4],A[8],A[12]),abs2(P)<=this.epsilon&&(P=this.normal(A[12],A[13],A[14],A[15],A[2],A[1],A[0])));let L=this.Epsilon,D=[.5*(r[0]+s[0]),.5*(r[1]+s[1]),.5*(r[2]+s[2])];if(!h)if(h=Straightness(x,e[4],e[8],M)<this.res2){let e=unit(this.differential(A[0],A[1],A[2],A[3]));D=[D[0]-L*e[0],D[1]-L*e[1],D[2]-L*e[2]]}else D=I[12];let y=[.5*(o[0]+l[0]),.5*(o[1]+l[1]),.5*(o[2]+l[2])];if(!d)if(d=Straightness(b,e[11],e[7],w)<this.res2){let e=unit(this.differential(I[15],I[14],I[13],I[12]));y=[y[0]-L*e[0],y[1]-L*e[1],y[2]-L*e[2]]}else y=A[3];if(f){let e=Array(4),v=Array(4);for(let t=0;t<4;++t)e[t]=.5*(f[t]+u[t]),v[t]=.5*(p[t]+g[t]);let x=this.data.Vertex(D,E,e),w=this.data.Vertex(y,P,v);this.Render(I,t,x,w,n,r,D,y,l,h,!1,d,m,f,e,v,g),this.Render(A,x,i,a,w,D,s,o,y,h,c,d,!1,e,u,p,v)}else{let e=this.vertex(D,E),f=this.vertex(y,P);this.Render(I,t,e,f,n,r,D,y,l,h,!1,d,m),this.Render(A,e,i,a,f,D,s,o,y,h,c,d,!1)}return}let T=new Split3(x,e[1],e[2],w),S=new Split3(e[4],e[5],e[6],e[7]),R=new Split3(e[8],e[9],e[10],e[11]),I=new Split3(M,e[13],e[14],b),A=new Split3(x,e[4],e[8],M),E=new Split3(T.m0,S.m0,R.m0,I.m0),P=new Split3(T.m3,S.m3,R.m3,I.m3),L=new Split3(T.m5,S.m5,R.m5,I.m5),D=new Split3(T.m4,S.m4,R.m4,I.m4),y=new Split3(T.m2,S.m2,R.m2,I.m2),O=new Split3(w,e[7],e[11],b),B=[x,T.m0,T.m3,T.m5,A.m0,E.m0,P.m0,L.m0,A.m3,E.m3,P.m3,L.m3,A.m5,E.m5,P.m5,L.m5],N=[A.m5,E.m5,P.m5,L.m5,A.m4,E.m4,P.m4,L.m4,A.m2,E.m2,P.m2,L.m2,M,I.m0,I.m3,I.m5],z=[L.m5,D.m5,y.m5,O.m5,L.m4,D.m4,y.m4,O.m4,L.m2,D.m2,y.m2,O.m2,I.m5,I.m4,I.m2,b],_=[T.m5,T.m4,T.m2,w,L.m0,D.m0,y.m0,O.m0,L.m3,D.m3,y.m3,O.m3,L.m5,D.m5,y.m5,O.m5],C=B[15],V=this.normal(B[0],B[4],B[8],B[12],B[13],B[14],B[15]);abs2(V)<this.epsilon&&(V=this.normal(B[0],B[4],B[8],B[12],B[11],B[7],B[3]),abs2(V)<this.epsilon&&(V=this.normal(B[3],B[2],B[1],B[0],B[13],B[14],B[15])));let U=this.normal(N[12],N[13],N[14],N[15],N[11],N[7],N[3]);abs2(U)<this.epsilon&&(U=this.normal(N[12],N[13],N[14],N[15],N[2],N[1],N[0]),abs2(U)<this.epsilon&&(U=this.normal(N[0],N[4],N[8],N[12],N[11],N[7],N[3])));let H=this.normal(z[15],z[11],z[7],z[3],z[2],z[1],z[0]);abs2(H)<this.epsilon&&(H=this.normal(z[15],z[11],z[7],z[3],z[4],z[8],z[12]),abs2(H)<this.epsilon&&(H=this.normal(z[12],z[13],z[14],z[15],z[2],z[1],z[0])));let F=this.normal(_[3],_[2],_[1],_[0],_[4],_[8],_[12]);abs2(F)<this.epsilon&&(F=this.normal(_[3],_[2],_[1],_[0],_[13],_[14],_[15]),abs2(F)<this.epsilon&&(F=this.normal(_[15],_[11],_[7],_[3],_[4],_[8],_[12])));let G=this.normal(z[3],z[2],z[1],C,z[4],z[8],z[12]),X=this.Epsilon,W=[.5*(r[0]+s[0]),.5*(r[1]+s[1]),.5*(r[2]+s[2])];if(!h)if(h=Straightness(x,e[4],e[8],M)<this.res2){let e=unit(this.differential(N[0],N[1],N[2],N[3]));W=[W[0]-X*e[0],W[1]-X*e[1],W[2]-X*e[2]]}else W=B[12];let j=[.5*(s[0]+o[0]),.5*(s[1]+o[1]),.5*(s[2]+o[2])];if(!c)if(c=Straightness(M,e[13],e[14],b)<this.res2){let e=unit(this.differential(z[12],z[8],z[4],z[0]));j=[j[0]-X*e[0],j[1]-X*e[1],j[2]-X*e[2]]}else j=N[15];let Z=[.5*(o[0]+l[0]),.5*(o[1]+l[1]),.5*(o[2]+l[2])];if(!d)if(d=Straightness(b,e[11],e[7],w)<this.res2){let e=unit(this.differential(_[15],_[14],_[13],_[12]));Z=[Z[0]-X*e[0],Z[1]-X*e[1],Z[2]-X*e[2]]}else Z=z[3];let k=[.5*(l[0]+r[0]),.5*(l[1]+r[1]),.5*(l[2]+r[2])];if(!m)if(m=Straightness(x,e[1],e[2],w)<this.res2){let e=unit(this.differential(B[3],B[7],B[11],B[15]));k=[k[0]-X*e[0],k[1]-X*e[1],k[2]-X*e[2]]}else k=_[0];if(f){let e=Array(4),v=Array(4),x=Array(4),w=Array(4),M=Array(4);for(let t=0;t<4;++t)e[t]=.5*(f[t]+u[t]),v[t]=.5*(u[t]+p[t]),x[t]=.5*(p[t]+g[t]),w[t]=.5*(g[t]+f[t]),M[t]=.5*(e[t]+x[t]);let b=this.data.Vertex(W,V,e),T=this.data.Vertex(j,U,v),S=this.data.Vertex(Z,H,x),R=this.data.Vertex(k,F,w),I=this.data.Vertex(C,G,M);this.Render(B,t,b,I,R,r,W,C,k,h,!1,!1,m,f,e,M,w),this.Render(N,b,i,T,I,W,s,j,C,h,c,!1,!1,e,u,v,M),this.Render(z,I,T,a,S,C,j,o,Z,!1,c,d,!1,M,v,p,x),this.Render(_,R,I,S,n,k,C,Z,l,!1,!1,d,m,w,M,x,g)}else{let e=this.vertex(W,V),f=this.vertex(j,U),u=this.vertex(Z,H),p=this.vertex(k,F),g=this.vertex(C,G);this.Render(B,t,e,g,p,r,W,C,k,h,!1,!1,m),this.Render(N,e,i,f,g,W,s,j,C,h,c,!1,!1),this.Render(z,g,f,a,u,C,j,o,Z,!1,c,d,!1),this.Render(_,p,g,u,n,k,C,Z,l,!1,!1,d,m)}}}process3(e){if(1==wireframe)return this.curve(e,0,1,3,6),this.curve(e,6,7,8,9),void this.curve(e,9,5,2,0);let t=e[0],i=e[6],a=e[9],n=this.normal(a,e[5],e[2],t,e[1],e[3],i),r=this.normal(t,e[1],e[3],i,e[7],e[8],a),s=this.normal(i,e[7],e[8],a,e[5],e[2],t);if(this.color){let o=this.color[0],l=this.color[1],h=this.color[2],c=this.data.Vertex(t,n,o),d=this.data.Vertex(i,r,l),m=this.data.Vertex(a,s,h);this.Render3(e,c,d,m,t,i,a,!1,!1,!1,o,l,h)}else{let o=this.vertex(t,n),l=this.vertex(i,r),h=this.vertex(a,s);this.Render3(e,o,l,h,t,i,a,!1,!1,!1)}this.data.indices.length>0&&this.append()}Render3(e,t,i,a,n,r,s,o,l,h,c,d,m){if(this.Distance3(e)<this.res2)this.offscreen([n,r,s])||(0==wireframe?(this.data.indices.push(t),this.data.indices.push(i),this.data.indices.push(a)):(this.data.indices.push(t),this.data.indices.push(i),this.data.indices.push(i),this.data.indices.push(a),this.data.indices.push(a),this.data.indices.push(t)));else{if(this.offscreen(e))return;let f=e[0],u=e[1],p=e[2],g=e[3],v=e[4],x=e[5],w=e[6],M=e[7],b=e[8],T=e[9],S=[.5*(T[0]+x[0]),.5*(T[1]+x[1]),.5*(T[2]+x[2])],R=[.5*(T[0]+b[0]),.5*(T[1]+b[1]),.5*(T[2]+b[2])],I=[.5*(x[0]+p[0]),.5*(x[1]+p[1]),.5*(x[2]+p[2])],A=[.5*(b[0]+v[0]),.5*(b[1]+v[1]),.5*(b[2]+v[2])],E=[.5*(b[0]+M[0]),.5*(b[1]+M[1]),.5*(b[2]+M[2])],P=[.5*(p[0]+v[0]),.5*(p[1]+v[1]),.5*(p[2]+v[2])],L=[.5*(p[0]+f[0]),.5*(p[1]+f[1]),.5*(p[2]+f[2])],D=[.5*(v[0]+g[0]),.5*(v[1]+g[1]),.5*(v[2]+g[2])],y=[.5*(M[0]+w[0]),.5*(M[1]+w[1]),.5*(M[2]+w[2])],O=[.5*(f[0]+u[0]),.5*(f[1]+u[1]),.5*(f[2]+u[2])],B=[.5*(u[0]+g[0]),.5*(u[1]+g[1]),.5*(u[2]+g[2])],N=[.5*(g[0]+w[0]),.5*(g[1]+w[1]),.5*(g[2]+w[2])],z=[.5*(S[0]+I[0]),.5*(S[1]+I[1]),.5*(S[2]+I[2])],_=[.5*(R[0]+E[0]),.5*(R[1]+E[1]),.5*(R[2]+E[2])],C=[.5*(I[0]+L[0]),.5*(I[1]+L[1]),.5*(I[2]+L[2])],V=[.5*A[0]+.25*(v[0]+u[0]),.5*A[1]+.25*(v[1]+u[1]),.5*A[2]+.25*(v[2]+u[2])],U=[.5*(E[0]+y[0]),.5*(E[1]+y[1]),.5*(E[2]+y[2])],H=[.5*P[0]+.25*(v[0]+M[0]),.5*P[1]+.25*(v[1]+M[1]),.5*P[2]+.25*(v[2]+M[2])],F=[.25*(x[0]+v[0])+.5*D[0],.25*(x[1]+v[1])+.5*D[1],.25*(x[2]+v[2])+.5*D[2]],G=[.5*(O[0]+B[0]),.5*(O[1]+B[1]),.5*(O[2]+B[2])],X=[.5*(B[0]+N[0]),.5*(B[1]+N[1]),.5*(B[2]+N[2])],W=[.5*(H[0]+G[0]),.5*(H[1]+G[1]),.5*(H[2]+G[2])],j=[.5*(H[0]+X[0]),.5*(H[1]+X[1]),.5*(H[2]+X[2])],Z=[.5*(G[0]+X[0]),.5*(G[1]+X[1]),.5*(G[2]+X[2])],k=[.5*(F[0]+U[0]),.5*(F[1]+U[1]),.5*(F[2]+U[2])],Y=[.5*(_[0]+F[0]),.5*(_[1]+F[1]),.5*(_[2]+F[2])],q=[.5*(_[0]+U[0]),.5*(_[1]+U[1]),.5*(_[2]+U[2])],$=[.5*(z[0]+V[0]),.5*(z[1]+V[1]),.5*(z[2]+V[2])],K=[.5*(C[0]+V[0]),.5*(C[1]+V[1]),.5*(C[2]+V[2])],Q=[.5*(z[0]+C[0]),.5*(z[1]+C[1]),.5*(z[2]+C[2])],J=[f,O,L,G,[.5*(P[0]+O[0]),.5*(P[1]+O[1]),.5*(P[2]+O[2])],C,Z,W,K,Q],ee=[Z,X,j,N,[.5*(D[0]+y[0]),.5*(D[1]+y[1]),.5*(D[2]+y[2])],k,w,y,U,q],te=[Q,$,z,Y,[.5*(S[0]+A[0]),.5*(S[1]+A[1]),.5*(S[2]+A[2])],S,q,_,R,T],ie=[q,Y,k,$,[.25*(I[0]+E[0]+B[0]+v[0]),.25*(I[1]+E[1]+B[1]+v[1]),.25*(I[2]+E[2]+B[2]+v[2])],j,Q,K,W,Z],ae=this.normal(Z,j,k,q,Y,$,Q),ne=this.normal(q,Y,$,Q,K,W,Z),re=this.normal(Q,K,W,Z,j,k,q),se=this.Epsilon,oe=[.5*(r[0]+s[0]),.5*(r[1]+s[1]),.5*(r[2]+s[2])];if(!o)if(o=Straightness(w,M,b,T)<this.res2){let e=unit(this.sumdifferential(ie[0],ie[2],ie[5],ie[9],ie[1],ie[3],ie[6]));oe=[oe[0]-se*e[0],oe[1]-se*e[1],oe[2]-se*e[2]]}else oe=q;let le=[.5*(s[0]+n[0]),.5*(s[1]+n[1]),.5*(s[2]+n[2])];if(!l)if(l=Straightness(f,p,x,T)<this.res2){let e=unit(this.sumdifferential(ie[6],ie[3],ie[1],ie[0],ie[7],ie[8],ie[9]));le=[le[0]-se*e[0],le[1]-se*e[1],le[2]-se*e[2]]}else le=Q;let he=[.5*(n[0]+r[0]),.5*(n[1]+r[1]),.5*(n[2]+r[2])];if(!h)if(h=Straightness(f,u,g,w)<this.res2){let e=unit(this.sumdifferential(ie[9],ie[8],ie[7],ie[6],ie[5],ie[2],ie[0]));he=[he[0]-se*e[0],he[1]-se*e[1],he[2]-se*e[2]]}else he=Z;if(c){let e=Array(4),f=Array(4),u=Array(4);for(let t=0;t<4;++t)e[t]=.5*(d[t]+m[t]),f[t]=.5*(m[t]+c[t]),u[t]=.5*(c[t]+d[t]);let p=this.data.Vertex(oe,ae,e),g=this.data.Vertex(le,ne,f),v=this.data.Vertex(he,re,u);this.Render3(J,t,v,g,n,he,le,!1,l,h,c,u,f),this.Render3(ee,v,i,p,he,r,oe,o,!1,h,u,d,e),this.Render3(te,g,p,a,le,oe,s,o,l,!1,f,e,m),this.Render3(ie,p,g,v,oe,le,he,!1,!1,!1,e,f,u)}else{let e=this.vertex(oe,ae),c=this.vertex(le,ne),d=this.vertex(he,re);this.Render3(J,t,d,c,n,he,le,!1,l,h),this.Render3(ee,d,i,e,he,r,oe,o,!1,h),this.Render3(te,c,e,a,le,oe,s,o,l,!1),this.Render3(ie,e,c,d,oe,le,he,!1,!1,!1)}}}Distance(e){let t=e[0],i=e[3],a=e[12],n=e[15],r=Flatness(t,a,i,n);r=Math.max(Straightness(t,e[4],e[8],a)),r=Math.max(r,Straightness(e[1],e[5],e[9],e[13])),r=Math.max(r,Straightness(i,e[7],e[11],n)),r=Math.max(r,Straightness(e[2],e[6],e[10],e[14]));let s=Flatness(t,i,a,n);return s=Math.max(s,Straightness(t,e[1],e[2],i)),s=Math.max(s,Straightness(e[4],e[5],e[6],e[7])),s=Math.max(s,Straightness(e[8],e[9],e[10],e[11])),s=Math.max(s,Straightness(a,e[13],e[14],n)),[r,s]}Distance3(e){let t=e[0],i=e[4],a=e[6],n=e[9],r=abs2([(t[0]+a[0]+n[0])*(1/3)-i[0],(t[1]+a[1]+n[1])*(1/3)-i[1],(t[2]+a[2]+n[2])*(1/3)-i[2]]);return r=Math.max(r,Straightness(t,e[1],e[3],a)),r=Math.max(r,Straightness(t,e[2],e[5],n)),Math.max(r,Straightness(a,e[7],e[8],n))}differential(e,t,i,a){let n=[3*(t[0]-e[0]),3*(t[1]-e[1]),3*(t[2]-e[2])];return abs2(n)>this.epsilon?n:(n=bezierPP(e,t,i),abs2(n)>this.epsilon?n:bezierPPP(e,t,i,a))}sumdifferential(e,t,i,a,n,r,s){let o=this.differential(e,t,i,a),l=this.differential(e,n,r,s);return[o[0]+l[0],o[1]+l[1],o[2]+l[2]]}normal(e,t,i,a,n,r,s){let o=3*(n[0]-a[0]),l=3*(n[1]-a[1]),h=3*(n[2]-a[2]),c=3*(i[0]-a[0]),d=3*(i[1]-a[1]),m=3*(i[2]-a[2]),f=[l*m-h*d,h*c-o*m,o*d-l*c];if(abs2(f)>this.epsilon)return f;let u=[c,d,m],p=[o,l,h],g=bezierPP(a,i,t),v=bezierPP(a,n,r),x=cross(v,u),w=cross(p,g);if(f=[x[0]+w[0],x[1]+w[1],x[2]+w[2]],abs2(f)>this.epsilon)return f;let M=bezierPPP(a,i,t,e),b=bezierPPP(a,n,r,s);x=cross(p,M),w=cross(b,u);let T=cross(v,g);return f=[x[0]+w[0]+T[0],x[1]+w[1]+T[1],x[2]+w[2]+T[2]],abs2(f)>this.epsilon?f:(x=cross(b,g),w=cross(v,M),f=[x[0]+w[0],x[1]+w[1],x[2]+w[2]],abs2(f)>this.epsilon?f:cross(b,M))}}class BezierCurve extends Geometry{constructor(e,t,i,a,n){super(),this.controlpoints=e,this.CenterIndex=t,this.MaterialIndex=i,this.Min=a,this.Max=n}setMaterialIndex(){this.setMaterial(material1Data,drawMaterial1)}processLine(e){let t=e[0],i=e[1];if(!this.offscreen([t,i])){let e=[0,0,1];this.data.indices.push(this.data.vertex(t,e)),this.data.indices.push(this.data.vertex(i,e)),this.append()}}process(e){if(2==e.length)return this.processLine(e);let t=e[0],i=e[1],a=e[2],n=e[3],r=this.normal(bezierP(t,i),bezierPP(t,i,a)),s=this.normal(bezierP(a,n),bezierPP(n,a,i)),o=this.data.vertex(t,r),l=this.data.vertex(n,s);this.Render(e,o,l),this.data.indices.length>0&&this.append()}append(){material1Data.append(this.data)}notRendered(){material1Data.rendered=!1}Render(e,t,i){let a=e[0],n=e[1],r=e[2],s=e[3];if(Straightness(a,n,r,s)<this.res2)this.offscreen([a,s])||(this.data.indices.push(t),this.data.indices.push(i));else{if(this.offscreen(e))return;let o=[.5*(a[0]+n[0]),.5*(a[1]+n[1]),.5*(a[2]+n[2])],l=[.5*(n[0]+r[0]),.5*(n[1]+r[1]),.5*(n[2]+r[2])],h=[.5*(r[0]+s[0]),.5*(r[1]+s[1]),.5*(r[2]+s[2])],c=[.5*(o[0]+l[0]),.5*(o[1]+l[1]),.5*(o[2]+l[2])],d=[.5*(l[0]+h[0]),.5*(l[1]+h[1]),.5*(l[2]+h[2])],m=[.5*(c[0]+d[0]),.5*(c[1]+d[1]),.5*(c[2]+d[2])],f=[a,o,c,m],u=[m,d,h,s],p=this.normal(bezierPh(a,n,r,s),bezierPPh(a,n,r,s)),g=this.data.vertex(m,p);this.Render(f,t,g),this.Render(u,g,i)}}normal(e,t){let i=dot(e,e),a=dot(e,t);return[i*t[0]-a*e[0],i*t[1]-a*e[1],i*t[2]-a*e[2]]}}class Pixel extends Geometry{constructor(e,t,i,a,n){super(),this.controlpoint=e,this.width=t,this.CenterIndex=0,this.MaterialIndex=i,this.Min=a,this.Max=n}setMaterialIndex(){this.setMaterial(material0Data,drawMaterial0)}process(e){this.data.indices.push(this.data.vertex0(this.controlpoint,this.width)),this.append()}append(){material0Data.append(this.data)}notRendered(){material0Data.rendered=!1}}class Triangles extends Geometry{constructor(e,t,i,a){super(),this.CenterIndex=e,this.MaterialIndex=t,this.Min=i,this.Max=a,this.controlpoints=Positions,this.Normals=Normals,this.Colors=Colors,this.Indices=Indices,Positions=[],Normals=[],Colors=[],Indices=[],this.transparent=Materials[this.MaterialIndex].diffuse[3]<1}setMaterialIndex(){this.transparent?this.setMaterial(transparentData,drawTransparent):this.setMaterial(triangleData,drawTriangle)}process(e){this.data.vertices=new Array(6*e.length),materialIndex=this.Colors.length>0?-1-materialIndex:1+materialIndex;for(let t=0,i=this.Indices.length;t<i;++t){let i=this.Indices[t],a=i[0],n=e[a[0]],r=e[a[1]],s=e[a[2]];if(!this.offscreen([n,r,s])){let e=i.length>1?i[1]:a;if(e&&0!=e.length||(e=a),this.Colors.length>0){let t=i.length>2?i[2]:a;t&&0!=t.length||(t=a);let o=this.Colors[t[0]],l=this.Colors[t[1]],h=this.Colors[t[2]];this.transparent|=o[3]+l[3]+h[3]<765,0==wireframe?(this.data.iVertex(a[0],n,this.Normals[e[0]],o),this.data.iVertex(a[1],r,this.Normals[e[1]],l),this.data.iVertex(a[2],s,this.Normals[e[2]],h)):(this.data.iVertex(a[0],n,this.Normals[e[0]],o),this.data.iVertex(a[1],r,this.Normals[e[1]],l),this.data.iVertex(a[1],r,this.Normals[e[1]],l),this.data.iVertex(a[2],s,this.Normals[e[2]],h),this.data.iVertex(a[2],s,this.Normals[e[2]],h),this.data.iVertex(a[0],n,this.Normals[e[0]],o))}else 0==wireframe?(this.data.iVertex(a[0],n,this.Normals[e[0]]),this.data.iVertex(a[1],r,this.Normals[e[1]]),this.data.iVertex(a[2],s,this.Normals[e[2]])):(this.data.iVertex(a[0],n,this.Normals[e[0]]),this.data.iVertex(a[1],r,this.Normals[e[1]]),this.data.iVertex(a[1],r,this.Normals[e[1]]),this.data.iVertex(a[2],s,this.Normals[e[2]]),this.data.iVertex(a[2],s,this.Normals[e[2]]),this.data.iVertex(a[0],n,this.Normals[e[0]]))}}this.data.nvertices=e.length,this.data.indices.length>0&&this.append()}append(){this.transparent?transparentData.append(this.data):triangleData.append(this.data)}notRendered(){this.transparent?transparentData.rendered=!1:triangleData.rendered=!1}}function redrawScene(){initProjection(),setProjection(),remesh=!0,drawScene()}function home(){mat4.identity(rotMat),redrawScene()}let positionAttribute=0,normalAttribute=1,materialAttribute=2,colorAttribute=3,widthAttribute=4;function initShader(e=[]){let t=getShader(gl,vertex,gl.VERTEX_SHADER,e),i=getShader(gl,fragment,gl.FRAGMENT_SHADER,e),a=gl.createProgram();return gl.attachShader(a,t),gl.attachShader(a,i),gl.bindAttribLocation(a,positionAttribute,"position"),gl.bindAttribLocation(a,normalAttribute,"normal"),gl.bindAttribLocation(a,materialAttribute,"materialIndex"),gl.bindAttribLocation(a,colorAttribute,"color"),gl.bindAttribLocation(a,widthAttribute,"width"),gl.linkProgram(a),gl.getProgramParameter(a,gl.LINK_STATUS)||alert("Could not initialize shaders"),a}class Split3{constructor(e,t,i,a){this.m0=[.5*(e[0]+t[0]),.5*(e[1]+t[1]),.5*(e[2]+t[2])];let n=.5*(t[0]+i[0]),r=.5*(t[1]+i[1]),s=.5*(t[2]+i[2]);this.m2=[.5*(i[0]+a[0]),.5*(i[1]+a[1]),.5*(i[2]+a[2])],this.m3=[.5*(this.m0[0]+n),.5*(this.m0[1]+r),.5*(this.m0[2]+s)],this.m4=[.5*(n+this.m2[0]),.5*(r+this.m2[1]),.5*(s+this.m2[2])],this.m5=[.5*(this.m3[0]+this.m4[0]),.5*(this.m3[1]+this.m4[1]),.5*(this.m3[2]+this.m4[2])]}}function unit(e){let t=1/(Math.sqrt(e[0]*e[0]+e[1]*e[1]+e[2]*e[2])||1);return[e[0]*t,e[1]*t,e[2]*t]}function abs2(e){return e[0]*e[0]+e[1]*e[1]+e[2]*e[2]}function dot(e,t){return e[0]*t[0]+e[1]*t[1]+e[2]*t[2]}function cross(e,t){return[e[1]*t[2]-e[2]*t[1],e[2]*t[0]-e[0]*t[2],e[0]*t[1]-e[1]*t[0]]}function bezierP(e,t){return[t[0]-e[0],t[1]-e[1],t[2]-e[2]]}function bezierPP(e,t,i){return[3*(e[0]+i[0])-6*t[0],3*(e[1]+i[1])-6*t[1],3*(e[2]+i[2])-6*t[2]]}function bezierPPP(e,t,i,a){return[a[0]-e[0]+3*(t[0]-i[0]),a[1]-e[1]+3*(t[1]-i[1]),a[2]-e[2]+3*(t[2]-i[2])]}function bezierPh(e,t,i,a){return[i[0]+a[0]-e[0]-t[0],i[1]+a[1]-e[1]-t[1],i[2]+a[2]-e[2]-t[2]]}function bezierPPh(e,t,i,a){return[3*e[0]-5*t[0]+i[0]+a[0],3*e[1]-5*t[1]+i[1]+a[1],3*e[2]-5*t[2]+i[2]+a[2]]}function Straightness(e,t,i,a){let n=[1/3*(a[0]-e[0]),1/3*(a[1]-e[1]),1/3*(a[2]-e[2])];return Math.max(abs2([t[0]-n[0]-e[0],t[1]-n[1]-e[1],t[2]-n[2]-e[2]]),abs2([a[0]-n[0]-i[0],a[1]-n[1]-i[1],a[2]-n[2]-i[2]]))}function Flatness(e,t,i,a){let n=[t[0]-e[0],t[1]-e[1],t[2]-e[2]],r=[a[0]-i[0],a[1]-i[1],a[2]-i[2]];return Math.max(abs2(cross(n,unit(r))),abs2(cross(r,unit(n))))/9}function corners(e,t){return[e,[e[0],e[1],t[2]],[e[0],t[1],e[2]],[e[0],t[1],t[2]],[t[0],e[1],e[2]],[t[0],e[1],t[2]],[t[0],t[1],e[2]],t]}function minbound(e){return[Math.min(e[0][0],e[1][0],e[2][0],e[3][0],e[4][0],e[5][0],e[6][0],e[7][0]),Math.min(e[0][1],e[1][1],e[2][1],e[3][1],e[4][1],e[5][1],e[6][1],e[7][1]),Math.min(e[0][2],e[1][2],e[2][2],e[3][2],e[4][2],e[5][2],e[6][2],e[7][2])]}function maxbound(e){return[Math.max(e[0][0],e[1][0],e[2][0],e[3][0],e[4][0],e[5][0],e[6][0],e[7][0]),Math.max(e[0][1],e[1][1],e[2][1],e[3][1],e[4][1],e[5][1],e[6][1],e[7][1]),Math.max(e[0][2],e[1][2],e[2][2],e[3][2],e[4][2],e[5][2],e[6][2],e[7][2])]}function COBTarget(e,t){mat4.fromTranslation(T,[center.x,center.y,center.z]),mat4.invert(cjMatInv,T),mat4.multiply(e,t,cjMatInv),mat4.multiply(e,T,e)}function setUniforms(e,t){let i=t==pixelShader;gl.useProgram(t),gl.enableVertexAttribArray(positionAttribute),i&&gl.enableVertexAttribArray(widthAttribute);let a=!i&&Lights.length>0;if(a&&gl.enableVertexAttribArray(normalAttribute),gl.enableVertexAttribArray(materialAttribute),t.projViewMatUniform=gl.getUniformLocation(t,"projViewMat"),t.viewMatUniform=gl.getUniformLocation(t,"viewMat"),t.normMatUniform=gl.getUniformLocation(t,"normMat"),t!=colorShader&&t!=transparentShader||gl.enableVertexAttribArray(colorAttribute),a)for(let e=0;e<Lights.length;++e)Lights[e].setUniform(t,e);for(let i=0;i<e.materials.length;++i)e.materials[i].setUniform(t,i);gl.uniformMatrix4fv(t.projViewMatUniform,!1,projViewMat),gl.uniformMatrix4fv(t.viewMatUniform,!1,viewMat),gl.uniformMatrix3fv(t.normMatUniform,!1,normMat)}function handleMouseDown(e){zoomEnabled||enableZoom(),mouseDownOrTouchActive=!0,lastMouseX=e.clientX,lastMouseY=e.clientY}let pinchStart,touchStartTime,pinch=!1;function pinchDistance(e){return Math.hypot(e[0].pageX-e[1].pageX,e[0].pageY-e[1].pageY)}function handleTouchStart(e){e.preventDefault(),zoomEnabled||enableZoom();let t=e.targetTouches;swipe=rotate=pinch=!1,zooming||(1!=t.length||mouseDownOrTouchActive||(touchStartTime=(new Date).getTime(),touchId=t[0].identifier,lastMouseX=t[0].pageX,lastMouseY=t[0].pageY),2!=t.length||mouseDownOrTouchActive||(touchId=t[0].identifier,pinchStart=pinchDistance(t),pinch=!0))}function handleMouseUpOrTouchEnd(e){mouseDownOrTouchActive=!1}function rotateScene(e,t,i,a,n){if(e==i&&t==a)return;let[r,s]=arcball([e,-t],[i,-a]);mat4.fromRotation(T,2*n*ArcballFactor*r/Zoom,s),mat4.multiply(rotMat,T,rotMat)}function shiftScene(e,t,i,a){let n=1/Zoom;shift.x+=(i-e)*n*halfCanvasWidth,shift.y-=(a-t)*n*halfCanvasHeight}function panScene(e,t,i,a){orthographic?shiftScene(e,t,i,a):(center.x+=(i-e)*(viewParam.xmax-viewParam.xmin),center.y-=(a-t)*(viewParam.ymax-viewParam.ymin))}function updateViewMatrix(){COBTarget(viewMat,rotMat),mat4.translate(viewMat,viewMat,[center.x,center.y,0]),mat3.fromMat4(viewMat3,viewMat),mat3.invert(normMat,viewMat3),mat4.multiply(projViewMat,projMat,viewMat)}function capzoom(){let e=Math.sqrt(Number.MAX_VALUE),t=1/e;Zoom<=t&&(Zoom=t),Zoom>=e&&(Zoom=e),(1.5*Zoom<lastZoom||Zoom>1.5*lastZoom)&&(remesh=!0,lastZoom=Zoom)}function zoomImage(e){let t=zoomStep*halfCanvasHeight*e;const i=Math.log(.1*Number.MAX_VALUE)/Math.log(zoomFactor);Math.abs(t)<i&&(Zoom*=zoomFactor**t,capzoom())}function normMouse(e){let t=e[0],i=e[1],a=Math.hypot(t,i);return a>1&&(denom=1/a,t*=denom,i*=denom),[t,i,Math.sqrt(Math.max(1-i*i-t*t,0))]}function arcball(e,t){let i=normMouse(e),a=normMouse(t),n=dot(i,a);return[n>1?0:n<-1?pi:Math.acos(n),unit(cross(i,a))]}function zoomScene(e,t,i,a){zoomImage(t-a)}const DRAGMODE_ROTATE=1,DRAGMODE_SHIFT=2,DRAGMODE_ZOOM=3,DRAGMODE_PAN=4;function processDrag(e,t,i,a=1){let n;switch(i){case 1:n=rotateScene;break;case 2:n=shiftScene;break;case 3:n=zoomScene;break;case 4:n=panScene;break;default:n=(e,t,i,a)=>{}}n((lastMouseX-halfCanvasWidth)/halfCanvasWidth,(lastMouseY-halfCanvasHeight)/halfCanvasHeight,(e-halfCanvasWidth)/halfCanvasWidth,(t-halfCanvasHeight)/halfCanvasHeight,a),lastMouseX=e,lastMouseY=t,setProjection(),drawScene()}let zoomEnabled=0;function enableZoom(){zoomEnabled=1,canvas.addEventListener("wheel",handleMouseWheel,!1)}function disableZoom(){zoomEnabled=0,canvas.removeEventListener("wheel",handleMouseWheel,!1)}function handleKey(e){if(zoomEnabled||enableZoom(),embedded&&zoomEnabled&&27==e.keyCode)return void disableZoom();let t=[];switch(e.key){case"x":t=[1,0,0];break;case"y":t=[0,1,0];break;case"z":t=[0,0,1];break;case"h":home();break;case"m":++wireframe,3==wireframe&&(wireframe=0),2!=wireframe&&(embedded||deleteShaders(),initShaders(ibl)),remesh=!0,drawScene();break;case"+":case"=":case">":expand();break;case"-":case"_":case"<":shrink()}t.length>0&&(mat4.rotate(rotMat,rotMat,.1,t),updateViewMatrix(),drawScene())}function setZoom(){capzoom(),setProjection(),drawScene()}function handleMouseWheel(e){e.preventDefault(),e.deltaY<0?Zoom*=zoomFactor:Zoom/=zoomFactor,setZoom()}function handleMouseMove(e){if(!mouseDownOrTouchActive)return;let t,i=e.clientX,a=e.clientY;t=e.getModifierState("Control")?2:e.getModifierState("Shift")?3:e.getModifierState("Alt")?4:1,processDrag(i,a,t)}let zooming=!1,swipe=!1,rotate=!1;function handleTouchMove(e){if(e.preventDefault(),zooming)return;let t=e.targetTouches;if(!pinch&&1==t.length&&touchId==t[0].identifier){let e=t[0].pageX,i=t[0].pageY,a=e-lastMouseX,n=i-lastMouseY,r=a*a+n*n<=shiftHoldDistance*shiftHoldDistance;if(r&&!swipe&&!rotate&&(new Date).getTime()-touchStartTime>shiftWaitTime&&(navigator.vibrate&&window.navigator.vibrate(vibrateTime),swipe=!0),swipe)processDrag(e,i,2);else if(!r){rotate=!0,processDrag(t[0].pageX,t[0].pageY,1,.5)}}if(pinch&&!swipe&&2==t.length&&touchId==t[0].identifier){let e=pinchDistance(t),i=e-pinchStart;zooming=!0,i*=zoomPinchFactor,i>zoomPinchCap&&(i=zoomPinchCap),i<-zoomPinchCap&&(i=-zoomPinchCap),zoomImage(i/size2),pinchStart=e,swipe=rotate=zooming=!1,setProjection(),drawScene()}}let pixelShader,materialShader,colorShader,transparentShader,zbuffer=[];function transformVertices(e){let t=viewMat[2],i=viewMat[6],a=viewMat[10];zbuffer.length=e.length;for(let n=0;n<e.length;++n){let r=6*n;zbuffer[n]=t*e[r]+i*e[r+1]+a*e[r+2]}}function drawMaterial0(){drawBuffer(material0Data,pixelShader),material0Data.clear()}function drawMaterial1(){drawBuffer(material1Data,materialShader),material1Data.clear()}function drawMaterial(){drawBuffer(materialData,materialShader),materialData.clear()}function drawColor(){drawBuffer(colorData,colorShader),colorData.clear()}function drawTriangle(){drawBuffer(triangleData,transparentShader),triangleData.rendered=!1,triangleData.clear()}function drawTransparent(){let e=transparentData.indices;if(wireframe>0)return drawBuffer(transparentData,transparentShader,e),void transparentData.clear();if(e.length>0){transformVertices(transparentData.vertices);let t=e.length/3,i=Array(t).fill().map((e,t)=>t);i.sort((function(t,i){let a=3*t;Ia=e[a],Ib=e[a+1],Ic=e[a+2];let n=3*i;return IA=e[n],IB=e[n+1],IC=e[n+2],zbuffer[Ia]+zbuffer[Ib]+zbuffer[Ic]<zbuffer[IA]+zbuffer[IB]+zbuffer[IC]?-1:1}));let a=Array(e.length);for(let n=0;n<t;++n){let t=3*i[n];a[3*n]=e[t],a[3*n+1]=e[t+1],a[3*n+2]=e[t+2]}gl.depthMask(!1),drawBuffer(transparentData,transparentShader,a),transparentData.rendered=!1,gl.depthMask(!0)}transparentData.clear()}function drawBuffers(){drawMaterial0(),drawMaterial1(),drawMaterial(),drawColor(),drawTriangle(),drawTransparent(),requestAnimationFrame(drawBuffers)}function drawScene(){embedded&&(offscreen2.width=canvasWidth,offscreen2.height=canvasHeight,setViewport()),gl.clearColor(Background[0],Background[1],Background[2],Background[3]),gl.clear(gl.COLOR_BUFFER_BIT|gl.DEPTH_BUFFER_BIT);for(let e=0;e<P.length;++e)P[e].render();drawBuffers(),embedded&&(context.clearRect(0,0,canvasWidth,canvasHeight),context.drawImage(offscreen2,0,0)),0==wireframe&&(remesh=!1)}function setDimensions(e,t,i,a){let n=e/t,r=1/Zoom,s=(i/e+viewportShift[0])*Zoom,o=(a/t+viewportShift[1])*Zoom;if(orthographic){let e=maxBound[0]-minBound[0],t=maxBound[1]-minBound[1];if(e<t*n){let e=.5*t*n*r,i=2*e*s,a=t*r*o;viewParam.xmin=-e-i,viewParam.xmax=e-i,viewParam.ymin=minBound[1]*r-a,viewParam.ymax=maxBound[1]*r-a}else{let t=.5*e/(n*Zoom),i=e*r*s,a=2*t*o;viewParam.xmin=minBound[0]*r-i,viewParam.xmax=maxBound[0]*r-i,viewParam.ymin=-t-a,viewParam.ymax=t-a}}else{let e=H*r,t=e*n,i=2*t*s,a=2*e*o;viewParam.xmin=-t-i,viewParam.xmax=t-i,viewParam.ymin=-e-a,viewParam.ymax=e-a}}function setProjection(){setDimensions(canvasWidth,canvasHeight,shift.x,shift.y),(orthographic?mat4.ortho:mat4.frustum)(projMat,viewParam.xmin,viewParam.xmax,viewParam.ymin,viewParam.ymax,-viewParam.zmax,-viewParam.zmin),updateViewMatrix()}function initProjection(){H=-Math.tan(.5*angleOfView)*maxBound[2],center.x=center.y=0,center.z=.5*(minBound[2]+maxBound[2]),lastZoom=Zoom=zoom0,viewParam.zmin=minBound[2],viewParam.zmax=maxBound[2],shift.x=shift.y=0}function setViewport(){gl.viewportWidth=canvasWidth,gl.viewportHeight=canvasHeight,gl.viewport(.5*(canvas.width-canvasWidth),.5*(canvas.height-canvasHeight),canvasWidth,canvasHeight),gl.scissor(0,0,canvas.width,canvas.height)}function setCanvas(){embedded&&(canvas.width=offscreen2.width=canvasWidth,canvas.height=offscreen2.height=canvasHeight),size2=Math.hypot(canvasWidth,canvasHeight),halfCanvasWidth=.5*canvas.width,halfCanvasHeight=.5*canvas.height,ArcballFactor=1+8*Math.hypot(viewportMargin[0],viewportMargin[1])/size2}function setsize(e,t){e>maxViewportWidth&&(e=maxViewportWidth),t>maxViewportHeight&&(t=maxViewportHeight),shift.x*=e/canvasWidth,shift.y*=t/canvasHeight,canvasWidth=e,canvasHeight=t,setCanvas(),setViewport(),setProjection(),remesh=!0}function resize(){if(zoom0=initialZoom,absolute&&!embedded)canvasWidth=canvasWidth0*window.devicePixelRatio,canvasHeight=canvasHeight0*window.devicePixelRatio;else{let e=canvasWidth0/canvasHeight0;canvasWidth=Math.max(window.innerWidth-10,10),canvasHeight=Math.max(window.innerHeight-10,10),!orthographic&&canvasWidth<canvasHeight*e&&(zoom0*=canvasWidth/(canvasHeight*e))}canvas.width=canvasWidth,canvas.height=canvasHeight;window.innerWidth,window.innerHeight;viewportShift[0]/=zoom0,viewportShift[1]/=zoom0,setsize(canvasWidth,canvasHeight),redrawScene()}function expand(){Zoom*=zoomFactor,setZoom()}function shrink(){Zoom/=zoomFactor,setZoom()}class Align{constructor(e,t){if(this.center=e,t){let e=t[0],i=t[1];this.ct=Math.cos(e),this.st=Math.sin(e),this.cp=Math.cos(i),this.sp=Math.sin(i)}}T0(e){return[e[0]+this.center[0],e[1]+this.center[1],e[2]+this.center[2]]}T(e){let t=e[0],i=e[1],a=e[2],n=t*this.ct+a*this.st;return[n*this.cp-i*this.sp+this.center[0],n*this.sp+i*this.cp+this.center[1],-t*this.st+a*this.ct+this.center[2]]}}function Tcorners(e,t,i){let a=[e(t),e([t[0],t[1],i[2]]),e([t[0],i[1],t[2]]),e([t[0],i[1],i[2]]),e([i[0],t[1],t[2]]),e([i[0],t[1],i[2]]),e([i[0],i[1],t[2]]),e(i)];return[minbound(a),maxbound(a)]}function material(e,t,i,a,n,r){Materials.push(new Material(e,t,i,a,n,r))}function patch(e,t,i,a,n,r){P.push(new BezierPatch(e,t,i,a,n,r))}function curve(e,t,i,a,n){P.push(new BezierCurve(e,t,i,a,n))}function pixel(e,t,i,a,n){P.push(new Pixel(e,t,i,a,n))}function triangles(e,t,i,a){P.push(new Triangles(e,t,i,a))}function sphere(e,t,i,n,r){let s,o,l,h,c,d,m=.524670512339254,f=.595936986722291,u=.954967051233925,p=.0820155480083437,g=.996685028842544,v=.0549670512339254,x=.998880711874577,w=.0405017186586849,M=[[[1,0,0],[1,0,m],[f,0,u],[p,0,g],[1,a,0],[1,a,m],[f,a*f,u],[p,a*p,g],[a,1,0],[a,1,m],[a*f,f,u],[a*p,p,g],[0,1,0],[0,1,m],[0,f,u],[0,p,g]],[[p,0,g],[p,a*p,g],[v,0,x],[a*p,p,g],[w,w,1],[.05*a,0,1],[0,p,g],[0,v,x],[0,.05*a,1],[0,0,1]]],b=new Align(e,r);function T(e){let t=Array(e.length);for(let i=0;i<e.length;++i){let a=e[i];t[i]=c([s*a[0],o*a[1],l*a[2]])}return t}r?(h=1,d=0,c=b.T.bind(b)):(h=-1,d=-t,c=b.T0.bind(b));let S=Tcorners(c,[-t,-t,d],[t,t,t]),R=S[0],I=S[1];for(let e=-1;e<=1;e+=2){s=e*t;for(let e=-1;e<=1;e+=2){o=e*t;for(let e=h;e<=1;e+=2){l=e*t;for(let e=0;e<2;++e)P.push(new BezierPatch(T(M[e]),i,n,R,I))}}}}let a=4/3*(Math.sqrt(2)-1);function disk(e,t,i,n,r){let s=1-2*a/3,o=[[1,0,0],[1,-a,0],[a,-1,0],[0,-1,0],[1,a,0],[s,0,0],[0,-s,0],[-a,-1,0],[a,1,0],[0,s,0],[-s,0,0],[-1,-a,0],[0,1,0],[-a,1,0],[-1,a,0],[-1,0,0]],l=new Align(e,r);let h=Tcorners(l.T.bind(l),[-t,-t,0],[t,t,0]);P.push(new BezierPatch(function(e){let i=Array(e.length);for(let a=0;a<e.length;++a){let n=e[a];i[a]=l.T([t*n[0],t*n[1],0])}return i}(o),i,n,h[0],h[1]))}function cylinder(e,t,i,n,r,s,o){let l,h,c=[[1,0,0],[1,0,1/3],[1,0,2/3],[1,0,1],[1,a,0],[1,a,1/3],[1,a,2/3],[1,a,1],[a,1,0],[a,1,1/3],[a,1,2/3],[a,1,1],[0,1,0],[0,1,1/3],[0,1,2/3],[0,1,1]],d=new Align(e,s);function m(e){let t=Array(e.length);for(let a=0;a<e.length;++a){let n=e[a];t[a]=d.T([l*n[0],h*n[1],i*n[2]])}return t}let f=Tcorners(d.T.bind(d),[-t,-t,0],[t,t,i]),u=f[0],p=f[1];for(let e=-1;e<=1;e+=2){l=e*t;for(let e=-1;e<=1;e+=2)h=e*t,P.push(new BezierPatch(m(c),n,r,u,p))}if(o){let t=d.T([0,0,i]);P.push(new BezierCurve([e,t],n,r,e,t))}}function rmf(e,t,i,a,n){class r{constructor(e,t,i){this.p=e,this.r=t,this.t=i,this.s=cross(i,t)}}let s=Number.EPSILON*Math.max(abs2(e),abs2(t),abs2(i),abs2(a));function o(n){if(1==n){let n=[a[0]-i[0],a[1]-i[1],a[2]-i[2]];return abs2(n)>s?unit(n):(n=[2*i[0]-t[0]-a[0],2*i[1]-t[1]-a[1],2*i[2]-t[2]-a[2]],abs2(n)>s?unit(n):[a[0]-e[0]+3*(t[0]-i[0]),a[1]-e[1]+3*(t[1]-i[1]),a[2]-e[2]+3*(t[2]-i[2])])}let r=[a[0]-e[0]+3*(t[0]-i[0]),a[1]-e[1]+3*(t[1]-i[1]),a[2]-e[2]+3*(t[2]-i[2])],o=[2*(e[0]+i[0])-4*t[0],2*(e[1]+i[1])-4*t[1],2*(e[2]+i[2])-4*t[2]],l=[t[0]-e[0],t[1]-e[1],t[2]-e[2]],h=n*n,c=[r[0]*h+o[0]*n+l[0],r[1]*h+o[1]*n+l[1],r[2]*h+o[2]*n+l[2]];return abs2(c)>s?unit(c):(h=2*n,c=[r[0]*h+o[0],r[1]*h+o[1],r[2]*h+o[2]],abs2(c)>s?unit(c):unit(r))}let l=Array(n.length),h=[t[0]-e[0],t[1]-e[1],t[2]-e[2]];abs2(h)<s&&(h=[e[0]-2*t[0]+i[0],e[1]-2*t[1]+i[1],e[2]-2*t[2]+i[2]],abs2(h)<s&&(h=[a[0]-e[0]+3*(t[0]-i[0]),a[1]-e[1]+3*(t[1]-i[1]),a[2]-e[2]+3*(t[2]-i[2])])),h=unit(h);let c=function(e){let t=cross(e,[0,1,0]),i=Number.EPSILON*abs2(e);return abs2(t)>i?unit(t):(t=cross(e,[0,0,1]),abs2(t)>i?unit(t):[1,0,0])}(h);l[0]=new r(e,c,h);for(let s=1;s<n.length;++s){let h=l[s-1],c=n[s],d=1-c,m=d*d,f=m*d,u=3*c;m*=u,d*=u*c;let p=c*c*c,g=[f*e[0]+m*t[0]+d*i[0]+p*a[0],f*e[1]+m*t[1]+d*i[1]+p*a[1],f*e[2]+m*t[2]+d*i[2]+p*a[2]],v=[g[0]-h.p[0],g[1]-h.p[1],g[2]-h.p[2]];if(0!=v[0]||0!=v[1]||0!=v[2]){let e=h.r,t=unit(v),i=h.t,a=dot(t,i),n=[i[0]-2*a*t[0],i[1]-2*a*t[1],i[2]-2*a*t[2]];i=o(c);let d=2*dot(t,e),m=[e[0]-d*t[0],e[1]-d*t[1],e[2]-d*t[2]],f=unit([i[0]-n[0],i[1]-n[1],i[2]-n[2]]),u=2*dot(f,m);m=[m[0]-u*f[0],m[1]-u*f[1],m[2]-u*f[2]],l[s]=new r(g,unit(m),unit(i))}else l[s]=l[s-1]}return l}function tube(e,t,i,n,r,s,o){let l=rmf(e[0],e[1],e[2],e[3],[0,1/3,2/3,1]),h=a*t,c=[[t,0],[t,h],[h,t],[0,t]];function d(t,a,o,h){let d=Array(16);for(let i=0;i<4;++i){let n=l[i],r=n.r[0],s=n.s[0],m=r*t+s*a,f=r*o+s*h;r=n.r[1],s=n.s[1];let u=r*t+s*a,p=r*o+s*h;r=n.r[2],s=n.s[2];let g=r*t+s*a,v=r*o+s*h,x=e[i],w=x[0];w1=x[1],w2=x[2];for(let e=0;e<4;++e){let t=c[e],a=t[0],n=t[1];d[4*i+e]=[m*a+f*n+w,u*a+p*n+w1,g*a+v*n+w2]}}P.push(new BezierPatch(d,i,n,r,s))}d(1,0,0,1),d(0,-1,1,0),d(-1,0,0,-1),d(0,1,-1,0),o&&P.push(new BezierCurve(e,i,n,r,s))}async function getReq(e){return(await fetch(e)).arrayBuffer()}function rgb(e){return e.getBytes().filter((e,t)=>t%4!=3)}function createTexture(e,t,i=gl.RGB16F){let a=e.width(),n=e.height(),r=gl.createTexture();return gl.activeTexture(gl.TEXTURE0+t),gl.bindTexture(gl.TEXTURE_2D,r),gl.pixelStorei(gl.UNPACK_ALIGNMENT,1),gl.texParameteri(gl.TEXTURE_2D,gl.TEXTURE_MIN_FILTER,gl.LINEAR),gl.texParameteri(gl.TEXTURE_2D,gl.TEXTURE_MAG_FILTER,gl.LINEAR),gl.texImage2D(gl.TEXTURE_2D,0,i,a,n,0,gl.RGB,gl.FLOAT,rgb(e)),r}async function initIBL(){let e=imageURL+image+"/";function t(e){return new Promise(t=>setTimeout(t,e))}for(;!Module.EXRLoader;)await t(0);promises=[getReq(imageURL+"refl.exr").then(e=>{let t=new Module.EXRLoader(e);IBLbdrfMap=createTexture(t,0)}),getReq(e+"diffuse.exr").then(e=>{let t=new Module.EXRLoader(e);IBLDiffuseMap=createTexture(t,1)})],refl_promise=[],refl_promise.push(getReq(e+"refl0.exr"));for(let t=1;t<=roughnessStepCount;++t)refl_promise.push(getReq(e+"refl"+t+"w.exr"));finished_promise=Promise.all(refl_promise).then(e=>{let t=gl.createTexture();gl.activeTexture(gl.TEXTURE0+2),gl.pixelStorei(gl.UNPACK_ALIGNMENT,1),gl.bindTexture(gl.TEXTURE_2D,t),gl.texParameteri(gl.TEXTURE_2D,gl.TEXTURE_MAX_LEVEL,e.length-1),gl.texParameteri(gl.TEXTURE_2D,gl.TEXTURE_MIN_FILTER,gl.LINEAR_MIPMAP_LINEAR),gl.texParameteri(gl.TEXTURE_2D,gl.TEXTURE_MAG_FILTER,gl.LINEAR),gl.texParameterf(gl.TEXTURE_2D,gl.TEXTURE_MIN_LOD,0),gl.texParameterf(gl.TEXTURE_2D,gl.TEXTURE_MAX_LOD,roughnessStepCount);for(let t=0;t<e.length;++t){let i=new Module.EXRLoader(e[t]);gl.texImage2D(gl.TEXTURE_2D,t,gl.RGB16F,i.width(),i.height(),0,gl.RGB,gl.FLOAT,rgb(i))}IBLReflMap=t}),promises.push(finished_promise),await Promise.all(promises)}function webGLStart(){canvas=document.getElementById("Asymptote"),embedded=window.top.document!=document,initGL(),gl.enable(gl.BLEND),gl.blendFunc(gl.SRC_ALPHA,gl.ONE_MINUS_SRC_ALPHA),gl.enable(gl.DEPTH_TEST),gl.enable(gl.SCISSOR_TEST),canvas.onmousedown=handleMouseDown,document.onmouseup=handleMouseUpOrTouchEnd,document.onmousemove=handleMouseMove,canvas.onkeydown=handleKey,embedded||enableZoom(),canvas.addEventListener("touchstart",handleTouchStart,!1),canvas.addEventListener("touchend",handleMouseUpOrTouchEnd,!1),canvas.addEventListener("touchcancel",handleMouseUpOrTouchEnd,!1),canvas.addEventListener("touchleave",handleMouseUpOrTouchEnd,!1),canvas.addEventListener("touchmove",handleTouchMove,!1),document.addEventListener("keydown",handleKey,!1),canvasWidth0=canvasWidth,canvasHeight0=canvasHeight,mat4.identity(rotMat),0!=window.innerWidth&&0!=window.innerHeight&&resize(),window.addEventListener("resize",resize,!1),ibl&&initIBL().then(SetIBL).then(redrawScene)}
+let vertex="\n#ifdef WEBGL2\n#define IN in\n#define OUT out\n#else\n#define IN attribute\n#define OUT varying\n#endif\n\nIN vec3 position;\n#ifdef WIDTH\nIN float width;\n#endif\n#ifdef NORMAL\nIN vec3 normal;\n#endif\n\nIN float materialIndex;\n\n#ifdef WEBGL2\nflat out int MaterialIndex;\n#ifdef COLOR\nOUT vec4 Color;\n#endif\n\n#else\nOUT vec4 diffuse;\nOUT vec3 specular;\nOUT float roughness,metallic,fresnel0;\nOUT vec4 emissive;\n\nstruct Material {\n  vec4 diffuse,emissive,specular;\n  vec4 parameters;\n};\n\nuniform Material Materials[Nmaterials];\n#endif\n\n#ifdef COLOR\nIN vec4 color;\n#endif\n\nuniform mat3 normMat;\nuniform mat4 viewMat;\nuniform mat4 projViewMat;\n\n#ifdef NORMAL\n#ifndef ORTHOGRAPHIC\nOUT vec3 ViewPosition;\n#endif\nOUT vec3 Normal;\n#endif\n\nvoid main(void)\n{\n  vec4 v=vec4(position,1.0);\n  gl_Position=projViewMat*v;\n\n#ifdef NORMAL\n#ifndef ORTHOGRAPHIC\n  ViewPosition=(viewMat*v).xyz;\n#endif\n  Normal=normalize(normal*normMat);\n#endif\n\n#ifdef WEBGL2\n  MaterialIndex=int(materialIndex);\n#ifdef COLOR\n  Color=color;\n#endif\n#else\n#ifdef NORMAL\n  Material m;\n#ifdef TRANSPARENT\n  m=Materials[int(abs(materialIndex))-1];\n  emissive=m.emissive;\n  if(materialIndex >= 0.0)\n    diffuse=m.diffuse;\n  else {\n    diffuse=color;\n#if nlights == 0\n    emissive += color;\n#endif\n  }\n#else\n  m=Materials[int(materialIndex)];\n  emissive=m.emissive;\n#ifdef COLOR\n  diffuse=color;\n#if nlights == 0\n    emissive += color;\n#endif\n#else\n  diffuse=m.diffuse;\n#endif // COLOR\n#endif // TRANSPARENT\n  specular=m.specular.rgb;\n  vec4 parameters=m.parameters;\n  roughness=1.0-parameters[0];\n  metallic=parameters[1];\n  fresnel0=parameters[2];\n#else\n  emissive=Materials[int(materialIndex)].emissive;\n#endif // NORMAL\n#endif // WEBGL2\n\n#ifdef WIDTH\n  gl_PointSize=width;\n#endif\n}\n",fragment="\n#ifdef WEBGL2\n#define IN in\nout vec4 outValue;\n#define OUTVALUE outValue\n#else\n#define IN varying\n#define OUTVALUE gl_FragColor\n#endif\n\n#ifdef WEBGL2\nflat in int MaterialIndex;\n\nstruct Material {\n  vec4 diffuse,emissive,specular;\n  vec4 parameters;\n};\n\nuniform Material Materials[Nmaterials];\n\nvec4 diffuse;\nvec3 specular;\nfloat roughness,metallic,fresnel0;\nvec4 emissive;\n\n#ifdef COLOR\nin vec4 Color;\n#endif\n\n#else\nIN vec4 diffuse;\nIN vec3 specular;\nIN float roughness,metallic,fresnel0;\nIN vec4 emissive;\n#endif\n\n#ifdef NORMAL\n\n#ifndef ORTHOGRAPHIC\nIN vec3 ViewPosition;\n#endif\nIN vec3 Normal;\n\nvec3 normal;\n\nstruct Light {\n  vec3 direction;\n  vec3 color;\n};\n\nuniform Light Lights[Nlights];\n\n#ifdef USE_IBL\nuniform sampler2D reflBRDFSampler;\nuniform sampler2D diffuseSampler;\nuniform sampler2D reflImgSampler;\n\nconst float pi=acos(-1.0);\nconst float piInv=1.0/pi;\nconst float twopi=2.0*pi;\nconst float twopiInv=1.0/twopi;\n\n// (x,y,z) -> (r,theta,phi);\n// theta -> [0,pi]: colatitude\n// phi -> [-pi,pi]: longitude\nvec3 cart2sphere(vec3 cart)\n{\n  float x=cart.x;\n  float y=cart.z;\n  float z=cart.y;\n\n  float r=length(cart);\n  float theta=r > 0.0 ? acos(z/r) : 0.0;\n  float phi=atan(y,x);\n\n  return vec3(r,theta,phi);\n}\n\nvec2 normalizedAngle(vec3 cartVec)\n{\n  vec3 sphericalVec=cart2sphere(cartVec);\n  sphericalVec.y=sphericalVec.y*piInv;\n  sphericalVec.z=0.75-sphericalVec.z*twopiInv;\n  return sphericalVec.zy;\n}\n\nvec3 IBLColor(vec3 viewDir)\n{\n  vec3 IBLDiffuse=diffuse.rgb*texture(diffuseSampler,normalizedAngle(normal)).rgb;\n  vec3 reflectVec=normalize(reflect(-viewDir,normal));\n  vec2 reflCoord=normalizedAngle(reflectVec);\n  vec3 IBLRefl=textureLod(reflImgSampler,reflCoord,roughness*ROUGHNESS_STEP_COUNT).rgb;\n  vec2 IBLbrdf=texture(reflBRDFSampler,vec2(dot(normal,viewDir),roughness)).rg;\n  float specularMultiplier=fresnel0*IBLbrdf.x+IBLbrdf.y;\n  vec3 dielectric=IBLDiffuse+specularMultiplier*IBLRefl;\n  vec3 metal=diffuse.rgb*IBLRefl;\n  return mix(dielectric,metal,metallic);\n}\n#else\nfloat Roughness2;\nfloat NDF_TRG(vec3 h)\n{\n  float ndoth=max(dot(normal,h),0.0);\n  float alpha2=Roughness2*Roughness2;\n  float denom=ndoth*ndoth*(alpha2-1.0)+1.0;\n  return denom != 0.0 ? alpha2/(denom*denom) : 0.0;\n}\n\nfloat GGX_Geom(vec3 v)\n{\n  float ndotv=max(dot(v,normal),0.0);\n  float ap=1.0+Roughness2;\n  float k=0.125*ap*ap;\n  return ndotv/((ndotv*(1.0-k))+k);\n}\n\nfloat Geom(vec3 v, vec3 l)\n{\n  return GGX_Geom(v)*GGX_Geom(l);\n}\n\nfloat Fresnel(vec3 h, vec3 v, float fresnel0)\n{\n  float a=1.0-max(dot(h,v),0.0);\n  float b=a*a;\n  return fresnel0+(1.0-fresnel0)*b*b*a;\n}\n\n// physical based shading using UE4 model.\nvec3 BRDF(vec3 viewDirection, vec3 lightDirection)\n{\n  vec3 lambertian=diffuse.rgb;\n  vec3 h=normalize(lightDirection+viewDirection);\n\n  float omegain=max(dot(viewDirection,normal),0.0);\n  float omegaln=max(dot(lightDirection,normal),0.0);\n\n  float D=NDF_TRG(h);\n  float G=Geom(viewDirection,lightDirection);\n  float F=Fresnel(h,viewDirection,fresnel0);\n\n  float denom=4.0*omegain*omegaln;\n  float rawReflectance=denom > 0.0 ? (D*G)/denom : 0.0;\n\n  vec3 dielectric=mix(lambertian,rawReflectance*specular,F);\n  vec3 metal=rawReflectance*diffuse.rgb;\n\n  return mix(dielectric,metal,metallic);\n}\n#endif\n\n#endif\n\nvoid main(void)\n{\n#ifdef WEBGL2\n#ifdef NORMAL\n  Material m;\n#ifdef TRANSPARENT\n  m=Materials[abs(MaterialIndex)-1];\n  emissive=m.emissive;\n  if(MaterialIndex >= 0)\n    diffuse=m.diffuse;\n  else {\n    diffuse=Color;\n#if nlights == 0\n    emissive += Color;\n#endif\n  }\n#else\n  m=Materials[MaterialIndex];\n  emissive=m.emissive;\n#ifdef COLOR\n  diffuse=Color;\n#if nlights == 0\n    emissive += Color;\n#endif\n#else\n  diffuse=m.diffuse;\n#endif // COLOR\n#endif // TRANSPARENT\n  specular=m.specular.rgb;\n  vec4 parameters=m.parameters;\n  roughness=1.0-parameters[0];\n  metallic=parameters[1];\n  fresnel0=parameters[2];\n#else\n  emissive=Materials[MaterialIndex].emissive;\n#endif // NORMAL\n#endif // WEBGL2\n\n#if defined(NORMAL) && nlights > 0\n  normal=normalize(Normal);\n  normal=gl_FrontFacing ? normal : -normal;\n#ifdef ORTHOGRAPHIC\n  vec3 viewDir=vec3(0.0,0.0,1.0);\n#else\n  vec3 viewDir=-normalize(ViewPosition);\n#endif\n\nvec3 color;\n#ifdef USE_IBL\n  color=IBLColor(viewDir);\n#else\n  Roughness2=roughness*roughness;\n  color=emissive.rgb;\n  for(int i=0; i < nlights; ++i) {\n    Light Li=Lights[i];\n    vec3 L=Li.direction;\n    float cosTheta=max(dot(normal,L),0.0);\n    vec3 radiance=cosTheta*Li.color;\n    color += BRDF(viewDir,L)*radiance;\n  }\n#endif\n  OUTVALUE=vec4(color,diffuse.a);\n#else\n  OUTVALUE=emissive;\n#endif\n}\n";!function(e,t){if("object"==typeof exports&&"object"==typeof module)module.exports=t();else if("function"==typeof define&&define.amd)define([],t);else{var i=t();for(var a in i)("object"==typeof exports?exports:e)[a]=i[a]}}("undefined"!=typeof self?self:this,(function(){return function(e){var t={};function i(a){if(t[a])return t[a].exports;var n=t[a]={i:a,l:!1,exports:{}};return 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a=i[0],n=i[1],r=i[2],s=void 0,o=void 0,l=void 0,h=void 0,c=void 0,d=void 0,m=void 0,f=void 0,u=void 0,p=void 0,g=void 0,v=void 0;t===e?(e[12]=t[0]*a+t[4]*n+t[8]*r+t[12],e[13]=t[1]*a+t[5]*n+t[9]*r+t[13],e[14]=t[2]*a+t[6]*n+t[10]*r+t[14],e[15]=t[3]*a+t[7]*n+t[11]*r+t[15]):(s=t[0],o=t[1],l=t[2],h=t[3],c=t[4],d=t[5],m=t[6],f=t[7],u=t[8],p=t[9],g=t[10],v=t[11],e[0]=s,e[1]=o,e[2]=l,e[3]=h,e[4]=c,e[5]=d,e[6]=m,e[7]=f,e[8]=u,e[9]=p,e[10]=g,e[11]=v,e[12]=s*a+c*n+u*r+t[12],e[13]=o*a+d*n+p*r+t[13],e[14]=l*a+m*n+g*r+t[14],e[15]=h*a+f*n+v*r+t[15]);return e},t.rotate=function(e,t,i,n){var r,s,o,l,h,c,d,m,f,u,p,g,v,x,w,M,b,T,S,R,I,A,E,P,L=n[0],D=n[1],y=n[2],O=Math.sqrt(L*L+D*D+y*y);if(Math.abs(O)<a.EPSILON)return null;L*=O=1/O,D*=O,y*=O,r=Math.sin(i),s=Math.cos(i),o=1-s,l=t[0],h=t[1],c=t[2],d=t[3],m=t[4],f=t[5],u=t[6],p=t[7],g=t[8],v=t[9],x=t[10],w=t[11],M=L*L*o+s,b=D*L*o+y*r,T=y*L*o-D*r,S=L*D*o-y*r,R=D*D*o+s,I=y*D*o+L*r,A=L*y*o+D*r,E=D*y*o-L*r,P=y*y*o+s,e[0]=l*M+m*b+g*T,e[1]=h*M+f*b+v*T,e[2]=c*M+u*b+x*T,e[3]=d*M+p*b+w*T,e[4]=l*S+m*R+g*I,e[5]=h*S+f*R+v*I,e[6]=c*S+u*R+x*I,e[7]=d*S+p*R+w*I,e[8]=l*A+m*E+g*P,e[9]=h*A+f*E+v*P,e[10]=c*A+u*E+x*P,e[11]=d*A+p*E+w*P,t!==e&&(e[12]=t[12],e[13]=t[13],e[14]=t[14],e[15]=t[15]);return e},t.fromTranslation=function(e,t){return e[0]=1,e[1]=0,e[2]=0,e[3]=0,e[4]=0,e[5]=1,e[6]=0,e[7]=0,e[8]=0,e[9]=0,e[10]=1,e[11]=0,e[12]=t[0],e[13]=t[1],e[14]=t[2],e[15]=1,e},t.fromRotation=function(e,t,i){var n,r,s,o=i[0],l=i[1],h=i[2],c=Math.sqrt(o*o+l*l+h*h);if(Math.abs(c)<a.EPSILON)return null;return 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a=t[0],n=t[1],r=t[2],s=t[3],o=t[4],l=t[5],h=t[6],c=t[7],d=t[8],m=t[9],f=t[10],u=t[11],p=t[12],g=t[13],v=t[14],x=t[15],w=i[0],M=i[1],b=i[2],T=i[3];return e[0]=w*a+M*o+b*d+T*p,e[1]=w*n+M*l+b*m+T*g,e[2]=w*r+M*h+b*f+T*v,e[3]=w*s+M*c+b*u+T*x,w=i[4],M=i[5],b=i[6],T=i[7],e[4]=w*a+M*o+b*d+T*p,e[5]=w*n+M*l+b*m+T*g,e[6]=w*r+M*h+b*f+T*v,e[7]=w*s+M*c+b*u+T*x,w=i[8],M=i[9],b=i[10],T=i[11],e[8]=w*a+M*o+b*d+T*p,e[9]=w*n+M*l+b*m+T*g,e[10]=w*r+M*h+b*f+T*v,e[11]=w*s+M*c+b*u+T*x,w=i[12],M=i[13],b=i[14],T=i[15],e[12]=w*a+M*o+b*d+T*p,e[13]=w*n+M*l+b*m+T*g,e[14]=w*r+M*h+b*f+T*v,e[15]=w*s+M*c+b*u+T*x,e}}])}));let canvasWidth,canvasHeight,imageURL,image,minBound,maxBound,orthographic,angleOfView,initialZoom,viewportMargin,zoomFactor,zoomPinchFactor,zoomPinchCap,zoomStep,shiftHoldDistance,shiftWaitTime,vibrateTime,canvasWidth0,canvasHeight0,zoom0,embedded,canvas,gl,alpha,offscreen,context,maxMaterials,halfCanvasWidth,halfCanvasHeight,P=[],Materials=[],Lights=[],Centers=[],Background=[1,1,1,1],absolute=!1,ibl=!1,viewportShift=[0,0],webgl2=!1,nlights=0,Nmaterials=2,materials=[];const pixelResolution=.75,zoomRemeshFactor=1.5,FillFactor=.1,windowTrim=10,third=1/3;let Zoom,lastZoom,maxViewportWidth,maxViewportHeight,H,zmin,zmax,size2,ArcballFactor,rotMat=mat4.create(),projMat=mat4.create(),viewMat=mat4.create(),projViewMat=mat4.create(),normMat=mat3.create(),viewMat3=mat3.create(),cjMatInv=mat4.create(),T=mat4.create(),center={x:0,y:0,z:0},shift={x:0,y:0},viewParam={xmin:0,xmax:0,ymin:0,ymax:0,zmin:0,zmax:0},remesh=!0,wireframe=0,mouseDownOrTouchActive=!1,lastMouseX=null,lastMouseY=null,touchID=null,Positions=[],Normals=[],Colors=[],Indices=[],IBLReflMap=null,IBLDiffuseMap=null,IBLbdrfMap=null;function IBLReady(){return null!==IBLReflMap&&null!==IBLDiffuseMap&&null!==IBLbdrfMap}function SetIBL(){embedded||deleteShaders(),initShaders(ibl)}let roughnessStepCount=8;class Material{constructor(e,t,i,a,n,r){this.diffuse=e,this.emissive=t,this.specular=i,this.shininess=a,this.metallic=n,this.fresnel0=r}setUniform(e,t){let i=i=>gl.getUniformLocation(e,"Materials["+t+"]."+i);gl.uniform4fv(i("diffuse"),new Float32Array(this.diffuse)),gl.uniform4fv(i("emissive"),new Float32Array(this.emissive)),gl.uniform4fv(i("specular"),new Float32Array(this.specular)),gl.uniform4f(i("parameters"),this.shininess,this.metallic,this.fresnel0,0)}}let indexExt,TRIANGLES,material0Data,material1Data,materialData,colorData,transparentData,triangleData,materialIndex,enumPointLight=1,enumDirectionalLight=2;class Light{constructor(e,t){this.direction=e,this.color=t}setUniform(e,t){let i=i=>gl.getUniformLocation(e,"Lights["+t+"]."+i);gl.uniform3fv(i("direction"),new Float32Array(this.direction)),gl.uniform3fv(i("color"),new Float32Array(this.color))}}function initShaders(e=!1){let t=gl.getParameter(gl.MAX_VERTEX_UNIFORM_VECTORS);maxMaterials=Math.floor((t-14)/4),Nmaterials=Math.min(Math.max(Nmaterials,Materials.length),maxMaterials),pixelOpt=["WIDTH"],materialOpt=["NORMAL"],colorOpt=["NORMAL","COLOR"],transparentOpt=["NORMAL","COLOR","TRANSPARENT"],e&&(materialOpt.push("USE_IBL"),transparentOpt.push("USE_IBL")),pixelShader=initShader(pixelOpt),materialShader=initShader(materialOpt),colorShader=initShader(colorOpt),transparentShader=initShader(transparentOpt)}function deleteShaders(){gl.deleteProgram(transparentShader),gl.deleteProgram(colorShader),gl.deleteProgram(materialShader),gl.deleteProgram(pixelShader)}function saveAttributes(){let e=webgl2?window.top.document.asygl2[alpha]:window.top.document.asygl[alpha];e.gl=gl,e.nlights=Lights.length,e.Nmaterials=Nmaterials,e.maxMaterials=maxMaterials,e.pixelShader=pixelShader,e.materialShader=materialShader,e.colorShader=colorShader,e.transparentShader=transparentShader}function restoreAttributes(){let e=webgl2?window.top.document.asygl2[alpha]:window.top.document.asygl[alpha];gl=e.gl,nlights=e.nlights,Nmaterials=e.Nmaterials,maxMaterials=e.maxMaterials,pixelShader=e.pixelShader,materialShader=e.materialShader,colorShader=e.colorShader,transparentShader=e.transparentShader}function webGL(e,t){let i;return webgl2&&(i=e.getContext("webgl2",{alpha:t}),embedded&&!i)?(webgl2=!1,ibl=!1,initGL(!1),null):(i||(webgl2=!1,ibl=!1,i=e.getContext("webgl",{alpha:t})),i||alert("Could not initialize WebGL"),i)}function initGL(e=!0){if(ibl&&(webgl2=!0),alpha=Background[3]<1,embedded){let t=window.top.document;if(e&&(context=canvas.getContext("2d")),offscreen=webgl2?t.offscreen2:t.offscreen,offscreen||(offscreen=t.createElement("canvas"),webgl2?t.offscreen2=offscreen:t.offscreen=offscreen),webgl2?t.asygl2||(t.asygl2=Array(2)):t.asygl||(t.asygl=Array(2)),asygl=webgl2?t.asygl2:t.asygl,asygl[alpha]&&asygl[alpha].gl)restoreAttributes(),(Lights.length!=nlights||Math.min(Materials.length,maxMaterials)>Nmaterials)&&(initShaders(),saveAttributes());else{if(rc=webGL(offscreen,alpha),!rc)return;gl=rc,initShaders(),webgl2?t.asygl2[alpha]={}:t.asygl[alpha]={},saveAttributes()}}else gl=webGL(canvas,alpha),initShaders();indexExt=gl.getExtension("OES_element_index_uint"),TRIANGLES=gl.TRIANGLES,material0Data=new vertexBuffer(gl.POINTS),material1Data=new vertexBuffer(gl.LINES),materialData=new vertexBuffer,colorData=new vertexBuffer,transparentData=new vertexBuffer,triangleData=new vertexBuffer}function getShader(e,t,i,a=[]){let n=webgl2?"300 es":"100",r=Array(...a),s=[["nlights",0==wireframe?Lights.length:0],["Nmaterials",Nmaterials]],o=[["int","Nlights",Math.max(Lights.length,1)]];webgl2&&r.push("WEBGL2"),ibl&&s.push(["ROUGHNESS_STEP_COUNT",roughnessStepCount.toFixed(2)]),orthographic&&r.push("ORTHOGRAPHIC"),macros_str=s.map(e=>`#define ${e[0]} ${e[1]}`).join("\n"),define_str=r.map(e=>"#define "+e).join("\n"),const_str=o.map(e=>`const ${e[0]} ${e[1]}=${e[2]};`).join("\n"),ext_str=[].map(e=>`#extension ${e}: enable`).join("\n"),shaderSrc=`#version ${n}\n${ext_str}\n${define_str}\n${const_str}\n${macros_str}\n\n\n#ifdef GL_FRAGMENT_PRECISION_HIGH\nprecision highp float;\n#else\nprecision mediump float;\n#endif\n  \n${t}\n  `;let l=e.createShader(i);return e.shaderSource(l,shaderSrc),e.compileShader(l),e.getShaderParameter(l,e.COMPILE_STATUS)?l:(alert(e.getShaderInfoLog(l)),null)}function registerBuffer(e,t,i,a=gl.ARRAY_BUFFER){return e.length>0&&(0==t&&(t=gl.createBuffer(),i=!0),gl.bindBuffer(a,t),i&&gl.bufferData(a,e,gl.STATIC_DRAW)),t}function drawBuffer(e,t,i=e.indices){if(0==e.indices.length)return;let a=t!=pixelShader;setUniforms(e,t),null!=IBLDiffuseMap&&(gl.activeTexture(gl.TEXTURE0),gl.bindTexture(gl.TEXTURE_2D,IBLbdrfMap),gl.uniform1i(gl.getUniformLocation(t,"reflBRDFSampler"),0),gl.activeTexture(gl.TEXTURE1),gl.bindTexture(gl.TEXTURE_2D,IBLDiffuseMap),gl.uniform1i(gl.getUniformLocation(t,"diffuseSampler"),1),gl.activeTexture(gl.TEXTURE2),gl.bindTexture(gl.TEXTURE_2D,IBLReflMap),gl.uniform1i(gl.getUniformLocation(t,"reflImgSampler"),2));let n=remesh||e.partial||!e.rendered;e.verticesBuffer=registerBuffer(new Float32Array(e.vertices),e.verticesBuffer,n),gl.vertexAttribPointer(positionAttribute,3,gl.FLOAT,!1,a?24:16,0),a?Lights.length>0&&gl.vertexAttribPointer(normalAttribute,3,gl.FLOAT,!1,24,12):gl.vertexAttribPointer(widthAttribute,1,gl.FLOAT,!1,16,12),e.materialsBuffer=registerBuffer(new Int16Array(e.materialIndices),e.materialsBuffer,n),gl.vertexAttribPointer(materialAttribute,1,gl.SHORT,!1,2,0),t!=colorShader&&t!=transparentShader||(e.colorsBuffer=registerBuffer(new Uint8Array(e.colors),e.colorsBuffer,n),gl.vertexAttribPointer(colorAttribute,4,gl.UNSIGNED_BYTE,!0,0,0)),e.indicesBuffer=registerBuffer(indexExt?new Uint32Array(i):new Uint16Array(i),e.indicesBuffer,n,gl.ELEMENT_ARRAY_BUFFER),e.rendered=!0,gl.drawElements(a?wireframe?gl.LINES:e.type:gl.POINTS,i.length,indexExt?gl.UNSIGNED_INT:gl.UNSIGNED_SHORT,0)}class vertexBuffer{constructor(e){this.type=e||TRIANGLES,this.verticesBuffer=0,this.materialsBuffer=0,this.colorsBuffer=0,this.indicesBuffer=0,this.rendered=!1,this.partial=!1,this.clear()}clear(){this.vertices=[],this.materialIndices=[],this.colors=[],this.indices=[],this.nvertices=0,this.materials=[],this.materialTable=[]}vertex(e,t){return this.vertices.push(e[0]),this.vertices.push(e[1]),this.vertices.push(e[2]),this.vertices.push(t[0]),this.vertices.push(t[1]),this.vertices.push(t[2]),this.materialIndices.push(materialIndex),this.nvertices++}Vertex(e,t,i=[0,0,0,0]){return this.vertices.push(e[0]),this.vertices.push(e[1]),this.vertices.push(e[2]),this.vertices.push(t[0]),this.vertices.push(t[1]),this.vertices.push(t[2]),this.materialIndices.push(materialIndex),this.colors.push(i[0]),this.colors.push(i[1]),this.colors.push(i[2]),this.colors.push(i[3]),this.nvertices++}vertex0(e,t){return this.vertices.push(e[0]),this.vertices.push(e[1]),this.vertices.push(e[2]),this.vertices.push(t),this.materialIndices.push(materialIndex),this.nvertices++}iVertex(e,t,i,a=[0,0,0,0]){let n=6*e;this.vertices[n]=t[0],this.vertices[n+1]=t[1],this.vertices[n+2]=t[2],this.vertices[n+3]=i[0],this.vertices[n+4]=i[1],this.vertices[n+5]=i[2],this.materialIndices[e]=materialIndex;let r=4*e;this.colors[r]=a[0],this.colors[r+1]=a[1],this.colors[r+2]=a[2],this.colors[r+3]=a[3],this.indices.push(e)}append(e){append(this.vertices,e.vertices),append(this.materialIndices,e.materialIndices),append(this.colors,e.colors),appendOffset(this.indices,e.indices,this.nvertices),this.nvertices+=e.nvertices}}function append(e,t){let i=e.length,a=t.length;e.length+=a;for(let n=0;n<a;++n)e[i+n]=t[n]}function appendOffset(e,t,i){let a=e.length,n=t.length;e.length+=t.length;for(let r=0;r<n;++r)e[a+r]=t[r]+i}class Geometry{constructor(){this.data=new vertexBuffer,this.Onscreen=!1,this.m=[]}offscreen(e){let t=projViewMat,i=e[0],a=i[0],n=i[1],r=i[2],s=1/(t[3]*a+t[7]*n+t[11]*r+t[15]);this.x=this.X=(t[0]*a+t[4]*n+t[8]*r+t[12])*s,this.y=this.Y=(t[1]*a+t[5]*n+t[9]*r+t[13])*s;for(let i=1,a=e.length;i<a;++i){let a=e[i],n=a[0],r=a[1],s=a[2],o=1/(t[3]*n+t[7]*r+t[11]*s+t[15]),l=(t[0]*n+t[4]*r+t[8]*s+t[12])*o,h=(t[1]*n+t[5]*r+t[9]*s+t[13])*o;l<this.x?this.x=l:l>this.X&&(this.X=l),h<this.y?this.y=h:h>this.Y&&(this.Y=h)}return(this.X<-1.01||this.x>1.01||this.Y<-1.01||this.y>1.01)&&(this.Onscreen=!1,!0)}T(e){let t=this.c[0],i=this.c[1],a=this.c[2],n=e[0]-t,r=e[1]-i,s=e[2]-a;return[n*normMat[0]+r*normMat[3]+s*normMat[6]+t,n*normMat[1]+r*normMat[4]+s*normMat[7]+i,n*normMat[2]+r*normMat[5]+s*normMat[8]+a]}Tcorners(e,t){return[this.T(e),this.T([e[0],e[1],t[2]]),this.T([e[0],t[1],e[2]]),this.T([e[0],t[1],t[2]]),this.T([t[0],e[1],e[2]]),this.T([t[0],e[1],t[2]]),this.T([t[0],t[1],e[2]]),this.T(t)]}setMaterial(e,t){null==e.materialTable[this.MaterialIndex]&&(e.materials.length>=Nmaterials&&(e.partial=!0,t()),e.materialTable[this.MaterialIndex]=e.materials.length,e.materials.push(Materials[this.MaterialIndex])),materialIndex=e.materialTable[this.MaterialIndex]}render(){let e;if(this.setMaterialIndex(),0==this.CenterIndex?e=corners(this.Min,this.Max):(this.c=Centers[this.CenterIndex-1],e=this.Tcorners(this.Min,this.Max)),this.offscreen(e))return this.data.clear(),void this.notRendered();let t,i=this.controlpoints;if(0==this.CenterIndex){if(!remesh&&this.Onscreen)return void this.append();t=i}else{let e=i.length;t=Array(e);for(let a=0;a<e;++a)t[a]=this.T(i[a])}let a=orthographic?1:this.Min[2]/maxBound[2],n=.75*Math.hypot(a*(viewParam.xmax-viewParam.xmin),a*(viewParam.ymax-viewParam.ymin))/size2;this.res2=n*n,this.Epsilon=.1*n,this.data.clear(),this.notRendered(),this.Onscreen=!0,this.process(t)}}class BezierPatch extends Geometry{constructor(e,t,i,a,n,r){super(),this.controlpoints=e,this.CenterIndex=t,this.MaterialIndex=i,this.Min=a,this.Max=n,this.color=r;let s=e.length;if(r){let e=r[0][3]+r[1][3]+r[2][3];this.transparent=16==s||4==s?e+r[3][3]<1020:e<765}else this.transparent=Materials[i].diffuse[3]<1;this.vertex=this.transparent?this.data.Vertex.bind(this.data):this.data.vertex.bind(this.data),this.L2norm(this.controlpoints)}setMaterialIndex(){this.transparent?this.setMaterial(transparentData,drawTransparent):this.color?this.setMaterial(colorData,drawColor):this.setMaterial(materialData,drawMaterial)}L2norm(e){let t=e[0];this.epsilon=0;let i=e.length;for(let a=1;a<i;++a)this.epsilon=Math.max(this.epsilon,abs2([e[a][0]-t[0],e[a][1]-t[1],e[a][2]-t[2]]));this.epsilon*=Number.EPSILON}processTriangle(e){let t=e[0],i=e[1],a=e[2],n=unit(cross([i[0]-t[0],i[1]-t[1],i[2]-t[2]],[a[0]-t[0],a[1]-t[1],a[2]-t[2]]));if(!this.offscreen([t,i,a])){let e,r,s;this.color?(e=this.data.Vertex(t,n,this.color[0]),r=this.data.Vertex(i,n,this.color[1]),s=this.data.Vertex(a,n,this.color[2])):(e=this.vertex(t,n),r=this.vertex(i,n),s=this.vertex(a,n)),0==wireframe?(this.data.indices.push(e),this.data.indices.push(r),this.data.indices.push(s)):(this.data.indices.push(e),this.data.indices.push(r),this.data.indices.push(r),this.data.indices.push(s),this.data.indices.push(s),this.data.indices.push(e)),this.append()}}processQuad(e){let t=e[0],i=e[1],a=e[2],n=e[3],r=cross([i[0]-t[0],i[1]-t[1],i[2]-t[2]],[a[0]-i[0],a[1]-i[1],a[2]-i[2]]),s=cross([a[0]-n[0],a[1]-n[1],a[2]-n[2]],[n[0]-t[0],n[1]-t[1],n[2]-t[2]]),o=unit([r[0]+s[0],r[1]+s[1],r[2]+s[2]]);if(!this.offscreen([t,i,a,n])){let e,r,s,l;this.color?(e=this.data.Vertex(t,o,this.color[0]),r=this.data.Vertex(i,o,this.color[1]),s=this.data.Vertex(a,o,this.color[2]),l=this.data.Vertex(n,o,this.color[3])):(e=this.vertex(t,o),r=this.vertex(i,o),s=this.vertex(a,o),l=this.vertex(n,o)),0==wireframe?(this.data.indices.push(e),this.data.indices.push(r),this.data.indices.push(s),this.data.indices.push(e),this.data.indices.push(s),this.data.indices.push(l)):(this.data.indices.push(e),this.data.indices.push(r),this.data.indices.push(r),this.data.indices.push(s),this.data.indices.push(s),this.data.indices.push(l),this.data.indices.push(l),this.data.indices.push(e)),this.append()}}curve(e,t,i,a,n){new BezierCurve([e[t],e[i],e[a],e[n]],0,materialIndex,this.Min,this.Max).render()}process(e){if(this.transparent&&1!=wireframe&&(materialIndex=this.color?-1-materialIndex:1+materialIndex),10==e.length)return this.process3(e);if(3==e.length)return this.processTriangle(e);if(4==e.length)return this.processQuad(e);if(1==wireframe)return this.curve(e,0,4,8,12),this.curve(e,12,13,14,15),this.curve(e,15,11,7,3),void this.curve(e,3,2,1,0);let t=e[0],i=e[3],a=e[12],n=e[15],r=this.normal(i,e[2],e[1],t,e[4],e[8],a);abs2(r)<this.epsilon&&(r=this.normal(i,e[2],e[1],t,e[13],e[14],n),abs2(r)<this.epsilon&&(r=this.normal(n,e[11],e[7],i,e[4],e[8],a)));let s=this.normal(t,e[4],e[8],a,e[13],e[14],n);abs2(s)<this.epsilon&&(s=this.normal(t,e[4],e[8],a,e[11],e[7],i),abs2(s)<this.epsilon&&(s=this.normal(i,e[2],e[1],t,e[13],e[14],n)));let o=this.normal(a,e[13],e[14],n,e[11],e[7],i);abs2(o)<this.epsilon&&(o=this.normal(a,e[13],e[14],n,e[2],e[1],t),abs2(o)<this.epsilon&&(o=this.normal(t,e[4],e[8],a,e[11],e[7],i)));let l=this.normal(n,e[11],e[7],i,e[2],e[1],t);if(abs2(l)<this.epsilon&&(l=this.normal(n,e[11],e[7],i,e[4],e[8],a),abs2(l)<this.epsilon&&(l=this.normal(a,e[13],e[14],n,e[2],e[1],t))),this.color){let h=this.color[0],c=this.color[1],d=this.color[2],m=this.color[3],f=this.data.Vertex(t,r,h),u=this.data.Vertex(a,s,c),p=this.data.Vertex(n,o,d),g=this.data.Vertex(i,l,m);this.Render(e,f,u,p,g,t,a,n,i,!1,!1,!1,!1,h,c,d,m)}else{let h=this.vertex(t,r),c=this.vertex(a,s),d=this.vertex(n,o),m=this.vertex(i,l);this.Render(e,h,c,d,m,t,a,n,i,!1,!1,!1,!1)}this.data.indices.length>0&&this.append()}append(){this.transparent?transparentData.append(this.data):this.color?colorData.append(this.data):materialData.append(this.data)}notRendered(){this.transparent?transparentData.rendered=!1:this.color?colorData.rendered=!1:materialData.rendered=!1}Render(e,t,i,a,n,r,s,o,l,h,c,d,m,f,u,p,g){let v=this.Distance(e);if(v[0]<this.res2&&v[1]<this.res2)this.offscreen([r,s,o])||(0==wireframe?(this.data.indices.push(t),this.data.indices.push(i),this.data.indices.push(a)):(this.data.indices.push(t),this.data.indices.push(i),this.data.indices.push(i),this.data.indices.push(a))),this.offscreen([r,o,l])||(0==wireframe?(this.data.indices.push(t),this.data.indices.push(a),this.data.indices.push(n)):(this.data.indices.push(a),this.data.indices.push(n),this.data.indices.push(n),this.data.indices.push(t)));else{if(this.offscreen(e))return;let x=e[0],w=e[3],M=e[12],b=e[15];if(v[0]<this.res2){let v=new Split3(x,e[1],e[2],w),T=new Split3(e[4],e[5],e[6],e[7]),S=new Split3(e[8],e[9],e[10],e[11]),R=new Split3(M,e[13],e[14],b),I=[x,v.m0,v.m3,v.m5,e[4],T.m0,T.m3,T.m5,e[8],S.m0,S.m3,S.m5,M,R.m0,R.m3,R.m5],A=[v.m5,v.m4,v.m2,w,T.m5,T.m4,T.m2,e[7],S.m5,S.m4,S.m2,e[11],R.m5,R.m4,R.m2,b],E=this.normal(I[12],I[13],I[14],I[15],I[11],I[7],I[3]);abs2(E)<=this.epsilon&&(E=this.normal(I[12],I[13],I[14],I[15],I[2],I[1],I[0]),abs2(E)<=this.epsilon&&(E=this.normal(I[0],I[4],I[8],I[12],I[11],I[7],I[3])));let P=this.normal(A[3],A[2],A[1],A[0],A[4],A[8],A[12]);abs2(P)<=this.epsilon&&(P=this.normal(A[3],A[2],A[1],A[0],A[13],A[14],A[15]),abs2(P)<=this.epsilon&&(P=this.normal(A[15],A[11],A[7],A[3],A[4],A[8],A[12])));let L=this.Epsilon,D=[.5*(s[0]+o[0]),.5*(s[1]+o[1]),.5*(s[2]+o[2])];if(!c)if(c=Straightness(M,e[13],e[14],b)<this.res2){let e=unit(this.differential(A[12],A[8],A[4],A[0]));D=[D[0]-L*e[0],D[1]-L*e[1],D[2]-L*e[2]]}else D=I[15];let y=[.5*(l[0]+r[0]),.5*(l[1]+r[1]),.5*(l[2]+r[2])];if(!m)if(m=Straightness(x,e[1],e[2],w)<this.res2){let e=unit(this.differential(I[3],I[7],I[11],I[15]));y=[y[0]-L*e[0],y[1]-L*e[1],y[2]-L*e[2]]}else y=A[0];if(f){let e=Array(4),v=Array(4);for(let t=0;t<4;++t)e[t]=.5*(u[t]+p[t]),v[t]=.5*(g[t]+f[t]);let x=this.data.Vertex(D,E,e),w=this.data.Vertex(y,P,v);this.Render(I,t,i,x,w,r,s,D,y,h,c,!1,m,f,u,e,v),this.Render(A,w,x,a,n,y,D,o,l,!1,c,d,m,v,e,p,g)}else{let e=this.vertex(D,E),f=this.vertex(y,P);this.Render(I,t,i,e,f,r,s,D,y,h,c,!1,m),this.Render(A,f,e,a,n,y,D,o,l,!1,c,d,m)}return}if(v[1]<this.res2){let v=new Split3(x,e[4],e[8],M),T=new Split3(e[1],e[5],e[9],e[13]),S=new Split3(e[2],e[6],e[10],e[14]),R=new Split3(w,e[7],e[11],b),I=[x,e[1],e[2],w,v.m0,T.m0,S.m0,R.m0,v.m3,T.m3,S.m3,R.m3,v.m5,T.m5,S.m5,R.m5],A=[v.m5,T.m5,S.m5,R.m5,v.m4,T.m4,S.m4,R.m4,v.m2,T.m2,S.m2,R.m2,M,e[13],e[14],b],E=this.normal(I[0],I[4],I[8],I[12],I[13],I[14],I[15]);abs2(E)<=this.epsilon&&(E=this.normal(I[0],I[4],I[8],I[12],I[11],I[7],I[3]),abs2(E)<=this.epsilon&&(E=this.normal(I[3],I[2],I[1],I[0],I[13],I[14],I[15])));let P=this.normal(A[15],A[11],A[7],A[3],A[2],A[1],A[0]);abs2(P)<=this.epsilon&&(P=this.normal(A[15],A[11],A[7],A[3],A[4],A[8],A[12]),abs2(P)<=this.epsilon&&(P=this.normal(A[12],A[13],A[14],A[15],A[2],A[1],A[0])));let L=this.Epsilon,D=[.5*(r[0]+s[0]),.5*(r[1]+s[1]),.5*(r[2]+s[2])];if(!h)if(h=Straightness(x,e[4],e[8],M)<this.res2){let e=unit(this.differential(A[0],A[1],A[2],A[3]));D=[D[0]-L*e[0],D[1]-L*e[1],D[2]-L*e[2]]}else D=I[12];let y=[.5*(o[0]+l[0]),.5*(o[1]+l[1]),.5*(o[2]+l[2])];if(!d)if(d=Straightness(b,e[11],e[7],w)<this.res2){let e=unit(this.differential(I[15],I[14],I[13],I[12]));y=[y[0]-L*e[0],y[1]-L*e[1],y[2]-L*e[2]]}else y=A[3];if(f){let e=Array(4),v=Array(4);for(let t=0;t<4;++t)e[t]=.5*(f[t]+u[t]),v[t]=.5*(p[t]+g[t]);let x=this.data.Vertex(D,E,e),w=this.data.Vertex(y,P,v);this.Render(I,t,x,w,n,r,D,y,l,h,!1,d,m,f,e,v,g),this.Render(A,x,i,a,w,D,s,o,y,h,c,d,!1,e,u,p,v)}else{let e=this.vertex(D,E),f=this.vertex(y,P);this.Render(I,t,e,f,n,r,D,y,l,h,!1,d,m),this.Render(A,e,i,a,f,D,s,o,y,h,c,d,!1)}return}let T=new Split3(x,e[1],e[2],w),S=new Split3(e[4],e[5],e[6],e[7]),R=new Split3(e[8],e[9],e[10],e[11]),I=new Split3(M,e[13],e[14],b),A=new Split3(x,e[4],e[8],M),E=new Split3(T.m0,S.m0,R.m0,I.m0),P=new Split3(T.m3,S.m3,R.m3,I.m3),L=new Split3(T.m5,S.m5,R.m5,I.m5),D=new Split3(T.m4,S.m4,R.m4,I.m4),y=new Split3(T.m2,S.m2,R.m2,I.m2),O=new Split3(w,e[7],e[11],b),B=[x,T.m0,T.m3,T.m5,A.m0,E.m0,P.m0,L.m0,A.m3,E.m3,P.m3,L.m3,A.m5,E.m5,P.m5,L.m5],N=[A.m5,E.m5,P.m5,L.m5,A.m4,E.m4,P.m4,L.m4,A.m2,E.m2,P.m2,L.m2,M,I.m0,I.m3,I.m5],z=[L.m5,D.m5,y.m5,O.m5,L.m4,D.m4,y.m4,O.m4,L.m2,D.m2,y.m2,O.m2,I.m5,I.m4,I.m2,b],_=[T.m5,T.m4,T.m2,w,L.m0,D.m0,y.m0,O.m0,L.m3,D.m3,y.m3,O.m3,L.m5,D.m5,y.m5,O.m5],C=B[15],V=this.normal(B[0],B[4],B[8],B[12],B[13],B[14],B[15]);abs2(V)<this.epsilon&&(V=this.normal(B[0],B[4],B[8],B[12],B[11],B[7],B[3]),abs2(V)<this.epsilon&&(V=this.normal(B[3],B[2],B[1],B[0],B[13],B[14],B[15])));let U=this.normal(N[12],N[13],N[14],N[15],N[11],N[7],N[3]);abs2(U)<this.epsilon&&(U=this.normal(N[12],N[13],N[14],N[15],N[2],N[1],N[0]),abs2(U)<this.epsilon&&(U=this.normal(N[0],N[4],N[8],N[12],N[11],N[7],N[3])));let H=this.normal(z[15],z[11],z[7],z[3],z[2],z[1],z[0]);abs2(H)<this.epsilon&&(H=this.normal(z[15],z[11],z[7],z[3],z[4],z[8],z[12]),abs2(H)<this.epsilon&&(H=this.normal(z[12],z[13],z[14],z[15],z[2],z[1],z[0])));let G=this.normal(_[3],_[2],_[1],_[0],_[4],_[8],_[12]);abs2(G)<this.epsilon&&(G=this.normal(_[3],_[2],_[1],_[0],_[13],_[14],_[15]),abs2(G)<this.epsilon&&(G=this.normal(_[15],_[11],_[7],_[3],_[4],_[8],_[12])));let F=this.normal(z[3],z[2],z[1],C,z[4],z[8],z[12]),X=this.Epsilon,W=[.5*(r[0]+s[0]),.5*(r[1]+s[1]),.5*(r[2]+s[2])];if(!h)if(h=Straightness(x,e[4],e[8],M)<this.res2){let e=unit(this.differential(N[0],N[1],N[2],N[3]));W=[W[0]-X*e[0],W[1]-X*e[1],W[2]-X*e[2]]}else W=B[12];let j=[.5*(s[0]+o[0]),.5*(s[1]+o[1]),.5*(s[2]+o[2])];if(!c)if(c=Straightness(M,e[13],e[14],b)<this.res2){let e=unit(this.differential(z[12],z[8],z[4],z[0]));j=[j[0]-X*e[0],j[1]-X*e[1],j[2]-X*e[2]]}else j=N[15];let Z=[.5*(o[0]+l[0]),.5*(o[1]+l[1]),.5*(o[2]+l[2])];if(!d)if(d=Straightness(b,e[11],e[7],w)<this.res2){let e=unit(this.differential(_[15],_[14],_[13],_[12]));Z=[Z[0]-X*e[0],Z[1]-X*e[1],Z[2]-X*e[2]]}else Z=z[3];let k=[.5*(l[0]+r[0]),.5*(l[1]+r[1]),.5*(l[2]+r[2])];if(!m)if(m=Straightness(x,e[1],e[2],w)<this.res2){let e=unit(this.differential(B[3],B[7],B[11],B[15]));k=[k[0]-X*e[0],k[1]-X*e[1],k[2]-X*e[2]]}else k=_[0];if(f){let e=Array(4),v=Array(4),x=Array(4),w=Array(4),M=Array(4);for(let t=0;t<4;++t)e[t]=.5*(f[t]+u[t]),v[t]=.5*(u[t]+p[t]),x[t]=.5*(p[t]+g[t]),w[t]=.5*(g[t]+f[t]),M[t]=.5*(e[t]+x[t]);let b=this.data.Vertex(W,V,e),T=this.data.Vertex(j,U,v),S=this.data.Vertex(Z,H,x),R=this.data.Vertex(k,G,w),I=this.data.Vertex(C,F,M);this.Render(B,t,b,I,R,r,W,C,k,h,!1,!1,m,f,e,M,w),this.Render(N,b,i,T,I,W,s,j,C,h,c,!1,!1,e,u,v,M),this.Render(z,I,T,a,S,C,j,o,Z,!1,c,d,!1,M,v,p,x),this.Render(_,R,I,S,n,k,C,Z,l,!1,!1,d,m,w,M,x,g)}else{let e=this.vertex(W,V),f=this.vertex(j,U),u=this.vertex(Z,H),p=this.vertex(k,G),g=this.vertex(C,F);this.Render(B,t,e,g,p,r,W,C,k,h,!1,!1,m),this.Render(N,e,i,f,g,W,s,j,C,h,c,!1,!1),this.Render(z,g,f,a,u,C,j,o,Z,!1,c,d,!1),this.Render(_,p,g,u,n,k,C,Z,l,!1,!1,d,m)}}}process3(e){if(1==wireframe)return this.curve(e,0,1,3,6),this.curve(e,6,7,8,9),void this.curve(e,9,5,2,0);let t=e[0],i=e[6],a=e[9],n=this.normal(a,e[5],e[2],t,e[1],e[3],i),r=this.normal(t,e[1],e[3],i,e[7],e[8],a),s=this.normal(i,e[7],e[8],a,e[5],e[2],t);if(this.color){let o=this.color[0],l=this.color[1],h=this.color[2],c=this.data.Vertex(t,n,o),d=this.data.Vertex(i,r,l),m=this.data.Vertex(a,s,h);this.Render3(e,c,d,m,t,i,a,!1,!1,!1,o,l,h)}else{let o=this.vertex(t,n),l=this.vertex(i,r),h=this.vertex(a,s);this.Render3(e,o,l,h,t,i,a,!1,!1,!1)}this.data.indices.length>0&&this.append()}Render3(e,t,i,a,n,r,s,o,l,h,c,d,m){if(this.Distance3(e)<this.res2)this.offscreen([n,r,s])||(0==wireframe?(this.data.indices.push(t),this.data.indices.push(i),this.data.indices.push(a)):(this.data.indices.push(t),this.data.indices.push(i),this.data.indices.push(i),this.data.indices.push(a),this.data.indices.push(a),this.data.indices.push(t)));else{if(this.offscreen(e))return;let f=e[0],u=e[1],p=e[2],g=e[3],v=e[4],x=e[5],w=e[6],M=e[7],b=e[8],T=e[9],S=[.5*(T[0]+x[0]),.5*(T[1]+x[1]),.5*(T[2]+x[2])],R=[.5*(T[0]+b[0]),.5*(T[1]+b[1]),.5*(T[2]+b[2])],I=[.5*(x[0]+p[0]),.5*(x[1]+p[1]),.5*(x[2]+p[2])],A=[.5*(b[0]+v[0]),.5*(b[1]+v[1]),.5*(b[2]+v[2])],E=[.5*(b[0]+M[0]),.5*(b[1]+M[1]),.5*(b[2]+M[2])],P=[.5*(p[0]+v[0]),.5*(p[1]+v[1]),.5*(p[2]+v[2])],L=[.5*(p[0]+f[0]),.5*(p[1]+f[1]),.5*(p[2]+f[2])],D=[.5*(v[0]+g[0]),.5*(v[1]+g[1]),.5*(v[2]+g[2])],y=[.5*(M[0]+w[0]),.5*(M[1]+w[1]),.5*(M[2]+w[2])],O=[.5*(f[0]+u[0]),.5*(f[1]+u[1]),.5*(f[2]+u[2])],B=[.5*(u[0]+g[0]),.5*(u[1]+g[1]),.5*(u[2]+g[2])],N=[.5*(g[0]+w[0]),.5*(g[1]+w[1]),.5*(g[2]+w[2])],z=[.5*(S[0]+I[0]),.5*(S[1]+I[1]),.5*(S[2]+I[2])],_=[.5*(R[0]+E[0]),.5*(R[1]+E[1]),.5*(R[2]+E[2])],C=[.5*(I[0]+L[0]),.5*(I[1]+L[1]),.5*(I[2]+L[2])],V=[.5*A[0]+.25*(v[0]+u[0]),.5*A[1]+.25*(v[1]+u[1]),.5*A[2]+.25*(v[2]+u[2])],U=[.5*(E[0]+y[0]),.5*(E[1]+y[1]),.5*(E[2]+y[2])],H=[.5*P[0]+.25*(v[0]+M[0]),.5*P[1]+.25*(v[1]+M[1]),.5*P[2]+.25*(v[2]+M[2])],G=[.25*(x[0]+v[0])+.5*D[0],.25*(x[1]+v[1])+.5*D[1],.25*(x[2]+v[2])+.5*D[2]],F=[.5*(O[0]+B[0]),.5*(O[1]+B[1]),.5*(O[2]+B[2])],X=[.5*(B[0]+N[0]),.5*(B[1]+N[1]),.5*(B[2]+N[2])],W=[.5*(H[0]+F[0]),.5*(H[1]+F[1]),.5*(H[2]+F[2])],j=[.5*(H[0]+X[0]),.5*(H[1]+X[1]),.5*(H[2]+X[2])],Z=[.5*(F[0]+X[0]),.5*(F[1]+X[1]),.5*(F[2]+X[2])],k=[.5*(G[0]+U[0]),.5*(G[1]+U[1]),.5*(G[2]+U[2])],Y=[.5*(_[0]+G[0]),.5*(_[1]+G[1]),.5*(_[2]+G[2])],q=[.5*(_[0]+U[0]),.5*(_[1]+U[1]),.5*(_[2]+U[2])],$=[.5*(z[0]+V[0]),.5*(z[1]+V[1]),.5*(z[2]+V[2])],K=[.5*(C[0]+V[0]),.5*(C[1]+V[1]),.5*(C[2]+V[2])],Q=[.5*(z[0]+C[0]),.5*(z[1]+C[1]),.5*(z[2]+C[2])],J=[f,O,L,F,[.5*(P[0]+O[0]),.5*(P[1]+O[1]),.5*(P[2]+O[2])],C,Z,W,K,Q],ee=[Z,X,j,N,[.5*(D[0]+y[0]),.5*(D[1]+y[1]),.5*(D[2]+y[2])],k,w,y,U,q],te=[Q,$,z,Y,[.5*(S[0]+A[0]),.5*(S[1]+A[1]),.5*(S[2]+A[2])],S,q,_,R,T],ie=[q,Y,k,$,[.25*(I[0]+E[0]+B[0]+v[0]),.25*(I[1]+E[1]+B[1]+v[1]),.25*(I[2]+E[2]+B[2]+v[2])],j,Q,K,W,Z],ae=this.normal(Z,j,k,q,Y,$,Q),ne=this.normal(q,Y,$,Q,K,W,Z),re=this.normal(Q,K,W,Z,j,k,q),se=this.Epsilon,oe=[.5*(r[0]+s[0]),.5*(r[1]+s[1]),.5*(r[2]+s[2])];if(!o)if(o=Straightness(w,M,b,T)<this.res2){let e=unit(this.sumdifferential(ie[0],ie[2],ie[5],ie[9],ie[1],ie[3],ie[6]));oe=[oe[0]-se*e[0],oe[1]-se*e[1],oe[2]-se*e[2]]}else oe=q;let le=[.5*(s[0]+n[0]),.5*(s[1]+n[1]),.5*(s[2]+n[2])];if(!l)if(l=Straightness(f,p,x,T)<this.res2){let e=unit(this.sumdifferential(ie[6],ie[3],ie[1],ie[0],ie[7],ie[8],ie[9]));le=[le[0]-se*e[0],le[1]-se*e[1],le[2]-se*e[2]]}else le=Q;let he=[.5*(n[0]+r[0]),.5*(n[1]+r[1]),.5*(n[2]+r[2])];if(!h)if(h=Straightness(f,u,g,w)<this.res2){let e=unit(this.sumdifferential(ie[9],ie[8],ie[7],ie[6],ie[5],ie[2],ie[0]));he=[he[0]-se*e[0],he[1]-se*e[1],he[2]-se*e[2]]}else he=Z;if(c){let e=Array(4),f=Array(4),u=Array(4);for(let t=0;t<4;++t)e[t]=.5*(d[t]+m[t]),f[t]=.5*(m[t]+c[t]),u[t]=.5*(c[t]+d[t]);let p=this.data.Vertex(oe,ae,e),g=this.data.Vertex(le,ne,f),v=this.data.Vertex(he,re,u);this.Render3(J,t,v,g,n,he,le,!1,l,h,c,u,f),this.Render3(ee,v,i,p,he,r,oe,o,!1,h,u,d,e),this.Render3(te,g,p,a,le,oe,s,o,l,!1,f,e,m),this.Render3(ie,p,g,v,oe,le,he,!1,!1,!1,e,f,u)}else{let e=this.vertex(oe,ae),c=this.vertex(le,ne),d=this.vertex(he,re);this.Render3(J,t,d,c,n,he,le,!1,l,h),this.Render3(ee,d,i,e,he,r,oe,o,!1,h),this.Render3(te,c,e,a,le,oe,s,o,l,!1),this.Render3(ie,e,c,d,oe,le,he,!1,!1,!1)}}}Distance(e){let t=e[0],i=e[3],a=e[12],n=e[15],r=Flatness(t,a,i,n);r=Math.max(Straightness(t,e[4],e[8],a)),r=Math.max(r,Straightness(e[1],e[5],e[9],e[13])),r=Math.max(r,Straightness(i,e[7],e[11],n)),r=Math.max(r,Straightness(e[2],e[6],e[10],e[14]));let s=Flatness(t,i,a,n);return s=Math.max(s,Straightness(t,e[1],e[2],i)),s=Math.max(s,Straightness(e[4],e[5],e[6],e[7])),s=Math.max(s,Straightness(e[8],e[9],e[10],e[11])),s=Math.max(s,Straightness(a,e[13],e[14],n)),[r,s]}Distance3(e){let t=e[0],i=e[4],a=e[6],n=e[9],r=abs2([(t[0]+a[0]+n[0])*(1/3)-i[0],(t[1]+a[1]+n[1])*(1/3)-i[1],(t[2]+a[2]+n[2])*(1/3)-i[2]]);return r=Math.max(r,Straightness(t,e[1],e[3],a)),r=Math.max(r,Straightness(t,e[2],e[5],n)),Math.max(r,Straightness(a,e[7],e[8],n))}differential(e,t,i,a){let n=[3*(t[0]-e[0]),3*(t[1]-e[1]),3*(t[2]-e[2])];return abs2(n)>this.epsilon?n:(n=bezierPP(e,t,i),abs2(n)>this.epsilon?n:bezierPPP(e,t,i,a))}sumdifferential(e,t,i,a,n,r,s){let o=this.differential(e,t,i,a),l=this.differential(e,n,r,s);return[o[0]+l[0],o[1]+l[1],o[2]+l[2]]}normal(e,t,i,a,n,r,s){let o=3*(n[0]-a[0]),l=3*(n[1]-a[1]),h=3*(n[2]-a[2]),c=3*(i[0]-a[0]),d=3*(i[1]-a[1]),m=3*(i[2]-a[2]),f=[l*m-h*d,h*c-o*m,o*d-l*c];if(abs2(f)>this.epsilon)return f;let u=[c,d,m],p=[o,l,h],g=bezierPP(a,i,t),v=bezierPP(a,n,r),x=cross(v,u),w=cross(p,g);if(f=[x[0]+w[0],x[1]+w[1],x[2]+w[2]],abs2(f)>this.epsilon)return f;let M=bezierPPP(a,i,t,e),b=bezierPPP(a,n,r,s);x=cross(p,M),w=cross(b,u);let T=cross(v,g);return f=[x[0]+w[0]+T[0],x[1]+w[1]+T[1],x[2]+w[2]+T[2]],abs2(f)>this.epsilon?f:(x=cross(b,g),w=cross(v,M),f=[x[0]+w[0],x[1]+w[1],x[2]+w[2]],abs2(f)>this.epsilon?f:cross(b,M))}}class BezierCurve extends Geometry{constructor(e,t,i,a,n){super(),this.controlpoints=e,this.CenterIndex=t,this.MaterialIndex=i,this.Min=a,this.Max=n}setMaterialIndex(){this.setMaterial(material1Data,drawMaterial1)}processLine(e){let t=e[0],i=e[1];if(!this.offscreen([t,i])){let e=[0,0,1];this.data.indices.push(this.data.vertex(t,e)),this.data.indices.push(this.data.vertex(i,e)),this.append()}}process(e){if(2==e.length)return this.processLine(e);let t=e[0],i=e[1],a=e[2],n=e[3],r=this.normal(bezierP(t,i),bezierPP(t,i,a)),s=this.normal(bezierP(a,n),bezierPP(n,a,i)),o=this.data.vertex(t,r),l=this.data.vertex(n,s);this.Render(e,o,l),this.data.indices.length>0&&this.append()}append(){material1Data.append(this.data)}notRendered(){material1Data.rendered=!1}Render(e,t,i){let a=e[0],n=e[1],r=e[2],s=e[3];if(Straightness(a,n,r,s)<this.res2)this.offscreen([a,s])||(this.data.indices.push(t),this.data.indices.push(i));else{if(this.offscreen(e))return;let o=[.5*(a[0]+n[0]),.5*(a[1]+n[1]),.5*(a[2]+n[2])],l=[.5*(n[0]+r[0]),.5*(n[1]+r[1]),.5*(n[2]+r[2])],h=[.5*(r[0]+s[0]),.5*(r[1]+s[1]),.5*(r[2]+s[2])],c=[.5*(o[0]+l[0]),.5*(o[1]+l[1]),.5*(o[2]+l[2])],d=[.5*(l[0]+h[0]),.5*(l[1]+h[1]),.5*(l[2]+h[2])],m=[.5*(c[0]+d[0]),.5*(c[1]+d[1]),.5*(c[2]+d[2])],f=[a,o,c,m],u=[m,d,h,s],p=this.normal(bezierPh(a,n,r,s),bezierPPh(a,n,r,s)),g=this.data.vertex(m,p);this.Render(f,t,g),this.Render(u,g,i)}}normal(e,t){let i=dot(e,e),a=dot(e,t);return[i*t[0]-a*e[0],i*t[1]-a*e[1],i*t[2]-a*e[2]]}}class Pixel extends Geometry{constructor(e,t,i,a,n){super(),this.controlpoint=e,this.width=t,this.CenterIndex=0,this.MaterialIndex=i,this.Min=a,this.Max=n}setMaterialIndex(){this.setMaterial(material0Data,drawMaterial0)}process(e){this.data.indices.push(this.data.vertex0(this.controlpoint,this.width)),this.append()}append(){material0Data.append(this.data)}notRendered(){material0Data.rendered=!1}}class Triangles extends Geometry{constructor(e,t,i,a){super(),this.CenterIndex=e,this.MaterialIndex=t,this.Min=i,this.Max=a,this.controlpoints=Positions,this.Normals=Normals,this.Colors=Colors,this.Indices=Indices,Positions=[],Normals=[],Colors=[],Indices=[],this.transparent=Materials[this.MaterialIndex].diffuse[3]<1}setMaterialIndex(){this.transparent?this.setMaterial(transparentData,drawTransparent):this.setMaterial(triangleData,drawTriangle)}process(e){this.data.vertices=new Array(6*e.length),materialIndex=this.Colors.length>0?-1-materialIndex:1+materialIndex;for(let t=0,i=this.Indices.length;t<i;++t){let i=this.Indices[t],a=i[0],n=e[a[0]],r=e[a[1]],s=e[a[2]];if(!this.offscreen([n,r,s])){let e=i.length>1?i[1]:a;if(e&&0!=e.length||(e=a),this.Colors.length>0){let t=i.length>2?i[2]:a;t&&0!=t.length||(t=a);let o=this.Colors[t[0]],l=this.Colors[t[1]],h=this.Colors[t[2]];this.transparent|=o[3]+l[3]+h[3]<765,0==wireframe?(this.data.iVertex(a[0],n,this.Normals[e[0]],o),this.data.iVertex(a[1],r,this.Normals[e[1]],l),this.data.iVertex(a[2],s,this.Normals[e[2]],h)):(this.data.iVertex(a[0],n,this.Normals[e[0]],o),this.data.iVertex(a[1],r,this.Normals[e[1]],l),this.data.iVertex(a[1],r,this.Normals[e[1]],l),this.data.iVertex(a[2],s,this.Normals[e[2]],h),this.data.iVertex(a[2],s,this.Normals[e[2]],h),this.data.iVertex(a[0],n,this.Normals[e[0]],o))}else 0==wireframe?(this.data.iVertex(a[0],n,this.Normals[e[0]]),this.data.iVertex(a[1],r,this.Normals[e[1]]),this.data.iVertex(a[2],s,this.Normals[e[2]])):(this.data.iVertex(a[0],n,this.Normals[e[0]]),this.data.iVertex(a[1],r,this.Normals[e[1]]),this.data.iVertex(a[1],r,this.Normals[e[1]]),this.data.iVertex(a[2],s,this.Normals[e[2]]),this.data.iVertex(a[2],s,this.Normals[e[2]]),this.data.iVertex(a[0],n,this.Normals[e[0]]))}}this.data.nvertices=e.length,this.data.indices.length>0&&this.append()}append(){this.transparent?transparentData.append(this.data):triangleData.append(this.data)}notRendered(){this.transparent?transparentData.rendered=!1:triangleData.rendered=!1}}function redrawScene(){initProjection(),setProjection(),remesh=!0,drawScene()}function home(){mat4.identity(rotMat),redrawScene()}let positionAttribute=0,normalAttribute=1,materialAttribute=2,colorAttribute=3,widthAttribute=4;function initShader(e=[]){let t=getShader(gl,vertex,gl.VERTEX_SHADER,e),i=getShader(gl,fragment,gl.FRAGMENT_SHADER,e),a=gl.createProgram();return gl.attachShader(a,t),gl.attachShader(a,i),gl.bindAttribLocation(a,positionAttribute,"position"),gl.bindAttribLocation(a,normalAttribute,"normal"),gl.bindAttribLocation(a,materialAttribute,"materialIndex"),gl.bindAttribLocation(a,colorAttribute,"color"),gl.bindAttribLocation(a,widthAttribute,"width"),gl.linkProgram(a),gl.getProgramParameter(a,gl.LINK_STATUS)||alert("Could not initialize shaders"),a}class Split3{constructor(e,t,i,a){this.m0=[.5*(e[0]+t[0]),.5*(e[1]+t[1]),.5*(e[2]+t[2])];let n=.5*(t[0]+i[0]),r=.5*(t[1]+i[1]),s=.5*(t[2]+i[2]);this.m2=[.5*(i[0]+a[0]),.5*(i[1]+a[1]),.5*(i[2]+a[2])],this.m3=[.5*(this.m0[0]+n),.5*(this.m0[1]+r),.5*(this.m0[2]+s)],this.m4=[.5*(n+this.m2[0]),.5*(r+this.m2[1]),.5*(s+this.m2[2])],this.m5=[.5*(this.m3[0]+this.m4[0]),.5*(this.m3[1]+this.m4[1]),.5*(this.m3[2]+this.m4[2])]}}function unit(e){let t=1/(Math.sqrt(e[0]*e[0]+e[1]*e[1]+e[2]*e[2])||1);return[e[0]*t,e[1]*t,e[2]*t]}function abs2(e){return e[0]*e[0]+e[1]*e[1]+e[2]*e[2]}function dot(e,t){return e[0]*t[0]+e[1]*t[1]+e[2]*t[2]}function cross(e,t){return[e[1]*t[2]-e[2]*t[1],e[2]*t[0]-e[0]*t[2],e[0]*t[1]-e[1]*t[0]]}function bezierP(e,t){return[t[0]-e[0],t[1]-e[1],t[2]-e[2]]}function bezierPP(e,t,i){return[3*(e[0]+i[0])-6*t[0],3*(e[1]+i[1])-6*t[1],3*(e[2]+i[2])-6*t[2]]}function bezierPPP(e,t,i,a){return[a[0]-e[0]+3*(t[0]-i[0]),a[1]-e[1]+3*(t[1]-i[1]),a[2]-e[2]+3*(t[2]-i[2])]}function bezierPh(e,t,i,a){return[i[0]+a[0]-e[0]-t[0],i[1]+a[1]-e[1]-t[1],i[2]+a[2]-e[2]-t[2]]}function bezierPPh(e,t,i,a){return[3*e[0]-5*t[0]+i[0]+a[0],3*e[1]-5*t[1]+i[1]+a[1],3*e[2]-5*t[2]+i[2]+a[2]]}function Straightness(e,t,i,a){let n=[1/3*(a[0]-e[0]),1/3*(a[1]-e[1]),1/3*(a[2]-e[2])];return Math.max(abs2([t[0]-n[0]-e[0],t[1]-n[1]-e[1],t[2]-n[2]-e[2]]),abs2([a[0]-n[0]-i[0],a[1]-n[1]-i[1],a[2]-n[2]-i[2]]))}function Flatness(e,t,i,a){let n=[t[0]-e[0],t[1]-e[1],t[2]-e[2]],r=[a[0]-i[0],a[1]-i[1],a[2]-i[2]];return Math.max(abs2(cross(n,unit(r))),abs2(cross(r,unit(n))))/9}function corners(e,t){return[e,[e[0],e[1],t[2]],[e[0],t[1],e[2]],[e[0],t[1],t[2]],[t[0],e[1],e[2]],[t[0],e[1],t[2]],[t[0],t[1],e[2]],t]}function minbound(e){return[Math.min(e[0][0],e[1][0],e[2][0],e[3][0],e[4][0],e[5][0],e[6][0],e[7][0]),Math.min(e[0][1],e[1][1],e[2][1],e[3][1],e[4][1],e[5][1],e[6][1],e[7][1]),Math.min(e[0][2],e[1][2],e[2][2],e[3][2],e[4][2],e[5][2],e[6][2],e[7][2])]}function maxbound(e){return[Math.max(e[0][0],e[1][0],e[2][0],e[3][0],e[4][0],e[5][0],e[6][0],e[7][0]),Math.max(e[0][1],e[1][1],e[2][1],e[3][1],e[4][1],e[5][1],e[6][1],e[7][1]),Math.max(e[0][2],e[1][2],e[2][2],e[3][2],e[4][2],e[5][2],e[6][2],e[7][2])]}function COBTarget(e,t){mat4.fromTranslation(T,[center.x,center.y,center.z]),mat4.invert(cjMatInv,T),mat4.multiply(e,t,cjMatInv),mat4.multiply(e,T,e)}function setUniforms(e,t){let i=t==pixelShader;gl.useProgram(t),gl.enableVertexAttribArray(positionAttribute),i&&gl.enableVertexAttribArray(widthAttribute);let a=!i&&Lights.length>0;if(a&&gl.enableVertexAttribArray(normalAttribute),gl.enableVertexAttribArray(materialAttribute),t.projViewMatUniform=gl.getUniformLocation(t,"projViewMat"),t.viewMatUniform=gl.getUniformLocation(t,"viewMat"),t.normMatUniform=gl.getUniformLocation(t,"normMat"),t!=colorShader&&t!=transparentShader||gl.enableVertexAttribArray(colorAttribute),a)for(let e=0;e<Lights.length;++e)Lights[e].setUniform(t,e);for(let i=0;i<e.materials.length;++i)e.materials[i].setUniform(t,i);gl.uniformMatrix4fv(t.projViewMatUniform,!1,projViewMat),gl.uniformMatrix4fv(t.viewMatUniform,!1,viewMat),gl.uniformMatrix3fv(t.normMatUniform,!1,normMat)}function handleMouseDown(e){zoomEnabled||enableZoom(),mouseDownOrTouchActive=!0,lastMouseX=e.clientX,lastMouseY=e.clientY}let pinchStart,touchStartTime,pinch=!1;function pinchDistance(e){return Math.hypot(e[0].pageX-e[1].pageX,e[0].pageY-e[1].pageY)}function handleTouchStart(e){e.preventDefault(),zoomEnabled||enableZoom();let t=e.targetTouches;swipe=rotate=pinch=!1,zooming||(1!=t.length||mouseDownOrTouchActive||(touchStartTime=(new Date).getTime(),touchId=t[0].identifier,lastMouseX=t[0].pageX,lastMouseY=t[0].pageY),2!=t.length||mouseDownOrTouchActive||(touchId=t[0].identifier,pinchStart=pinchDistance(t),pinch=!0))}function handleMouseUpOrTouchEnd(e){mouseDownOrTouchActive=!1}function rotateScene(e,t,i,a,n){if(e==i&&t==a)return;let[r,s]=arcball([e,-t],[i,-a]);mat4.fromRotation(T,2*n*ArcballFactor*r/Zoom,s),mat4.multiply(rotMat,T,rotMat)}function shiftScene(e,t,i,a){let n=1/Zoom;shift.x+=(i-e)*n*halfCanvasWidth,shift.y-=(a-t)*n*halfCanvasHeight}function panScene(e,t,i,a){orthographic?shiftScene(e,t,i,a):(center.x+=(i-e)*(viewParam.xmax-viewParam.xmin),center.y-=(a-t)*(viewParam.ymax-viewParam.ymin))}function updateViewMatrix(){COBTarget(viewMat,rotMat),mat4.translate(viewMat,viewMat,[center.x,center.y,0]),mat3.fromMat4(viewMat3,viewMat),mat3.invert(normMat,viewMat3),mat4.multiply(projViewMat,projMat,viewMat)}function capzoom(){let e=Math.sqrt(Number.MAX_VALUE),t=1/e;Zoom<=t&&(Zoom=t),Zoom>=e&&(Zoom=e),(1.5*Zoom<lastZoom||Zoom>1.5*lastZoom)&&(remesh=!0,lastZoom=Zoom)}function zoomImage(e){let t=zoomStep*halfCanvasHeight*e;const i=Math.log(.1*Number.MAX_VALUE)/Math.log(zoomFactor);Math.abs(t)<i&&(Zoom*=zoomFactor**t,capzoom())}function normMouse(e){let t=e[0],i=e[1],a=Math.hypot(t,i);return a>1&&(denom=1/a,t*=denom,i*=denom),[t,i,Math.sqrt(Math.max(1-i*i-t*t,0))]}function arcball(e,t){let i=normMouse(e),a=normMouse(t),n=dot(i,a);return[n>1?0:n<-1?pi:Math.acos(n),unit(cross(i,a))]}function zoomScene(e,t,i,a){zoomImage(t-a)}const DRAGMODE_ROTATE=1,DRAGMODE_SHIFT=2,DRAGMODE_ZOOM=3,DRAGMODE_PAN=4;function processDrag(e,t,i,a=1){let n;switch(i){case 1:n=rotateScene;break;case 2:n=shiftScene;break;case 3:n=zoomScene;break;case 4:n=panScene;break;default:n=(e,t,i,a)=>{}}n((lastMouseX-halfCanvasWidth)/halfCanvasWidth,(lastMouseY-halfCanvasHeight)/halfCanvasHeight,(e-halfCanvasWidth)/halfCanvasWidth,(t-halfCanvasHeight)/halfCanvasHeight,a),lastMouseX=e,lastMouseY=t,setProjection(),drawScene()}let zoomEnabled=0;function enableZoom(){zoomEnabled=1,canvas.addEventListener("wheel",handleMouseWheel,!1)}function disableZoom(){zoomEnabled=0,canvas.removeEventListener("wheel",handleMouseWheel,!1)}function handleKey(e){if(zoomEnabled||enableZoom(),embedded&&zoomEnabled&&27==e.keyCode)return void disableZoom();let t=[];switch(e.key){case"x":t=[1,0,0];break;case"y":t=[0,1,0];break;case"z":t=[0,0,1];break;case"h":home();break;case"m":++wireframe,3==wireframe&&(wireframe=0),2!=wireframe&&(embedded||deleteShaders(),initShaders(ibl)),remesh=!0,drawScene();break;case"+":case"=":case">":expand();break;case"-":case"_":case"<":shrink()}t.length>0&&(mat4.rotate(rotMat,rotMat,.1,t),updateViewMatrix(),drawScene())}function setZoom(){capzoom(),setProjection(),drawScene()}function handleMouseWheel(e){e.preventDefault(),e.deltaY<0?Zoom*=zoomFactor:Zoom/=zoomFactor,setZoom()}function handleMouseMove(e){if(!mouseDownOrTouchActive)return;let t,i=e.clientX,a=e.clientY;t=e.getModifierState("Control")?2:e.getModifierState("Shift")?3:e.getModifierState("Alt")?4:1,processDrag(i,a,t)}let zooming=!1,swipe=!1,rotate=!1;function handleTouchMove(e){if(e.preventDefault(),zooming)return;let t=e.targetTouches;if(!pinch&&1==t.length&&touchId==t[0].identifier){let e=t[0].pageX,i=t[0].pageY,a=e-lastMouseX,n=i-lastMouseY,r=a*a+n*n<=shiftHoldDistance*shiftHoldDistance;if(r&&!swipe&&!rotate&&(new Date).getTime()-touchStartTime>shiftWaitTime&&(navigator.vibrate&&window.navigator.vibrate(vibrateTime),swipe=!0),swipe)processDrag(e,i,2);else if(!r){rotate=!0,processDrag(t[0].pageX,t[0].pageY,1,.5)}}if(pinch&&!swipe&&2==t.length&&touchId==t[0].identifier){let e=pinchDistance(t),i=e-pinchStart;zooming=!0,i*=zoomPinchFactor,i>zoomPinchCap&&(i=zoomPinchCap),i<-zoomPinchCap&&(i=-zoomPinchCap),zoomImage(i/size2),pinchStart=e,swipe=rotate=zooming=!1,setProjection(),drawScene()}}let pixelShader,materialShader,colorShader,transparentShader,zbuffer=[];function transformVertices(e){let t=viewMat[2],i=viewMat[6],a=viewMat[10];zbuffer.length=e.length;for(let n=0;n<e.length;++n){let r=6*n;zbuffer[n]=t*e[r]+i*e[r+1]+a*e[r+2]}}function drawMaterial0(){drawBuffer(material0Data,pixelShader),material0Data.clear()}function drawMaterial1(){drawBuffer(material1Data,materialShader),material1Data.clear()}function drawMaterial(){drawBuffer(materialData,materialShader),materialData.clear()}function drawColor(){drawBuffer(colorData,colorShader),colorData.clear()}function drawTriangle(){drawBuffer(triangleData,transparentShader),triangleData.rendered=!1,triangleData.clear()}function drawTransparent(){let e=transparentData.indices;if(wireframe>0)return drawBuffer(transparentData,transparentShader,e),void transparentData.clear();if(e.length>0){transformVertices(transparentData.vertices);let t=e.length/3,i=Array(t).fill().map((e,t)=>t);i.sort((function(t,i){let a=3*t;Ia=e[a],Ib=e[a+1],Ic=e[a+2];let n=3*i;return IA=e[n],IB=e[n+1],IC=e[n+2],zbuffer[Ia]+zbuffer[Ib]+zbuffer[Ic]<zbuffer[IA]+zbuffer[IB]+zbuffer[IC]?-1:1}));let a=Array(e.length);for(let n=0;n<t;++n){let t=3*i[n];a[3*n]=e[t],a[3*n+1]=e[t+1],a[3*n+2]=e[t+2]}gl.depthMask(!1),drawBuffer(transparentData,transparentShader,a),transparentData.rendered=!1,gl.depthMask(!0)}transparentData.clear()}function drawBuffers(){drawMaterial0(),drawMaterial1(),drawMaterial(),drawColor(),drawTriangle(),drawTransparent(),requestAnimationFrame(drawBuffers)}function drawScene(){embedded&&(offscreen.width=canvasWidth,offscreen.height=canvasHeight,setViewport()),gl.clearColor(Background[0],Background[1],Background[2],Background[3]),gl.clear(gl.COLOR_BUFFER_BIT|gl.DEPTH_BUFFER_BIT);for(let e=0;e<P.length;++e)P[e].render();drawBuffers(),embedded&&(context.clearRect(0,0,canvasWidth,canvasHeight),context.drawImage(offscreen,0,0)),0==wireframe&&(remesh=!1)}function setDimensions(e,t,i,a){let n=e/t,r=1/Zoom,s=(i/e+viewportShift[0])*Zoom,o=(a/t+viewportShift[1])*Zoom;if(orthographic){let e=maxBound[0]-minBound[0],t=maxBound[1]-minBound[1];if(e<t*n){let e=.5*t*n*r,i=2*e*s,a=t*r*o;viewParam.xmin=-e-i,viewParam.xmax=e-i,viewParam.ymin=minBound[1]*r-a,viewParam.ymax=maxBound[1]*r-a}else{let t=.5*e/(n*Zoom),i=e*r*s,a=2*t*o;viewParam.xmin=minBound[0]*r-i,viewParam.xmax=maxBound[0]*r-i,viewParam.ymin=-t-a,viewParam.ymax=t-a}}else{let e=H*r,t=e*n,i=2*t*s,a=2*e*o;viewParam.xmin=-t-i,viewParam.xmax=t-i,viewParam.ymin=-e-a,viewParam.ymax=e-a}}function setProjection(){setDimensions(canvasWidth,canvasHeight,shift.x,shift.y),(orthographic?mat4.ortho:mat4.frustum)(projMat,viewParam.xmin,viewParam.xmax,viewParam.ymin,viewParam.ymax,-viewParam.zmax,-viewParam.zmin),updateViewMatrix()}function initProjection(){H=-Math.tan(.5*angleOfView)*maxBound[2],center.x=center.y=0,center.z=.5*(minBound[2]+maxBound[2]),lastZoom=Zoom=zoom0,viewParam.zmin=minBound[2],viewParam.zmax=maxBound[2],shift.x=shift.y=0}function setViewport(){gl.viewportWidth=canvasWidth,gl.viewportHeight=canvasHeight,gl.viewport(.5*(canvas.width-canvasWidth),.5*(canvas.height-canvasHeight),canvasWidth,canvasHeight),gl.scissor(0,0,canvas.width,canvas.height)}function setCanvas(){embedded&&(canvas.width=offscreen.width=canvasWidth,canvas.height=offscreen.height=canvasHeight),size2=Math.hypot(canvasWidth,canvasHeight),halfCanvasWidth=.5*canvas.width,halfCanvasHeight=.5*canvas.height,ArcballFactor=1+8*Math.hypot(viewportMargin[0],viewportMargin[1])/size2}function setsize(e,t){e>maxViewportWidth&&(e=maxViewportWidth),t>maxViewportHeight&&(t=maxViewportHeight),shift.x*=e/canvasWidth,shift.y*=t/canvasHeight,canvasWidth=e,canvasHeight=t,setCanvas(),setViewport(),setProjection(),remesh=!0}function resize(){if(zoom0=initialZoom,absolute&&!embedded)canvasWidth=canvasWidth0*window.devicePixelRatio,canvasHeight=canvasHeight0*window.devicePixelRatio;else{let e=canvasWidth0/canvasHeight0;canvasWidth=Math.max(window.innerWidth-10,10),canvasHeight=Math.max(window.innerHeight-10,10),!orthographic&&canvasWidth<canvasHeight*e&&(zoom0*=canvasWidth/(canvasHeight*e))}canvas.width=canvasWidth,canvas.height=canvasHeight;window.innerWidth,window.innerHeight;viewportShift[0]/=zoom0,viewportShift[1]/=zoom0,setsize(canvasWidth,canvasHeight),redrawScene()}function expand(){Zoom*=zoomFactor,setZoom()}function shrink(){Zoom/=zoomFactor,setZoom()}class Align{constructor(e,t){if(this.center=e,t){let e=t[0],i=t[1];this.ct=Math.cos(e),this.st=Math.sin(e),this.cp=Math.cos(i),this.sp=Math.sin(i)}}T0(e){return[e[0]+this.center[0],e[1]+this.center[1],e[2]+this.center[2]]}T(e){let t=e[0],i=e[1],a=e[2],n=t*this.ct+a*this.st;return[n*this.cp-i*this.sp+this.center[0],n*this.sp+i*this.cp+this.center[1],-t*this.st+a*this.ct+this.center[2]]}}function Tcorners(e,t,i){let a=[e(t),e([t[0],t[1],i[2]]),e([t[0],i[1],t[2]]),e([t[0],i[1],i[2]]),e([i[0],t[1],t[2]]),e([i[0],t[1],i[2]]),e([i[0],i[1],t[2]]),e(i)];return[minbound(a),maxbound(a)]}function material(e,t,i,a,n,r){Materials.push(new Material(e,t,i,a,n,r))}function patch(e,t,i,a,n,r){P.push(new BezierPatch(e,t,i,a,n,r))}function curve(e,t,i,a,n){P.push(new BezierCurve(e,t,i,a,n))}function pixel(e,t,i,a,n){P.push(new Pixel(e,t,i,a,n))}function triangles(e,t,i,a){P.push(new Triangles(e,t,i,a))}function sphere(e,t,i,n,r){let s,o,l,h,c,d,m=.524670512339254,f=.595936986722291,u=.954967051233925,p=.0820155480083437,g=.996685028842544,v=.0549670512339254,x=.998880711874577,w=.0405017186586849,M=[[[1,0,0],[1,0,m],[f,0,u],[p,0,g],[1,a,0],[1,a,m],[f,a*f,u],[p,a*p,g],[a,1,0],[a,1,m],[a*f,f,u],[a*p,p,g],[0,1,0],[0,1,m],[0,f,u],[0,p,g]],[[p,0,g],[p,a*p,g],[v,0,x],[a*p,p,g],[w,w,1],[.05*a,0,1],[0,p,g],[0,v,x],[0,.05*a,1],[0,0,1]]],b=new Align(e,r);function T(e){let t=Array(e.length);for(let i=0;i<e.length;++i){let a=e[i];t[i]=c([s*a[0],o*a[1],l*a[2]])}return t}r?(h=1,d=0,c=b.T.bind(b)):(h=-1,d=-t,c=b.T0.bind(b));let S=Tcorners(c,[-t,-t,d],[t,t,t]),R=S[0],I=S[1];for(let e=-1;e<=1;e+=2){s=e*t;for(let e=-1;e<=1;e+=2){o=e*t;for(let e=h;e<=1;e+=2){l=e*t;for(let e=0;e<2;++e)P.push(new BezierPatch(T(M[e]),i,n,R,I))}}}}let a=4/3*(Math.sqrt(2)-1);function disk(e,t,i,n,r){let s=1-2*a/3,o=[[1,0,0],[1,-a,0],[a,-1,0],[0,-1,0],[1,a,0],[s,0,0],[0,-s,0],[-a,-1,0],[a,1,0],[0,s,0],[-s,0,0],[-1,-a,0],[0,1,0],[-a,1,0],[-1,a,0],[-1,0,0]],l=new Align(e,r);let h=Tcorners(l.T.bind(l),[-t,-t,0],[t,t,0]);P.push(new BezierPatch(function(e){let i=Array(e.length);for(let a=0;a<e.length;++a){let n=e[a];i[a]=l.T([t*n[0],t*n[1],0])}return i}(o),i,n,h[0],h[1]))}function cylinder(e,t,i,n,r,s,o){let l,h,c=[[1,0,0],[1,0,1/3],[1,0,2/3],[1,0,1],[1,a,0],[1,a,1/3],[1,a,2/3],[1,a,1],[a,1,0],[a,1,1/3],[a,1,2/3],[a,1,1],[0,1,0],[0,1,1/3],[0,1,2/3],[0,1,1]],d=new Align(e,s);function m(e){let t=Array(e.length);for(let a=0;a<e.length;++a){let n=e[a];t[a]=d.T([l*n[0],h*n[1],i*n[2]])}return t}let f=Tcorners(d.T.bind(d),[-t,-t,0],[t,t,i]),u=f[0],p=f[1];for(let e=-1;e<=1;e+=2){l=e*t;for(let e=-1;e<=1;e+=2)h=e*t,P.push(new BezierPatch(m(c),n,r,u,p))}if(o){let t=d.T([0,0,i]);P.push(new BezierCurve([e,t],n,r,e,t))}}function rmf(e,t,i,a,n){class r{constructor(e,t,i){this.p=e,this.r=t,this.t=i,this.s=cross(i,t)}}let s=Number.EPSILON*Math.max(abs2(e),abs2(t),abs2(i),abs2(a));function o(n){if(1==n){let n=[a[0]-i[0],a[1]-i[1],a[2]-i[2]];return abs2(n)>s?unit(n):(n=[2*i[0]-t[0]-a[0],2*i[1]-t[1]-a[1],2*i[2]-t[2]-a[2]],abs2(n)>s?unit(n):[a[0]-e[0]+3*(t[0]-i[0]),a[1]-e[1]+3*(t[1]-i[1]),a[2]-e[2]+3*(t[2]-i[2])])}let r=[a[0]-e[0]+3*(t[0]-i[0]),a[1]-e[1]+3*(t[1]-i[1]),a[2]-e[2]+3*(t[2]-i[2])],o=[2*(e[0]+i[0])-4*t[0],2*(e[1]+i[1])-4*t[1],2*(e[2]+i[2])-4*t[2]],l=[t[0]-e[0],t[1]-e[1],t[2]-e[2]],h=n*n,c=[r[0]*h+o[0]*n+l[0],r[1]*h+o[1]*n+l[1],r[2]*h+o[2]*n+l[2]];return abs2(c)>s?unit(c):(h=2*n,c=[r[0]*h+o[0],r[1]*h+o[1],r[2]*h+o[2]],abs2(c)>s?unit(c):unit(r))}let l=Array(n.length),h=[t[0]-e[0],t[1]-e[1],t[2]-e[2]];abs2(h)<s&&(h=[e[0]-2*t[0]+i[0],e[1]-2*t[1]+i[1],e[2]-2*t[2]+i[2]],abs2(h)<s&&(h=[a[0]-e[0]+3*(t[0]-i[0]),a[1]-e[1]+3*(t[1]-i[1]),a[2]-e[2]+3*(t[2]-i[2])])),h=unit(h);let c=function(e){let t=cross(e,[0,1,0]),i=Number.EPSILON*abs2(e);return abs2(t)>i?unit(t):(t=cross(e,[0,0,1]),abs2(t)>i?unit(t):[1,0,0])}(h);l[0]=new r(e,c,h);for(let s=1;s<n.length;++s){let h=l[s-1],c=n[s],d=1-c,m=d*d,f=m*d,u=3*c;m*=u,d*=u*c;let p=c*c*c,g=[f*e[0]+m*t[0]+d*i[0]+p*a[0],f*e[1]+m*t[1]+d*i[1]+p*a[1],f*e[2]+m*t[2]+d*i[2]+p*a[2]],v=[g[0]-h.p[0],g[1]-h.p[1],g[2]-h.p[2]];if(0!=v[0]||0!=v[1]||0!=v[2]){let e=h.r,t=unit(v),i=h.t,a=dot(t,i),n=[i[0]-2*a*t[0],i[1]-2*a*t[1],i[2]-2*a*t[2]];i=o(c);let d=2*dot(t,e),m=[e[0]-d*t[0],e[1]-d*t[1],e[2]-d*t[2]],f=unit([i[0]-n[0],i[1]-n[1],i[2]-n[2]]),u=2*dot(f,m);m=[m[0]-u*f[0],m[1]-u*f[1],m[2]-u*f[2]],l[s]=new r(g,unit(m),unit(i))}else l[s]=l[s-1]}return l}function tube(e,t,i,n,r,s,o){let l=rmf(e[0],e[1],e[2],e[3],[0,1/3,2/3,1]),h=a*t,c=[[t,0],[t,h],[h,t],[0,t]];function d(t,a,o,h){let d=Array(16);for(let i=0;i<4;++i){let n=l[i],r=n.r[0],s=n.s[0],m=r*t+s*a,f=r*o+s*h;r=n.r[1],s=n.s[1];let u=r*t+s*a,p=r*o+s*h;r=n.r[2],s=n.s[2];let g=r*t+s*a,v=r*o+s*h,x=e[i],w=x[0];w1=x[1],w2=x[2];for(let e=0;e<4;++e){let t=c[e],a=t[0],n=t[1];d[4*i+e]=[m*a+f*n+w,u*a+p*n+w1,g*a+v*n+w2]}}P.push(new BezierPatch(d,i,n,r,s))}d(1,0,0,1),d(0,-1,1,0),d(-1,0,0,-1),d(0,1,-1,0),o&&P.push(new BezierCurve(e,i,n,r,s))}async function getReq(e){return(await fetch(e)).arrayBuffer()}function rgb(e){return e.getBytes().filter((e,t)=>t%4!=3)}function createTexture(e,t,i=gl.RGB16F){let a=e.width(),n=e.height(),r=gl.createTexture();return gl.activeTexture(gl.TEXTURE0+t),gl.bindTexture(gl.TEXTURE_2D,r),gl.pixelStorei(gl.UNPACK_ALIGNMENT,1),gl.texParameteri(gl.TEXTURE_2D,gl.TEXTURE_MIN_FILTER,gl.LINEAR),gl.texParameteri(gl.TEXTURE_2D,gl.TEXTURE_MAG_FILTER,gl.LINEAR),gl.texImage2D(gl.TEXTURE_2D,0,i,a,n,0,gl.RGB,gl.FLOAT,rgb(e)),r}async function initIBL(){let e=imageURL+image+"/";function t(e){return new Promise(t=>setTimeout(t,e))}for(;!Module.EXRLoader;)await t(0);promises=[getReq(imageURL+"refl.exr").then(e=>{let t=new Module.EXRLoader(e);IBLbdrfMap=createTexture(t,0)}),getReq(e+"diffuse.exr").then(e=>{let t=new Module.EXRLoader(e);IBLDiffuseMap=createTexture(t,1)})],refl_promise=[],refl_promise.push(getReq(e+"refl0.exr"));for(let t=1;t<=roughnessStepCount;++t)refl_promise.push(getReq(e+"refl"+t+"w.exr"));finished_promise=Promise.all(refl_promise).then(e=>{let t=gl.createTexture();gl.activeTexture(gl.TEXTURE0+2),gl.pixelStorei(gl.UNPACK_ALIGNMENT,1),gl.bindTexture(gl.TEXTURE_2D,t),gl.texParameteri(gl.TEXTURE_2D,gl.TEXTURE_MAX_LEVEL,e.length-1),gl.texParameteri(gl.TEXTURE_2D,gl.TEXTURE_MIN_FILTER,gl.LINEAR_MIPMAP_LINEAR),gl.texParameteri(gl.TEXTURE_2D,gl.TEXTURE_MAG_FILTER,gl.LINEAR),gl.texParameterf(gl.TEXTURE_2D,gl.TEXTURE_MIN_LOD,0),gl.texParameterf(gl.TEXTURE_2D,gl.TEXTURE_MAX_LOD,roughnessStepCount);for(let t=0;t<e.length;++t){let i=new Module.EXRLoader(e[t]);gl.texImage2D(gl.TEXTURE_2D,t,gl.RGB16F,i.width(),i.height(),0,gl.RGB,gl.FLOAT,rgb(i))}IBLReflMap=t}),promises.push(finished_promise),await Promise.all(promises)}function webGLStart(){canvas=document.getElementById("Asymptote"),embedded=window.top.document!=document,initGL(),gl.enable(gl.BLEND),gl.blendFunc(gl.SRC_ALPHA,gl.ONE_MINUS_SRC_ALPHA),gl.enable(gl.DEPTH_TEST),gl.enable(gl.SCISSOR_TEST),canvas.onmousedown=handleMouseDown,document.onmouseup=handleMouseUpOrTouchEnd,document.onmousemove=handleMouseMove,canvas.onkeydown=handleKey,embedded||enableZoom(),canvas.addEventListener("touchstart",handleTouchStart,!1),canvas.addEventListener("touchend",handleMouseUpOrTouchEnd,!1),canvas.addEventListener("touchcancel",handleMouseUpOrTouchEnd,!1),canvas.addEventListener("touchleave",handleMouseUpOrTouchEnd,!1),canvas.addEventListener("touchmove",handleTouchMove,!1),document.addEventListener("keydown",handleKey,!1),canvasWidth0=canvasWidth,canvasHeight0=canvasHeight,mat4.identity(rotMat),0!=window.innerWidth&&0!=window.innerHeight&&resize(),window.addEventListener("resize",resize,!1),ibl&&initIBL().then(SetIBL).then(redrawScene)}