asy 2.61 sources

git-svn-id: svn://tug.org/texlive/trunk@52856 c570f23f-e606-0410-a88d-b1316a301751

1 files changed, 1 insertions, 1 deletions

diff --git a/Build/source/utils/asymptote/base/webgl/asygl.js b/Build/source/utils/asymptote/base/webgl/asygl.js
index 75c97ad6957..4c053eb4787 100644
--- a/Build/source/utils/asymptote/base/webgl/asygl.js
+++ b/Build/source/utils/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="\nattribute vec3 position;\n#ifdef WIDTH\nattribute float width;\n#endif\n#ifdef NORMAL\nattribute vec3 normal;\n#endif\nattribute float materialIndex;\n#ifdef COLOR\nattribute vec4 color;\n#endif\n\nuniform mat3 normMat;\nuniform mat4 viewMat;\nuniform mat4 projViewMat;\n\n#ifdef NORMAL\n#ifndef ORTHOGRAPHIC\nvarying vec3 ViewPosition;\n#endif\nvarying vec3 Normal;\n#endif\nvarying vec4 diffuse;\nvarying vec3 specular;\nvarying float roughness,metallic,fresnel0;\nvarying vec4 emissive;\n\nstruct Material {\n  vec4 diffuse,emissive,specular;\n  vec4 parameters;\n};\n\nuniform Material Materials[Nmaterials];\n\nvoid main(void)\n{\n  vec4 v=vec4(position,1.0);\n  gl_Position=projViewMat*v;\n#ifdef NORMAL\n#ifndef ORTHOGRAPHIC\n  ViewPosition=(viewMat*v).xyz;\n#endif      \n  Normal=normal*normMat;\n        \n  Material m;\n#ifdef TRANSPARENT\n  m=Materials[int(abs(materialIndex))-1];\n  if(materialIndex >= 0.0) {\n    diffuse=m.diffuse;\n    emissive=m.emissive;\n  } else {\n    diffuse=color;\n#if nlights > 0\n    emissive=vec4(0.0);\n#else\n    emissive=color;\n#endif\n  }\n#else\n  m=Materials[int(materialIndex)];\n#ifdef COLOR\n  diffuse=color;\n#if nlights > 0\n  emissive=vec4(0.0);\n#else\n  emissive=color;\n#endif\n#else\n  diffuse=m.diffuse;\n  emissive=m.emissive;\n#endif\n#endif\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\n#ifdef WIDTH\n  gl_PointSize=width;\n#endif\n}\n",fragment="\n#ifdef NORMAL\n#ifndef ORTHOGRAPHIC\nvarying vec3 ViewPosition;\n#endif\nvarying vec3 Normal;\nvarying vec4 diffuse;\nvarying vec3 specular;\nvarying float roughness,metallic,fresnel0;\n\nfloat Roughness2;\nvec3 normal;\n\nstruct Light {\n  vec3 direction;\n  vec3 color;\n};\n\nuniform Light Lights[Nlights];\n\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 omegali=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*omegali;\n  float rawReflectance=denom > 0.0 ? 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a=function(e){if(e&&e.__esModule)return e;var t={};if(null!=e)for(var i in e)Object.prototype.hasOwnProperty.call(e,i)&&(t[i]=e[i]);return t.default=e,t}(i(0));function r(e,t,i){var a=t[0],r=t[1],n=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],v=t[12],g=t[13],p=t[14],x=t[15],M=i[0],w=i[1],A=i[2],b=i[3];return e[0]=M*a+w*o+A*d+b*v,e[1]=M*r+w*l+A*m+b*g,e[2]=M*n+w*h+A*f+b*p,e[3]=M*s+w*c+A*u+b*x,M=i[4],w=i[5],A=i[6],b=i[7],e[4]=M*a+w*o+A*d+b*v,e[5]=M*r+w*l+A*m+b*g,e[6]=M*n+w*h+A*f+b*p,e[7]=M*s+w*c+A*u+b*x,M=i[8],w=i[9],A=i[10],b=i[11],e[8]=M*a+w*o+A*d+b*v,e[9]=M*r+w*l+A*m+b*g,e[10]=M*n+w*h+A*f+b*p,e[11]=M*s+w*c+A*u+b*x,M=i[12],w=i[13],A=i[14],b=i[15],e[12]=M*a+w*o+A*d+b*v,e[13]=M*r+w*l+A*m+b*g,e[14]=M*n+w*h+A*f+b*p,e[15]=M*s+w*c+A*u+b*x,e}}])});let canvasWidth,canvasHeight,b,B,angle,Zoom0,viewportmargin,zoomFactor,zoomPinchFactor,zoomPinchCap,zoomStep,shiftHoldDistance,shiftWaitTime,vibrateTime,embedded,canvas,gl,alpha,offscreen,context,maxMaterials,halfCanvasWidth,halfCanvasHeight,Zoom,P=[],Materials=[],Lights=[],Centers=[],Background=[1,1,1,1],absolute=!1,viewportshift=[0,0],nlights=0,Nmaterials=1,materials=[],pixel=.75,BezierFactor=.4,FillFactor=.1,maxViewportWidth=window.innerWidth,maxViewportHeight=window.innerHeight;const windowTrim=10;let lastzoom,H,zmin,zmax,size2,ArcballFactor,positionBuffer,materialBuffer,colorBuffer,indexBuffer,resizeStep=1.2,Fuzz2=1e3*Number.EPSILON,Fuzz4=Fuzz2*Fuzz2,third=1/3,rotMat=mat4.create(),projMat=mat4.create(),viewMat=mat4.create(),projViewMat=mat4.create(),normMat=mat3.create(),viewMat3=mat3.create(),rotMats=mat4.create(),cjMatInv=mat4.create(),translMat=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},redraw=!0,remesh=!0,mouseDownOrTouchActive=!1,lastMouseX=null,lastMouseY=null,touchID=null,Positions=[],Normals=[],Colors=[],Indices=[];class Material{constructor(e,t,i,a,r,n){this.diffuse=e,this.emissive=t,this.specular=i,this.shininess=a,this.metallic=r,this.fresnel0=n}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,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(){let e=gl.getParameter(gl.MAX_VERTEX_UNIFORM_VECTORS);maxMaterials=Math.floor((e-14)/4),Nmaterials=Math.min(Math.max(Nmaterials,Materials.length),maxMaterials),noNormalShader=initShader(),pixelShader=initShader(["WIDTH"]),materialShader=initShader(["NORMAL"]),colorShader=initShader(["NORMAL","COLOR"]),transparentShader=initShader(["NORMAL","COLOR","TRANSPARENT"])}function setBuffers(){positionBuffer=gl.createBuffer(),materialBuffer=gl.createBuffer(),colorBuffer=gl.createBuffer(),indexBuffer=gl.createBuffer()}function noGL(){gl||alert("Could not initialize WebGL")}function saveAttributes(){let e=window.parent.document.asygl[alpha];e.gl=gl,e.nlights=Lights.length,e.Nmaterials=Nmaterials,e.maxMaterials=maxMaterials,e.noNormalShader=noNormalShader,e.pixelShader=pixelShader,e.materialShader=materialShader,e.colorShader=colorShader,e.transparentShader=transparentShader}function restoreAttributes(){let e=window.parent.document.asygl[alpha];gl=e.gl,nlights=e.nlights,Nmaterials=e.Nmaterials,maxMaterials=e.maxMaterials,noNormalShader=e.noNormalShader,pixelShader=e.pixelShader,materialShader=e.materialShader,colorShader=e.colorShader,transparentShader=e.transparentShader}function initGL(){if(alpha=Background[3]<1,embedded){let e=window.parent.document;null==e.asygl&&(e.asygl=Array(2)),context=canvas.getContext("2d"),(offscreen=e.offscreen)||(offscreen=e.createElement("canvas"),e.offscreen=offscreen),e.asygl[alpha]&&e.asygl[alpha].gl?(restoreAttributes(),(Lights.length!=nlights||Math.min(Materials.length,maxMaterials)>Nmaterials)&&(initShaders(),saveAttributes())):((gl=offscreen.getContext("webgl",{alpha:alpha}))||noGL(),initShaders(),e.asygl[alpha]={},saveAttributes())}else(gl=canvas.getContext("webgl",{alpha:alpha}))||noGL(),initShaders();setBuffers(),indexExt=gl.getExtension("OES_element_index_uint")}function getShader(e,t,i,a=[]){let r=`#version 100\n#ifdef GL_FRAGMENT_PRECISION_HIGH\n  precision highp float;\n#else\n  precision mediump float;\n#endif\n  #define nlights ${Lights.length}\n\n  const int Nlights=${Math.max(Lights.length,1)};\n\n  #define Nmaterials ${Nmaterials}\n`;orthographic&&(r+="#define ORTHOGRAPHIC\n"),a.forEach(e=>r+="#define "+e+"\n");let n=e.createShader(i);return e.shaderSource(n,r+t),e.compileShader(n),e.getShaderParameter(n,e.COMPILE_STATUS)?n:(alert(e.getShaderInfoLog(n)),null)}function drawBuffer(e,t,i=e.indices){if(0==e.indices.length)return;let a=t==pixelShader,r=t!=noNormalShader&&!a;setUniforms(e,t),gl.bindBuffer(gl.ARRAY_BUFFER,positionBuffer),gl.bufferData(gl.ARRAY_BUFFER,new Float32Array(e.vertices),gl.STATIC_DRAW),gl.vertexAttribPointer(t.vertexPositionAttribute,3,gl.FLOAT,!1,r?24:a?16:12,0),r&&Lights.length>0?gl.vertexAttribPointer(t.vertexNormalAttribute,3,gl.FLOAT,!1,24,12):a&&gl.vertexAttribPointer(t.vertexWidthAttribute,1,gl.FLOAT,!1,16,12),-1!=t.vertexMaterialAttribute&&(gl.bindBuffer(gl.ARRAY_BUFFER,materialBuffer),gl.bufferData(gl.ARRAY_BUFFER,new Int16Array(e.materialIndices),gl.STATIC_DRAW),gl.vertexAttribPointer(t.vertexMaterialAttribute,1,gl.SHORT,!1,2,0)),t!=colorShader&&t!=transparentShader||(gl.bindBuffer(gl.ARRAY_BUFFER,colorBuffer),gl.bufferData(gl.ARRAY_BUFFER,new Uint8Array(e.colors),gl.STATIC_DRAW),gl.vertexAttribPointer(t.vertexColorAttribute,4,gl.UNSIGNED_BYTE,!0,0,0)),gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER,indexBuffer),gl.bufferData(gl.ELEMENT_ARRAY_BUFFER,indexExt?new Uint32Array(i):new Uint16Array(i),gl.STATIC_DRAW),gl.drawElements(r?gl.TRIANGLES:a?gl.POINTS:gl.LINES,i.length,indexExt?gl.UNSIGNED_INT:gl.UNSIGNED_SHORT,0)}class vertexBuffer{constructor(){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++}vertex1(e){return this.vertices.push(e[0]),this.vertices.push(e[1]),this.vertices.push(e[2]),this.materialIndices.push(materialIndex),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 r=6*e;this.vertices[r]=t[0],this.vertices[r+1]=t[1],this.vertices[r+2]=t[2],this.vertices[r+3]=i[0],this.vertices[r+4]=i[1],this.vertices[r+5]=i[2],this.materialIndices[e]=materialIndex;let n=4*e;this.colors[n]=a[0],this.colors[n+1]=a[1],this.colors[n+2]=a[2],this.colors[n+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}}let materialIndex,material0Data=new vertexBuffer,material1Data=new vertexBuffer,materialData=new vertexBuffer,colorData=new vertexBuffer,transparentData=new vertexBuffer,triangleData=new vertexBuffer;function append(e,t){let i=e.length,a=t.length;e.length+=a;for(let r=0;r<a;++r)e[i+r]=t[r]}function appendOffset(e,t,i){let a=e.length,r=t.length;e.length+=t.length;for(let n=0;n<r;++n)e[a+n]=t[n]+i}class Geometry{constructor(){this.data=new vertexBuffer,this.Onscreen=!1,this.m=[]}offscreen(e){let t=projViewMat,i=e[0],a=i[0],r=i[1],n=i[2],s=1/(t[3]*a+t[7]*r+t[11]*n+t[15]);this.x=this.X=(t[0]*a+t[4]*r+t[8]*n+t[12])*s,this.y=this.Y=(t[1]*a+t[5]*r+t[9]*n+t[13])*s;for(let i=1,a=e.length;i<a;++i){let a=e[i],r=a[0],n=a[1],s=a[2],o=1/(t[3]*r+t[7]*n+t[11]*s+t[15]),l=(t[0]*r+t[4]*n+t[8]*s+t[12])*o,h=(t[1]*r+t[5]*n+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],r=e[0]-t,n=e[1]-i,s=e[2]-a;return[r*normMat[0]+n*normMat[3]+s*normMat[6]+t,r*normMat[1]+n*normMat[4]+s*normMat[7]+i,r*normMat[2]+n*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&&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 void this.data.clear();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]/B[2],r=pixel*Math.hypot(a*(viewParam.xmax-viewParam.xmin),a*(viewParam.ymax-viewParam.ymin))/size2;this.res2=r*r,this.Epsilon=FillFactor*r,this.data.clear(),this.Onscreen=!0,this.process(t)}}class BezierPatch extends Geometry{constructor(e,t,i,a,r,n){super(),this.controlpoints=e,this.Min=a,this.Max=r,this.color=n,this.CenterIndex=t;let s=e.length;if(n){let e=n[0][3]+n[1][3]+n[2][3];this.transparent=16==s||4==s?e+n[3][3]<1020:e<765}else this.transparent=Materials[i].diffuse[3]<1;this.MaterialIndex=i,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*=Fuzz4}processTriangle(e){let t=e[0],i=e[1],a=e[2],r=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]]));this.offscreen([t,i,a])||(this.color?(this.data.indices.push(this.data.Vertex(t,r,this.color[0])),this.data.indices.push(this.data.Vertex(i,r,this.color[1])),this.data.indices.push(this.data.Vertex(a,r,this.color[2]))):(this.data.indices.push(this.vertex(t,r)),this.data.indices.push(this.vertex(i,r)),this.data.indices.push(this.vertex(a,r))),this.append())}processQuad(e){let t=e[0],i=e[1],a=e[2],r=e[3],n=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]-r[0],a[1]-r[1],a[2]-r[2]],[r[0]-t[0],r[1]-t[1],r[2]-t[2]]),o=unit([n[0]+s[0],n[1]+s[1],n[2]+s[2]]);if(!this.offscreen([t,i,a,r])){let e,n,s,l;this.color?(e=this.data.Vertex(t,o,this.color[0]),n=this.data.Vertex(i,o,this.color[1]),s=this.data.Vertex(a,o,this.color[2]),l=this.data.Vertex(r,o,this.color[3])):(e=this.vertex(t,o),n=this.vertex(i,o),s=this.vertex(a,o),l=this.vertex(r,o)),this.data.indices.push(e),this.data.indices.push(n),this.data.indices.push(s),this.data.indices.push(e),this.data.indices.push(s),this.data.indices.push(l),this.append()}}process(e){if(this.transparent&&(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);let t=e[0],i=e[3],a=e[12],r=e[15],n=this.normal(i,e[2],e[1],t,e[4],e[8],a);iszero(n)&&iszero(n=this.normal(i,e[2],e[1],t,e[13],e[14],r))&&(n=this.normal(r,e[11],e[7],i,e[4],e[8],a));let s=this.normal(t,e[4],e[8],a,e[13],e[14],r);iszero(s)&&iszero(s=this.normal(t,e[4],e[8],a,e[11],e[7],i))&&(s=this.normal(i,e[2],e[1],t,e[13],e[14],r));let o=this.normal(a,e[13],e[14],r,e[11],e[7],i);iszero(o)&&iszero(o=this.normal(a,e[13],e[14],r,e[2],e[1],t))&&(o=this.normal(t,e[4],e[8],a,e[11],e[7],i));let l=this.normal(r,e[11],e[7],i,e[2],e[1],t);if(iszero(l)&&iszero(l=this.normal(r,e[11],e[7],i,e[4],e[8],a))&&(l=this.normal(a,e[13],e[14],r,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,n,h),u=this.data.Vertex(a,s,c),v=this.data.Vertex(r,o,d),g=this.data.Vertex(i,l,m);this.Render(e,f,u,v,g,t,a,r,i,!1,!1,!1,!1,h,c,d,m)}else{let h=this.vertex(t,n),c=this.vertex(a,s),d=this.vertex(r,o),m=this.vertex(i,l);this.Render(e,h,c,d,m,t,a,r,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)}Render(e,t,i,a,r,n,s,o,l,h,c,d,m,f,u,v,g){if(this.Distance(e)<this.res2)this.offscreen([n,s,o])||(this.data.indices.push(t),this.data.indices.push(i),this.data.indices.push(a)),this.offscreen([n,o,l])||(this.data.indices.push(t),this.data.indices.push(a),this.data.indices.push(r));else{if(this.offscreen(e))return;let p=e[0],x=e[3],M=e[12],w=e[15],A=new Split3(p,e[1],e[2],x),b=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],w),P=new Split3(p,e[4],e[8],M),D=new Split3(A.m0,b.m0,S.m0,R.m0),T=new Split3(A.m3,b.m3,S.m3,R.m3),y=new Split3(A.m5,b.m5,S.m5,R.m5),I=new Split3(A.m4,b.m4,S.m4,R.m4),z=new Split3(A.m2,b.m2,S.m2,R.m2),O=new Split3(x,e[7],e[11],w),E=[p,A.m0,A.m3,A.m5,P.m0,D.m0,T.m0,y.m0,P.m3,D.m3,T.m3,y.m3,P.m5,D.m5,T.m5,y.m5],_=[P.m5,D.m5,T.m5,y.m5,P.m4,D.m4,T.m4,y.m4,P.m2,D.m2,T.m2,y.m2,M,R.m0,R.m3,R.m5],L=[y.m5,I.m5,z.m5,O.m5,y.m4,I.m4,z.m4,O.m4,y.m2,I.m2,z.m2,O.m2,R.m5,R.m4,R.m2,w],N=[A.m5,A.m4,A.m2,x,y.m0,I.m0,z.m0,O.m0,y.m3,I.m3,z.m3,O.m3,y.m5,I.m5,z.m5,O.m5],C=E[15],B=this.normal(E[0],E[4],E[8],E[12],E[13],E[14],E[15]);iszero(B)&&iszero(B=this.normal(E[0],E[4],E[8],E[12],E[11],E[7],E[3]))&&(B=this.normal(E[3],E[2],E[1],E[0],E[13],E[14],E[15]));let F=this.normal(_[12],_[13],_[14],_[15],_[11],_[7],_[3]);iszero(F)&&iszero(F=this.normal(_[12],_[13],_[14],_[15],_[2],_[1],_[0]))&&(F=this.normal(_[0],_[4],_[8],_[12],_[11],_[7],_[3]));let V=this.normal(L[15],L[11],L[7],L[3],L[2],L[1],L[0]);iszero(V)&&iszero(V=this.normal(L[15],L[11],L[7],L[3],L[4],L[8],L[12]))&&(V=this.normal(L[12],L[13],L[14],L[15],L[2],L[1],L[0]));let H=this.normal(N[3],N[2],N[1],N[0],N[4],N[8],N[12]);iszero(H)&&iszero(H=this.normal(N[3],N[2],N[1],N[0],N[13],N[14],N[15]))&&(H=this.normal(N[15],N[11],N[7],N[3],N[4],N[8],N[12]));let G=this.normal(L[3],L[2],L[1],C,L[4],L[8],L[12]),U=this.Epsilon,W=[.5*(n[0]+s[0]),.5*(n[1]+s[1]),.5*(n[2]+s[2])];if(!h)if(h=Straightness(p,e[4],e[8],M)<this.res2){let e=unit(this.derivative(_[0],_[1],_[2],_[3]));W=[W[0]-U*e[0],W[1]-U*e[1],W[2]-U*e[2]]}else W=E[12];let Y=[.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],w)<this.res2){let e=unit(this.derivative(L[12],L[8],L[4],L[0]));Y=[Y[0]-U*e[0],Y[1]-U*e[1],Y[2]-U*e[2]]}else Y=_[15];let j=[.5*(o[0]+l[0]),.5*(o[1]+l[1]),.5*(o[2]+l[2])];if(!d)if(d=Straightness(w,e[11],e[7],x)<this.res2){let e=unit(this.derivative(N[15],L[14],L[13],_[12]));j=[j[0]-U*e[0],j[1]-U*e[1],j[2]-U*e[2]]}else j=L[3];let k=[.5*(l[0]+n[0]),.5*(l[1]+n[1]),.5*(l[2]+n[2])];if(!m)if(m=Straightness(p,e[1],e[2],x)<this.res2){let e=unit(this.derivative(E[3],E[7],E[11],E[15]));k=[k[0]-U*e[0],k[1]-U*e[1],k[2]-U*e[2]]}else k=N[0];if(f){let e=Array(4),p=Array(4),x=Array(4),M=Array(4),w=Array(4);for(let t=0;t<4;++t)e[t]=.5*(f[t]+u[t]),p[t]=.5*(u[t]+v[t]),x[t]=.5*(v[t]+g[t]),M[t]=.5*(g[t]+f[t]),w[t]=.5*(e[t]+x[t]);let A=this.data.Vertex(W,B,e),b=this.data.Vertex(Y,F,p),S=this.data.Vertex(j,V,x),R=this.data.Vertex(k,H,M),P=this.data.Vertex(C,G,w);this.Render(E,t,A,P,R,n,W,C,k,h,!1,!1,m,f,e,w,M),this.Render(_,A,i,b,P,W,s,Y,C,h,c,!1,!1,e,u,p,w),this.Render(L,P,b,a,S,C,Y,o,j,!1,c,d,!1,w,p,v,x),this.Render(N,R,P,S,r,k,C,j,l,!1,!1,d,m,M,w,x,g)}else{let e=this.vertex(W,B),f=this.vertex(Y,F),u=this.vertex(j,V),v=this.vertex(k,H),g=this.vertex(C,G);this.Render(E,t,e,g,v,n,W,C,k,h,!1,!1,m),this.Render(_,e,i,f,g,W,s,Y,C,h,c,!1,!1),this.Render(L,g,f,a,u,C,Y,o,j,!1,c,d,!1),this.Render(N,v,g,u,r,k,C,j,l,!1,!1,d,m)}}}process3(e){this.Res2=BezierFactor*BezierFactor*this.res2;let t=e[0],i=e[6],a=e[9],r=this.normal(a,e[5],e[2],t,e[1],e[3],i),n=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,r,o),d=this.data.Vertex(i,n,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,r),l=this.vertex(i,n),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,r,n,s,o,l,h,c,d,m){if(this.Distance3(e)<this.Res2)this.offscreen([r,n,s])||(this.data.indices.push(t),this.data.indices.push(i),this.data.indices.push(a));else{if(this.offscreen(e))return;let f=e[0],u=e[1],v=e[2],g=e[3],p=e[4],x=e[5],M=e[6],w=e[7],A=e[8],b=e[9],S=[.5*(b[0]+x[0]),.5*(b[1]+x[1]),.5*(b[2]+x[2])],R=[.5*(b[0]+A[0]),.5*(b[1]+A[1]),.5*(b[2]+A[2])],P=[.5*(x[0]+v[0]),.5*(x[1]+v[1]),.5*(x[2]+v[2])],D=[.5*(A[0]+p[0]),.5*(A[1]+p[1]),.5*(A[2]+p[2])],T=[.5*(A[0]+w[0]),.5*(A[1]+w[1]),.5*(A[2]+w[2])],y=[.5*(v[0]+p[0]),.5*(v[1]+p[1]),.5*(v[2]+p[2])],I=[.5*(v[0]+f[0]),.5*(v[1]+f[1]),.5*(v[2]+f[2])],z=[.5*(p[0]+g[0]),.5*(p[1]+g[1]),.5*(p[2]+g[2])],O=[.5*(w[0]+M[0]),.5*(w[1]+M[1]),.5*(w[2]+M[2])],E=[.5*(f[0]+u[0]),.5*(f[1]+u[1]),.5*(f[2]+u[2])],_=[.5*(u[0]+g[0]),.5*(u[1]+g[1]),.5*(u[2]+g[2])],L=[.5*(g[0]+M[0]),.5*(g[1]+M[1]),.5*(g[2]+M[2])],N=[.5*(S[0]+P[0]),.5*(S[1]+P[1]),.5*(S[2]+P[2])],C=[.5*(R[0]+T[0]),.5*(R[1]+T[1]),.5*(R[2]+T[2])],B=[.5*(P[0]+I[0]),.5*(P[1]+I[1]),.5*(P[2]+I[2])],F=[.5*D[0]+.25*(p[0]+u[0]),.5*D[1]+.25*(p[1]+u[1]),.5*D[2]+.25*(p[2]+u[2])],V=[.5*(T[0]+O[0]),.5*(T[1]+O[1]),.5*(T[2]+O[2])],H=[.5*y[0]+.25*(p[0]+w[0]),.5*y[1]+.25*(p[1]+w[1]),.5*y[2]+.25*(p[2]+w[2])],G=[.25*(x[0]+p[0])+.5*z[0],.25*(x[1]+p[1])+.5*z[1],.25*(x[2]+p[2])+.5*z[2]],U=[.5*(E[0]+_[0]),.5*(E[1]+_[1]),.5*(E[2]+_[2])],W=[.5*(_[0]+L[0]),.5*(_[1]+L[1]),.5*(_[2]+L[2])],Y=[.5*(H[0]+U[0]),.5*(H[1]+U[1]),.5*(H[2]+U[2])],j=[.5*(H[0]+W[0]),.5*(H[1]+W[1]),.5*(H[2]+W[2])],k=[.5*(U[0]+W[0]),.5*(U[1]+W[1]),.5*(U[2]+W[2])],X=[.5*(G[0]+V[0]),.5*(G[1]+V[1]),.5*(G[2]+V[2])],Z=[.5*(C[0]+G[0]),.5*(C[1]+G[1]),.5*(C[2]+G[2])],q=[.5*(C[0]+V[0]),.5*(C[1]+V[1]),.5*(C[2]+V[2])],K=[.5*(N[0]+F[0]),.5*(N[1]+F[1]),.5*(N[2]+F[2])],$=[.5*(B[0]+F[0]),.5*(B[1]+F[1]),.5*(B[2]+F[2])],Q=[.5*(N[0]+B[0]),.5*(N[1]+B[1]),.5*(N[2]+B[2])],J=[f,E,I,U,[.5*(y[0]+E[0]),.5*(y[1]+E[1]),.5*(y[2]+E[2])],B,k,Y,$,Q],ee=[k,W,j,L,[.5*(z[0]+O[0]),.5*(z[1]+O[1]),.5*(z[2]+O[2])],X,M,O,V,q],te=[Q,K,N,Z,[.5*(S[0]+D[0]),.5*(S[1]+D[1]),.5*(S[2]+D[2])],S,q,C,R,b],ie=[q,Z,X,K,[.25*(P[0]+T[0]+_[0]+p[0]),.25*(P[1]+T[1]+_[1]+p[1]),.25*(P[2]+T[2]+_[2]+p[2])],j,Q,$,Y,k],ae=this.normal(k,j,X,q,Z,K,Q),re=this.normal(q,Z,K,Q,$,Y,k),ne=this.normal(Q,$,Y,k,j,X,q),se=this.Epsilon,oe=[.5*(n[0]+s[0]),.5*(n[1]+s[1]),.5*(n[2]+s[2])];if(!o)if(o=Straightness(M,w,A,b)<this.res2){let e=unit(this.sumderivative(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]+r[0]),.5*(s[1]+r[1]),.5*(s[2]+r[2])];if(!l)if(l=Straightness(f,v,x,b)<this.res2){let e=unit(this.sumderivative(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*(r[0]+n[0]),.5*(r[1]+n[1]),.5*(r[2]+n[2])];if(!h)if(h=Straightness(f,u,g,M)<this.res2){let e=unit(this.sumderivative(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=k;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 v=this.data.Vertex(oe,ae,e),g=this.data.Vertex(le,re,f),p=this.data.Vertex(he,ne,u);this.Render3(J,t,p,g,r,he,le,!1,l,h,c,u,f),this.Render3(ee,p,i,v,he,n,oe,o,!1,h,u,d,e),this.Render3(te,g,v,a,le,oe,s,o,l,!1,f,e,m),this.Render3(ie,v,g,p,oe,le,he,!1,!1,!1,e,f,u)}else{let e=this.vertex(oe,ae),c=this.vertex(le,re),d=this.vertex(he,ne);this.Render3(J,t,d,c,r,he,le,!1,l,h),this.Render3(ee,d,i,e,he,n,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],r=e[15],n=Distance2(r,t,this.normal(i,e[2],e[1],t,e[4],e[8],a));return n=Math.max(n,Straightness(t,e[1],e[2],i)),n=Math.max(n,Straightness(t,e[4],e[8],a)),n=Math.max(n,Straightness(i,e[7],e[11],r)),n=Math.max(n,Straightness(a,e[13],e[14],r)),n=Math.max(n,Straightness(e[4],e[5],e[6],e[7])),n=Math.max(n,Straightness(e[8],e[9],e[10],e[11])),n=Math.max(n,Straightness(e[1],e[5],e[9],e[13])),Math.max(n,Straightness(e[2],e[6],e[10],e[14]))}Distance3(e){let t=e[0],i=e[4],a=e[6],r=e[9],n=abs2([(t[0]+a[0]+r[0])*third-i[0],(t[1]+a[1]+r[1])*third-i[1],(t[2]+a[2]+r[2])*third-i[2]]);return n=Math.max(n,Straightness(t,e[1],e[3],a)),n=Math.max(n,Straightness(t,e[2],e[5],r)),Math.max(n,Straightness(a,e[7],e[8],r))}derivative(e,t,i,a){let r=[t[0]-e[0],t[1]-e[1],t[2]-e[2]];if(abs2(r)>this.epsilon)return r;let n=bezierPP(e,t,i);return abs2(n)>this.epsilon?n:bezierPPP(e,t,i,a)}sumderivative(e,t,i,a,r,n,s){let o=this.derivative(e,t,i,a),l=this.derivative(e,r,n,s);return[o[0]+l[0],o[1]+l[1],o[2]+l[2]]}normal(e,t,i,a,r,n,s){let o=r[0]-a[0],l=r[1]-a[1],h=r[2]-a[2],c=i[0]-a[0],d=i[1]-a[1],m=i[2]-a[2],f=[l*m-h*d,h*c-o*m,o*d-l*c];if(abs2(f)>this.epsilon)return unit(f);let u=[c,d,m],v=[o,l,h],g=bezierPP(a,i,t),p=bezierPP(a,r,n),x=cross(p,u),M=cross(v,g);if(abs2(f=[x[0]+M[0],x[1]+M[1],x[2]+M[2]])>this.epsilon)return unit(f);let w=bezierPPP(a,i,t,e),A=bezierPPP(a,r,n,s);x=cross(p,g),M=cross(v,w);let b=cross(A,u),S=cross(A,g),R=cross(p,w),P=cross(A,w);return unit([9*x[0]+3*(M[0]+b[0]+S[0]+R[0])+P[0],9*x[1]+3*(M[1]+b[1]+S[1]+R[1])+P[1],9*x[2]+3*(M[2]+b[2]+S[2]+R[2])+P[2]])}}class BezierCurve extends Geometry{constructor(e,t,i,a,r){super(),this.controlpoints=e,this.Min=a,this.Max=r,this.CenterIndex=t,this.MaterialIndex=i}setMaterialIndex(){this.setMaterial(material1Data,drawMaterial1)}processLine(e){let t=e[0],i=e[1];this.offscreen([t,i])||(this.data.indices.push(this.data.vertex1(t)),this.data.indices.push(this.data.vertex1(i)),this.append())}process(e){if(2==e.length)return this.processLine(e);let t=this.data.vertex1(e[0]),i=this.data.vertex1(e[3]);this.Render(e,t,i),this.data.indices.length>0&&this.append()}append(){material1Data.append(this.data)}Render(e,t,i){let a=e[0],r=e[1],n=e[2],s=e[3];if(Straightness(a,r,n,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]+r[0]),.5*(a[1]+r[1]),.5*(a[2]+r[2])],l=[.5*(r[0]+n[0]),.5*(r[1]+n[1]),.5*(r[2]+n[2])],h=[.5*(n[0]+s[0]),.5*(n[1]+s[1]),.5*(n[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],v=this.data.vertex1(m);this.Render(f,t,v),this.Render(u,v,i)}}}class Pixel extends Geometry{constructor(e,t,i,a,r){super(),this.controlpoint=e,this.width=t,this.CenterIndex=0,this.MaterialIndex=i,this.Min=a,this.Max=r}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)}}class Triangles extends Geometry{constructor(e,t,i){super(),this.CenterIndex=0,this.MaterialIndex=e,this.Min=t,this.Max=i,this.Positions=Positions,this.Normals=Normals,this.Colors=Colors,this.Indices=Indices,Positions=[],Normals=[],Colors=[],Indices=[],this.transparent=Materials[e].diffuse[3]<1}setMaterialIndex(){this.transparent?this.setMaterial(transparentData,drawTransparent):this.setMaterial(triangleData,drawTriangle)}process(e){materialIndex=this.Colors.length>0?-1-materialIndex:1+materialIndex;for(let e=0,t=this.Indices.length;e<t;++e){let t=this.Indices[e],i=t[0],a=this.Positions[i[0]],r=this.Positions[i[1]],n=this.Positions[i[2]];if(!this.offscreen([a,r,n])){let e=t.length>1?t[1]:i;if(e&&0!=e.length||(e=i),this.Colors.length>0){let s=t.length>2?t[2]:i;s&&0!=s.length||(s=i);let o=this.Colors[s[0]],l=this.Colors[s[1]],h=this.Colors[s[2]];this.transparent|=o[3]+l[3]+h[3]<765,this.data.iVertex(i[0],a,this.Normals[e[0]],o),this.data.iVertex(i[1],r,this.Normals[e[1]],l),this.data.iVertex(i[2],n,this.Normals[e[2]],h)}else this.data.iVertex(i[0],a,this.Normals[e[0]]),this.data.iVertex(i[1],r,this.Normals[e[1]]),this.data.iVertex(i[2],n,this.Normals[e[2]])}}this.data.nvertices=this.Positions.length,this.data.indices.length>0&&this.append()}append(){this.transparent?transparentData.append(this.data):triangleData.append(this.data)}}function home(){mat4.identity(rotMat),initProjection(),setProjection(),remesh=!0,redraw=!0}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.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 r=.5*(t[0]+i[0]),n=.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]+r),.5*(this.m0[1]+n),.5*(this.m0[2]+s)],this.m4=[.5*(r+this.m2[0]),.5*(n+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 iszero(e){return 0==e[0]&&0==e[1]&&0==e[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 bezierPP(e,t,i){return[e[0]+i[0]-2*t[0],e[1]+i[1]-2*t[1],e[2]+i[2]-2*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 Straightness(e,t,i,a){let r=[third*(a[0]-e[0]),third*(a[1]-e[1]),third*(a[2]-e[2])];return Math.max(abs2([t[0]-r[0]-e[0],t[1]-r[1]-e[1],t[2]-r[2]-e[2]]),abs2([a[0]-r[0]-i[0],a[1]-r[1]-i[1],a[2]-r[2]-i[2]]))}function Distance2(e,t,i){let a=dot([e[0]-t[0],e[1]-t[1],e[2]-t[2]],i);return a*a}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 COBTarget(e,t){mat4.fromTranslation(translMat,[center.x,center.y,center.z]),mat4.invert(cjMatInv,translMat),mat4.multiply(e,t,cjMatInv),mat4.multiply(e,translMat,e)}function setUniforms(e,t){let i=t==pixelShader;gl.useProgram(t),t.vertexPositionAttribute=gl.getAttribLocation(t,"position"),gl.enableVertexAttribArray(t.vertexPositionAttribute),i&&(t.vertexWidthAttribute=gl.getAttribLocation(t,"width"),gl.enableVertexAttribArray(t.vertexWidthAttribute));let a=t!=noNormalShader&&!i&&Lights.length>0;if(a&&(t.vertexNormalAttribute=gl.getAttribLocation(t,"normal"),gl.enableVertexAttribArray(t.vertexNormalAttribute)),t.vertexMaterialAttribute=gl.getAttribLocation(t,"materialIndex"),-1!=t.vertexMaterialAttribute&&gl.enableVertexAttribArray(t.vertexMaterialAttribute),t.projViewMatUniform=gl.getUniformLocation(t,"projViewMat"),t.viewMatUniform=gl.getUniformLocation(t,"viewMat"),t.normMatUniform=gl.getUniformLocation(t,"normMat"),t!=colorShader&&t!=transparentShader||(t.vertexColorAttribute=gl.getAttribLocation(t,"color"),gl.enableVertexAttribArray(t.vertexColorAttribute)),a)for(let e=0;e<Lights.length;++e)Lights[e].setUniform(t,e);if(-1!=t.vertexMaterialAttribute)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){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();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,r){if(e==i&&t==a)return;let[n,s]=arcball([e,-t],[i,-a]);mat4.fromRotation(rotMats,2*r*ArcballFactor*n/lastzoom,s),mat4.multiply(rotMat,rotMats,rotMat)}function shiftScene(e,t,i,a){let r=1/lastzoom;shift.x+=(i-e)*r*halfCanvasWidth,shift.y-=(a-t)*r*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),Zoom!=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),r=dot(i,a);return r>1?r=1:r<-1&&(r=-1),[Math.acos(r),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 r;switch(i){case DRAGMODE_ROTATE:r=rotateScene;break;case DRAGMODE_SHIFT:r=shiftScene;break;case DRAGMODE_ZOOM:r=zoomScene;break;case DRAGMODE_PAN:r=panScene;break;default:r=((e,t,i,a)=>{})}r((lastMouseX-halfCanvasWidth)/halfCanvasWidth,(lastMouseY-halfCanvasHeight)/halfCanvasHeight,(e-halfCanvasWidth)/halfCanvasWidth,(t-halfCanvasHeight)/halfCanvasHeight,a),lastMouseX=e,lastMouseY=t,setProjection(),redraw=!0}function handleKey(e){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"+":case"=":case">":expand();break;case"-":case"_":case"<":shrink()}t.length>0&&(mat4.rotate(rotMat,rotMat,.1,t),updateViewMatrix(),redraw=!0)}function handleMouseWheel(e){e.preventDefault(),e.deltaY<0?Zoom*=zoomFactor:Zoom/=zoomFactor,capzoom(),setProjection(),redraw=!0}function handleMouseMove(e){if(!mouseDownOrTouchActive)return;let t;processDrag(e.clientX,e.clientY,t=e.getModifierState("Control")?DRAGMODE_SHIFT:e.getModifierState("Shift")?DRAGMODE_ZOOM:e.getModifierState("Alt")?DRAGMODE_PAN:DRAGMODE_ROTATE)}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,r=i-lastMouseY,n=a*a+r*r<=shiftHoldDistance*shiftHoldDistance;if(n&&!swipe&&!rotate&&(new Date).getTime()-touchStartTime>shiftWaitTime&&(navigator.vibrate&&window.navigator.vibrate(vibrateTime),swipe=!0),swipe)processDrag(e,i,DRAGMODE_SHIFT);else if(!n){rotate=!0,processDrag(t[0].pageX,t[0].pageY,DRAGMODE_ROTATE,.5)}}if(pinch&&!swipe&&2==t.length&&touchId==t[0].identifier){let e=pinchDistance(t),i=e-pinchStart;zooming=!0,(i*=zoomPinchFactor)>zoomPinchCap&&(i=zoomPinchCap),i<-zoomPinchCap&&(i=-zoomPinchCap),zoomImage(i/size2),pinchStart=e,swipe=rotate=zooming=!1,setProjection(),redraw=!0}}let pixelShader,noNormalShader,materialShader,colorShader,transparentShader,zbuffer=[];function transformVertices(e){let t=viewMat[2],i=viewMat[6],a=viewMat[10];zbuffer.length=e.length;for(let r=0;r<e.length;++r){let n=6*r;zbuffer[r]=t*e[n]+i*e[n+1]+a*e[n+2]}}function drawMaterial0(){drawBuffer(material0Data,pixelShader),material0Data.clear()}function drawMaterial1(){drawBuffer(material1Data,noNormalShader),material1Data.clear()}function drawMaterial(){drawBuffer(materialData,materialShader),materialData.clear()}function drawColor(){drawBuffer(colorData,colorShader),colorData.clear()}function drawTriangle(){drawBuffer(triangleData,transparentShader),triangleData.clear()}function drawTransparent(){let e=transparentData.indices;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 r=3*i;return 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r=e/t,n=1/lastzoom,s=(i/e+viewportshift[0])*lastzoom,o=(a/t+viewportshift[1])*lastzoom;if(orthographic){let e=B[0]-b[0],t=B[1]-b[1];if(e<t*r){let e=.5*t*r*n,i=2*e*s,a=t*n*o;viewParam.xmin=-e-i,viewParam.xmax=e-i,viewParam.ymin=b[1]*n-a,viewParam.ymax=B[1]*n-a}else{let t=.5*e/(r*Zoom),i=e*n*s,a=2*t*o;viewParam.xmin=b[0]*n-i,viewParam.xmax=B[0]*n-i,viewParam.ymin=-t-a,viewParam.ymax=t-a}}else{let e=H*n,t=e*r,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*angle)*B[2],center.x=center.y=0,center.z=.5*(b[2]+B[2]),lastzoom=Zoom=Zoom0,viewParam.zmin=b[2],viewParam.zmax=B[2],shift.x=shift.y=0}function setViewport(){gl.viewportWidth=canvasWidth,gl.viewportHeight=canvasHeight,gl.viewport(0,0,gl.viewportWidth,gl.viewportHeight),gl.scissor(0,0,gl.viewportWidth,gl.viewportHeight)}function setCanvas(){canvas.width=canvasWidth,canvas.height=canvasHeight,embedded&&(offscreen.width=canvasWidth,offscreen.height=canvasHeight),size2=Math.hypot(canvasWidth,canvasHeight),halfCanvasWidth=.5*canvasWidth,halfCanvasHeight=.5*canvasHeight}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(),home()}function expand(){setsize(canvasWidth*resizeStep+.5,canvasHeight*resizeStep+.5)}function shrink(){setsize(Math.max(canvasWidth/resizeStep+.5,1),Math.max(canvasHeight/resizeStep+.5,1))}function webGLStart(){if(canvas=document.getElementById("Asymptote"),embedded=window.parent.document!=document,initGL(),absolute&&!embedded)canvasWidth*=window.devicePixelRatio,canvasHeight*=window.devicePixelRatio;else{0==canvas.width&&(canvas.width=Math.max(window.innerWidth-windowTrim,windowTrim)),0==canvas.height&&(canvas.height=Math.max(window.innerHeight-windowTrim,windowTrim));let e=canvasWidth/canvasHeight;canvas.width>canvas.height*e?canvas.width=Math.min(canvas.height*e,canvas.width):canvas.height=Math.min(canvas.width/e,canvas.height),canvas.width>0&&(canvasWidth=canvas.width),canvas.height>0&&(canvasHeight=canvas.height)}setCanvas(),ArcballFactor=1+8*Math.hypot(viewportmargin[0],viewportmargin[1])/size2,viewportshift[0]/=Zoom0,viewportshift[1]/=Zoom0,gl.enable(gl.BLEND),gl.blendFunc(gl.SRC_ALPHA,gl.ONE_MINUS_SRC_ALPHA),gl.enable(gl.DEPTH_TEST),gl.enable(gl.SCISSOR_TEST),setViewport(),home(),canvas.onmousedown=handleMouseDown,document.onmouseup=handleMouseUpOrTouchEnd,document.onmousemove=handleMouseMove,canvas.onkeydown=handleKey,canvas.addEventListener("wheel",handleMouseWheel,!1),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),tick()}
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z=1/z,t[0]=(o*I-l*y+h*T)*z,t[1]=(r*y-a*I-n*T)*z,t[2]=(v*S-p*b+g*A)*z,t[3]=(m*b-d*S-f*A)*z,t[4]=(l*P-s*I-h*D)*z,t[5]=(i*I-r*P+n*D)*z,t[6]=(p*w-u*S-g*M)*z,t[7]=(c*S-m*w+f*M)*z,t[8]=(s*y-o*P+h*R)*z,t[9]=(a*P-i*y-n*R)*z,t[10]=(u*b-v*w+g*x)*z,t[11]=(d*w-c*b-f*x)*z,t[12]=(o*D-s*T-l*R)*z,t[13]=(i*T-a*D+r*R)*z,t[14]=(v*M-u*A-p*x)*z,t[15]=(c*A-d*M+m*x)*z,t},e.multiply=r,e.translate=function(t,e,i){var a=i[0],r=i[1],n=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,v=void 0,p=void 0,g=void 0;e===t?(t[12]=e[0]*a+e[4]*r+e[8]*n+e[12],t[13]=e[1]*a+e[5]*r+e[9]*n+e[13],t[14]=e[2]*a+e[6]*r+e[10]*n+e[14],t[15]=e[3]*a+e[7]*r+e[11]*n+e[15]):(s=e[0],o=e[1],l=e[2],h=e[3],c=e[4],d=e[5],m=e[6],f=e[7],u=e[8],v=e[9],p=e[10],g=e[11],t[0]=s,t[1]=o,t[2]=l,t[3]=h,t[4]=c,t[5]=d,t[6]=m,t[7]=f,t[8]=u,t[9]=v,t[10]=p,t[11]=g,t[12]=s*a+c*r+u*n+e[12],t[13]=o*a+d*r+v*n+e[13],t[14]=l*a+m*r+p*n+e[14],t[15]=h*a+f*r+g*n+e[15]);return t},e.rotate=function(t,e,i,r){var n=r[0],s=r[1],o=r[2],l=Math.sqrt(n*n+s*s+o*o),h=void 0,c=void 0,d=void 0,m=void 0,f=void 0,u=void 0,v=void 0,p=void 0,g=void 0,x=void 0,M=void 0,w=void 0,A=void 0,b=void 0,S=void 0,R=void 0,D=void 0,P=void 0,T=void 0,y=void 0,I=void 0,z=void 0,O=void 0,E=void 0;if(Math.abs(l)<a.EPSILON)return null;n*=l=1/l,s*=l,o*=l,h=Math.sin(i),c=Math.cos(i),d=1-c,m=e[0],f=e[1],u=e[2],v=e[3],p=e[4],g=e[5],x=e[6],M=e[7],w=e[8],A=e[9],b=e[10],S=e[11],R=n*n*d+c,D=s*n*d+o*h,P=o*n*d-s*h,T=n*s*d-o*h,y=s*s*d+c,I=o*s*d+n*h,z=n*o*d+s*h,O=s*o*d-n*h,E=o*o*d+c,t[0]=m*R+p*D+w*P,t[1]=f*R+g*D+A*P,t[2]=u*R+x*D+b*P,t[3]=v*R+M*D+S*P,t[4]=m*T+p*y+w*I,t[5]=f*T+g*y+A*I,t[6]=u*T+x*y+b*I,t[7]=v*T+M*y+S*I,t[8]=m*z+p*O+w*E,t[9]=f*z+g*O+A*E,t[10]=u*z+x*O+b*E,t[11]=v*z+M*O+S*E,e!==t&&(t[12]=e[12],t[13]=e[13],t[14]=e[14],t[15]=e[15]);return t},e.fromTranslation=function(t,e){return t[0]=1,t[1]=0,t[2]=0,t[3]=0,t[4]=0,t[5]=1,t[6]=0,t[7]=0,t[8]=0,t[9]=0,t[10]=1,t[11]=0,t[12]=e[0],t[13]=e[1],t[14]=e[2],t[15]=1,t},e.fromRotation=function(t,e,i){var r=i[0],n=i[1],s=i[2],o=Math.sqrt(r*r+n*n+s*s),l=void 0,h=void 0,c=void 0;if(Math.abs(o)<a.EPSILON)return null;return r*=o=1/o,n*=o,s*=o,l=Math.sin(e),h=Math.cos(e),c=1-h,t[0]=r*r*c+h,t[1]=n*r*c+s*l,t[2]=s*r*c-n*l,t[3]=0,t[4]=r*n*c-s*l,t[5]=n*n*c+h,t[6]=s*n*c+r*l,t[7]=0,t[8]=r*s*c+n*l,t[9]=n*s*c-r*l,t[10]=s*s*c+h,t[11]=0,t[12]=0,t[13]=0,t[14]=0,t[15]=1,t},e.frustum=function(t,e,i,a,r,n,s){var o=1/(i-e),l=1/(r-a),h=1/(n-s);return t[0]=2*n*o,t[1]=0,t[2]=0,t[3]=0,t[4]=0,t[5]=2*n*l,t[6]=0,t[7]=0,t[8]=(i+e)*o,t[9]=(r+a)*l,t[10]=(s+n)*h,t[11]=-1,t[12]=0,t[13]=0,t[14]=s*n*2*h,t[15]=0,t},e.ortho=function(t,e,i,a,r,n,s){var o=1/(e-i),l=1/(a-r),h=1/(n-s);return t[0]=-2*o,t[1]=0,t[2]=0,t[3]=0,t[4]=0,t[5]=-2*l,t[6]=0,t[7]=0,t[8]=0,t[9]=0,t[10]=2*h,t[11]=0,t[12]=(e+i)*o,t[13]=(r+a)*l,t[14]=(s+n)*h,t[15]=1,t};var a=function(t){if(t&&t.__esModule)return t;var e={};if(null!=t)for(var i in t)Object.prototype.hasOwnProperty.call(t,i)&&(e[i]=t[i]);return e.default=t,e}(i(0));function r(t,e,i){var a=e[0],r=e[1],n=e[2],s=e[3],o=e[4],l=e[5],h=e[6],c=e[7],d=e[8],m=e[9],f=e[10],u=e[11],v=e[12],p=e[13],g=e[14],x=e[15],M=i[0],w=i[1],A=i[2],b=i[3];return t[0]=M*a+w*o+A*d+b*v,t[1]=M*r+w*l+A*m+b*p,t[2]=M*n+w*h+A*f+b*g,t[3]=M*s+w*c+A*u+b*x,M=i[4],w=i[5],A=i[6],b=i[7],t[4]=M*a+w*o+A*d+b*v,t[5]=M*r+w*l+A*m+b*p,t[6]=M*n+w*h+A*f+b*g,t[7]=M*s+w*c+A*u+b*x,M=i[8],w=i[9],A=i[10],b=i[11],t[8]=M*a+w*o+A*d+b*v,t[9]=M*r+w*l+A*m+b*p,t[10]=M*n+w*h+A*f+b*g,t[11]=M*s+w*c+A*u+b*x,M=i[12],w=i[13],A=i[14],b=i[15],t[12]=M*a+w*o+A*d+b*v,t[13]=M*r+w*l+A*m+b*p,t[14]=M*n+w*h+A*f+b*g,t[15]=M*s+w*c+A*u+b*x,t}}])});let canvasWidth,canvasHeight,b,B,angle,Zoom0,viewportmargin,zoomFactor,zoomPinchFactor,zoomPinchCap,zoomStep,shiftHoldDistance,shiftWaitTime,vibrateTime,embedded,canvas,gl,alpha,offscreen,context,maxMaterials,halfCanvasWidth,halfCanvasHeight,Zoom,P=[],Materials=[],Lights=[],Centers=[],Background=[1,1,1,1],absolute=!1,viewportshift=[0,0],nlights=0,Nmaterials=2,materials=[],pixel=.75,BezierFactor=.4,FillFactor=.1,maxViewportWidth=window.innerWidth,maxViewportHeight=window.innerHeight;const windowTrim=10;let lastzoom,H,zmin,zmax,size2,ArcballFactor,positionBuffer,materialBuffer,colorBuffer,indexBuffer,resizeStep=1.2,Fuzz2=1e3*Number.EPSILON,Fuzz4=Fuzz2*Fuzz2,third=1/3,rotMat=mat4.create(),projMat=mat4.create(),viewMat=mat4.create(),projViewMat=mat4.create(),normMat=mat3.create(),viewMat3=mat3.create(),rotMats=mat4.create(),cjMatInv=mat4.create(),translMat=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},redraw=!0,remesh=!0,mouseDownOrTouchActive=!1,lastMouseX=null,lastMouseY=null,touchID=null,Positions=[],Normals=[],Colors=[],Indices=[];class Material{constructor(t,e,i,a,r,n){this.diffuse=t,this.emissive=e,this.specular=i,this.shininess=a,this.metallic=r,this.fresnel0=n}setUniform(t,e){let i=i=>gl.getUniformLocation(t,"Materials["+e+"]."+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,enumPointLight=1,enumDirectionalLight=2;class Light{constructor(t,e){this.direction=t,this.color=e}setUniform(t,e){let i=i=>gl.getUniformLocation(t,"Lights["+e+"]."+i);gl.uniform3fv(i("direction"),new Float32Array(this.direction)),gl.uniform3fv(i("color"),new Float32Array(this.color))}}function initShaders(){let t=gl.getParameter(gl.MAX_VERTEX_UNIFORM_VECTORS);maxMaterials=Math.floor((t-14)/4),Nmaterials=Math.min(Math.max(Nmaterials,Materials.length),maxMaterials),noNormalShader=initShader(),pixelShader=initShader(["WIDTH"]),materialShader=initShader(["NORMAL"]),colorShader=initShader(["NORMAL","COLOR"]),transparentShader=initShader(["NORMAL","COLOR","TRANSPARENT"])}function setBuffers(){positionBuffer=gl.createBuffer(),materialBuffer=gl.createBuffer(),colorBuffer=gl.createBuffer(),indexBuffer=gl.createBuffer()}function noGL(){gl||alert("Could not initialize WebGL")}function saveAttributes(){let t=window.parent.document.asygl[alpha];t.gl=gl,t.nlights=Lights.length,t.Nmaterials=Nmaterials,t.maxMaterials=maxMaterials,t.noNormalShader=noNormalShader,t.pixelShader=pixelShader,t.materialShader=materialShader,t.colorShader=colorShader,t.transparentShader=transparentShader}function restoreAttributes(){let t=window.parent.document.asygl[alpha];gl=t.gl,nlights=t.nlights,Nmaterials=t.Nmaterials,maxMaterials=t.maxMaterials,noNormalShader=t.noNormalShader,pixelShader=t.pixelShader,materialShader=t.materialShader,colorShader=t.colorShader,transparentShader=t.transparentShader}function initGL(){if(alpha=Background[3]<1,embedded){let t=window.parent.document;null==t.asygl&&(t.asygl=Array(2)),context=canvas.getContext("2d"),(offscreen=t.offscreen)||(offscreen=t.createElement("canvas"),t.offscreen=offscreen),t.asygl[alpha]&&t.asygl[alpha].gl?(restoreAttributes(),(Lights.length!=nlights||Math.min(Materials.length,maxMaterials)>Nmaterials)&&(initShaders(),saveAttributes())):((gl=offscreen.getContext("webgl",{alpha:alpha}))||noGL(),initShaders(),t.asygl[alpha]={},saveAttributes())}else(gl=canvas.getContext("webgl",{alpha:alpha}))||noGL(),initShaders();setBuffers(),indexExt=gl.getExtension("OES_element_index_uint")}function getShader(t,e,i,a=[]){let r=`#version 100\n#ifdef GL_FRAGMENT_PRECISION_HIGH\n  precision highp float;\n#else\n  precision mediump float;\n#endif\n  #define nlights ${Lights.length}\n\n  const int Nlights=${Math.max(Lights.length,1)};\n\n  #define Nmaterials ${Nmaterials}\n`;orthographic&&(r+="#define ORTHOGRAPHIC\n"),a.forEach(t=>r+="#define "+t+"\n");let n=t.createShader(i);return t.shaderSource(n,r+e),t.compileShader(n),t.getShaderParameter(n,t.COMPILE_STATUS)?n:(alert(t.getShaderInfoLog(n)),null)}function drawBuffer(t,e,i=t.indices){if(0==t.indices.length)return;let a=e==pixelShader,r=e!=noNormalShader&&!a;setUniforms(t,e),gl.bindBuffer(gl.ARRAY_BUFFER,positionBuffer),gl.bufferData(gl.ARRAY_BUFFER,new Float32Array(t.vertices),gl.STATIC_DRAW),gl.vertexAttribPointer(positionAttribute,3,gl.FLOAT,!1,r?24:a?16:12,0),r&&Lights.length>0?gl.vertexAttribPointer(normalAttribute,3,gl.FLOAT,!1,24,12):a&&gl.vertexAttribPointer(widthAttribute,1,gl.FLOAT,!1,16,12),gl.bindBuffer(gl.ARRAY_BUFFER,materialBuffer),gl.bufferData(gl.ARRAY_BUFFER,new Int16Array(t.materialIndices),gl.STATIC_DRAW),gl.vertexAttribPointer(materialAttribute,1,gl.SHORT,!1,2,0),e!=colorShader&&e!=transparentShader||(gl.bindBuffer(gl.ARRAY_BUFFER,colorBuffer),gl.bufferData(gl.ARRAY_BUFFER,new Uint8Array(t.colors),gl.STATIC_DRAW),gl.vertexAttribPointer(colorAttribute,4,gl.UNSIGNED_BYTE,!0,0,0)),gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER,indexBuffer),gl.bufferData(gl.ELEMENT_ARRAY_BUFFER,indexExt?new Uint32Array(i):new Uint16Array(i),gl.STATIC_DRAW),gl.drawElements(r?gl.TRIANGLES:a?gl.POINTS:gl.LINES,i.length,indexExt?gl.UNSIGNED_INT:gl.UNSIGNED_SHORT,0)}class vertexBuffer{constructor(){this.clear()}clear(){this.vertices=[],this.materialIndices=[],this.colors=[],this.indices=[],this.nvertices=0,this.materials=[],this.materialTable=[]}vertex(t,e){return this.vertices.push(t[0]),this.vertices.push(t[1]),this.vertices.push(t[2]),this.vertices.push(e[0]),this.vertices.push(e[1]),this.vertices.push(e[2]),this.materialIndices.push(materialIndex),this.nvertices++}Vertex(t,e,i=[0,0,0,0]){return this.vertices.push(t[0]),this.vertices.push(t[1]),this.vertices.push(t[2]),this.vertices.push(e[0]),this.vertices.push(e[1]),this.vertices.push(e[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++}vertex1(t){return this.vertices.push(t[0]),this.vertices.push(t[1]),this.vertices.push(t[2]),this.materialIndices.push(materialIndex),this.nvertices++}vertex0(t,e){return this.vertices.push(t[0]),this.vertices.push(t[1]),this.vertices.push(t[2]),this.vertices.push(e),this.materialIndices.push(materialIndex),this.nvertices++}iVertex(t,e,i,a=[0,0,0,0]){let r=6*t;this.vertices[r]=e[0],this.vertices[r+1]=e[1],this.vertices[r+2]=e[2],this.vertices[r+3]=i[0],this.vertices[r+4]=i[1],this.vertices[r+5]=i[2],this.materialIndices[t]=materialIndex;let n=4*t;this.colors[n]=a[0],this.colors[n+1]=a[1],this.colors[n+2]=a[2],this.colors[n+3]=a[3],this.indices.push(t)}append(t){append(this.vertices,t.vertices),append(this.materialIndices,t.materialIndices),append(this.colors,t.colors),appendOffset(this.indices,t.indices,this.nvertices),this.nvertices+=t.nvertices}}let materialIndex,material0Data=new vertexBuffer,material1Data=new vertexBuffer,materialData=new vertexBuffer,colorData=new vertexBuffer,transparentData=new vertexBuffer,triangleData=new vertexBuffer;function append(t,e){let i=t.length,a=e.length;t.length+=a;for(let r=0;r<a;++r)t[i+r]=e[r]}function appendOffset(t,e,i){let a=t.length,r=e.length;t.length+=e.length;for(let n=0;n<r;++n)t[a+n]=e[n]+i}class Geometry{constructor(){this.data=new vertexBuffer,this.Onscreen=!1,this.m=[]}offscreen(t){let e=projViewMat,i=t[0],a=i[0],r=i[1],n=i[2],s=1/(e[3]*a+e[7]*r+e[11]*n+e[15]);this.x=this.X=(e[0]*a+e[4]*r+e[8]*n+e[12])*s,this.y=this.Y=(e[1]*a+e[5]*r+e[9]*n+e[13])*s;for(let i=1,a=t.length;i<a;++i){let a=t[i],r=a[0],n=a[1],s=a[2],o=1/(e[3]*r+e[7]*n+e[11]*s+e[15]),l=(e[0]*r+e[4]*n+e[8]*s+e[12])*o,h=(e[1]*r+e[5]*n+e[9]*s+e[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(t){let e=this.c[0],i=this.c[1],a=this.c[2],r=t[0]-e,n=t[1]-i,s=t[2]-a;return[r*normMat[0]+n*normMat[3]+s*normMat[6]+e,r*normMat[1]+n*normMat[4]+s*normMat[7]+i,r*normMat[2]+n*normMat[5]+s*normMat[8]+a]}Tcorners(t,e){return[this.T(t),this.T([t[0],t[1],e[2]]),this.T([t[0],e[1],t[2]]),this.T([t[0],e[1],e[2]]),this.T([e[0],t[1],t[2]]),this.T([e[0],t[1],e[2]]),this.T([e[0],e[1],t[2]]),this.T(e)]}setMaterial(t,e){null==t.materialTable[this.MaterialIndex]&&(t.materials.length>=Nmaterials&&e(),t.materialTable[this.MaterialIndex]=t.materials.length,t.materials.push(Materials[this.MaterialIndex])),materialIndex=t.materialTable[this.MaterialIndex]}render(){let t;if(this.setMaterialIndex(),0==this.CenterIndex?t=corners(this.Min,this.Max):(this.c=Centers[this.CenterIndex-1],t=this.Tcorners(this.Min,this.Max)),this.offscreen(t))return void this.data.clear();let e,i=this.controlpoints;if(0==this.CenterIndex){if(!remesh&&this.Onscreen)return void this.append();e=i}else{let t=i.length;e=Array(t);for(let a=0;a<t;++a)e[a]=this.T(i[a])}let a=orthographic?1:this.Min[2]/B[2],r=pixel*Math.hypot(a*(viewParam.xmax-viewParam.xmin),a*(viewParam.ymax-viewParam.ymin))/size2;this.res2=r*r,this.Epsilon=FillFactor*r,this.data.clear(),this.Onscreen=!0,this.process(e)}}class BezierPatch extends Geometry{constructor(t,e,i,a,r,n){super(),this.controlpoints=t,this.Min=a,this.Max=r,this.color=n,this.CenterIndex=e;let s=t.length;if(n){let t=n[0][3]+n[1][3]+n[2][3];this.transparent=16==s||4==s?t+n[3][3]<1020:t<765}else this.transparent=Materials[i].diffuse[3]<1;this.MaterialIndex=i,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(t){let e=t[0];this.epsilon=0;let i=t.length;for(let a=1;a<i;++a)this.epsilon=Math.max(this.epsilon,abs2([t[a][0]-e[0],t[a][1]-e[1],t[a][2]-e[2]]));this.epsilon*=Fuzz4}processTriangle(t){let e=t[0],i=t[1],a=t[2],r=unit(cross([i[0]-e[0],i[1]-e[1],i[2]-e[2]],[a[0]-e[0],a[1]-e[1],a[2]-e[2]]));this.offscreen([e,i,a])||(this.color?(this.data.indices.push(this.data.Vertex(e,r,this.color[0])),this.data.indices.push(this.data.Vertex(i,r,this.color[1])),this.data.indices.push(this.data.Vertex(a,r,this.color[2]))):(this.data.indices.push(this.vertex(e,r)),this.data.indices.push(this.vertex(i,r)),this.data.indices.push(this.vertex(a,r))),this.append())}processQuad(t){let e=t[0],i=t[1],a=t[2],r=t[3],n=cross([i[0]-e[0],i[1]-e[1],i[2]-e[2]],[a[0]-i[0],a[1]-i[1],a[2]-i[2]]),s=cross([a[0]-r[0],a[1]-r[1],a[2]-r[2]],[r[0]-e[0],r[1]-e[1],r[2]-e[2]]),o=unit([n[0]+s[0],n[1]+s[1],n[2]+s[2]]);if(!this.offscreen([e,i,a,r])){let t,n,s,l;this.color?(t=this.data.Vertex(e,o,this.color[0]),n=this.data.Vertex(i,o,this.color[1]),s=this.data.Vertex(a,o,this.color[2]),l=this.data.Vertex(r,o,this.color[3])):(t=this.vertex(e,o),n=this.vertex(i,o),s=this.vertex(a,o),l=this.vertex(r,o)),this.data.indices.push(t),this.data.indices.push(n),this.data.indices.push(s),this.data.indices.push(t),this.data.indices.push(s),this.data.indices.push(l),this.append()}}process(t){if(this.transparent&&(materialIndex=this.color?-1-materialIndex:1+materialIndex),10==t.length)return this.process3(t);if(3==t.length)return this.processTriangle(t);if(4==t.length)return this.processQuad(t);let e=t[0],i=t[3],a=t[12],r=t[15],n=this.normal(i,t[2],t[1],e,t[4],t[8],a);iszero(n)&&iszero(n=this.normal(i,t[2],t[1],e,t[13],t[14],r))&&(n=this.normal(r,t[11],t[7],i,t[4],t[8],a));let s=this.normal(e,t[4],t[8],a,t[13],t[14],r);iszero(s)&&iszero(s=this.normal(e,t[4],t[8],a,t[11],t[7],i))&&(s=this.normal(i,t[2],t[1],e,t[13],t[14],r));let o=this.normal(a,t[13],t[14],r,t[11],t[7],i);iszero(o)&&iszero(o=this.normal(a,t[13],t[14],r,t[2],t[1],e))&&(o=this.normal(e,t[4],t[8],a,t[11],t[7],i));let l=this.normal(r,t[11],t[7],i,t[2],t[1],e);if(iszero(l)&&iszero(l=this.normal(r,t[11],t[7],i,t[4],t[8],a))&&(l=this.normal(a,t[13],t[14],r,t[2],t[1],e)),this.color){let h=this.color[0],c=this.color[1],d=this.color[2],m=this.color[3],f=this.data.Vertex(e,n,h),u=this.data.Vertex(a,s,c),v=this.data.Vertex(r,o,d),p=this.data.Vertex(i,l,m);this.Render(t,f,u,v,p,e,a,r,i,!1,!1,!1,!1,h,c,d,m)}else{let h=this.vertex(e,n),c=this.vertex(a,s),d=this.vertex(r,o),m=this.vertex(i,l);this.Render(t,h,c,d,m,e,a,r,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)}Render(t,e,i,a,r,n,s,o,l,h,c,d,m,f,u,v,p){if(this.Distance(t)<this.res2)this.offscreen([n,s,o])||(this.data.indices.push(e),this.data.indices.push(i),this.data.indices.push(a)),this.offscreen([n,o,l])||(this.data.indices.push(e),this.data.indices.push(a),this.data.indices.push(r));else{if(this.offscreen(t))return;let g=t[0],x=t[3],M=t[12],w=t[15],A=new Split3(g,t[1],t[2],x),b=new Split3(t[4],t[5],t[6],t[7]),S=new Split3(t[8],t[9],t[10],t[11]),R=new Split3(M,t[13],t[14],w),D=new Split3(g,t[4],t[8],M),P=new Split3(A.m0,b.m0,S.m0,R.m0),T=new Split3(A.m3,b.m3,S.m3,R.m3),y=new Split3(A.m5,b.m5,S.m5,R.m5),I=new Split3(A.m4,b.m4,S.m4,R.m4),z=new Split3(A.m2,b.m2,S.m2,R.m2),O=new Split3(x,t[7],t[11],w),E=[g,A.m0,A.m3,A.m5,D.m0,P.m0,T.m0,y.m0,D.m3,P.m3,T.m3,y.m3,D.m5,P.m5,T.m5,y.m5],_=[D.m5,P.m5,T.m5,y.m5,D.m4,P.m4,T.m4,y.m4,D.m2,P.m2,T.m2,y.m2,M,R.m0,R.m3,R.m5],L=[y.m5,I.m5,z.m5,O.m5,y.m4,I.m4,z.m4,O.m4,y.m2,I.m2,z.m2,O.m2,R.m5,R.m4,R.m2,w],N=[A.m5,A.m4,A.m2,x,y.m0,I.m0,z.m0,O.m0,y.m3,I.m3,z.m3,O.m3,y.m5,I.m5,z.m5,O.m5],B=E[15],C=this.normal(E[0],E[4],E[8],E[12],E[13],E[14],E[15]);iszero(C)&&iszero(C=this.normal(E[0],E[4],E[8],E[12],E[11],E[7],E[3]))&&(C=this.normal(E[3],E[2],E[1],E[0],E[13],E[14],E[15]));let F=this.normal(_[12],_[13],_[14],_[15],_[11],_[7],_[3]);iszero(F)&&iszero(F=this.normal(_[12],_[13],_[14],_[15],_[2],_[1],_[0]))&&(F=this.normal(_[0],_[4],_[8],_[12],_[11],_[7],_[3]));let V=this.normal(L[15],L[11],L[7],L[3],L[2],L[1],L[0]);iszero(V)&&iszero(V=this.normal(L[15],L[11],L[7],L[3],L[4],L[8],L[12]))&&(V=this.normal(L[12],L[13],L[14],L[15],L[2],L[1],L[0]));let H=this.normal(N[3],N[2],N[1],N[0],N[4],N[8],N[12]);iszero(H)&&iszero(H=this.normal(N[3],N[2],N[1],N[0],N[13],N[14],N[15]))&&(H=this.normal(N[15],N[11],N[7],N[3],N[4],N[8],N[12]));let G=this.normal(L[3],L[2],L[1],B,L[4],L[8],L[12]),U=this.Epsilon,W=[.5*(n[0]+s[0]),.5*(n[1]+s[1]),.5*(n[2]+s[2])];if(!h)if(h=Straightness(g,t[4],t[8],M)<this.res2){let t=unit(this.derivative(_[0],_[1],_[2],_[3]));W=[W[0]-U*t[0],W[1]-U*t[1],W[2]-U*t[2]]}else W=E[12];let Y=[.5*(s[0]+o[0]),.5*(s[1]+o[1]),.5*(s[2]+o[2])];if(!c)if(c=Straightness(M,t[13],t[14],w)<this.res2){let t=unit(this.derivative(L[12],L[8],L[4],L[0]));Y=[Y[0]-U*t[0],Y[1]-U*t[1],Y[2]-U*t[2]]}else Y=_[15];let j=[.5*(o[0]+l[0]),.5*(o[1]+l[1]),.5*(o[2]+l[2])];if(!d)if(d=Straightness(w,t[11],t[7],x)<this.res2){let t=unit(this.derivative(N[15],L[14],L[13],_[12]));j=[j[0]-U*t[0],j[1]-U*t[1],j[2]-U*t[2]]}else j=L[3];let k=[.5*(l[0]+n[0]),.5*(l[1]+n[1]),.5*(l[2]+n[2])];if(!m)if(m=Straightness(g,t[1],t[2],x)<this.res2){let t=unit(this.derivative(E[3],E[7],E[11],E[15]));k=[k[0]-U*t[0],k[1]-U*t[1],k[2]-U*t[2]]}else k=N[0];if(f){let t=Array(4),g=Array(4),x=Array(4),M=Array(4),w=Array(4);for(let e=0;e<4;++e)t[e]=.5*(f[e]+u[e]),g[e]=.5*(u[e]+v[e]),x[e]=.5*(v[e]+p[e]),M[e]=.5*(p[e]+f[e]),w[e]=.5*(t[e]+x[e]);let A=this.data.Vertex(W,C,t),b=this.data.Vertex(Y,F,g),S=this.data.Vertex(j,V,x),R=this.data.Vertex(k,H,M),D=this.data.Vertex(B,G,w);this.Render(E,e,A,D,R,n,W,B,k,h,!1,!1,m,f,t,w,M),this.Render(_,A,i,b,D,W,s,Y,B,h,c,!1,!1,t,u,g,w),this.Render(L,D,b,a,S,B,Y,o,j,!1,c,d,!1,w,g,v,x),this.Render(N,R,D,S,r,k,B,j,l,!1,!1,d,m,M,w,x,p)}else{let t=this.vertex(W,C),f=this.vertex(Y,F),u=this.vertex(j,V),v=this.vertex(k,H),p=this.vertex(B,G);this.Render(E,e,t,p,v,n,W,B,k,h,!1,!1,m),this.Render(_,t,i,f,p,W,s,Y,B,h,c,!1,!1),this.Render(L,p,f,a,u,B,Y,o,j,!1,c,d,!1),this.Render(N,v,p,u,r,k,B,j,l,!1,!1,d,m)}}}process3(t){this.Res2=BezierFactor*BezierFactor*this.res2;let e=t[0],i=t[6],a=t[9],r=this.normal(a,t[5],t[2],e,t[1],t[3],i),n=this.normal(e,t[1],t[3],i,t[7],t[8],a),s=this.normal(i,t[7],t[8],a,t[5],t[2],e);if(this.color){let o=this.color[0],l=this.color[1],h=this.color[2],c=this.data.Vertex(e,r,o),d=this.data.Vertex(i,n,l),m=this.data.Vertex(a,s,h);this.Render3(t,c,d,m,e,i,a,!1,!1,!1,o,l,h)}else{let o=this.vertex(e,r),l=this.vertex(i,n),h=this.vertex(a,s);this.Render3(t,o,l,h,e,i,a,!1,!1,!1)}this.data.indices.length>0&&this.append()}Render3(t,e,i,a,r,n,s,o,l,h,c,d,m){if(this.Distance3(t)<this.Res2)this.offscreen([r,n,s])||(this.data.indices.push(e),this.data.indices.push(i),this.data.indices.push(a));else{if(this.offscreen(t))return;let f=t[0],u=t[1],v=t[2],p=t[3],g=t[4],x=t[5],M=t[6],w=t[7],A=t[8],b=t[9],S=[.5*(b[0]+x[0]),.5*(b[1]+x[1]),.5*(b[2]+x[2])],R=[.5*(b[0]+A[0]),.5*(b[1]+A[1]),.5*(b[2]+A[2])],D=[.5*(x[0]+v[0]),.5*(x[1]+v[1]),.5*(x[2]+v[2])],P=[.5*(A[0]+g[0]),.5*(A[1]+g[1]),.5*(A[2]+g[2])],T=[.5*(A[0]+w[0]),.5*(A[1]+w[1]),.5*(A[2]+w[2])],y=[.5*(v[0]+g[0]),.5*(v[1]+g[1]),.5*(v[2]+g[2])],I=[.5*(v[0]+f[0]),.5*(v[1]+f[1]),.5*(v[2]+f[2])],z=[.5*(g[0]+p[0]),.5*(g[1]+p[1]),.5*(g[2]+p[2])],O=[.5*(w[0]+M[0]),.5*(w[1]+M[1]),.5*(w[2]+M[2])],E=[.5*(f[0]+u[0]),.5*(f[1]+u[1]),.5*(f[2]+u[2])],_=[.5*(u[0]+p[0]),.5*(u[1]+p[1]),.5*(u[2]+p[2])],L=[.5*(p[0]+M[0]),.5*(p[1]+M[1]),.5*(p[2]+M[2])],N=[.5*(S[0]+D[0]),.5*(S[1]+D[1]),.5*(S[2]+D[2])],B=[.5*(R[0]+T[0]),.5*(R[1]+T[1]),.5*(R[2]+T[2])],C=[.5*(D[0]+I[0]),.5*(D[1]+I[1]),.5*(D[2]+I[2])],F=[.5*P[0]+.25*(g[0]+u[0]),.5*P[1]+.25*(g[1]+u[1]),.5*P[2]+.25*(g[2]+u[2])],V=[.5*(T[0]+O[0]),.5*(T[1]+O[1]),.5*(T[2]+O[2])],H=[.5*y[0]+.25*(g[0]+w[0]),.5*y[1]+.25*(g[1]+w[1]),.5*y[2]+.25*(g[2]+w[2])],G=[.25*(x[0]+g[0])+.5*z[0],.25*(x[1]+g[1])+.5*z[1],.25*(x[2]+g[2])+.5*z[2]],U=[.5*(E[0]+_[0]),.5*(E[1]+_[1]),.5*(E[2]+_[2])],W=[.5*(_[0]+L[0]),.5*(_[1]+L[1]),.5*(_[2]+L[2])],Y=[.5*(H[0]+U[0]),.5*(H[1]+U[1]),.5*(H[2]+U[2])],j=[.5*(H[0]+W[0]),.5*(H[1]+W[1]),.5*(H[2]+W[2])],k=[.5*(U[0]+W[0]),.5*(U[1]+W[1]),.5*(U[2]+W[2])],X=[.5*(G[0]+V[0]),.5*(G[1]+V[1]),.5*(G[2]+V[2])],Z=[.5*(B[0]+G[0]),.5*(B[1]+G[1]),.5*(B[2]+G[2])],q=[.5*(B[0]+V[0]),.5*(B[1]+V[1]),.5*(B[2]+V[2])],K=[.5*(N[0]+F[0]),.5*(N[1]+F[1]),.5*(N[2]+F[2])],$=[.5*(C[0]+F[0]),.5*(C[1]+F[1]),.5*(C[2]+F[2])],Q=[.5*(N[0]+C[0]),.5*(N[1]+C[1]),.5*(N[2]+C[2])],J=[f,E,I,U,[.5*(y[0]+E[0]),.5*(y[1]+E[1]),.5*(y[2]+E[2])],C,k,Y,$,Q],tt=[k,W,j,L,[.5*(z[0]+O[0]),.5*(z[1]+O[1]),.5*(z[2]+O[2])],X,M,O,V,q],et=[Q,K,N,Z,[.5*(S[0]+P[0]),.5*(S[1]+P[1]),.5*(S[2]+P[2])],S,q,B,R,b],it=[q,Z,X,K,[.25*(D[0]+T[0]+_[0]+g[0]),.25*(D[1]+T[1]+_[1]+g[1]),.25*(D[2]+T[2]+_[2]+g[2])],j,Q,$,Y,k],at=this.normal(k,j,X,q,Z,K,Q),rt=this.normal(q,Z,K,Q,$,Y,k),nt=this.normal(Q,$,Y,k,j,X,q),st=this.Epsilon,ot=[.5*(n[0]+s[0]),.5*(n[1]+s[1]),.5*(n[2]+s[2])];if(!o)if(o=Straightness(M,w,A,b)<this.res2){let t=unit(this.sumderivative(it[0],it[2],it[5],it[9],it[1],it[3],it[6]));ot=[ot[0]-st*t[0],ot[1]-st*t[1],ot[2]-st*t[2]]}else ot=q;let lt=[.5*(s[0]+r[0]),.5*(s[1]+r[1]),.5*(s[2]+r[2])];if(!l)if(l=Straightness(f,v,x,b)<this.res2){let t=unit(this.sumderivative(it[6],it[3],it[1],it[0],it[7],it[8],it[9]));lt=[lt[0]-st*t[0],lt[1]-st*t[1],lt[2]-st*t[2]]}else lt=Q;let ht=[.5*(r[0]+n[0]),.5*(r[1]+n[1]),.5*(r[2]+n[2])];if(!h)if(h=Straightness(f,u,p,M)<this.res2){let t=unit(this.sumderivative(it[9],it[8],it[7],it[6],it[5],it[2],it[0]));ht=[ht[0]-st*t[0],ht[1]-st*t[1],ht[2]-st*t[2]]}else ht=k;if(c){let t=Array(4),f=Array(4),u=Array(4);for(let e=0;e<4;++e)t[e]=.5*(d[e]+m[e]),f[e]=.5*(m[e]+c[e]),u[e]=.5*(c[e]+d[e]);let v=this.data.Vertex(ot,at,t),p=this.data.Vertex(lt,rt,f),g=this.data.Vertex(ht,nt,u);this.Render3(J,e,g,p,r,ht,lt,!1,l,h,c,u,f),this.Render3(tt,g,i,v,ht,n,ot,o,!1,h,u,d,t),this.Render3(et,p,v,a,lt,ot,s,o,l,!1,f,t,m),this.Render3(it,v,p,g,ot,lt,ht,!1,!1,!1,t,f,u)}else{let t=this.vertex(ot,at),c=this.vertex(lt,rt),d=this.vertex(ht,nt);this.Render3(J,e,d,c,r,ht,lt,!1,l,h),this.Render3(tt,d,i,t,ht,n,ot,o,!1,h),this.Render3(et,c,t,a,lt,ot,s,o,l,!1),this.Render3(it,t,c,d,ot,lt,ht,!1,!1,!1)}}}Distance(t){let e=t[0],i=t[3],a=t[12],r=t[15],n=Distance2(r,e,this.normal(i,t[2],t[1],e,t[4],t[8],a));return n=Math.max(n,Straightness(e,t[1],t[2],i)),n=Math.max(n,Straightness(e,t[4],t[8],a)),n=Math.max(n,Straightness(i,t[7],t[11],r)),n=Math.max(n,Straightness(a,t[13],t[14],r)),n=Math.max(n,Straightness(t[4],t[5],t[6],t[7])),n=Math.max(n,Straightness(t[8],t[9],t[10],t[11])),n=Math.max(n,Straightness(t[1],t[5],t[9],t[13])),Math.max(n,Straightness(t[2],t[6],t[10],t[14]))}Distance3(t){let e=t[0],i=t[4],a=t[6],r=t[9],n=abs2([(e[0]+a[0]+r[0])*third-i[0],(e[1]+a[1]+r[1])*third-i[1],(e[2]+a[2]+r[2])*third-i[2]]);return n=Math.max(n,Straightness(e,t[1],t[3],a)),n=Math.max(n,Straightness(e,t[2],t[5],r)),Math.max(n,Straightness(a,t[7],t[8],r))}derivative(t,e,i,a){let r=[e[0]-t[0],e[1]-t[1],e[2]-t[2]];if(abs2(r)>this.epsilon)return r;let n=bezierPP(t,e,i);return abs2(n)>this.epsilon?n:bezierPPP(t,e,i,a)}sumderivative(t,e,i,a,r,n,s){let o=this.derivative(t,e,i,a),l=this.derivative(t,r,n,s);return[o[0]+l[0],o[1]+l[1],o[2]+l[2]]}normal(t,e,i,a,r,n,s){let o=r[0]-a[0],l=r[1]-a[1],h=r[2]-a[2],c=i[0]-a[0],d=i[1]-a[1],m=i[2]-a[2],f=[l*m-h*d,h*c-o*m,o*d-l*c];if(abs2(f)>this.epsilon)return unit(f);let u=[c,d,m],v=[o,l,h],p=bezierPP(a,i,e),g=bezierPP(a,r,n),x=cross(g,u),M=cross(v,p);if(abs2(f=[x[0]+M[0],x[1]+M[1],x[2]+M[2]])>this.epsilon)return unit(f);let w=bezierPPP(a,i,e,t),A=bezierPPP(a,r,n,s);x=cross(g,p),M=cross(v,w);let b=cross(A,u),S=cross(A,p),R=cross(g,w),D=cross(A,w);return unit([9*x[0]+3*(M[0]+b[0]+S[0]+R[0])+D[0],9*x[1]+3*(M[1]+b[1]+S[1]+R[1])+D[1],9*x[2]+3*(M[2]+b[2]+S[2]+R[2])+D[2]])}}class BezierCurve extends Geometry{constructor(t,e,i,a,r){super(),this.controlpoints=t,this.Min=a,this.Max=r,this.CenterIndex=e,this.MaterialIndex=i}setMaterialIndex(){this.setMaterial(material1Data,drawMaterial1)}processLine(t){let e=t[0],i=t[1];this.offscreen([e,i])||(this.data.indices.push(this.data.vertex1(e)),this.data.indices.push(this.data.vertex1(i)),this.append())}process(t){if(2==t.length)return this.processLine(t);let e=this.data.vertex1(t[0]),i=this.data.vertex1(t[3]);this.Render(t,e,i),this.data.indices.length>0&&this.append()}append(){material1Data.append(this.data)}Render(t,e,i){let a=t[0],r=t[1],n=t[2],s=t[3];if(Straightness(a,r,n,s)<this.res2)this.offscreen([a,s])||(this.data.indices.push(e),this.data.indices.push(i));else{if(this.offscreen(t))return;let o=[.5*(a[0]+r[0]),.5*(a[1]+r[1]),.5*(a[2]+r[2])],l=[.5*(r[0]+n[0]),.5*(r[1]+n[1]),.5*(r[2]+n[2])],h=[.5*(n[0]+s[0]),.5*(n[1]+s[1]),.5*(n[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],v=this.data.vertex1(m);this.Render(f,e,v),this.Render(u,v,i)}}}class Pixel extends Geometry{constructor(t,e,i,a,r){super(),this.controlpoint=t,this.width=e,this.CenterIndex=0,this.MaterialIndex=i,this.Min=a,this.Max=r}setMaterialIndex(){this.setMaterial(material0Data,drawMaterial0)}process(t){this.data.indices.push(this.data.vertex0(this.controlpoint,this.width)),this.append()}append(){material0Data.append(this.data)}}class Triangles extends Geometry{constructor(t,e,i){super(),this.CenterIndex=0,this.MaterialIndex=t,this.Min=e,this.Max=i,this.Positions=Positions,this.Normals=Normals,this.Colors=Colors,this.Indices=Indices,Positions=[],Normals=[],Colors=[],Indices=[],this.transparent=Materials[t].diffuse[3]<1}setMaterialIndex(){this.transparent?this.setMaterial(transparentData,drawTransparent):this.setMaterial(triangleData,drawTriangle)}process(t){materialIndex=this.Colors.length>0?-1-materialIndex:1+materialIndex;for(let t=0,e=this.Indices.length;t<e;++t){let e=this.Indices[t],i=e[0],a=this.Positions[i[0]],r=this.Positions[i[1]],n=this.Positions[i[2]];if(!this.offscreen([a,r,n])){let t=e.length>1?e[1]:i;if(t&&0!=t.length||(t=i),this.Colors.length>0){let s=e.length>2?e[2]:i;s&&0!=s.length||(s=i);let o=this.Colors[s[0]],l=this.Colors[s[1]],h=this.Colors[s[2]];this.transparent|=o[3]+l[3]+h[3]<765,this.data.iVertex(i[0],a,this.Normals[t[0]],o),this.data.iVertex(i[1],r,this.Normals[t[1]],l),this.data.iVertex(i[2],n,this.Normals[t[2]],h)}else this.data.iVertex(i[0],a,this.Normals[t[0]]),this.data.iVertex(i[1],r,this.Normals[t[1]]),this.data.iVertex(i[2],n,this.Normals[t[2]])}}this.data.nvertices=this.Positions.length,this.data.indices.length>0&&this.append()}append(){this.transparent?transparentData.append(this.data):triangleData.append(this.data)}}function home(){mat4.identity(rotMat),initProjection(),setProjection(),remesh=!0,redraw=!0}let positionAttribute=0,normalAttribute=1,materialAttribute=2,colorAttribute=3,widthAttribute=4;function initShader(t=[]){let e=getShader(gl,vertex,gl.VERTEX_SHADER,t),i=getShader(gl,fragment,gl.FRAGMENT_SHADER,t),a=gl.createProgram();return gl.attachShader(a,e),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(t,e,i,a){this.m0=[.5*(t[0]+e[0]),.5*(t[1]+e[1]),.5*(t[2]+e[2])];let r=.5*(e[0]+i[0]),n=.5*(e[1]+i[1]),s=.5*(e[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]+r),.5*(this.m0[1]+n),.5*(this.m0[2]+s)],this.m4=[.5*(r+this.m2[0]),.5*(n+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 iszero(t){return 0==t[0]&&0==t[1]&&0==t[2]}function unit(t){let e=1/(Math.sqrt(t[0]*t[0]+t[1]*t[1]+t[2]*t[2])||1);return[t[0]*e,t[1]*e,t[2]*e]}function abs2(t){return t[0]*t[0]+t[1]*t[1]+t[2]*t[2]}function dot(t,e){return t[0]*e[0]+t[1]*e[1]+t[2]*e[2]}function cross(t,e){return[t[1]*e[2]-t[2]*e[1],t[2]*e[0]-t[0]*e[2],t[0]*e[1]-t[1]*e[0]]}function bezierPP(t,e,i){return[t[0]+i[0]-2*e[0],t[1]+i[1]-2*e[1],t[2]+i[2]-2*e[2]]}function bezierPPP(t,e,i,a){return[a[0]-t[0]+3*(e[0]-i[0]),a[1]-t[1]+3*(e[1]-i[1]),a[2]-t[2]+3*(e[2]-i[2])]}function Straightness(t,e,i,a){let r=[third*(a[0]-t[0]),third*(a[1]-t[1]),third*(a[2]-t[2])];return Math.max(abs2([e[0]-r[0]-t[0],e[1]-r[1]-t[1],e[2]-r[2]-t[2]]),abs2([a[0]-r[0]-i[0],a[1]-r[1]-i[1],a[2]-r[2]-i[2]]))}function Distance2(t,e,i){let a=dot([t[0]-e[0],t[1]-e[1],t[2]-e[2]],i);return a*a}function corners(t,e){return[t,[t[0],t[1],e[2]],[t[0],e[1],t[2]],[t[0],e[1],e[2]],[e[0],t[1],t[2]],[e[0],t[1],e[2]],[e[0],e[1],t[2]],e]}function COBTarget(t,e){mat4.fromTranslation(translMat,[center.x,center.y,center.z]),mat4.invert(cjMatInv,translMat),mat4.multiply(t,e,cjMatInv),mat4.multiply(t,translMat,t)}function setUniforms(t,e){let i=e==pixelShader;gl.useProgram(e),gl.enableVertexAttribArray(positionAttribute),i&&gl.enableVertexAttribArray(widthAttribute);let a=e!=noNormalShader&&!i&&Lights.length>0;if(a&&gl.enableVertexAttribArray(normalAttribute),gl.enableVertexAttribArray(materialAttribute),e.projViewMatUniform=gl.getUniformLocation(e,"projViewMat"),e.viewMatUniform=gl.getUniformLocation(e,"viewMat"),e.normMatUniform=gl.getUniformLocation(e,"normMat"),e!=colorShader&&e!=transparentShader||gl.enableVertexAttribArray(colorAttribute),a)for(let t=0;t<Lights.length;++t)Lights[t].setUniform(e,t);for(let i=0;i<t.materials.length;++i)t.materials[i].setUniform(e,i);gl.uniformMatrix4fv(e.projViewMatUniform,!1,projViewMat),gl.uniformMatrix4fv(e.viewMatUniform,!1,viewMat),gl.uniformMatrix3fv(e.normMatUniform,!1,normMat)}function handleMouseDown(t){mouseDownOrTouchActive=!0,lastMouseX=t.clientX,lastMouseY=t.clientY}let pinchStart,touchStartTime,pinch=!1;function pinchDistance(t){return Math.hypot(t[0].pageX-t[1].pageX,t[0].pageY-t[1].pageY)}function handleTouchStart(t){t.preventDefault();let e=t.targetTouches;swipe=rotate=pinch=!1,zooming||(1!=e.length||mouseDownOrTouchActive||(touchStartTime=(new Date).getTime(),touchId=e[0].identifier,lastMouseX=e[0].pageX,lastMouseY=e[0].pageY),2!=e.length||mouseDownOrTouchActive||(touchId=e[0].identifier,pinchStart=pinchDistance(e),pinch=!0))}function handleMouseUpOrTouchEnd(t){mouseDownOrTouchActive=!1}function rotateScene(t,e,i,a,r){if(t==i&&e==a)return;let[n,s]=arcball([t,-e],[i,-a]);mat4.fromRotation(rotMats,2*r*ArcballFactor*n/lastzoom,s),mat4.multiply(rotMat,rotMats,rotMat)}function shiftScene(t,e,i,a){let r=1/lastzoom;shift.x+=(i-t)*r*halfCanvasWidth,shift.y-=(a-e)*r*halfCanvasHeight}function panScene(t,e,i,a){orthographic?shiftScene(t,e,i,a):(center.x+=(i-t)*(viewParam.xmax-viewParam.xmin),center.y-=(a-e)*(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 t=Math.sqrt(Number.MAX_VALUE),e=1/t;Zoom<=e&&(Zoom=e),Zoom>=t&&(Zoom=t),Zoom!=lastzoom&&(remesh=!0),lastzoom=Zoom}function zoomImage(t){let e=zoomStep*halfCanvasHeight*t;const i=Math.log(.1*Number.MAX_VALUE)/Math.log(zoomFactor);Math.abs(e)<i&&(Zoom*=zoomFactor**e,capzoom())}function normMouse(t){let e=t[0],i=t[1],a=Math.hypot(e,i);return a>1&&(denom=1/a,e*=denom,i*=denom),[e,i,Math.sqrt(Math.max(1-i*i-e*e,0))]}function arcball(t,e){let i=normMouse(t),a=normMouse(e),r=dot(i,a);return r>1?r=1:r<-1&&(r=-1),[Math.acos(r),unit(cross(i,a))]}function zoomScene(t,e,i,a){zoomImage(e-a)}const DRAGMODE_ROTATE=1,DRAGMODE_SHIFT=2,DRAGMODE_ZOOM=3,DRAGMODE_PAN=4;function processDrag(t,e,i,a=1){let r;switch(i){case DRAGMODE_ROTATE:r=rotateScene;break;case DRAGMODE_SHIFT:r=shiftScene;break;case DRAGMODE_ZOOM:r=zoomScene;break;case DRAGMODE_PAN:r=panScene;break;default:r=((t,e,i,a)=>{})}r((lastMouseX-halfCanvasWidth)/halfCanvasWidth,(lastMouseY-halfCanvasHeight)/halfCanvasHeight,(t-halfCanvasWidth)/halfCanvasWidth,(e-halfCanvasHeight)/halfCanvasHeight,a),lastMouseX=t,lastMouseY=e,setProjection(),redraw=!0}function handleKey(t){let e=[];switch(t.key){case"x":e=[1,0,0];break;case"y":e=[0,1,0];break;case"z":e=[0,0,1];break;case"h":home();break;case"+":case"=":case">":expand();break;case"-":case"_":case"<":shrink()}e.length>0&&(mat4.rotate(rotMat,rotMat,.1,e),updateViewMatrix(),redraw=!0)}function handleMouseWheel(t){t.preventDefault(),t.deltaY<0?Zoom*=zoomFactor:Zoom/=zoomFactor,capzoom(),setProjection(),redraw=!0}function handleMouseMove(t){if(!mouseDownOrTouchActive)return;let e;processDrag(t.clientX,t.clientY,e=t.getModifierState("Control")?DRAGMODE_SHIFT:t.getModifierState("Shift")?DRAGMODE_ZOOM:t.getModifierState("Alt")?DRAGMODE_PAN:DRAGMODE_ROTATE)}let zooming=!1,swipe=!1,rotate=!1;function handleTouchMove(t){if(t.preventDefault(),zooming)return;let e=t.targetTouches;if(!pinch&&1==e.length&&touchId==e[0].identifier){let t=e[0].pageX,i=e[0].pageY,a=t-lastMouseX,r=i-lastMouseY,n=a*a+r*r<=shiftHoldDistance*shiftHoldDistance;if(n&&!swipe&&!rotate&&(new Date).getTime()-touchStartTime>shiftWaitTime&&(navigator.vibrate&&window.navigator.vibrate(vibrateTime),swipe=!0),swipe)processDrag(t,i,DRAGMODE_SHIFT);else if(!n){rotate=!0,processDrag(e[0].pageX,e[0].pageY,DRAGMODE_ROTATE,.5)}}if(pinch&&!swipe&&2==e.length&&touchId==e[0].identifier){let t=pinchDistance(e),i=t-pinchStart;zooming=!0,(i*=zoomPinchFactor)>zoomPinchCap&&(i=zoomPinchCap),i<-zoomPinchCap&&(i=-zoomPinchCap),zoomImage(i/size2),pinchStart=t,swipe=rotate=zooming=!1,setProjection(),redraw=!0}}let pixelShader,noNormalShader,materialShader,colorShader,transparentShader,zbuffer=[];function transformVertices(t){let e=viewMat[2],i=viewMat[6],a=viewMat[10];zbuffer.length=t.length;for(let r=0;r<t.length;++r){let n=6*r;zbuffer[r]=e*t[n]+i*t[n+1]+a*t[n+2]}}function drawMaterial0(){drawBuffer(material0Data,pixelShader),material0Data.clear()}function drawMaterial1(){drawBuffer(material1Data,noNormalShader),material1Data.clear()}function drawMaterial(){drawBuffer(materialData,materialShader),materialData.clear()}function drawColor(){drawBuffer(colorData,colorShader),colorData.clear()}function drawTriangle(){drawBuffer(triangleData,transparentShader),triangleData.clear()}function drawTransparent(){let t=transparentData.indices;if(t.length>0){transformVertices(transparentData.vertices);let e=t.length/3,i=Array(e).fill().map((t,e)=>e);i.sort(function(e,i){let a=3*e;Ia=t[a],Ib=t[a+1],Ic=t[a+2];let r=3*i;return IA=t[r],IB=t[r+1],IC=t[r+2],zbuffer[Ia]+zbuffer[Ib]+zbuffer[Ic]<zbuffer[IA]+zbuffer[IB]+zbuffer[IC]?-1:1});let a=Array(t.length);for(let r=0;r<e;++r){let e=3*i[r];a[3*r]=t[e],a[3*r+1]=t[e+1],a[3*r+2]=t[e+2]}gl.depthMask(!1),drawBuffer(transparentData,transparentShader,a),gl.depthMask(!0)}transparentData.clear()}function drawBuffers(){drawMaterial0(),drawMaterial1(),drawMaterial(),drawColor(),drawTriangle(),drawTransparent()}function draw(){embedded&&(offscreen.width=canvas.width,offscreen.height=canvas.height,setViewport()),gl.clearColor(Background[0],Background[1],Background[2],Background[3]),gl.clear(gl.COLOR_BUFFER_BIT|gl.DEPTH_BUFFER_BIT);for(let t=0;t<P.length;++t)P[t].render();drawBuffers(),embedded&&(context.clearRect(0,0,canvas.width,canvas.height),context.drawImage(offscreen,0,0)),remesh=!1}function tick(){requestAnimationFrame(tick),redraw&&(draw(),redraw=!1)}function setDimensions(t,e,i,a){let r=t/e,n=1/lastzoom,s=(i/t+viewportshift[0])*lastzoom,o=(a/e+viewportshift[1])*lastzoom;if(orthographic){let t=B[0]-b[0],e=B[1]-b[1];if(t<e*r){let t=.5*e*r*n,i=2*t*s,a=e*n*o;viewParam.xmin=-t-i,viewParam.xmax=t-i,viewParam.ymin=b[1]*n-a,viewParam.ymax=B[1]*n-a}else{let e=.5*t/(r*Zoom),i=t*n*s,a=2*e*o;viewParam.xmin=b[0]*n-i,viewParam.xmax=B[0]*n-i,viewParam.ymin=-e-a,viewParam.ymax=e-a}}else{let t=H*n,e=t*r,i=2*e*s,a=2*t*o;viewParam.xmin=-e-i,viewParam.xmax=e-i,viewParam.ymin=-t-a,viewParam.ymax=t-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*angle)*B[2],center.x=center.y=0,center.z=.5*(b[2]+B[2]),lastzoom=Zoom=Zoom0,viewParam.zmin=b[2],viewParam.zmax=B[2],shift.x=shift.y=0}function setViewport(){gl.viewportWidth=canvasWidth,gl.viewportHeight=canvasHeight,gl.viewport(0,0,gl.viewportWidth,gl.viewportHeight),gl.scissor(0,0,gl.viewportWidth,gl.viewportHeight)}function setCanvas(){canvas.width=canvasWidth,canvas.height=canvasHeight,embedded&&(offscreen.width=canvasWidth,offscreen.height=canvasHeight),size2=Math.hypot(canvasWidth,canvasHeight),halfCanvasWidth=.5*canvasWidth,halfCanvasHeight=.5*canvasHeight}function setsize(t,e){t>maxViewportWidth&&(t=maxViewportWidth),e>maxViewportHeight&&(e=maxViewportHeight),shift.x*=t/canvasWidth,shift.y*=e/canvasHeight,canvasWidth=t,canvasHeight=e,setCanvas(),setViewport(),home()}function expand(){setsize(canvasWidth*resizeStep+.5,canvasHeight*resizeStep+.5)}function shrink(){setsize(Math.max(canvasWidth/resizeStep+.5,1),Math.max(canvasHeight/resizeStep+.5,1))}function webGLStart(){if(canvas=document.getElementById("Asymptote"),embedded=window.parent.document!=document,initGL(),absolute&&!embedded)canvasWidth*=window.devicePixelRatio,canvasHeight*=window.devicePixelRatio;else{0==canvas.width&&(canvas.width=Math.max(window.innerWidth-windowTrim,windowTrim)),0==canvas.height&&(canvas.height=Math.max(window.innerHeight-windowTrim,windowTrim));let t=canvasWidth/canvasHeight;canvas.width>canvas.height*t?canvas.width=Math.min(canvas.height*t,canvas.width):canvas.height=Math.min(canvas.width/t,canvas.height),canvas.width>0&&(canvasWidth=canvas.width),canvas.height>0&&(canvasHeight=canvas.height)}setCanvas(),ArcballFactor=1+8*Math.hypot(viewportmargin[0],viewportmargin[1])/size2,viewportshift[0]/=Zoom0,viewportshift[1]/=Zoom0,gl.enable(gl.BLEND),gl.blendFunc(gl.SRC_ALPHA,gl.ONE_MINUS_SRC_ALPHA),gl.enable(gl.DEPTH_TEST),gl.enable(gl.SCISSOR_TEST),setViewport(),home(),canvas.onmousedown=handleMouseDown,document.onmouseup=handleMouseUpOrTouchEnd,document.onmousemove=handleMouseMove,canvas.onkeydown=handleKey,canvas.addEventListener("wheel",handleMouseWheel,!1),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),tick()}