1 files changed, 180 insertions, 0 deletions
diff --git a/graphics/asymptote/glrender.h b/graphics/asymptote/glrender.h
new file mode 100644
index 0000000000..5354fa59e7
--- /dev/null
+++ b/graphics/asymptote/glrender.h
@@ -0,0 +1,180 @@
+/*****
+ * glrender.h
+ * Render 3D Bezier paths and surfaces.
+ *****/
+
+#ifndef GLRENDER_H
+#define GLRENDER_H
+
+#include "common.h"
+#include "triple.h"
+
+#ifdef HAVE_GL
+
+#include <csignal>
+
+#define GLEW_NO_GLU
+//#define GLEW_OSMESA
+
+#ifdef __MSDOS__
+#define GLEW_STATIC
+#define _WIN32
+#endif
+
+#include "GL/glew.h"
+
+#ifdef __APPLE__
+#define GL_SILENCE_DEPRECATION
+#include <OpenGL/gl.h>
+#ifdef HAVE_LIBGLUT
+#include <GLUT/glut.h>
+#endif
+#ifdef HAVE_LIBOSMESA
+#include <GL/osmesa.h>
+#endif
+#else
+#ifdef __MSDOS__
+#undef _WIN32
+#include <GL/gl.h>
+#include <GL/wglew.h>
+#include <GL/wglext.h>
+#endif
+#ifdef HAVE_LIBGLUT
+#include <GL/glut.h>
+#endif
+#ifdef HAVE_LIBOSMESA
+#include <GL/osmesa.h>
+#endif
+#endif
+
+namespace camp {
+class picture;
+
+inline void store(GLfloat *f, double *C)
+{
+  f[0]=C[0];
+  f[1]=C[1];
+  f[2]=C[2];
+}
+
+inline void store(GLfloat *control, const camp::triple& v)
+{
+  control[0]=v.getx();
+  control[1]=v.gety();
+  control[2]=v.getz();
+}
+
+inline void store(GLfloat *control, const triple& v, double weight)
+{
+  control[0]=v.getx()*weight;
+  control[1]=v.gety()*weight;
+  control[2]=v.getz()*weight;
+  control[3]=weight;
+}
+
+}
+
+namespace gl {
+
+extern bool outlinemode;
+extern bool wireframeMode;
+extern Int maxvertices;
+extern bool forceRemesh;
+extern GLuint ubo;
+
+struct projection 
+{
+public:
+  bool orthographic;
+  camp::triple camera;
+  camp::triple up;
+  camp::triple target;
+  double zoom;
+  double angle;
+  camp::pair viewportshift;
+  
+  projection(bool orthographic=false, camp::triple camera=0.0,
+             camp::triple up=0.0, camp::triple target=0.0,
+             double zoom=0.0, double angle=0.0,
+             camp::pair viewportshift=0.0) : 
+    orthographic(orthographic), camera(camera), up(up), target(target),
+    zoom(zoom), angle(angle), viewportshift(viewportshift) {}
+};
+
+GLuint initHDR();
+
+projection camera(bool user=true);
+
+void glrender(const string& prefix, const camp::picture* pic,
+              const string& format, double width, double height, double angle,
+              double zoom, const camp::triple& m, const camp::triple& M,
+              const camp::pair& shift, double *t, double *background,
+              size_t nlights, camp::triple *lights, double *diffuse,
+              double *specular, bool view, int oldpid=0);
+
+struct ModelView {
+  double T[16];
+  double Tinv[16];
+};
+
+extern ModelView modelView;
+
+void initshader();
+void deleteshader();
+
+}
+
+namespace camp {
+
+struct billboard 
+{
+  double cx,cy,cz;
+  triple u,v,w;
+  
+  void init(const triple& center) {
+    cx=center.getx();
+    cy=center.gety();
+    cz=center.getz();
+    gl::projection P=gl::camera(false);
+    w=unit(P.camera-P.target);
+    v=unit(perp(P.up,w));
+    u=cross(v,w);
+  }
+    
+  triple transform(const triple& V) {
+    double x=V.getx()-cx;
+    double y=V.gety()-cy;
+    double z=V.getz()-cz;
+    
+    return triple(cx+u.getx()*x+v.getx()*y+w.getx()*z,
+                  cy+u.gety()*x+v.gety()*y+w.gety()*z,
+                  cz+u.getz()*x+v.getz()*y+w.getz()*z);
+  }
+  
+  void store(GLfloat* C, const triple& V) {
+    double x=V.getx()-cx;
+    double y=V.gety()-cy;
+    double z=V.getz()-cz;
+    C[0]=cx+u.getx()*x+v.getx()*y+w.getx()*z;
+    C[1]=cy+u.gety()*x+v.gety()*y+w.gety()*z;
+    C[2]=cz+u.getz()*x+v.getz()*y+w.getz()*z;
+  }
+};
+
+extern billboard BB;
+
+extern GLint materialShader;
+extern GLint colorShader;
+extern GLint noNormalShader;
+extern GLint pixelShader;
+
+void setUniforms(GLint shader);
+void deleteUniforms();
+
+}
+
+#else
+typedef float GLfloat;
+#endif
+
+#endif