Clifford Wolf:

Added CGAL patch with gluTess combine hotfix 



git-svn-id: http://svn.clifford.at/openscad/trunk@136 b57f626f-c46c-0410-a088-ec61d464b74c

CGAL-OGL-Tess-Combine-Fix.patch

@@ -0,0 +1,43 @@
+--- CGAL-3.4/include/CGAL/Nef_3/OGL_helper.h
++++ CGAL-3.4/include/CGAL/Nef_3/OGL_helper.h
+@@ -243,6 +243,23 @@
+     glVertex3dv(pc); 
+   }
+ 
++  inline void CGAL_GLU_TESS_CALLBACK combineCallback(GLdouble coords[3], GLvoid *d[4], GLfloat w[4], GLvoid **dataOut)
++  {
++    static std::list<GLdouble*> pcache;
++    if (dataOut) {
++      GLdouble *n = new GLdouble[3];
++      n[0] = coords[0];
++      n[1] = coords[1];
++      n[2] = coords[2];
++      pcache.push_back(n);
++      *dataOut = n;
++    } else {
++      for (std::list<GLdouble*>::const_iterator i = pcache.begin(); i != pcache.end(); i++)
++        delete[] *i;
++      pcache.clear();
++    }
++  }
++
+ 
+  enum { SNC_AXES};
+  enum { SNC_BOUNDARY, SNC_SKELETON };
+@@ -376,6 +393,8 @@
+       GLUtesselator* tess_ = gluNewTess();
+       gluTessCallback(tess_, GLenum(GLU_TESS_VERTEX_DATA),
+ 		      (GLvoid (CGAL_GLU_TESS_CALLBACK *)(CGAL_GLU_TESS_DOTS)) &vertexCallback);
++      gluTessCallback(tess_, GLenum(GLU_TESS_COMBINE),
++		      (GLvoid (CGAL_GLU_TESS_CALLBACK *)(CGAL_GLU_TESS_DOTS)) &combineCallback);
+       gluTessCallback(tess_, GLenum(GLU_TESS_BEGIN),
+ 		      (GLvoid (CGAL_GLU_TESS_CALLBACK *)(CGAL_GLU_TESS_DOTS)) &beginCallback);
+       gluTessCallback(tess_, GLenum(GLU_TESS_END),
+@@ -410,6 +429,7 @@
+       gluTessEndPolygon(tess_);
+       //      CGAL_NEF_TRACEN("End Polygon");
+       gluDeleteTess(tess_);
++      combineCallback(NULL, NULL, NULL, NULL);
+     }
+ 
+     void construct_axes() const