add vcglib

vcglib/wrap/io_trimesh/io_material.h

@@ -0,0 +1,144 @@
+/****************************************************************************
+* VCGLib                                                            o o     *
+* Visual and Computer Graphics Library                            o     o   *
+*                                                                _   O  _   *
+* Copyright(C) 2004-2016                                           \/)\/    *
+* Visual Computing Lab                                            /\/|      *
+* ISTI - Italian National Research Council                           |      *
+*                                                                    \      *
+* All rights reserved.                                                      *
+*                                                                           *
+* This program is free software; you can redistribute it and/or modify      *   
+* it under the terms of the GNU General Public License as published by      *
+* the Free Software Foundation; either version 2 of the License, or         *
+* (at your option) any later version.                                       *
+*                                                                           *
+* This program is distributed in the hope that it will be useful,           *
+* but WITHOUT ANY WARRANTY; without even the implied warranty of            *
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             *
+* GNU General Public License (http://www.gnu.org/licenses/gpl.txt)          *
+* for more details.                                                         *
+*                                                                           *
+****************************************************************************/
+
+/****************************************************************************
+  History
+  
+ $Log: not supported by cvs2svn $
+ Revision 1.5  2008/02/27 00:34:43  cignoni
+ corrected various bugs in the export of texture coords
+ 
+ Revision 1.4  2007/06/20 10:28:04  tarini
+ "newline at end of file" and  "endif" warnings fixed
+ 
+ Revision 1.3  2006/11/09 07:51:44  cignoni
+ bug due to wrong access to eventually unexistent FaceColor
+ 
+ Revision 1.2  2006/10/09 19:58:08  cignoni
+ Added casts to remove warnings
+ 
+ Revision 1.1  2006/03/07 13:19:29  cignoni
+ First Release with OBJ import support
+ 
+ Revision 1.1  2006/02/16 19:28:36  fmazzant
+ transfer of Export_3ds.h, Export_obj.h, Io_3ds_obj_material.h from Meshlab to vcg
+ 
+ Revision 1.1  2006/02/06 11:04:40  fmazzant
+ added file material.h. it include struct Material, CreateNewMaterial(...) and MaterialsCompare(...)
+ 
+ 
+ ****************************************************************************/
+
+#ifndef __VCGLIB_MATERIAL
+#define __VCGLIB_MATERIAL
+
+#include <string>
+#include <vector>
+#include <vcg/space/point3.h>
+
+namespace vcg {
+namespace tri {
+namespace io {
+
+/*
+    structures material
+  */
+struct Material
+{
+  unsigned int index=-1;//index of material
+  std::string materialName;
+  
+  Point3f Ka=Point3f(0.2f, 0.2f, 0.2f);//ambient
+  Point3f Kd=Point3f(1.0f, 1.0f, 1.0f);//diffuse
+  Point3f Ks=Point3f(1.0f, 1.0f, 1.0f);//specular
+  
+  //float d;//alpha - not used
+  float Tr=0.0f;//alpha (for Tr, 0 means fully opaque)
+  
+  int illum=2;//specular illumination
+  float Ns=0.f;
+  
+  std::string map_Kd; //filename texture
+};
+
+
+template <class SaveMeshType>
+class Materials
+{
+public:
+  typedef typename SaveMeshType::FaceType FaceType;
+  typedef typename SaveMeshType::FaceIterator FaceIterator;
+  typedef typename SaveMeshType::VertexIterator VertexIterator;
+  typedef typename SaveMeshType::VertexType VertexType;
+  
+  /*
+      creates a new meterial
+    */
+  inline static int CreateNewMaterial(const SaveMeshType &m, std::vector<Material> &materials, const FaceType& f)
+  {
+    Material mtl;
+
+    if(HasPerFaceColor(m)){
+      mtl.Kd = Point3f((float)(f.C()[0])/255.0f,(float)(f.C()[1])/255.0f,(float)(f.C()[2])/255.0f);//diffuse
+      mtl.Tr = (float)(255-f.C()[3])/255.0f;//alpha
+    }
+
+    if(m.textures.size() && HasPerWedgeTexCoord(m) && f.WT(0).n() >=0 )
+      mtl.map_Kd = m.textures[f.WT(0).n()];
+    else
+      mtl.map_Kd = "";
+
+    int matInd = MaterialsCompare(materials,mtl);
+    if(matInd == -1)
+    {
+      mtl.index = int(materials.size());
+      materials.push_back(mtl);
+      return mtl.index;
+    }
+    return matInd;
+  }
+  
+  /*
+      returns the index of the material if it exists inside the list of the materials, 
+      otherwise it returns -1.
+    */
+  inline static int MaterialsCompare(std::vector<Material> &materials, Material mtl)
+  {
+    for(unsigned int i=0;i<materials.size();i++)
+    {
+      if(materials[i].Kd     != mtl.Kd    ) continue;
+      if(materials[i].Ka     != mtl.Ka    ) continue;
+      if(materials[i].Ks     != mtl.Ks    ) continue;
+      if(materials[i].Tr     != mtl.Tr    ) continue;
+      if(materials[i].illum  != mtl.illum ) continue;
+      if(materials[i].Ns     != mtl.Ns    ) continue;
+      if(materials[i].map_Kd != mtl.map_Kd) continue;
+      return i;
+    }
+    return -1;
+  }
+};
+}
+}
+}
+#endif //__VCGLIB_MATERIAL