//---------------------------------------------------------------------------X_IO *X_ReadMeshWavefront(const char *filename){//---------------------------------------------------------------------------   int iXyz, iUv, iNrm, iTri;   int iLine,nLines;   X_IO *io = new X_IO;      printf("Reading Wavefront from file: %s ...",filename);   ifstream file(filename);      //Zaehlen der Vertexe und Dreiecke      iXyz = iUv = iNrm = iTri = 0;   iLine = nLines = 0;   if (!file.fail()){      string line, tmp;            io->t.nXyz = 0;      io->t.nUv  = 0;      io->t.nNrm = 0;      io->t.nTri = 0;            while (!file.eof()){         getline(file,line);         tmp = line.substr(0,3);                  if (!strcmp(line.substr(0,2).c_str(),"o "))  {;}         if (!strcmp(line.substr(0,2).c_str(),"v "))  {io->t.nXyz++; if (!iXyz) iXyz = iLine; }         if (!strcmp(line.substr(0,3).c_str(),"vt ")) {io->t.nUv++;  if (!iUv)  iUv  = iLine; }         if (!strcmp(line.substr(0,3).c_str(),"vn ")) {io->t.nNrm++; if (!iNrm) iNrm = iLine; }         if (!strcmp(line.substr(0,2).c_str(),"g "))  {;}         if (!strcmp(line.substr(0,2).c_str(),"f "))  {io->t.nTri++; if (!iTri) iTri = iLine; }         iLine++;      }            nLines = iLine;         io->t.bXyz        = true;      io->t.bUv         = true;      io->t.bSmoothNorm = true;      io->t.bTri        = true;      io->t.bSmoothTri  = true;      io->t.bNorm       = true;      io->t.bMid        = false;      io->t.bIndexXyz   = false;      io->t.bIndexTri   = false;      io->t.bScale      = true;   //Keine Skalierung         io->t.xyz        = new float*[io->t.nXyz];      io->t.uv         = new float*[io->t.nUv];      io->t.norm       = new float*[io->t.nTri];      io->t.smoothNorm = new float*[io->t.nNrm];      io->t.tri        = new int  *[io->t.nTri];      io->t.smoothTri = new int **[io->t.nTri];      io->t.mid        = new float*[io->t.nTri];         for (int i=0;i<io->t.nXyz;i++) io->t.xyz        = new float[3];      for (int i=0;i<io->t.nUv;i++)  io->t.uv         = new float[3];      for (int i=0;i<io->t.nTri;i++) io->t.norm       = new float[3];      for (int i=0;i<io->t.nNrm;i++) io->t.smoothNorm = new float[3];      for (int i=0;i<io->t.nTri;i++) io->t.tri        = new int[3];      for (int i=0;i<io->t.nTri;i++) io->t.smoothTri  = new int*[3];      for (int i=0;i<io->t.nTri;i++) io->t.mid        = new float[3];            for (int i=0;i<io->t.nTri;i++)         for (int j=0;j<3;j++)            io->t.smoothTri[j] = new int[3];   }   file.close();         FILE *fid;      fid = fopen(filename,"r");   iLine = 0;   if (fid){      while (iLine < nLines){         if (iLine >= nLines) break;         char temp_string[256];         if (iLine == iXyz){            for (int i=0;i<io->t.nXyz;i++){               fscanf(fid,"v %f %f %f\n",&io->t.xyz[0],&io->t.xyz[1],&io->t.xyz[2]);               iLine++;            }         }         if (iLine == iUv){            for (int i=0;i<io->t.nUv;i++){               fscanf(fid,"vt %f %f\n",&io->t.uv[0],&io->t.uv[1]);               iLine++;            }         }         if (iLine == iNrm){            for (int i=0;i<io->t.nNrm;i++){               fscanf(fid,"vn %f %f %f\n",&io->t.smoothNorm[0],&io->t.smoothNorm[1],&io->t.smoothNorm[2]);               iLine++;            }         }         if (iLine == iTri){            for (int i=0;i<io->t.nTri;i++){               fscanf(fid,"f %d/%d/%d %d/%d/%d %d/%d/%d\n",&io->t.smoothTri[0][0],&io->t.smoothTri[0][1],&io->t.smoothTri[0][2],                                                           &io->t.smoothTri[1][0],&io->t.smoothTri[1][1],&io->t.smoothTri[1][2],                                                           &io->t.smoothTri[2][0],&io->t.smoothTri[2][1],&io->t.smoothTri[2][2]);               iLine++;            }           }         iLine++;           fgets(temp_string,256,fid);      }            for (int i=0;i<io->t.nTri;i++)         for (int j=0;j<3;j++)            for (int k=0;k<3;k++)               io->t.smoothTri[j][k]--;      CheckMesh(io);            fclose(fid);            printf(" done.\n");      return io;   }   printf(" error.\n");      return NULL;}

//------------------------------------------------------------------------void X_PrepareSmoothMeshList(X_IO *mesh, unsigned int listID){//------------------------------------------------------------------------   float norm1[3],norm2[3],norm3[3];   float xyz1[3],xyz2[3],xyz3[3];   float uv1[2],uv2[2],uv3[2];   int   tri1[3], tri2[3], tri3[3];   glNewList(listID,GL_COMPILE);      glPushMatrix();         for (int i=0;i<mesh->t.nTri;i++){            tri1[0] = mesh->t.smoothTri[0][0];            tri1[1] = mesh->t.smoothTri[1][0];            tri1[2] = mesh->t.smoothTri[2][0];            tri2[0] = mesh->t.smoothTri[0][1];            tri2[1] = mesh->t.smoothTri[1][1];            tri2[2] = mesh->t.smoothTri[2][1];            tri3[0] = mesh->t.smoothTri[0][2];            tri3[1] = mesh->t.smoothTri[1][2];            tri3[2] = mesh->t.smoothTri[2][2];            norm1[0] = mesh->t.smoothNorm[tri3[0]][0];            norm1[1] = mesh->t.smoothNorm[tri3[0]][1];            norm1[2] = mesh->t.smoothNorm[tri3[0]][2];            norm2[0] = mesh->t.smoothNorm[tri3[1]][0];            norm2[1] = mesh->t.smoothNorm[tri3[1]][1];            norm2[2] = mesh->t.smoothNorm[tri3[1]][2];            norm3[0] = mesh->t.smoothNorm[tri3[2]][0];            norm3[1] = mesh->t.smoothNorm[tri3[2]][1];            norm3[2] = mesh->t.smoothNorm[tri3[2]][2];            xyz1[0] = mesh->t.xyz[tri1[0]][0];            xyz1[1] = mesh->t.xyz[tri1[0]][1];            xyz1[2] = mesh->t.xyz[tri1[0]][2];            xyz2[0] = mesh->t.xyz[tri1[1]][0];            xyz2[1] = mesh->t.xyz[tri1[1]][1];            xyz2[2] = mesh->t.xyz[tri1[1]][2];            xyz3[0] = mesh->t.xyz[tri1[2]][0];            xyz3[1] = mesh->t.xyz[tri1[2]][1];            xyz3[2] = mesh->t.xyz[tri1[2]][2];            uv1[0]  = mesh->t.uv[tri2[0]][0];            uv1[1]  = mesh->t.uv[tri2[0]][1];            uv2[0]  = mesh->t.uv[tri2[1]][0];            uv2[1]  = mesh->t.uv[tri2[1]][1];            uv3[0]  = mesh->t.uv[tri2[2]][0];            uv3[1]  = mesh->t.uv[tri2[2]][1];            glBegin(GL_TRIANGLES);               glNormal3fv(norm1); glTexCoord2fv(uv1); glVertex3fv(xyz1);               glNormal3fv(norm2); glTexCoord2fv(uv2); glVertex3fv(xyz2);               glNormal3fv(norm3); glTexCoord2fv(uv3); glVertex3fv(xyz3);            glEnd();         }      glPopMatrix();   glEndList();   }

typedef struct{   float **mat;   int row, col;} MATRIX;typedef struct{   bool    bTri,bXyz,bNorm,bMid,bUv,bIndexTri,bIndexXyz; //Schalter fuer MakeMesh   bool    bSmoothNorm,bScale,bSmoothTri;                //Schalter fuer MakeMesh   int     nTri,nXyz,nUv,nNrm;                           //Anzahl der Dreiecke, Koordinaten, Texturkoordinaten, Normalenvektoren   float   scale;                                        //Skalierung   int   **tri;                                          //Triangulierung   int   ***smoothTri;                                   //Erweiterte Triangulierung mit Normalenvektor und Texturkoordinaten   float **xyz;                                          //Kooridnaten   float **norm;                                         //Normalenvektor   float **smoothNorm;                                   //Normalenvektor auf Vertex   float **mid;                                          //Mittelpunktskoordinaten   float **uv;                                           //Texturkoordinaten   int   *indexTri;                                      //Index der Triangulierung   int   *indexXyz;                                      //Index der Vertexe} TRIANGLES;typedef struct{   GLubyte *imageData;                                   // Image Data (Up To 32 Bits)   GLuint  bpp;                                          // Image Color Depth In Bits Per Pixel.   GLuint  width;                                        // Image Width   GLuint  height;                                       // Image Height   GLuint  texID;    GLuint  base;                                         // Texture ID Used To Select A Texture} TEXTURE;typedef struct{   MATRIX    m;   TRIANGLES t;   TEXTURE   tex;} X_IO;