add vcglib

vcglib/apps/sample/trimesh_clustering/trimesh_clustering.cpp

@@ -0,0 +1,101 @@
+/****************************************************************************
+* 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.                                                         *
+*                                                                           *
+****************************************************************************/
+/*! \file trimesh_clustering.cpp
+\ingroup code_sample
+
+\brief a minimal example of a clustering based simplification
+
+*/
+#include<vcg/complex/complex.h>
+
+#include <vcg/complex/algorithms/clustering.h>
+
+#include <wrap/io_trimesh/import.h>
+#include <wrap/io_trimesh/export.h>
+
+class MyFace;
+class MyVertex;
+
+struct MyUsedTypes : public vcg::UsedTypes<	vcg::Use<MyVertex>::AsVertexType,    vcg::Use<MyFace>::AsFaceType>{};
+
+class MyVertex  : public vcg::Vertex< MyUsedTypes, vcg::vertex::Coord3f, vcg::vertex::Normal3f, vcg::vertex::BitFlags  >{};
+class MyFace    : public vcg::Face < MyUsedTypes, vcg::face::VertexRef, vcg::face::Normal3f, vcg::face::BitFlags > {};
+class MyMesh    : public vcg::tri::TriMesh< std::vector<MyVertex>, std::vector<MyFace> > {};
+
+int  main(int argc, char **argv)
+{
+  if(argc<3)
+  {
+    printf(
+          "Usage: trimesh_clustering filein.ply fileout.ply [opt] \n"
+          "options: \n"
+          "-k cellnum     approx number of cluster that should be defined; (default 10e5)\n"
+          "-s size        in absolute units the size of the clustering cell (override the previous param)\n"
+          "-d             enable the duplication of faces for double surfaces\n"
+          );
+    exit(0);
+  }
+
+  int CellNum=100000;
+  float CellSize=0;
+  bool DupFace=false;
+
+  int i=3;
+  while(i<argc)
+  {
+    if(argv[i][0]!='-')
+    { printf("Error unable to parse option '%s'\n",argv[i]); exit(0); }
+    switch(argv[i][1])
+    {
+    case 'k' :	CellNum=atoi(argv[i+1]); ++i; printf("Using %i clustering cells\n",CellNum); break;
+    case 's' :	CellSize=atof(argv[i+1]); ++i; printf("Using %5f as clustering cell size\n",CellSize); break;
+    case 'd' :	DupFace=true; printf("Enabling the duplication of faces for double surfaces\n"); break;
+
+    default : {printf("Error unable to parse option '%s'\n",argv[i]); exit(0);}
+    }
+    ++i;
+  }
+
+  MyMesh m;
+  if(vcg::tri::io::ImporterPLY<MyMesh>::Open(m,argv[1])!=0)
+  {
+    printf("Error reading file  %s\n",argv[1]);
+    exit(0);
+  }
+
+  vcg::tri::UpdateBounding<MyMesh>::Box(m);
+  vcg::tri::UpdateNormal<MyMesh>::PerFace(m);
+  printf("Input mesh  vn:%i fn:%i\n",m.VN(),m.FN());
+  vcg::tri::Clustering<MyMesh, vcg::tri::AverageColorCell<MyMesh> > Grid(m.bbox,CellNum,CellSize, DupFace);
+  
+  printf("Clustering to %i cells\n",Grid.gridSize()[0]*Grid.gridSize()[1]*Grid.gridSize()[2] );
+  printf("Grid of %i x %i x %i cells\n",Grid.gridSize()[0],Grid.gridSize()[1],Grid.gridSize()[2]);
+  printf("with cells size of %.2f x %.2f x %.2f units\n",Grid.gridVoxel()[0],Grid.gridVoxel()[1],Grid.gridVoxel()[2]);
+  
+  Grid.AddMesh(m);
+  Grid.ExtractMesh(m);
+  printf("Output mesh vn:%i fn:%i\n",m.VN(),m.FN());
+
+  vcg::tri::io::ExporterPLY<MyMesh>::Save(m,argv[2]);
+  return 0;
+}