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* Visual and Computer Graphics Library                            o     o   *
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/*! \file trimesh_normal.cpp
\ingroup code_sample

\brief An example of all the methods for computing normals over a mesh.

*/
#include<vcg/complex/complex.h>

#include<wrap/io_trimesh/import_off.h>

using namespace vcg;
using namespace std;

class MyEdge;
class MyFace;
class MyVertex;
struct MyUsedTypes : public UsedTypes<	Use<MyVertex>   ::AsVertexType,
                                        Use<MyEdge>     ::AsEdgeType,
                                        Use<MyFace>     ::AsFaceType>{};

class MyVertex  : public Vertex<MyUsedTypes, vertex::Coord3f, vertex::Normal3f, vertex::BitFlags  >{};
class MyFace    : public Face< MyUsedTypes, face::FFAdj,  face::VertexRef, face::BitFlags > {};
class MyEdge    : public Edge<MyUsedTypes>{};
class MyMesh    : public tri::TriMesh< vector<MyVertex>, vector<MyFace> , vector<MyEdge>  > {};

int main( int argc, char **argv )
{
  if(argc<2)
  {
    printf("Usage trimesh_base <meshfilename.obj>\n");
    return -1;
  }

  MyMesh m;

  if(tri::io::ImporterOFF<MyMesh>::Open(m,argv[1])!=0)
  {
    printf("Error reading file  %s\n",argv[1]);
    exit(0);
  }

  Matrix44f m44 = Matrix44f::Identity();

  tri::UpdateNormal<MyMesh>::PerVertexClear(m);
  tri::UpdateNormal<MyMesh>::PerVertex(m);
  tri::UpdateNormal<MyMesh>::PerVertexAngleWeighted(m);
  tri::UpdateNormal<MyMesh>::PerVertexNelsonMaxWeighted(m);
  tri::UpdateNormal<MyMesh>::PerFace(m);
  tri::UpdateNormal<MyMesh>::PerVertexFromCurrentFaceNormal(m);
  tri::UpdateNormal<MyMesh>::PerFaceFromCurrentVertexNormal(m);
  tri::UpdateNormal<MyMesh>::NormalizePerVertex(m);
  tri::UpdateNormal<MyMesh>::NormalizePerFace(m);
  tri::UpdateNormal<MyMesh>::NormalizePerFaceByArea(m);
  tri::UpdateNormal<MyMesh>::PerBitQuadFaceNormalized(m);
  tri::UpdateNormal<MyMesh>::PerVertexMatrix(m,m44);
  tri::UpdateNormal<MyMesh>::PerFaceMatrix(m,m44);
  tri::UpdateNormal<MyMesh>::PerWedgeCrease(m, math::ToRad(45.0f));

  return 0;
}