TextureControl1DTextureHandlingOVMT_impl.hh

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#if defined(ENABLE_HEXAHEDRALMESH_SUPPORT) || defined(ENABLE_POLYHEDRALMESH_SUPPORT) || defined(ENABLE_TETRAHEDRALMESH_SUPPORT)
 
#define TEXTURECONTROL_1D_TEXTURE_HANDLING_OVM_C
 
#include "TextureControl.hh"
#include "TextureMath.hh"
 
template< typename VolumeMeshT, typename VolumeMeshObjectT >
void TextureControlPlugin::copyTexture( Texture& _texture , VolumeMeshT& _mesh, VolumeMeshObjectT& _obj, OpenVolumeMesh::VertexPropertyT< double > _texProp )
{
  // Compute the minimal and maximal values for this texture
  double max = -FLT_MIN;
  double min =  FLT_MAX;;
 
  // Compute minimal and maximal value of the coordinates
  // Keep track of absolute values!
  for (auto v_it : _mesh.vertices()) {
 
      max = std::max( _texProp[v_it] , max);
      min = std::min( _texProp[v_it] , min);
 
  }
 
  OpenVolumeMesh::TexCoordAttrib<ACG::Vec2f>& texcoord = _obj.texcoords();
 
  TextureMath convert(_texture.parameters,min,max);
 
  for (auto v_it : _mesh.vertices()) {
    // Get the value of the property
    double value = _texProp[v_it];
 
    // Mangle it with the predefined user options (including absolute, clamping, ...)
    value = convert.transform(value);
    
    // Write result to the OpenMesh texture coordinates ( 2d accessing the diagonal of a 2d texture)
    texcoord[v_it] = ACG::Vec2f(float(value), float(value) );
  }
}
 
#endif