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 ( OpenVolumeMesh::VertexIter v_it = _mesh.vertices_begin() ; v_it != _mesh.vertices_end(); ++v_it) {

      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 ( OpenVolumeMesh::VertexIter v_it = _mesh.vertices_begin(); v_it != _mesh.vertices_end(); ++v_it) {
    // 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