TextureControl1DTextureHandlingOVMT.cc 4.93 KB
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/*===========================================================================*\
*                                                                            *
*                              OpenFlipper                                   *
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 *           Copyright (c) 2001-2015, RWTH-Aachen University                 *
 *           Department of Computer Graphics and Multimedia                  *
 *                          All rights reserved.                             *
 *                            www.openflipper.org                            *
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 * This file is part of OpenFlipper.                                         *
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 * 2. Redistributions in binary form must reproduce the above copyright      *
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*                                                                            *
\*===========================================================================*/

/*===========================================================================*\
*                                                                            *
*   $Revision$                                                       *
*   $LastChangedBy$                                                *
*   $Date$                     *
*                                                                            *
\*===========================================================================*/

#ifdef ENABLE_OPENVOLUMEMESH_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