HAnimDisplacer.h

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//    Copyright 2004-2019, SenseGraphics AB
//
//    This file is part of H3D API.
//
//    H3D API 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.
//
//    H3D API 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 for more details.
//
//    You should have received a copy of the GNU General Public License
//    along with H3D API; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
//    A commercial license is also available. Please contact us at 
//    www.sensegraphics.com for more information.
//
//
//
#ifndef __HANIMDISPLACER_H__
#define __HANIMDISPLACER_H__
 
#include <H3D/X3DGeometricPropertyNode.h>
#include <H3D/MFVec3f.h>
#include <H3D/MFInt32.h>
#include <H3D/SFString.h>
#include <H3D/SFFloat.h>
 
 
namespace H3D {
 
  class H3DAPI_API HAnimDisplacer : public X3DGeometricPropertyNode {
  public:
    HAnimDisplacer( Inst< SFNode  >  _metadata = 0,
                    Inst< MFInt32 > _coordIndex = 0,
                    Inst< MFVec3f > _displacements = 0,
                    Inst< SFString > _name = 0,
                    Inst< SFFloat > _weight = 0 );
 
    template< class VectorType >
    inline void displaceCoordinates( VectorType &points,
                                     const Matrix4f &displace_transform  );
 
    H3DUniquePtr< MFInt32 > coordIndex;
 
    H3DUniquePtr< MFVec3f > displacements;
 
    H3DUniquePtr< SFString    >  name;
 
    H3DUniquePtr< SFFloat > weight;
 
    static H3DNodeDatabase database;
  };
 
  template< class VectorClass >
  void HAnimDisplacer::displaceCoordinates( VectorClass &points,
                                            const Matrix4f &displace_transform) {
    const vector< Vec3f > &displace = displacements->getValue();
    const vector< int > &indices = coordIndex->getValue();
    H3DFloat w = weight->getValue();
 
    // if weight is 0 this displacer adds nothing.
    if( w == 0 ) return;
 
    size_t p_size = points.size();
    size_t d_size = displace.size();
 
    for( size_t i = 0; i < indices.size(); ++i ) {
      int index = indices[i];
      if( (unsigned int) index < p_size && i < d_size) {
        Vec4f point_displacement = displace_transform * Vec4f( displace[i].x, displace[i].y, displace[i].z, 0 ) ;
        points[index] = w * (Vec3f(point_displacement.x,
                                   point_displacement.y,
                                   point_displacement.z ) ) + points[index];
      }
    }
  }
 
}
 
#endif