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/****************************************************************************
* VCGLib o o *
* Visual and Computer Graphics Library o o *
* _ O _ *
* Copyright(C) 2004 \/)\/ *
* Visual Computing Lab /\/| *
* ISTI - Italian National Research Council | *
* \ *
* All rights reserved. *
* *
* This program 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. *
* *
* This program 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 (http://www.gnu.org/licenses/gpl.txt) *
* for more details. *
* *
****************************************************************************/
#ifndef __VCG_TRI_UPDATE_TEXTURE
#define __VCG_TRI_UPDATE_TEXTURE
//#include <vcg/space/plane.h>
namespace vcg {
namespace tri {
/// \ingroup trimesh
/// \headerfile texture.h vcg/complex/algorithms/update/texture.h
/// \brief This class is used to update/generate texcoord position according to various critera. .
template <class ComputeMeshType>
class UpdateTexture
{
public:
typedef ComputeMeshType MeshType;
typedef typename MeshType::ScalarType ScalarType;
typedef typename MeshType::VertexType VertexType;
typedef typename MeshType::VertexPointer VertexPointer;
typedef typename MeshType::VertexIterator VertexIterator;
typedef typename MeshType::FaceType FaceType;
typedef typename MeshType::FacePointer FacePointer;
typedef typename MeshType::FaceIterator FaceIterator;
static void WedgeTexFromPlane(ComputeMeshType &m, const Point3<ScalarType> &uVec, const Point3<ScalarType> &vVec, bool aspectRatio)
{
// First just project
FaceIterator fi;
for(fi=m.face.begin();fi!=m.face.end();++fi)
if(!(*fi).IsD())
{
for(int i=0;i<3;++i)
{
(*fi).WT(i).U()= (*fi).V(i)->cP() * uVec;
(*fi).WT(i).V()= (*fi).V(i)->cP() * vVec;
}
}
// second Loop normalize to
Box2f bb;
for(fi=m.face.begin();fi!=m.face.end();++fi)
if(!(*fi).IsD())
{
for(int i=0;i<3;++i)
{
bb.Add((*fi).WT(i).P());
}
}
ScalarType wideU = bb.max[0]- bb.min[0];
ScalarType wideV = bb.max[1]- bb.min[1];
if(aspectRatio) {
wideU = std::max(wideU,wideV);
wideV = wideU;
}
for(fi=m.face.begin();fi!=m.face.end();++fi)
if(!(*fi).IsD())
{
for(int i=0;i<3;++i)
{
(*fi).WT(i).U() = ((*fi).WT(i).U() - bb.min[0]) / wideU;
(*fi).WT(i).V() = ((*fi).WT(i).V() - bb.min[1]) / wideV;
}
}
}
static void WedgeTexFromCamera(ComputeMeshType &m, Plane3<ScalarType> &pl)
{
}
static void WedgeTexFromVertexTex(ComputeMeshType &m)
{
for(FaceIterator fi=m.face.begin();fi!=m.face.end();++fi)
if(!(*fi).IsD())
{
for(int i=0;i<3;++i)
{
(*fi).WT(i).U() = (*fi).V(i)->T().U();
(*fi).WT(i).V() = (*fi).V(i)->T().V();
}
}
}
/// Currently texture coords are kept for ALL the triangles of a mesh. The texture id is stored with each face.
/// if a given face should not have tex coord it has the default -1 value for texture ID.
/// This function will add an new fake texture, add that to the list of textures and change all the -1 id to that value.
static void WedgeTexRemoveNull(ComputeMeshType &m, const std::string &texturename)
{
bool found=false;
FaceIterator fi;
// first loop lets check that there are -1 indexed textured face
for(fi=m.face.begin();fi!=m.face.end();++fi)
if(!(*fi).IsD()) if((*fi).WT(0).N()==-1) found = true;
if(!found) return;
m.textures.push_back(texturename);
int nullId=m.textures.size()-1;
for(fi=m.face.begin();fi!=m.face.end();++fi)
if(!(*fi).IsD()) if((*fi).WT(0).N()==-1)
{
(*fi).WT(0).N() = nullId;
(*fi).WT(1).N() = nullId;
(*fi).WT(2).N() = nullId;
}
}
}; // end class
} // End namespace
} // End namespace
#endif
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