66 lines
2.9 KiB
C++
66 lines
2.9 KiB
C++
/****************************************************************************
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* VCGLib o o *
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* Visual and Computer Graphics Library o o *
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* _ O _ *
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* Copyright(C) 2004 \/)\/ *
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* Visual Computing Lab /\/| *
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* ISTI - Italian National Research Council | *
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* \ *
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* All rights reserved. *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License (http://www.gnu.org/licenses/gpl.txt) *
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* for more details. *
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* *
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****************************************************************************/
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#ifndef VCG_UV_UTILS
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#define VCG_UV_UTILS
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namespace vcg {
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namespace tri{
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///calculate the BBox in UV space
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template <class MeshType>
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vcg::Box2<typename MeshType::ScalarType> PerWedgeUVBox(MeshType &m)
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{
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vcg::Box2<typename MeshType::ScalarType> UVBox;
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typename MeshType::FaceIterator fi;
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for (fi=m.face.begin();fi!=m.face.end();fi++)
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{
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if ((*fi).IsD()) continue;
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for (int i=0;i<3;i++)
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UVBox.Add((*fi).WT(i).P());
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}
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return UVBox;
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}
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///transform curvature to UV space
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template <class FaceType>
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vcg::Point2<typename FaceType::ScalarType> Coord3DtoUV(FaceType &f,
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typename FaceType::CoordType dir)
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{
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///then transform to UV
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CoordType bary3d=(f.P(0)+f.P(1)+f.P(2))/3.0;
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vcg::Point2<ScalarType> baryUV=(f.WT(0).P()+f.WT(1).P()+f.WT(2).P())/3.0;
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CoordType dir3d=bary3d+dir;
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CoordType baryCoordsUV;
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vcg::InterpolationParameters<FaceType,ScalarType>(f,dir3d,baryCoordsUV);
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vcg::Point2<ScalarType> dirUV=baryCoordsUV.X()*f.WT(0).P()+
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baryCoordsUV.Y()*f.WT(1).P()+
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baryCoordsUV.Z()*f.WT(2).P()-baryUV;
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dirUV.Normalize();
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return dirUV;
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}
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} //End Namespace Tri
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} // End Namespace vcg
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#endif |