88 lines
3.4 KiB
C++
88 lines
3.4 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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/****************************************************************************
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History
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****************************************************************************/
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#ifndef __VCGLIB_EDGE_DISTANCE
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#define __VCGLIB_EDGE_DISTANCE
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#include <vcg/math/base.h>
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#include <vcg/space/point3.h>
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#include <vcg/space/segment3.h>
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namespace vcg {
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namespace edge{
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/*Point edge distance*/
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template <class EdgeType>
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bool PointDistance( const EdgeType &e,
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const vcg::Point3<typename EdgeType::ScalarType> & q,
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typename EdgeType::ScalarType & dist,
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vcg::Point3<typename EdgeType::ScalarType> & p )
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{
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vcg::Segment3<typename EdgeType::ScalarType> s;
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s.P0()=e.V(0)->P();
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s.P1()=e.V(1)->P();
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typename EdgeType::CoordType nearest;
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nearest=vcg::ClosestPoint<typename EdgeType::ScalarType>(s,q);
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typename EdgeType::ScalarType d=(q-nearest).Norm();
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if (d<dist){
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dist=d;
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p=nearest;
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return true;
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}
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else
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return false;
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}
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template <class S>
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class PointDistanceFunctor {
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public:
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typedef S ScalarType;
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typedef Point3<ScalarType> QueryType;
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static inline const Point3<ScalarType> & Pos(const QueryType & qt) {return qt;}
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template <class EDGETYPE, class SCALARTYPE>
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inline bool operator () (const EDGETYPE & e, const Point3<SCALARTYPE> & p, SCALARTYPE & minDist, Point3<SCALARTYPE> & q) {
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const Point3<typename EDGETYPE::ScalarType> fp = Point3<typename EDGETYPE::ScalarType>::Construct(p);
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Point3<typename EDGETYPE::ScalarType> fq;
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typename EDGETYPE::ScalarType md = (typename EDGETYPE::ScalarType)(minDist);
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const bool ret = vcg::edge::PointDistance(e, fp, md, fq);
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minDist = (SCALARTYPE)(md);
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q = Point3<SCALARTYPE>::Construct(fq);
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return (ret);
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}
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};
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} // end namespace edge
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} // end namespace vcg
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#endif
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