103 lines
3.9 KiB
C++
103 lines
3.9 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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/****************************************************************************
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History
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$Log: not supported by cvs2svn $
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****************************************************************************/
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#ifndef __VCGLIB_FACEFUNCTORS
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#define __VCGLIB_FACEFUNCTORS
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// vcg headers
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#include <vcg/space/point3.h>
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#include <vcg/space/box3.h>
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#include <vcg/space/line3.h>
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#include <vcg/space/intersection3.h>
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#include <vcg/simplex/face/distance.h>
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namespace vcg {
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class FaceBarycenterFunctor {
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public:
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template <class FACETYPE, class COORDTYPE>
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inline void operator () (const FACETYPE & f, COORDTYPE & b) {
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b = COORDTYPE::Construct(f.Barycenter());
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}
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};
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class FaceBoxFunctor {
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public:
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template <class FACETYPE, class BOXTYPE>
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inline void operator () (const FACETYPE & f, BOXTYPE & b) {
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b.Set(Point3<BOXTYPE::ScalarType>::Construct(f.P(0)));
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b.Add(Point3<BOXTYPE::ScalarType>::Construct(f.P(1)));
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b.Add(Point3<BOXTYPE::ScalarType>::Construct(f.P(2)));
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}
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};
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class FacePointDistanceFunctor {
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public:
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template <class FACETYPE, class COORDTYPE>
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inline bool operator () (const FACETYPE & f, const COORDTYPE & p, typename COORDTYPE::ScalarType & minDist, COORDTYPE & q) {
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const Point3<typename FACETYPE::ScalarType> fp = Point3<typename FACETYPE::ScalarType>::Construct(p);
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Point3<typename FACETYPE::ScalarType> fq;
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typename FACETYPE::ScalarType md = (typename FACETYPE::ScalarType)(minDist);
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const bool ret = face::PointDistance(f, fp, md, fq);
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minDist = (typename COORDTYPE::ScalarType)(md);
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q = COORDTYPE::Construct(fq);
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return (ret);
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}
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};
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template <bool BACKFACETEST = true>
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class FaceRayIntersectFunctor {
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public:
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template <class FACETYPE, class COORDTYPE>
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inline bool operator () (const FACETYPE & f, const COORDTYPE & rayOrigin, const COORDTYPE & rayDirection, typename COORDTYPE::ScalarType & t, COORDTYPE & q) {
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typedef typename COORDTYPE::ScalarType ScalarType;
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Line3<ScalarType, false> ln(rayOrigin, rayDirection);
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ScalarType a;
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ScalarType b;
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bool bret = Intersection(ln, f.P(0), f.P(1), f.P(2), a, b, t);
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if (BACKFACETEST) {
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if (!bret) {
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bret = Intersection(ln, f.P(0), f.P(2), f.P(1), a, b, t);
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}
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}
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if (bret) {
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q = rayOrigin + rayDirection * t;
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return (true);
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}
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return (false);
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}
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};
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} // end namespace vcg
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#endif // #ifndef __VCGLIB_FACEFUNCTORS
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