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added PointDistance function

This commit is contained in:
Nico Pietroni 2006-06-01 08:38:58 +00:00
parent f949a83faf
commit 3e649c465e
1 changed files with 47 additions and 0 deletions
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47
vcg/space/triangle3.h
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@ -24,6 +24,9 @@
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$Log: not supported by cvs2svn $
Revision 1.7 2006/03/01 15:35:09 pietroni
compiled InterspolationParameters function
Revision 1.6 2006/01/22 10:00:56 cignoni
Very Important Change: Area->DoubleArea (and no more Area function)
@ -48,6 +51,8 @@ Initial commit
#define __VCG_TRIANGLE3
#include <vcg/space/box3.h>
#include <vcg/space/plane3.h>
#include <vcg/space/segment3.h>
namespace vcg {
@ -283,6 +288,48 @@ typename TriangleType::ScalarType Perimeter(const TriangleType &t)
Distance(t.P(2),t.P(0));
}
template<class TriangleType>
void PointDistance(const TriangleType &t,
typename TriangleType::CoordType & q,
typename TriangleType::ScalarType & dist,
typename TriangleType::CoordType & p )
{
typedef typename TriangleType::CoordType CoordType;
typedef typename TriangleType::ScalarType ScalarType;
CoordType clos[4];
ScalarType distv[4];
///find distance on the plane
vcg::Plane3<ScalarType> plane;
plane.Init(t.P(0),t.P(1),t.P(2));
clos[0]=plane.Projection(q);
distv[0]=(clos[0]-p).Norm();
//distance from the edges
vcg::Segment3<ScalarType> e0=vcg::Segment3<ScalarType>(t.P(0),t.P(1));
vcg::Segment3<ScalarType> e1=vcg::Segment3<ScalarType>(t.P(1),t.P(2));
vcg::Segment3<ScalarType> e2=vcg::Segment3<ScalarType>(t.P(2),t.P(0));
clos[1]=ClosestPoint<ScalarType>( e0, q);
clos[2]=ClosestPoint<ScalarType>( e1, q);
clos[3]=ClosestPoint<ScalarType>( e2, q);
distv[1]=(clos[1]-p).Norm();
distv[2]=(clos[2]-p).Norm();
distv[3]=(clos[3]-p).Norm();
int min=0;
///find minimum distance
for (int i=1;i<4;i++)
{
if (distv[i]<distv[min])
min=i;
}
p=clos[min];
dist=distv[min];
}
} // end namespace