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- corrected and renamed distance to point ( function TrianglePointDistance)

This commit is contained in:
Nico Pietroni 2007-04-04 23:23:55 +00:00
parent 99afe015fd
commit 511f80625d
1 changed files with 34 additions and 16 deletions
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48
vcg/space/triangle3.h
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@ -24,6 +24,9 @@
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$Log: not supported by cvs2svn $ $Log: not supported by cvs2svn $
Revision 1.12 2007/01/13 00:25:23 cignoni
Added (Normalized) Normal version templated on three points (instead forcing the creation of a new triangle)
Revision 1.11 2006/10/17 06:51:33 fiorin Revision 1.11 2006/10/17 06:51:33 fiorin
In function Barycenter, replaced calls to (the inexistent) cP(i) with P(i) In function Barycenter, replaced calls to (the inexistent) cP(i) with P(i)
@ -322,44 +325,59 @@ typename TriangleType::ScalarType Perimeter(const TriangleType &t)
} }
template<class TriangleType> template<class TriangleType>
void PointDistance(const TriangleType &t, void TrianglePointDistance(const TriangleType &t,
typename TriangleType::CoordType & q, const typename TriangleType::CoordType & q,
typename TriangleType::ScalarType & dist, typename TriangleType::ScalarType & dist,
typename TriangleType::CoordType & p ) typename TriangleType::CoordType & closest )
{ {
typedef typename TriangleType::CoordType CoordType; typedef typename TriangleType::CoordType CoordType;
typedef typename TriangleType::ScalarType ScalarType; typedef typename TriangleType::ScalarType ScalarType;
CoordType clos[4]; CoordType clos[3];
ScalarType distv[4]; ScalarType distv[3];
CoordType clos_proj;
ScalarType distproj;
///find distance on the plane ///find distance on the plane
vcg::Plane3<ScalarType> plane; vcg::Plane3<ScalarType> plane;
plane.Init(t.P(0),t.P(1),t.P(2)); plane.Init(t.P(0),t.P(1),t.P(2));
clos[0]=plane.Projection(q); clos_proj=plane.Projection(q);
distv[0]=(clos[0]-p).Norm();
///control if inside/outside
CoordType n=(t.P(1)-t.P(0))^(t.P(2)-t.P(0));
CoordType n0=(t.P(0)-clos_proj)^(t.P(1)-clos_proj);
CoordType n1=(t.P(1)-clos_proj)^(t.P(2)-clos_proj);
CoordType n2=(t.P(2)-clos_proj)^(t.P(0)-clos_proj);
distproj=(clos_proj-q).Norm();
if (((n*n0)>=0)&&((n*n1)>=0)&&((n*n2)>=0))
{
closest=clos_proj;
dist=distproj;
return;
}
//distance from the edges //distance from the edges
vcg::Segment3<ScalarType> e0=vcg::Segment3<ScalarType>(t.P(0),t.P(1)); 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> e1=vcg::Segment3<ScalarType>(t.P(1),t.P(2));
vcg::Segment3<ScalarType> e2=vcg::Segment3<ScalarType>(t.P(2),t.P(0)); vcg::Segment3<ScalarType> e2=vcg::Segment3<ScalarType>(t.P(2),t.P(0));
clos[1]=ClosestPoint<ScalarType>( e0, q); clos[0]=ClosestPoint<ScalarType>( e0, q);
clos[2]=ClosestPoint<ScalarType>( e1, q); clos[1]=ClosestPoint<ScalarType>( e1, q);
clos[3]=ClosestPoint<ScalarType>( e2, q); clos[2]=ClosestPoint<ScalarType>( e2, q);
distv[1]=(clos[1]-p).Norm(); distv[0]=(clos[0]-q).Norm();
distv[2]=(clos[2]-p).Norm(); distv[1]=(clos[1]-q).Norm();
distv[3]=(clos[3]-p).Norm(); distv[2]=(clos[2]-q).Norm();
int min=0; int min=0;
///find minimum distance ///find minimum distance
for (int i=1;i<4;i++) for (int i=1;i<3;i++)
{ {
if (distv[i]<distv[min]) if (distv[i]<distv[min])
min=i; min=i;
} }
p=clos[min]; closest=clos[min];
dist=distv[min]; dist=distv[min];
} }