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added intersection control between bounding boxes for intersection between segment and triangle function

This commit is contained in:
Nico Pietroni 2006-10-25 16:04:32 +00:00
parent a8b6014a73
commit ad5a634220
1 changed files with 18 additions and 2 deletions
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20
vcg/space/intersection3.h
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@ -24,6 +24,9 @@
History
$Log: not supported by cvs2svn $
Revision 1.26 2006/09/14 08:39:07 ganovelli
Intersection_sphere_sphere added
Revision 1.25 2006/06/06 14:35:31 zifnab1974
Changes for compilation on linux AMD64. Some remarks: Linux filenames are case-sensitive. _fileno and _filelength do not exist on linux
@ -546,6 +549,19 @@ bool Intersection_Segment_Triangle( const vcg::Segment3<ScalarType> & seg,
Point3<ScalarType> & vert2,
ScalarType & a ,ScalarType & b, ScalarType & dist)
{
//control intersection of bounding boxes
vcg::Box3<ScalarType> bb0,bb1;
bb0.Add(seg.P0());
bb0.Add(seg.P1());
bb1.Add(vert0);
bb1.Add(vert1);
bb1.Add(vert2);
Point3<ScalarType> inter;
if (!bb0.Collide(bb1))
return false;
if (!vcg::Intersection_Segment_Box(bb1,seg,inter))
return false;
//first set both directions of ray
vcg::Ray3<ScalarType> ray;
vcg::Point3<ScalarType> dir;
@ -553,9 +569,9 @@ bool Intersection_Segment_Triangle( const vcg::Segment3<ScalarType> & seg,
dir.Normalize();
ray.Set(seg.P0(),dir);
//then control for each direction the interseciton with triangle
//then control for each direction the intersection with triangle
if ((Intersection<ScalarType>(ray,vert0,vert1,vert2,a,b,dist))
||(Intersection<ScalarType>(ray,vert0,vert2,vert1,a,b,dist)))
||(Intersection<ScalarType>(ray,vert1,vert0,vert2,b,a,dist)))
return (dist<(seg.P1()-seg.P0()).Norm());
else
return(false);