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Added IntersectionRayMesh overload function who return hit point, baricentric's coordinates and a pointer of intersected face.

This commit is contained in:
Paolo Cignoni 2008-10-14 14:31:35 +00:00
parent 9b0875d19e
commit c5ec73d0f7
1 changed files with 46 additions and 0 deletions
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46
vcg/complex/intersection.h
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@ -279,6 +279,52 @@ bool IntersectionRayMesh(
return hit;
}
/**
Computes the intersection between a Ray and a Mesh. Returns a 3D Pointset, baricentric's coordinates
and a pointer of intersected face.
*/
template < typename TriMeshType, class ScalarType>
bool IntersectionRayMesh(
/* Input Mesh */ TriMeshType * m,
/* Ray */ const Line3<ScalarType> & ray,
/* Intersect Point */ Point3<ScalarType> & hitPoint,
/* Baricentric coord 1*/ ScalarType &bar1,
/* Baricentric coord 2*/ ScalarType &bar2,
/* Baricentric coord 3*/ ScalarType &bar3,
/* FacePointer */ typename TriMeshType::FacePointer fp
)
{
//typedef typename TriMeshType::FaceContainer FaceContainer;
typename TriMeshType::FaceIterator fi;
bool hit=false;
if(m==0) return false;
//TriMeshType::FaceIterator fi;
//std::vector<TriMeshType::FaceType*>::iterator fi;
ScalarType dist;
Point3<ScalarType> p1;
Point3<ScalarType> p2;
Point3<ScalarType> p3;
for(fi = m->face.begin(); fi != m->face.end(); ++fi)
{
p1=vcg::Point3<ScalarType>( (*fi).P(0).X() ,(*fi).P(0).Y(),(*fi).P(0).Z() );
p2=vcg::Point3<ScalarType>( (*fi).P(1).X() ,(*fi).P(1).Y(),(*fi).P(1).Z() );
p3=vcg::Point3<ScalarType>( (*fi).P(2).X() ,(*fi).P(2).Y(),(*fi).P(2).Z() );
if(Intersection<ScalarType>(ray,p1,p2,p3,bar1,bar2,dist))
{
bar3 = (1-bar1-bar2);
hitPoint= p1*bar3 + p2*bar1 + p3*bar2;
fp = &(*fi);
hit=true;
}
}
return hit;
}
/**
Compute the intersection between a mesh and a ball.
given a mesh return a new mesh made by a copy of all the faces entirely includeded in the ball plus