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added GetUV

This commit is contained in:
ganovelli 2004-11-09 15:49:07 +00:00
parent 1189399728
commit 6e38d819bb
1 changed files with 29 additions and 1 deletions
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30
vcg/space/point3.h
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@ -24,6 +24,9 @@
History
$Log: not supported by cvs2svn $
Revision 1.18 2004/10/13 12:45:51 cignoni
Better Doxygen documentation
Revision 1.17 2004/09/10 14:01:40 cignoni
Added polar to cartesian
@ -88,7 +91,7 @@ protected:
public:
typedef P3ScalarType ScalarType;
enum {Dimension = 3};
//@{
@ -456,6 +459,31 @@ P3ScalarType PSDist( const Point3<P3ScalarType> & p,
}
template <class P3ScalarType>
void GetUV( Point3<P3ScalarType> &n,Point3<P3ScalarType> &u, Point3<P3ScalarType> &v, Point3<P3ScalarType> up=Point3<P3ScalarType>(0,1,0))
{
n.Normalize();
const double LocEps=double(1e-7);
u=n^up;
double len = u.Norm();
if(len < LocEps)
{
if(fabs(n[0])<fabs(n[1])){
if(fabs(n[0])<fabs(n[2])) up=Point3<P3ScalarType>(1,0,0); // x is the min
else up=Point3<P3ScalarType>(0,0,1); // z is the min
}else {
if(fabs(n[1])<fabs(n[2])) up=Point3<P3ScalarType>(0,1,0); // y is the min
else up=Point3<P3ScalarType>(0,0,1); // z is the min
}
u=n^up;
}
u.Normalize();
v=n^u;
v.Normalize();
Point3<P3ScalarType> uv=u^v;
}
typedef Point3<short> Point3s;
typedef Point3<int> Point3i;
typedef Point3<float> Point3f;