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correct version of InterpolationParameters

This commit is contained in:
Nico Pietroni 2008-06-20 15:03:27 +00:00
parent d95f6ee798
commit 26e1c14de8
1 changed files with 12 additions and 3 deletions
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15
vcg/space/triangle2.h
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@ -86,11 +86,11 @@ bool InterpolationParameters(const CoordType & bq, ScalarType &a, ScalarType &b,
{
const ScalarType EPSILON = ScalarType(0.0001);
ScalarType AreaGlobal=(P(1) - P(0)) ^ (P(2) - P(0));
//ScalarType AreaGlobal=(P(1) - P(0)) ^ (P(2) - P(0));
ScalarType Area0=(P(2) - P(1)) ^ (bq - P(1));
ScalarType Area1=(P(0) - P(2)) ^ (bq - P(2));
ScalarType Area2=(P(1) - P(0)) ^ (bq - P(0));
ScalarType AreaGlobal=Area0+Area1+Area2;
/*if ((Area0>(AreaGlobal+EPSILON))||(Area1>(AreaGlobal+EPSILON))||(Area2>(AreaGlobal+EPSILON)))
return false;*/
a=Area0/AreaGlobal;
@ -98,16 +98,25 @@ bool InterpolationParameters(const CoordType & bq, ScalarType &a, ScalarType &b,
c=Area2/AreaGlobal;
///test inside/outside
if((a>(ScalarType)1+EPSILON)||(b>(ScalarType)1+EPSILON)||(c>(ScalarType)1+EPSILON))
if(((a>(ScalarType)1+EPSILON)||(b>(ScalarType)1+EPSILON)||(c>(ScalarType)1+EPSILON))||
((a<-EPSILON)||(b<-EPSILON)||(c<-EPSILON)))
return false;
///approximation errors
if(a>1)
a=(ScalarType)1;
if(b>1)
b=(ScalarType)1;
if(c>1)
c=(ScalarType)1;
if(a<0)
a=(ScalarType)0;
if(b<0)
b=(ScalarType)0;
if(c<0)
c=(ScalarType)0;
return true;
}