//-----------------------------------------------------------------------------
// Sorts the components of a vector
//-----------------------------------------------------------------------------
static inline void SortAbsVectorComponents( const Vector& src, int* pVecIdx )
{
Vector absVec( fabs(src[0]), fabs(src[1]), fabs(src[2]) );
int maxIdx = (absVec[0] > absVec[1]) ? 0 : 1;
if (absVec[2] > absVec[maxIdx])
{
maxIdx = 2;
}
// always choose something right-handed....
switch( maxIdx )
{
case 0:
pVecIdx[0] = 1;
pVecIdx[1] = 2;
pVecIdx[2] = 0;
break;
case 1:
pVecIdx[0] = 2;
pVecIdx[1] = 0;
pVecIdx[2] = 1;
break;
case 2:
pVecIdx[0] = 0;
pVecIdx[1] = 1;
pVecIdx[2] = 2;
break;
}
}
bool pointInSphere(GLfloat *p1, GLfloat *p2, GLfloat radius)
{
GLfloat result[3];
diff(p1,p2,result);
if(absVec(result) <= radius)
return true;
return false;
}
GLfloat* norm(GLfloat *vec, GLfloat *result)
{
GLfloat abs = absVec(vec);
if(abs == 1.0)
return vec;
if(abs != 0.0)
{
setVec(result, vec[0] / abs, vec[1] / abs, vec[2] / abs);
return result;
}
setVec(result, 0.0, 0.0, 0.0);
return result;
}