Vec3 BezierInterpolation(const Mat44& inv_mat,const Vec3 & P0,const Vec3 & P1,
const Vec3 & P2,const Vec3 & P3, float t)
{
// inv_mat = B Matrix, Mixture matrix.
Vec4 U = Vec4(1.0,t, t*t, t*t*t);
// A Matrix = UxB
Vec4 A = U*inv_mat;
// p(u) = UxBxP
return P0*A.GetX() + P1*A.GetY() + P2*A.GetZ() + P3*A.GetW();
};
float WeightedClusterFit::GetBestError() const
{
#if SQUISH_USE_SIMD
Vec4 x = m_xxsum * m_metricSqr;
Vec4 error = m_besterror + x.SplatX() + x.SplatY() + x.SplatZ();
return error.GetX();
#else
return m_besterror + Dot(m_xxsum, m_metricSqr);
#endif
}
Vec3::Vec3(const Vec4 & vec){
m_X = vec.GetX();
m_Y = vec.GetY();
m_Z = vec.GetZ();
}
