private PVector MatrixToVec(float[][] m)
{
PVector v = new PVector();
v.X = m[0][0];
v.Y = m[1][0];
if (m.Length > 2)
{
v.Z = m[2][0];
}
return(v);
}
public PVector MatMul(float[][] a, PVector b)
{
float[][] m = VecToMatrix(b);
return(MatrixToVec(MatMul(a, m)));
}