public TranslationMatrix Inverse()
{
TranslationMatrix t = (TranslationMatrix)Clone();
t[0, 2] *= -1;
t[1, 2] *= -1;
return(t);
}
public Vector2 ScaleFrom(Vector2 vec, double xc, double yc)
{
Matrix <double> col = FromVec2DCol(vec);
TranslationMatrix translate = new TranslationMatrix(-xc, -yc);
col = Prod(translate, col);
col = Prod(this, col);
col = Prod(translate.Inverse(), col);
return(new Vector2((float)col[0, 0], (float)col[1, 0]));
}
