public void RotateScaleYTo(Vec2 v)
{
Affine2D rs = CalcRotateScale(YAxis, v);
XAxis = rs.TransformNormal(XAxis);
YAxis = rs.TransformNormal(YAxis);
}
public static Affine2D operator *(Affine2D l, Affine2D r)
{
Affine2D result = new Affine2D();
result.XAxis = l.TransformNormal(r.XAxis);
result.YAxis = l.TransformNormal(r.YAxis);
result.Translation = l.TransformVector(r.Translation);
return(result);
}
//returns true if all values differ from a by less than or equal to epsilon
public bool Equals(Affine2D a, float epsilon)
{
return(Math.Abs(XAxis.X - a.XAxis.X) <= epsilon &&
Math.Abs(XAxis.Y - a.XAxis.Y) <= epsilon &&
Math.Abs(YAxis.X - a.YAxis.X) <= epsilon &&
Math.Abs(YAxis.Y - a.YAxis.Y) <= epsilon &&
Math.Abs(Translation.X - a.Translation.X) <= epsilon &&
Math.Abs(Translation.Y - a.Translation.Y) <= epsilon);
}
public void RotateScaleXTo(Vec2 v)
{
//float a,c;
///calcRSAC(out a, out c, X, v);
//Gaaaaccch!!
//Work you stupid math!!!!!!!!!!!!
//X.X = a*X.X - c*X.Y;
//X.Y = c*X.X + a*X.Y;
//Y.X = a*Y.X - c*Y.Y;
//Y.Y = c*Y.X + a*Y.Y;
//oh well, using the slow way instead....
Affine2D rs = CalcRotateScale(XAxis, v);
XAxis = rs.TransformNormal(XAxis);
YAxis = rs.TransformNormal(YAxis);
}