public static Transform2D Translate(float x, float y)
{
var t = new Transform2D ();
t.M11 = 1;
t.M22 = 1;
//t.M33 = 1;
t.M13 = x;
t.M23 = y;
return t;
}
public static Transform2D Identity()
{
var t = new Transform2D ();
t.M11 = 1;
t.M22 = 1;
//t.M33 = 1;
return t;
}
public static Transform2D Scale(float x, float y)
{
var t = new Transform2D ();
t.M11 = x;
t.M22 = y;
//t.M33 = 1;
return t;
}
public static Transform2D operator *(Transform2D l, Transform2D r)
{
var t = new Transform2D ();
t.M11 = l.M11 * r.M11 + l.M12 * r.M21;// +l.M13 * r.M31;
t.M12 = l.M11 * r.M12 + l.M12 * r.M22;// +l.M13 * r.M32;
t.M13 = l.M11 * r.M13 + l.M12 * r.M23 + l.M13;// *r.M33;
t.M21 = l.M21 * r.M11 + l.M22 * r.M21;// +l.M23 * r.M31;
t.M22 = l.M21 * r.M12 + l.M22 * r.M22;// +l.M23 * r.M32;
t.M23 = l.M21 * r.M13 + l.M22 * r.M23 + l.M23;// *r.M33;
//t.M31 = l.M31 * r.M11 + l.M32 * r.M21 + l.M33 * r.M31;
//t.M32 = l.M31 * r.M12 + l.M32 * r.M22 + l.M33 * r.M32;
//t.M33 = l.M31 * r.M13 + l.M32 * r.M23 + l.M33 * r.M33;
return t;
}