| public Transform ( double &px, double &py ) : void | ||
| px | double | |
| py | double | |
| return | void | |
public void scaling(out double x, out double y)
{
double x1 = 0.0;
double y1 = 0.0;
double x2 = 1.0;
double y2 = 1.0;
Perspective t = new Perspective(this);
t *= Affine.NewRotation(-rotation());
t.Transform(ref x1, ref y1);
t.Transform(ref x2, ref y2);
x = x2 - x1;
y = y2 - y1;
}
// Inverse transformation of x and y. It works slow because
// it explicitly inverts the matrix on every call. For massive
// operations it's better to invert() the matrix and then use
// direct transformations.
public void inverse_transform(ref double x, ref double y)
{
Perspective t = new Perspective(this);
if (t.invert()) t.Transform(ref x, ref y);
}