Matrix.transformDistance
void transformDistance(out double dx, out double dy)Transforms the distance vector (dx,dy) by matrix. This is similar to cairo.matrix.Matrix.transformPoint except that the translation components of the transformation are ignored. The calculation of the returned vector is as follows:
<programlisting> dx_new = xx dx + xy dy; dy_new = yx dx + yy dy; </programlisting>
Parameters
dx | X component of a distance vector. An in/out parameter |
dy | Y component of a distance vector. An in/out parameter |