Transforms the distance vector (dx,dy) by matrix. This is
similar to Matrix.transformPoint except that the translation
components of the transformation are ignored. The calculation of
the returned vector is as follows:
Affine transformations are position invariant, so the same vector
always transforms to the same vector. If (x1,y1) transforms
to (x2,y2) then (x1+dx1,y1+dy1) will transform to
(x1+dx2,y1+dy2) for all values of x1 and x2.
Transforms the distance vector (dx,dy) by matrix. This is similar to Matrix.transformPoint except that the translation components of the transformation are ignored. The calculation of the returned vector is as follows:
<programlisting> dx2 = dx1 * xx + dy1 * xy; dy2 = dx1 * yx + dy1 * yy; </programlisting>
Affine transformations are position invariant, so the same vector always transforms to the same vector. If (x1,y1) transforms to (x2,y2) then (x1+dx1,y1+dy1) will transform to (x1+dx2,y1+dy2) for all values of x1 and x2.