Method Cairo.Matrix()->transform_distance()

Method transform_distance

array(float) transform_distance(float|int dx, float|int dy)

Description

Transforms the distance vector (dx, dy). This is similar to transform_point() except that the translation components of the transformation are ignored. The calculation of the returned vector is as follows:

dx_new = xx * dx + xy * dy;
dy_new = yx * dx + yy * dy;

Parameter dx

X component of a distance vector

Parameter dy

Y component of a distance vector

Returns

The transformed distance vector

Array
float 0	X component of the new distance vector
float 1	Y component of the new distance vector