Affiner

Category: Manipulators

Performs an affine transformation on the coordinates of the feature.

The transformation results in the x and y coordinates being modified by:

x' = Ax + By + C

y' = Dx + Ey + F

Coefficients <A> and <E> must be non-zero.

Each parameter may either be entered as a number, or can be taken from the value of a feature attribute by selecting the attribute name from the pull-down list.

An affine transformation preserves lines and parallelism in geometry. That is, any lines that were parallel before the transformation are parallel after the transformation. As well, if a number of points falling on a straight line are transformed, the resulting coordinates will fall on a straight line in the new coordinate system.

Affine transformations include translations, rotations, scalings, and reflections.