Affine transformation
GEOMETRIC TRANSFORMATION THAT PRESERVES LINES BUT NOT ANGLES NOR THE ORIGIN
Affine map; Affine function; Affine transformations; Affine transform; Affine mapping; Affinity (mathematics); Affine Transform; Affine transformation matrix; Affine-linear function
In Euclidean geometry, an affine transformation, or an affinity (from the Latin, affinis, "connected with"), is a geometric transformation that preserves lines and parallelism (but not necessarily distances and angles).