Function

Summary

Transforms a list of points by the inverse of a given transform.

Package

graphics-ports

Signature

untransform-points transform points &optional into => result

Arguments

transform

A transform.

points

A list of pairs of real numbers.

into

A list.

Values

result

A list of pairs of real numbers.

Description

The function untransform-points transforms a list of alternating ( x y ) pairs in points by the effective inverse of transform . If into is supplied it must be a list the same length as points . If into is not supplied, a new list is returned.