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untransform-points 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
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.


CAPI User Guide and Reference Manual (Unix version) - 01 Dec 2021 19:33:02