untransform-region

Generic function

Summary

Undoes the previous transformation on a region, returning the original region.

Signature

untransform-region transform region2 => region1

Arguments

transform

An instance of type <transform>.

region2

An instance of type <region>. The region to untransform.

Values

region1

An instance of type <region>. The original region.

Exceptions

<singular-transform> cannot be inverted.

Library

duim-geometry

Module

duim-geometry

Description

Undoes the previous transformation on the region region, returning the original region. This is exactly equivalent to

transform-region(invert-transform(transform region))

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Functional Developer Library Reference: DUIM - 3 Dec 1998