untransform-position

Generic function

Summary

Undoes the previous transformation on the point x,y, returning the original point.

Signature

untransform-position transform x y => x y

Arguments

transform

An instance of type <transform>.

x

An instance of type <real>.

y

An instance of type <real>.

Values

x

An instance of type <real>.

y

An instance of type <real>.

Exceptions

<singular-transform> cannot be inverted.

Library

duim-geometry

Module

duim-geometry

Description

Undoes the previous transformation on the point x,y, returning the original point. This is exactly equivalent to:

transform-position(invert-transform(transform))

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Functional Developer Library Reference: DUIM - 3 Dec 1998