untransform-distances

untransform-distances Function

Summary

Transforms a list of integer pairs representing distances by the inverse of a transform.

Package

graphics-ports

Signature

untransform-distances transform distances => result

Arguments

`transform`⇩	A transform.
`distances`⇩	A list of pairs of real numbers.

Values

result

A list of pairs of real numbers.

Description

The function untransform-distances transforms a list of alternating (dx dy) pairs in distances by the effective inverse of transform. Transformed values are returned as a new list.

Notes

See graphics-state for details of how a transform is used.