untransform-distance

Function

Summary

Transforms a distance by the rotation and scale of the inverse of a given transform.

Signature

untransform-distance transform dx dy => x y

Arguments

transform

A transform

dx

A real number

dy

A real number

Values

x

A real number

y

A real number

Description

Theuntransform-distance function transform the distance (dx dy) by the rotation and scale of the effective inverse of transform. The translation in the inverse transform is ignored. The transformed distance (dx dy) is returned as two values.

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LispWorks CAPI Reference Manual - 17 Oct 1998

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