Next Prev Up Top Contents Index

invert-transform

Function
Summary

Constructs the inverse of a transform.

Signature

invert-transform transform &optional into => inverse

Arguments

transform

A transform

into

A transform or nil

Values

inverse

A transform

Description

This function constructs the inverse of transform . If T is transform and T' is its inverse, then TT ' = I. If into is non- nil it is modified to contain T' and returned, otherwise a new transform is constructed and returned.


LispWorks CAPI Reference Manual - 14 Dec 2001

Next Prev Up Top Contents Index