make-transform

Function

Summary

Returns a new transform object initialized according to a set of optional arguments.

Signature

make-transform &optional a b c d e f => transform

Arguments

a

A real number

b

A real number

c

A real number

d

A real number

e

A real number

f

A real number

Values

transform

A transform

Description

Themake-transform function returns a new transform object initialized according to the optional args. The default args make the unit transform.

Default values are as follows: a and d are 1; b, c, e, and f are 0. The transform matrix is

    a  b  0
    c  d  0
    e  f  1

for generalized two dimensional points of the form(x y 1).

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LispWorks CAPI Reference Manual - 17 Oct 1998

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