make-transform

Function

Summary

Returns a general affine transform.

Signature

make-transform mxx mxy myx myy tx ty => transform

Arguments

mxx

An instance of type <real>.

mxy

An instance of type <real>.

myx

An instance of type <real>.

myy

An instance of type <real>.

tx

An instance of type <real>.

ty

An instance of type <real>.

Values

transform

An instance of type <transform>.

Library

duim-geometry

Module

duim-geometry

Description

Returns a general transform whose effect is:

x'= mxxx + mxyy + tx
y'= myxx + myyy + ty
 where x and y are the coordinates of a point before the transform and x' and y' are the coordinates of the corresponding point after.
 All of the arguments to make-transform must be real numbers.
 This is a convenient shorthand for make(<transform> ...).
See also
 make-reflection-transform,  page 37
 make-rotation-transform,  page 39
 make-scaling-transform,  page 40
 make-translation-transform,  page 43

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Functional Developer Library Reference: DUIM - 3 Dec 1998