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Allegro CL version 10.0
Unrevised from 9.0 to 10.0.
9.0 version

nposition-transform

Arguments: position matrix

The destructive version of position-transform. The position argument is modified to be the result.

This function transforms the given position with the supplied matrix, which is a 2 by 2 array (or larger 2-dimensional array -- extra cells of the array are ignored). If the elements of matrix are floats, the returned (and modified) position will have rounded whole number components. The transform works as follows:

xnew = A(0,0)*xold + A(0,1)*yold
ynew = A(1,0)*xold + A(1,1)*yold

Copyright (c) 1998-2016, Franz Inc. Oakland, CA., USA. All rights reserved.
This page was not revised from the 9.0 page.
Created 2015.5.21.

ToCDocOverviewCGDocRelNotesFAQIndexPermutedIndex
Allegro CL version 10.0
Unrevised from 9.0 to 10.0.
9.0 version