[PLIB-announce] Change to sgMultMat4

[Steve B. <sjb...@ai...>]

Lucas Ackerman spotted a serious problem in the PLIB/SG library.

The order of the arguments to sgMultMat4 were reversed so it
implemented   dst = B * A  rather than  dst = A * B as advertised.

I've fixed this in the latest CVS copy of PLIB - and it'll be
in the upcoming 1.2 release.

I'm taking the unusual step of mentioning this on the PLIB-ANNOUNCE
list because there is a very real chance that some existing programs
could be broken by this fix.

If your program *is* affected, you will either have to depend
on a particular version of PLIB being loaded (NASTY!) or you
should change your sources to use sgPreMultMat4 or sgPostMultMat4
which are unaffected by the change.  In that way, your code will
work OK with earlier versions of PLIB as well as the upcoming
PLIB 1.2.

Sorry about this.

-- 
Steve Baker                  http://web2.airmail.net/sjbaker1
sjb...@ai... (home)  http://www.woodsoup.org/~sbaker
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