Answers to some of my past questions

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Dewey Anderson (dewey++at++evt.com)
Thu, 22 May 1997 16:08:40 -0600


Just thought I'd pass on what I learned about a couple problems I posted here.

On Mar 14th I asked about what looked like a perspective error in the X
direction on an O2 with Performer eoe 2.0.3. This error did not show on out
Impact with eoe 2.0. Installing the patch on the O2 that upgraded to Performer
eoe 2.0.4 made this problem go away so apparently it was a bug introduced into
2.0.3 and fixed in 2.0.4.

On Apr 22 I asked about textured rectangles being drawn as solid white the
first time. It didn't used to do this with eoe 2.0 but started doing this when
we moved to eoe 2.0.3 and 2.0.4. It turned out that I needed to enable
texturing BEFORE preloading my textures:

   pfEnable(PFEN_TEXTURE);
   pfuDownloadTexList( pfuMakeSceneTexList(scene), PFUTEX_APPLY );
   pfDisable(PFEN_TEXTURE);

(Originally, I only had the pfuDownloadTexList() call.) In eoe 2.0 this enable
was not necessary. In 2.0.3 and later it appears that it IS necessary so it
would seem that was a change in Performer requirements introduced in 2.0.3. (I
disable texturing immediately afterward because this download is done before
other OpenGL drawing and it seems that leaving texturing enabled screws up the
regular non-textured OGL stuff.)

Maybe if someone else has these problems, this will help.

Dewey Anderson
dewey++at++evt.com
Evolving Video Technologies

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