GL error. What does it mean?

[Marc Andreessen]

In article <1991Jan30.161544.7845 at ux1.cso.uiuc.edu> marcc at yoyodyne.ncsa.uiuc.edu (Marc Cooper) writes:
>I'm getting the following error from my program, which continues to run,
>but doesn't perform as expected..
>
>ERROR #1  gl_invert4d :  ERR_SINGMATRIX

One generally sure way of getting errors like this is scaling some
dimension to 0... which is easy to do accidentally - i.e. doing
scale( 0., 0., z_factor ) instead of scale( 1., 1., z_factor ).

Check all transformations several times over - it's probably a source code
bug.

Marc

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Marc Andreessen___________University of Illinois Materials Research Laboratory
Internet: andreessen at uimrl7.mrl.uiuc.edu____________Bitnet: andreessen at uiucmrl