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"const" is the right keyword, but I can't do that without adding a bunch
of really annoying and ugly const casts everywhere, and frankly,
that's really stupid, so instead, just don't make them const.
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Nice for stack backtraces.
Windows-only for now.
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This fixes broken variable indexing into the gl_Eye/ObjectPlaneS/T/R/Q arrays.
See bug 20986.
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Wow, how long's that been there? Embarrassing.
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Check for NaN/Inf, print exec vectors, print temp registers.
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The 'dots' register wasn't getting properly un-negated and un-swizzled
after emitting the code for back-face lighting. So, if more than one
light source was enabled, the specular exponent for the next light source
was wrong.
During execution we were evaluating pow(x, y) where y was negative instead
of positive. This led to the outcome being zero or NaN.
This fixes the occasional black triangles seen in isosurf when hacked to
enable two-sided lighting.
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And print/warn NaN/Inf in print_vertex().
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(cherry picked from commit b65bc1b6cb72df950c2e26446936804dfcdc432c)
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A breakpoint is much nicer than abort when gdb is attached.
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Clearly, something else is wrong.
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