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fix LIT bug

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This commit is contained in:
Brian Paul 2005-10-29 16:05:18 +00:00
parent 4174f79b19
commit af13891dbd
1 changed files with 9 additions and 1 deletions
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10
src/mesa/swrast/s_nvfragprog.c
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@ -821,7 +821,15 @@ execute_program( GLcontext *ctx,
result[0] = 1.0F;
result[1] = a[0];
/* XXX we could probably just use pow() here */
result[2] = (a[0] > 0.0F) ? EXPF(a[3] * LOGF(a[1])) : 0.0F;
if (a[0] > 0.0F) {
if (a[1] == 0.0 && a[3] == 0.0)
result[2] = 1.0;
else
result[2] = EXPF(a[3] * LOGF(a[1]));
}
else {
result[2] = 0.0;
}
result[3] = 1.0F;
store_vector4( inst, machine, result );
}