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fixed FP underflow problem in kfact computation

This commit is contained in:
Brian Paul 2001-05-09 21:36:52 +00:00
parent 91979127ec
commit b9f2494bfc
1 changed files with 5 additions and 8 deletions
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13
progs/demos/ray.c
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@ -386,8 +386,7 @@ colorcheckmap(float ppos[3], float c[3])
h[1] = 0.5f * (vdir[1] + ldir[1]);
h[2] = 0.5f * (vdir[2] + ldir[2]);
kfact = dprod(h, norm);
kfact =
kfact * kfact * kfact * kfact * kfact * kfact * kfact * 7.0f * 255.0f;
kfact = pow(kfact, 6.0) * 7.0 * 255.0;
r = r * dfact + kfact;
g = g * dfact + kfact;
@ -487,12 +486,10 @@ updatereflectmap(int slot)
h[1] = 0.5f * (vdir[1] + ldir[1]);
h[2] = 0.5f * (vdir[2] + ldir[2]);
kfact = dprod(h, norm);
kfact *= kfact;
kfact *= kfact;
kfact *= kfact;
kfact *= kfact;
kfact *= 10.0f;
}
kfact = pow(kfact, 4.0);
if (kfact < 1.0e-10)
kfact = 0.0;
}
r = dfact + kfact;
g = dfact + kfact;