diff options
| author | Brian Paul <brian.paul@tungstengraphics.com> | 2001-05-09 21:36:52 +0000 |
|---|---|---|
| committer | Brian Paul <brian.paul@tungstengraphics.com> | 2001-05-09 21:36:52 +0000 |
| commit | b9f2494bfc990fe7269feeb441a3893aceb7569e (patch) | |
| tree | 76f19b13bc1dd1f6925db5cf8c0f9aee40bc2ae1 /progs/demos | |
| parent | 91979127ecec0f3d60507f9197b1f9fd00e4e145 (diff) | |
fixed FP underflow problem in kfact computation
Diffstat (limited to 'progs/demos')
| -rw-r--r-- | progs/demos/ray.c | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/progs/demos/ray.c b/progs/demos/ray.c index 44289b7f96..2173b54fd4 100644 --- a/progs/demos/ray.c +++ b/progs/demos/ray.c @@ -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; |