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Cleanup: avoid harmless but unnecessary float division by zero

This commit is contained in:
Brecht Van Lommel 2020-11-30 12:21:44 +01:00
parent 057c15b549
commit c986e46be7
Notes: blender-bot 2023-12-08 16:39:08 +01:00 
Referenced by issue #83185, Cycles: Divide by zero with sky texture
1 changed files with 7 additions and 5 deletions
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12
intern/cycles/render/light.cpp
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@ -551,17 +551,19 @@ static void background_cdf(
cond_cdf[i * cdf_width + j - 1].x / res_x;
}
float cdf_total = cond_cdf[i * cdf_width + res_x - 1].y +
cond_cdf[i * cdf_width + res_x - 1].x / res_x;
float cdf_total_inv = 1.0f / cdf_total;
const float cdf_total = cond_cdf[i * cdf_width + res_x - 1].y +
cond_cdf[i * cdf_width + res_x - 1].x / res_x;
/* stuff the total into the brightness value for the last entry, because
* we are going to normalize the CDFs to 0.0 to 1.0 afterwards */
cond_cdf[i * cdf_width + res_x].x = cdf_total;
if (cdf_total > 0.0f)
for (int j = 1; j < res_x; j++)
if (cdf_total > 0.0f) {
const float cdf_total_inv = 1.0f / cdf_total;
for (int j = 1; j < res_x; j++) {
cond_cdf[i * cdf_width + j].y *= cdf_total_inv;
}
}
cond_cdf[i * cdf_width + res_x].y = 1.0f;
}