Commit: 5e216a6aa9bb7ea6c643d5b873cfae871d434925
Author: Sergey Sharybin
Date: Thu Jul 10 17:42:38 2014 +0600
https://developer.blender.org/rB5e216a6aa9bb7ea6c643d5b873cfae871d434925
Fix T41005: Seemingly random crashes with cycles rendering
Fix T41013: OSL and Crash
Fix T40989: Intermittent crash clicking material color selector
Issue was caused by not enough precision for inversion threshold.
Use double precision for this threshold now. We might want to
investigate this code a bit more further, stock implementation
uses doubles for all computation. Using floats might be a reason
of bad rows distribution in theory.
===================================================================
M intern/cycles/render/shader.cpp
===================================================================
diff --git a/intern/cycles/render/shader.cpp b/intern/cycles/render/shader.cpp
index b968580..351efca 100644
--- a/intern/cycles/render/shader.cpp
+++ b/intern/cycles/render/shader.cpp
@@ -89,7 +89,7 @@ static void beckmann_table_rows(float *table, int row_from,
int row_to)
int index_slope_x = 0;
for(int index_U = 0; index_U < BECKMANN_TABLE_SIZE; ++index_U) {
- const float U = 0.0000001f + 0.9999998f * index_U /
(float)(BECKMANN_TABLE_SIZE - 1);
+ const double U = 0.0000001 + 0.9999998 * index_U /
(double)(BECKMANN_TABLE_SIZE - 1);
/* inverse CDF_P22_omega_i, solve Eq.(11) */
while(CDF_P22_omega_i[index_slope_x] <= U)
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