Fix some rare asserts with new simple/random particle distribution code.

Optimization in binary search could lead to equality instead of expected strictly greater than value.
Harmless but noisy, and better be strict here.

reported by sergey on irc (with koro cycles benchmark file), thanks.

1 files changed, 4 insertions, 3 deletions

diff --git a/source/blender/blenkernel/intern/particle_distribute.c b/source/blender/blenkernel/intern/particle_distribute.c
index 0d7fe04a1e4..7830e4eb650 100644
--- a/source/blender/blenkernel/intern/particle_distribute.c
+++ b/source/blender/blenkernel/intern/particle_distribute.c
@@ -408,10 +408,10 @@ static int distribute_binary_search(float *sum, int n, float value)
 			return mid;
 		
 		if (sum[mid] > value) {
-			high = mid - 1;
+			high = mid;
 		}
 		else {
-			low = mid + 1;
+			low = mid;
 		}
 	}
 
@@ -1056,7 +1056,8 @@ static int psys_thread_context_init_distribute(ParticleThreadContext *ctx, Parti
 			const float pos = BLI_frand() * element_sum[totmapped - 1];
 			const int eidx = distribute_binary_search(element_sum, totmapped, pos);
 			particle_element[p] = element_map[eidx];
-			BLI_assert(pos <= element_sum[eidx] && pos > (eidx ? element_sum[eidx - 1] : 0.0f));
+			BLI_assert(pos <= element_sum[eidx]);
+			BLI_assert(eidx ? (pos > element_sum[eidx - 1]) : (pos >= 0.0f));
 			jitter_offset[particle_element[p]] = pos;
 		}
 	}