diff options
| -rw-r--r-- | scene/3d/voxel_light_baker.cpp | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/scene/3d/voxel_light_baker.cpp b/scene/3d/voxel_light_baker.cpp index 4c52d0bb1b..bf0f801e32 100644 --- a/scene/3d/voxel_light_baker.cpp +++ b/scene/3d/voxel_light_baker.cpp @@ -1711,11 +1711,14 @@ Vector3 VoxelLightBaker::_compute_ray_trace_at_pos(const Vector3 &p_pos, const V const Light *light = bake_light.ptr(); const Cell *cells = bake_cells.ptr(); + // Prevent false sharing when running on OpenMP + uint32_t local_rng_state = *rng_state; + for (int i = 0; i < samples; i++) { - float random_angle1 = (((xorshift32(rng_state) % 65535) / 65535.0) * 2.0 - 1.0) * spread; + float random_angle1 = (((xorshift32(&local_rng_state) % 65535) / 65535.0) * 2.0 - 1.0) * spread; Vector3 axis(0, sin(random_angle1), cos(random_angle1)); - float random_angle2 = ((xorshift32(rng_state) % 65535) / 65535.0) * Math_PI * 2.0; + float random_angle2 = ((xorshift32(&local_rng_state) % 65535) / 65535.0) * Math_PI * 2.0; Basis rot(Vector3(0, 0, 1), random_angle2); axis = rot.xform(axis); @@ -1792,6 +1795,8 @@ Vector3 VoxelLightBaker::_compute_ray_trace_at_pos(const Vector3 &p_pos, const V } } + // Make sure we don't reset this thread's RNG state + *rng_state = local_rng_state; return accum / samples; } |