diff options
| -rw-r--r-- | scene/3d/voxel_light_baker.cpp | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/scene/3d/voxel_light_baker.cpp b/scene/3d/voxel_light_baker.cpp index edb9b9efd6..5e4cef586e 100644 --- a/scene/3d/voxel_light_baker.cpp +++ b/scene/3d/voxel_light_baker.cpp @@ -1645,13 +1645,13 @@ Vector3 VoxelLightBaker::_compute_pixel_light_at_pos(const Vector3 &p_pos, const uint32_t xorshiftstate[] = { 123 }; // anything non-zero will do here -_ALWAYS_INLINE_ uint32_t xorshift32() { +_ALWAYS_INLINE_ uint32_t xorshift32(uint32_t *seed) { /* Algorithm "xor" from p. 4 of Marsaglia, "Xorshift RNGs" */ - uint32_t x = xorshiftstate[0]; + uint32_t x = *seed; x ^= x << 13; x ^= x >> 17; x ^= x << 5; - xorshiftstate[0] = x; + *seed = x; return x; } @@ -1677,11 +1677,16 @@ 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(); + uint32_t seed = 0; + while (seed == 0) { + seed = rand(); //system rand is thread safe, do not replace by Math:: random. + } + for (int i = 0; i < samples; i++) { - float random_angle1 = (((xorshift32() % 65535) / 65535.0) * 2.0 - 1.0) * spread; + float random_angle1 = (((xorshift32(&seed) % 65535) / 65535.0) * 2.0 - 1.0) * spread; Vector3 axis(0, sin(random_angle1), cos(random_angle1)); - float random_angle2 = ((xorshift32() % 65535) / 65535.0) * Math_PI * 2.0; + float random_angle2 = ((xorshift32(&seed) % 65535) / 65535.0) * Math_PI * 2.0; Basis rot(Vector3(0, 0, 1), random_angle2); axis = rot.xform(axis); |