BLI: add probabilistic rounding utility

1 files changed, 2 insertions, 4 deletions

diff --git a/source/blender/nodes/geometry/nodes/node_geo_distribute_points_on_faces.cc b/source/blender/nodes/geometry/nodes/node_geo_distribute_points_on_faces.cc
index bdd4d74fe4b..8e28a4ba9b9 100644
--- a/source/blender/nodes/geometry/nodes/node_geo_distribute_points_on_faces.cc
+++ b/source/blender/nodes/geometry/nodes/node_geo_distribute_points_on_faces.cc
@@ -114,10 +114,8 @@ static void sample_mesh_surface(const Mesh &mesh,
     const int looptri_seed = noise::hash(looptri_index, seed);
     RandomNumberGenerator looptri_rng(looptri_seed);
 
-    const float points_amount_fl = area * base_density * looptri_density_factor;
-    const float add_point_probability = fractf(points_amount_fl);
-    const bool add_point = add_point_probability > looptri_rng.get_float();
-    const int point_amount = (int)points_amount_fl + (int)add_point;
+    const int point_amount = looptri_rng.round_probabilistic(area * base_density *
+                                                             looptri_density_factor);
 
     for (int i = 0; i < point_amount; i++) {
       const float3 bary_coord = looptri_rng.get_barycentric_coordinates();