Particles: add Size attribute

2 files changed, 4 insertions, 1 deletions

diff --git a/source/blender/modifiers/intern/MOD_simulation.cc b/source/blender/modifiers/intern/MOD_simulation.cc
index 85d9b47a861..382d9a6be36 100644
--- a/source/blender/modifiers/intern/MOD_simulation.cc
+++ b/source/blender/modifiers/intern/MOD_simulation.cc
@@ -114,10 +114,12 @@ static PointCloud *modifyPointCloud(ModifierData *md,
 
   const float3 *positions = (const float3 *)CustomData_get_layer_named(
       &state->attributes, CD_PROP_FLOAT3, "Position");
+  const float *sizes = (const float *)CustomData_get_layer_named(
+      &state->attributes, CD_PROP_FLOAT, "Size");
   memcpy(pointcloud->co, positions, sizeof(float3) * state->tot_particles);
 
   for (int i = 0; i < state->tot_particles; i++) {
-    pointcloud->radius[i] = 0.03f;
+    pointcloud->radius[i] = sizes[i] / 2.0f;
   }
 
   return pointcloud;
diff --git a/source/blender/simulation/intern/simulation_collect_influences.cc b/source/blender/simulation/intern/simulation_collect_influences.cc
index 4d339f9e323..c947b28fd50 100644
--- a/source/blender/simulation/intern/simulation_collect_influences.cc
+++ b/source/blender/simulation/intern/simulation_collect_influences.cc
@@ -740,6 +740,7 @@ static void initialize_particle_attribute_builders(CollectContext &context)
     /* TODO: Use uint32_t, but we don't have a corresponding custom property type. */
     attributes_builder.add<int>("Hash", 0);
     attributes_builder.add<float>("Birth Time", 0.0f);
+    attributes_builder.add<float>("Size", 0.03f);
     context.influences.particle_attributes_builder.add_new(name, &attributes_builder);
   }
 }