Fix T46411: Experimental deps graph causes particles to jump around

1 files changed, 20 insertions, 0 deletions

diff --git a/source/blender/depsgraph/intern/depsgraph_build_relations.cc b/source/blender/depsgraph/intern/depsgraph_build_relations.cc
index b0eed963aba..7e98eef4740 100644
--- a/source/blender/depsgraph/intern/depsgraph_build_relations.cc
+++ b/source/blender/depsgraph/intern/depsgraph_build_relations.cc
@@ -1122,8 +1122,28 @@ void DepsgraphRelationBuilder::build_particles(Scene *scene, Object *ob)
 				}
 			}
 		}
+
+		if (part->ren_as == PART_DRAW_OB && part->dup_ob) {
+			ComponentKey dup_ob_key(&part->dup_ob->id, DEPSNODE_TYPE_TRANSFORM);
+			add_relation(dup_ob_key,
+			             psys_key,
+			             DEPSREL_TYPE_TRANSFORM,
+			             "Particle Object Visualization");
+		}
 	}
 
+	/* Particle depends on the object transform, so that channel is to be ready
+	 * first.
+	 *
+	 * TODO(sergey): This relation should be altered once real granular update
+	 * is implemented.
+	 */
+	ComponentKey transform_key(&ob->id, DEPSNODE_TYPE_TRANSFORM);
+	add_relation(transform_key,
+	             obdata_ubereval_key,
+	             DEPSREL_TYPE_GEOMETRY_EVAL,
+	             "Partcile Eval");
+
 	/* pointcache */
 	// TODO...
 }