[Bf-blender-cvs] [4563849c1b3] blender2.8: Fixes for particle system and physics

[Sergey Sharybin]

Commit: 4563849c1b3ca6eb7418ea2870f35a624ec04f81
Author: Sergey Sharybin
Date:   Wed Dec 19 15:36:09 2018 +0100
Branches: blender2.8
https://developer.blender.org/rB4563849c1b3ca6eb7418ea2870f35a624ec04f81

Fixes for particle system and physics

- Silence harmless error print about relation.

  Object with particle system which doesn't use physics will
  not have point cache component.

- Tag relations for update when particle system physics type
  change.

  This ensures correct state of point cache component.

This is all part of T59258.

===================================================================

M	source/blender/depsgraph/intern/builder/deg_builder_relations.cc
M	source/blender/editors/object/object_relations.c
M	source/blender/makesrna/intern/rna_particle.c

===================================================================

diff --git a/source/blender/depsgraph/intern/builder/deg_builder_relations.cc b/source/blender/depsgraph/intern/builder/deg_builder_relations.cc
index 23328721e2c..c8822df28e6 100644
--- a/source/blender/depsgraph/intern/builder/deg_builder_relations.cc
+++ b/source/blender/depsgraph/intern/builder/deg_builder_relations.cc
@@ -1714,8 +1714,10 @@ void DepsgraphRelationBuilder::build_particle_systems(Object *object)
 	                           DEG_NODE_TYPE_PARTICLE_SYSTEM,
 	                           DEG_OPCODE_PARTICLE_SYSTEM_DONE);
 	ComponentKey eval_key(&object->id, DEG_NODE_TYPE_PARTICLE_SYSTEM);
-	ComponentKey point_cache_key(&object->id, DEG_NODE_TYPE_POINT_CACHE);
-	add_relation(eval_key, point_cache_key, "Particle Point Cache");
+	if (BKE_ptcache_object_has(scene_, object, 0)) {
+		ComponentKey point_cache_key(&object->id, DEG_NODE_TYPE_POINT_CACHE);
+		add_relation(eval_key, point_cache_key, "Particle Point Cache");
+	}
 	/* Particle systems. */
 	LISTBASE_FOREACH (ParticleSystem *, psys, &object->particlesystem) {
 		ParticleSettings *part = psys->part;
diff --git a/source/blender/editors/object/object_relations.c b/source/blender/editors/object/object_relations.c
index d61c5334ee6..867b807c908 100644
--- a/source/blender/editors/object/object_relations.c
+++ b/source/blender/editors/object/object_relations.c
@@ -1872,6 +1872,9 @@ static void single_mat_users(Main *bmain, Scene *scene, ViewLayer *view_layer, V
 					if (ma->id.us > 1) {
 						man = BKE_material_copy(bmain, ma);
 						BKE_animdata_copy_id_action(bmain, &man->id, false);
+						if (man->nodetree != NULL) {
+							BKE_animdata_copy_id_action(bmain, &man->nodetree->id, false);
+						}
 
 						man->id.us = 0;
 						assign_material(bmain, ob, man, a, BKE_MAT_ASSIGN_USERPREF);
diff --git a/source/blender/makesrna/intern/rna_particle.c b/source/blender/makesrna/intern/rna_particle.c
index bc6c6917ed3..1eb96860c3e 100644
--- a/source/blender/makesrna/intern/rna_particle.c
+++ b/source/blender/makesrna/intern/rna_particle.c
@@ -670,6 +670,8 @@ static void rna_Particle_change_physics_type(Main *bmain, Scene *scene, PointerR
 		part->fluid = MEM_callocN(sizeof(SPHFluidSettings), "SPH Fluid Settings");
 		BKE_particlesettings_fluid_default_settings(part);
 	}
+
+	DEG_relations_tag_update(bmain);
 }
 
 static void rna_Particle_redo_child(Main *bmain, Scene *scene, PointerRNA *ptr)