Depsgraph: remove features incompatible with new system.

Some features are incompatible with multithreading and reliable evaluation
of dependencies. We are now removing them as part of a bigger cleanup to
fix bugs in keyframing and invalid animation evaluations.

* Dupliframes have been removed. This was a hack added before there were
  more powerful features like the array modifier.
* Slow parent has been removed, never worked in 2.8. It was always
  unreliable for use in production due to depending on whatever frame was
  previously evaluated, which was not always the previous frame.
* Particle instanced objects used to have their transform evaluated at
  the particle time. Now it always gets the current time transform.
* Boids can no longer do predictive avoidance of force field objects,
  but still for other particles.

Differential Revision: https://developer.blender.org/D4274

3 files changed, 0 insertions, 81 deletions

diff --git a/source/blender/editors/object/object_intern.h b/source/blender/editors/object/object_intern.h
index 1ef0b0f268c..3db9b748def 100644
--- a/source/blender/editors/object/object_intern.h
+++ b/source/blender/editors/object/object_intern.h
@@ -65,8 +65,6 @@ void OBJECT_OT_parent_clear(struct wmOperatorType *ot);
 void OBJECT_OT_vertex_parent_set(struct wmOperatorType *ot);
 void OBJECT_OT_track_set(struct wmOperatorType *ot);
 void OBJECT_OT_track_clear(struct wmOperatorType *ot);
-void OBJECT_OT_slow_parent_set(struct wmOperatorType *ot);
-void OBJECT_OT_slow_parent_clear(struct wmOperatorType *ot);
 void OBJECT_OT_make_local(struct wmOperatorType *ot);
 void OBJECT_OT_make_override_static(struct wmOperatorType *ot);
 void OBJECT_OT_make_single_user(struct wmOperatorType *ot);
diff --git a/source/blender/editors/object/object_ops.c b/source/blender/editors/object/object_ops.c
index eb9dd0bbe28..05bb6e06a85 100644
--- a/source/blender/editors/object/object_ops.c
+++ b/source/blender/editors/object/object_ops.c
@@ -87,8 +87,6 @@ void ED_operatortypes_object(void)
 	WM_operatortype_append(OBJECT_OT_vertex_parent_set);
 	WM_operatortype_append(OBJECT_OT_track_set);
 	WM_operatortype_append(OBJECT_OT_track_clear);
-	WM_operatortype_append(OBJECT_OT_slow_parent_set);
-	WM_operatortype_append(OBJECT_OT_slow_parent_clear);
 	WM_operatortype_append(OBJECT_OT_make_local);
 	WM_operatortype_append(OBJECT_OT_make_override_static);
 	WM_operatortype_append(OBJECT_OT_make_single_user);
diff --git a/source/blender/editors/object/object_relations.c b/source/blender/editors/object/object_relations.c
index c3d194e176f..33d698757b8 100644
--- a/source/blender/editors/object/object_relations.c
+++ b/source/blender/editors/object/object_relations.c
@@ -1081,83 +1081,6 @@ void OBJECT_OT_parent_no_inverse_set(wmOperatorType *ot)
 	ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
 }
 
-/************************ Clear Slow Parent Operator *********************/
-
-static int object_slow_parent_clear_exec(bContext *C, wmOperator *UNUSED(op))
-{
-	Depsgraph *depsgraph = CTX_data_depsgraph(C);
-	Scene *scene = CTX_data_scene(C);
-
-	CTX_DATA_BEGIN (C, Object *, ob, selected_editable_objects)
-	{
-		if (ob->parent) {
-			if (ob->partype & PARSLOW) {
-				ob->partype -= PARSLOW;
-				BKE_object_where_is_calc(depsgraph, scene, ob);
-				ob->partype |= PARSLOW;
-				DEG_id_tag_update(&ob->id, ID_RECALC_TRANSFORM);
-			}
-		}
-	}
-	CTX_DATA_END;
-
-	WM_event_add_notifier(C, NC_SCENE, scene);
-
-	return OPERATOR_FINISHED;
-}
-
-void OBJECT_OT_slow_parent_clear(wmOperatorType *ot)
-{
-	/* identifiers */
-	ot->name = "Clear Slow Parent";
-	ot->description = "Clear the object's slow parent";
-	ot->idname = "OBJECT_OT_slow_parent_clear";
-
-	/* api callbacks */
-	ot->invoke = WM_operator_confirm;
-	ot->exec = object_slow_parent_clear_exec;
-	ot->poll = ED_operator_view3d_active;
-
-	/* flags */
-	ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
-}
-
-/********************** Make Slow Parent Operator *********************/
-
-static int object_slow_parent_set_exec(bContext *C, wmOperator *UNUSED(op))
-{
-	Scene *scene = CTX_data_scene(C);
-
-	CTX_DATA_BEGIN (C, Object *, ob, selected_editable_objects)
-	{
-		if (ob->parent)
-			ob->partype |= PARSLOW;
-
-		DEG_id_tag_update(&ob->id, ID_RECALC_TRANSFORM);
-	}
-	CTX_DATA_END;
-
-	WM_event_add_notifier(C, NC_SCENE, scene);
-
-	return OPERATOR_FINISHED;
-}
-
-void OBJECT_OT_slow_parent_set(wmOperatorType *ot)
-{
-	/* identifiers */
-	ot->name = "Set Slow Parent";
-	ot->description = "Set the object's slow parent";
-	ot->idname = "OBJECT_OT_slow_parent_set";
-
-	/* api callbacks */
-	ot->invoke = WM_operator_confirm;
-	ot->exec = object_slow_parent_set_exec;
-	ot->poll = ED_operator_view3d_active;
-
-	/* flags */
-	ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
-}
-
 /* ******************** Clear Track Operator ******************* */
 
 enum {