Depsgraph: Fix some errors printed to the console

They were not real issues, it's just some areas of code tried to create
relations between non-existing nodes without checking whether such
relations are really needed.

Now it should be easier to see real bugs printed.

Hopefully should be no regressions here.

3 files changed, 6 insertions, 8 deletions

diff --git a/source/blender/depsgraph/intern/builder/deg_builder_relations.cc b/source/blender/depsgraph/intern/builder/deg_builder_relations.cc
index 09c7d9ab9de..47672d206de 100644
--- a/source/blender/depsgraph/intern/builder/deg_builder_relations.cc
+++ b/source/blender/depsgraph/intern/builder/deg_builder_relations.cc
@@ -500,7 +500,7 @@ void DepsgraphRelationBuilder::build_object(Main *bmain, Scene *scene, Object *o
 	build_animdata(&ob->id);
 
 	// XXX: This should be hooked up by the build_animdata code
-	if (ob->adt && (ob->adt->action || ob->adt->nla_tracks.first)) {
+	if (needs_animdata_node(&ob->id)) {
 		ComponentKey adt_key(&ob->id, DEPSNODE_TYPE_ANIMATION);
 		add_relation(adt_key, local_transform_key, DEPSREL_TYPE_OPERATION, "Object Animation");
 	}
@@ -1527,7 +1527,7 @@ void DepsgraphRelationBuilder::build_rig(Scene *scene, Object *ob)
 	                          "Armature Eval");
 	add_relation(armature_key, init_key, DEPSREL_TYPE_COMPONENT_ORDER, "Data dependency");
 
-	if (ob->adt && (ob->adt->action || ob->adt->nla_tracks.first)) {
+	if (needs_animdata_node(&ob->id)) {
 		ComponentKey animation_key(&ob->id, DEPSNODE_TYPE_ANIMATION);
 		add_relation(animation_key, init_key, DEPSREL_TYPE_OPERATION, "Rig Animation");
 	}
@@ -1765,7 +1765,7 @@ void DepsgraphRelationBuilder::build_obdata_geom(Main *bmain, Scene *scene, Obje
 				 * for either the modifier needing time, or that it is animated.
 				 */
 				/* XXX: Remove this hack when these links are added as part of build_animdata() instead */
-				if (modifier_dependsOnTime(md) == false) {
+				if (modifier_dependsOnTime(md) == false && needs_animdata_node(&ob->id)) {
 					ComponentKey animation_key(&ob->id, DEPSNODE_TYPE_ANIMATION);
 					add_relation(animation_key, mod_key, DEPSREL_TYPE_OPERATION, "Modifier Animation");
 				}
@@ -2063,7 +2063,7 @@ bool DepsgraphRelationBuilder::needs_animdata_node(ID *id)
 {
 	AnimData *adt = BKE_animdata_from_id(id);
 	if (adt != NULL) {
-		return adt->action != NULL;
+		return (adt->action != NULL) || (adt->nla_tracks.first != NULL);
 	}
 	return false;
 }
diff --git a/source/blender/depsgraph/intern/builder/deg_builder_relations.h b/source/blender/depsgraph/intern/builder/deg_builder_relations.h
index 5240aa24b54..d60499e9cbe 100644
--- a/source/blender/depsgraph/intern/builder/deg_builder_relations.h
+++ b/source/blender/depsgraph/intern/builder/deg_builder_relations.h
@@ -318,6 +318,7 @@ void DepsgraphRelationBuilder::add_relation(const KeyFrom &key_from,
 	else {
 		if (!op_from) {
 			/* XXX TODO handle as error or report if needed */
+			node_from = find_node(key_from);
 			fprintf(stderr, "add_relation(%d, %s) - Could not find op_from (%s)\n",
 			        type, description, key_from.identifier().c_str());
 		}
diff --git a/source/blender/modifiers/intern/MOD_hook.c b/source/blender/modifiers/intern/MOD_hook.c
index 83c4ca7984c..9186b10d8ca 100644
--- a/source/blender/modifiers/intern/MOD_hook.c
+++ b/source/blender/modifiers/intern/MOD_hook.c
@@ -145,12 +145,9 @@ static void updateDepsgraph(ModifierData *md,
 	HookModifierData *hmd = (HookModifierData *)md;
 	if (hmd->object != NULL) {
 		if (hmd->subtarget[0]) {
-			DEG_add_bone_relation(node, hmd->object, hmd->subtarget, DEG_OB_COMP_TRANSFORM, "Hook Modifier");
 			DEG_add_bone_relation(node, hmd->object, hmd->subtarget, DEG_OB_COMP_BONE, "Hook Modifier");
 		}
-		else {
-			DEG_add_object_relation(node, hmd->object, DEG_OB_COMP_TRANSFORM, "Hook Modifier");
-		}
+		DEG_add_object_relation(node, hmd->object, DEG_OB_COMP_TRANSFORM, "Hook Modifier");
 	}
 	/* We need own transformation as well. */
 	DEG_add_object_relation(node, ob, DEG_OB_COMP_TRANSFORM, "Hook Modifier");