Convert 3.x transform animation tracks

Author: nikitalita

editor/import/3d/resource_importer_scene.cpp

@@ -3528,11 +3528,43 @@ void EditorSceneFormatImporterESCN::get_extensions(List<String> *r_extensions) c
 	r_extensions->push_back("escn");
 }
 
+int get_text_format_version(String p_path) {
+	Error error;
+	Ref<FileAccess> f = FileAccess::open(p_path, FileAccess::READ, &error);
+	ERR_FAIL_COND_V_MSG(error != OK || f.is_null(), -1, "Cannot open file '" + p_path + "'.");
+	String line = f->get_line().strip_edges();
+	// skip empty lines and comments
+	while (line.is_empty() || line.begins_with(";")) {
+		line = f->get_line().strip_edges();
+		if (f->eof_reached()) {
+			break;
+		}
+	}
+	int format_index = line.find("format");
+	ERR_FAIL_COND_V_MSG(format_index == -1, -1, "No format specifier in file '" + p_path + "'.");
+	String format_str = line.substr(format_index).get_slicec('=', 1).strip_edges();
+	ERR_FAIL_COND_V_MSG(!format_str.substr(0, 1).is_numeric(), -1, "Invalid format in file '" + p_path + "'.");
+	int format = format_str.to_int();
+	return format;
+}
+
 Node *EditorSceneFormatImporterESCN::import_scene(const String &p_path, uint32_t p_flags, const HashMap<StringName, Variant> &p_options, List<String> *r_missing_deps, Error *r_err) {
 	Error error;
+	int format = get_text_format_version(p_path);
+	ERR_FAIL_COND_V(format == -1, nullptr);
 	Ref<PackedScene> ps = ResourceFormatLoaderText::singleton->load(p_path, p_path, &error);
 	ERR_FAIL_COND_V_MSG(ps.is_null(), nullptr, "Cannot load scene as text resource from path '" + p_path + "'.");
 	Node *scene = ps->instantiate();
+	ERR_FAIL_COND_V(!scene, nullptr);
+	if (format == 2) {
+		TypedArray<Node> skel_nodes = scene->find_children("*", "AnimationPlayer");
+		for (int32_t node_i = 0; node_i < skel_nodes.size(); node_i++) {
+			// Force re-compute animation tracks.
+			AnimationPlayer *player = cast_to<AnimationPlayer>(skel_nodes[node_i]);
+			ERR_CONTINUE(!player);
+			player->advance(0);
+		}
+	}
 	TypedArray<Node> nodes = scene->find_children("*", "MeshInstance3D");
 	for (int32_t node_i = 0; node_i < nodes.size(); node_i++) {
 		MeshInstance3D *mesh_3d = cast_to<MeshInstance3D>(nodes[node_i]);
@@ -3541,9 +3573,22 @@ Node *EditorSceneFormatImporterESCN::import_scene(const String &p_path, uint32_t
 		// Ignore the aabb, it will be recomputed.
 		ImporterMeshInstance3D *importer_mesh_3d = memnew(ImporterMeshInstance3D);
 		importer_mesh_3d->set_name(mesh_3d->get_name());
-		importer_mesh_3d->set_transform(mesh_3d->get_relative_transform(mesh_3d->get_parent()));
-		importer_mesh_3d->set_skin(mesh_3d->get_skin());
+		Node *parent = mesh_3d->get_parent();
+		Transform3D rel_transform = mesh_3d->get_relative_transform(parent);
+		if (rel_transform == Transform3D() && parent && parent != mesh_3d) {
+			// If we're here, we probably got a "data.parent is null" error
+			// Node3D.data.parent hasn't been set yet but Node.data.parent has, so we need to get the transform manually
+			Node3D *parent_3d = mesh_3d->get_parent_node_3d();
+			if (parent == parent_3d) {
+				rel_transform = mesh_3d->get_transform();
+			} else if (parent_3d) {
+				rel_transform = parent_3d->get_relative_transform(parent) * mesh_3d->get_transform();
+			} // Otherwise, parent isn't a Node3D.
+		}
+		importer_mesh_3d->set_transform(rel_transform);
+		Ref<Skin> skin = mesh_3d->get_skin();
 		importer_mesh_3d->set_skeleton_path(mesh_3d->get_skeleton_path());
+		importer_mesh_3d->set_skin(skin);
 		Ref<ArrayMesh> array_mesh_3d_mesh = mesh_3d->get_mesh();
 		if (array_mesh_3d_mesh.is_valid()) {
 			// For the MeshInstance3D nodes, we need to convert the ArrayMesh to an ImporterMesh specially.
@@ -3584,7 +3629,5 @@ Node *EditorSceneFormatImporterESCN::import_scene(const String &p_path, uint32_t
 		}
 	}
 
-	ERR_FAIL_NULL_V(scene, nullptr);
-
 	return scene;
 }

scene/animation/animation_mixer.cpp

@@ -257,6 +257,101 @@ TypedArray<StringName> AnimationMixer::_get_animation_library_list() const {
 	return ret;
 }
 
+#if !defined(_3D_DISABLED) && !defined(DISABLE_DEPRECATED)
+bool AnimationMixer::_recalc_animation(const Ref<Animation> &p_anim) {
+	HashMap<int, Vector<real_t>> new_track_values_map;
+	Node *parent = get_node_or_null(root_node);
+	if (!parent) {
+		return false;
+	}
+
+	for (int i = 0; i < p_anim->get_track_count(); i++) {
+		int track_type = p_anim->track_get_type(i);
+		if (!p_anim->track_is_relative_to_rest(i)) {
+			continue;
+		}
+		if (track_type == Animation::TYPE_POSITION_3D || track_type == Animation::TYPE_ROTATION_3D || track_type == Animation::TYPE_SCALE_3D) {
+			NodePath path = p_anim->track_get_path(i);
+			Node *node = parent->get_node(path);
+			ERR_FAIL_NULL_V(node, false);
+			Skeleton3D *skel = Object::cast_to<Skeleton3D>(node);
+			if (!skel) { // transforming non-skeleton node, not relative to rest
+				continue;
+			}
+			StringName bone = path.get_subname(0);
+			int bone_idx = skel->find_bone(bone);
+			if (bone_idx == -1) {
+				continue;
+			}
+			Transform3D rest = skel->get_bone_rest(bone_idx);
+			new_track_values_map[i] = Vector<real_t>();
+			const int32_t POSITION_TRACK_SIZE = 5;
+			const int32_t ROTATION_TRACK_SIZE = 6;
+			const int32_t SCALE_TRACK_SIZE = 5;
+			int32_t track_size = POSITION_TRACK_SIZE;
+			if (track_type == Animation::TYPE_ROTATION_3D) {
+				track_size = ROTATION_TRACK_SIZE;
+			}
+			new_track_values_map[i].resize(track_size * p_anim->track_get_key_count(i));
+			real_t *r = new_track_values_map[i].ptrw();
+			for (int j = 0; j < p_anim->track_get_key_count(i); j++) {
+				real_t time = p_anim->track_get_key_time(i, j);
+				real_t transition = p_anim->track_get_key_transition(i, j);
+				if (track_type == Animation::TYPE_POSITION_3D) {
+					Vector3 a_pos = p_anim->track_get_key_value(i, j);
+					Transform3D t;
+					t.set_origin(a_pos);
+					Vector3 new_a_pos = (rest * t).origin;
+
+					real_t *ofs = &r[j * POSITION_TRACK_SIZE];
+					ofs[0] = time;
+					ofs[1] = transition;
+					ofs[2] = new_a_pos.x;
+					ofs[3] = new_a_pos.y;
+					ofs[4] = new_a_pos.z;
+				} else if (track_type == Animation::TYPE_ROTATION_3D) {
+					Quaternion q = p_anim->track_get_key_value(i, j);
+					Transform3D t;
+					t.basis.rotate(q);
+					Quaternion new_q = (rest * t).basis.get_rotation_quaternion();
+					real_t *ofs = &r[j * ROTATION_TRACK_SIZE];
+					ofs[0] = time;
+					ofs[1] = transition;
+					ofs[2] = new_q.x;
+					ofs[3] = new_q.y;
+					ofs[4] = new_q.z;
+					ofs[5] = new_q.w;
+				} else if (track_type == Animation::TYPE_SCALE_3D) {
+					Vector3 v = p_anim->track_get_key_value(i, j);
+					Transform3D t;
+					t.scale(v);
+					Vector3 new_v = (rest * t).basis.get_scale();
+
+					real_t *ofs = &r[j * SCALE_TRACK_SIZE];
+					ofs[0] = time;
+					ofs[1] = transition;
+					ofs[2] = new_v.x;
+					ofs[3] = new_v.y;
+					ofs[4] = new_v.z;
+				}
+			}
+		}
+	}
+	if (new_track_values_map.is_empty()) {
+		return false;
+	}
+	for (int i = 0; i < p_anim->get_track_count(); i++) {
+		if (!new_track_values_map.has(i)) {
+			continue;
+		}
+		p_anim->set("tracks/" + itos(i) + "/keys", new_track_values_map[i]);
+		p_anim->set("tracks/" + itos(i) + "/relative_to_rest", false);
+	}
+	p_anim->emit_changed();
+	return true;
+}
+#endif // !defined(_3D_DISABLED) || !defined(DISABLE_DEPRECATED)
+
 void AnimationMixer::get_animation_library_list(LocalVector<StringName> *p_libraries) const {
 	for (const AnimationLibraryData &lib : animation_libraries) {
 		p_libraries->push_back(lib.name);
@@ -691,6 +786,11 @@ bool AnimationMixer::_update_caches() {
 	}
 	for (const StringName &E : sname_list) {
 		const Ref<Animation> &anim = get_animation(E);
+#if !defined(_3D_DISABLED) && !defined(DISABLE_DEPRECATED)
+		if (anim->has_tracks_relative_to_rest()) {
+			_recalc_animation(anim);
+		}
+#endif
 		for (int i = 0; i < anim->get_track_count(); i++) {
 			if (!anim->track_is_enabled(i)) {
 				continue;

scene/animation/animation_mixer.h

@@ -317,6 +317,10 @@ class AnimationMixer : public Node {
 	bool _update_caches();
 	void _create_track_num_to_track_cache_for_animation(const Ref<Animation> &p_animation);
 
+#if !defined(_3D_DISABLED) && !defined(DISABLE_DEPRECATED)
+	bool _recalc_animation(const Ref<Animation> &p_anim);
+#endif
+
 	/* ---- Audio ---- */
 	AudioServer::PlaybackType playback_type;