3D Physics and Other Stuff

-=-=-=-=-=-=-=-=-=-=-=-=-=

-New Vehicle (Based on Bullet's RaycastVehicle) - Vehiclebody/VehicleWheel. Demo will come soon, old vehicle (CarBody) will go away soon too.
-A lot of fixes to the 3D physics engine
-Added KinematicBody with demo
-Fixed the space query API for 2D (demo will come soon). 3D is WIP.
-Fixed long-standing bug with body_enter/body_exit for Area and Area2D
-Performance variables now includes physics (active bodies, collision pairs and islands)
-Ability to see what's inside of instanced scenes!
-Fixed Blend Shapes (no bs+skeleton yet)
-Added an Android JavaClassWrapper singleton for using Android native classes directly from GDScript. This is very Alpha!

tools/editor/scene_tree_dock.cpp

@@ -108,6 +108,9 @@ void SceneTreeDock::_tool_selected(int p_tool, bool p_confirm_override) {
 
 		case TOOL_NEW: {
 
+
+			if (!_validate_no_foreign())
+				break;
 			create_dialog->popup_centered_ratio();
 		} break;
 		case TOOL_INSTANCE: {
@@ -124,6 +127,9 @@ void SceneTreeDock::_tool_selected(int p_tool, bool p_confirm_override) {
 				break;
 			}
 
+			if (!_validate_no_foreign())
+				break;
+
 			file->set_mode(FileDialog::MODE_OPEN_FILE);
 			List<String> extensions;
 			ResourceLoader::get_recognized_extensions_for_type("PackedScene",&extensions);
@@ -147,6 +153,8 @@ void SceneTreeDock::_tool_selected(int p_tool, bool p_confirm_override) {
 			if (!current)
 				break;
 
+			if (!_validate_no_foreign())
+				break;
 			connect_dialog->popup_centered_ratio();
 			connect_dialog->set_node(current);
 
@@ -156,6 +164,8 @@ void SceneTreeDock::_tool_selected(int p_tool, bool p_confirm_override) {
 			Node *current = scene_tree->get_selected();
 			if (!current)
 				break;
+			if (!_validate_no_foreign())
+				break;
 			groups_editor->set_current(current);
 			groups_editor->popup_centered_ratio();
 		} break;
@@ -165,6 +175,9 @@ void SceneTreeDock::_tool_selected(int p_tool, bool p_confirm_override) {
 			if (!selected)
 				break;
 
+			if (!_validate_no_foreign())
+				break;
+
 			Ref<Script> existing = selected->get_script();
 			if (existing.is_valid())
 				editor->push_item(existing.ptr());
@@ -183,6 +196,7 @@ void SceneTreeDock::_tool_selected(int p_tool, bool p_confirm_override) {
 			if (!scene_tree->get_selected())
 				break;
 
+
 			if (scene_tree->get_selected()==edited_scene) {
 
 
@@ -195,6 +209,9 @@ void SceneTreeDock::_tool_selected(int p_tool, bool p_confirm_override) {
 			}
 
 
+			if (!_validate_no_foreign())
+				break;
+
 			Node * node=scene_tree->get_selected();
 			ERR_FAIL_COND(!node->get_parent());
 			int current_pos = node->get_index();
@@ -214,6 +231,7 @@ void SceneTreeDock::_tool_selected(int p_tool, bool p_confirm_override) {
 			if (!edited_scene)
 				break;
 
+
 			if (editor_selection->is_selected(edited_scene)) {
 
 
@@ -225,6 +243,9 @@ void SceneTreeDock::_tool_selected(int p_tool, bool p_confirm_override) {
 				break;
 			}
 
+			if (!_validate_no_foreign())
+				break;
+
 			List<Node*> selection = editor_selection->get_selected_node_list();
 
 			List<Node*> reselect;
@@ -313,6 +334,7 @@ void SceneTreeDock::_tool_selected(int p_tool, bool p_confirm_override) {
 			if (!scene_tree->get_selected())
 				break;
 
+
 			if (editor_selection->is_selected(edited_scene)) {
 
 
@@ -324,6 +346,9 @@ void SceneTreeDock::_tool_selected(int p_tool, bool p_confirm_override) {
 				break;
 			}
 
+			if (!_validate_no_foreign())
+				break;
+
 			List<Node*> nodes = editor_selection->get_selected_node_list();
 			Set<Node*> nodeset;
 			for(List<Node*>::Element *E=nodes.front();E;E=E->next()) {
@@ -341,6 +366,9 @@ void SceneTreeDock::_tool_selected(int p_tool, bool p_confirm_override) {
 			if (remove_list.empty())
 				return;
 
+			if (!_validate_no_foreign())
+				break;
+
 			if (p_confirm_override) {
 				_delete_confirm();
 
@@ -707,6 +735,25 @@ void SceneTreeDock::_node_prerenamed(Node* p_node, const String& p_new_name) {
 
 }
 
+bool SceneTreeDock::_validate_no_foreign() {
+
+	List<Node*> selection = editor_selection->get_selected_node_list();
+
+	for (List<Node*>::Element *E=selection.front();E;E=E->next()) {
+
+		if (E->get()!=edited_scene && E->get()->get_owner()!=edited_scene) {
+
+			accept->get_ok()->set_text("Makes Sense!");
+			accept->set_text("Can't operate on nodes from a foreign scene!");
+			accept->popup_centered(Size2(300,70));;
+			return false;
+
+		}
+	}
+
+	return true;
+}
+
 void SceneTreeDock::_node_reparent(NodePath p_path,bool p_node_only) {
 
 
@@ -894,7 +941,7 @@ void SceneTreeDock::_delete_confirm() {
 void SceneTreeDock::_update_tool_buttons() {
 
 	Node *sel = scene_tree->get_selected();
-	bool disable = !sel;
+	bool disable = !sel || (sel!=edited_scene && sel->get_owner()!=edited_scene);
 	bool disable_root = disable || sel->get_parent()==scene_root;
 
 	tool_buttons[TOOL_INSTANCE]->set_disabled(disable);