Implement Particle Trails

-Enable the trails and set the length in seconds
-Provide a mesh with a skeleton and a skin
-Or, alternatively use one of the built-in TubeTrailMesh/RibbonTrailMesh
-Works deterministically
-Fixed particle collisions (were broken)
-Not working in 2D yet (that will happen next)

1 files changed, 3 insertions, 0 deletions

diff --git a/editor/scene_tree_dock.h b/editor/scene_tree_dock.h
index aa62c93cb5..53f31375f8 100644
--- a/editor/scene_tree_dock.h
+++ b/editor/scene_tree_dock.h
@@ -244,6 +244,9 @@ class SceneTreeDock : public VBoxContainer {
 	bool profile_allow_editing;
 	bool profile_allow_script_editing;
 
+	static SceneTreeDock *singleton;
+	static void _update_configuration_warning();
+
 protected:
 	void _notification(int p_what);
 	static void _bind_methods();