Added Dart Physics

Scripts/camera_3d.gd

@@ -0,0 +1,15 @@
+extends Camera3D
+
+const RAY_LENGTH = 1000
+
+func ray_cast():
+	var space_state = get_world_3d().direct_space_state
+	var cam = $"."
+	var mousepos = get_viewport().get_mouse_position()
+	var origin = cam.project_ray_origin(mousepos) 
+	var end = origin + cam.project_ray_normal(mousepos) * RAY_LENGTH
+	var query = PhysicsRayQueryParameters3D.create(origin,end)
+	query.collide_with_areas = true
+	var result = space_state.intersect_ray(query)
+	result = result.get("collider")
+	return result