Include collide_with_areas in ray-casting.rst (godotengine#7449)

Co-authored-by: Raul Santos <[email protected]>

Author: angadjosan

tutorials/physics/ray-casting.rst

@@ -151,7 +151,24 @@ data:
        metadata: Variant() # metadata of collider
     }
 
-The data is similar in 3D space, using Vector3 coordinates.
+The data is similar in 3D space, using Vector3 coordinates. Note that to enable collisions
+with Area3D, the boolean parameter ``collide_with_areas`` must be set to ``true``.
+
+.. tabs::
+ .. code-tab:: gdscript GDScript
+        const RAY_LENGTH = 1000
+        
+        func _physics_process(delta):
+            var space_state = get_world_3d().direct_space_state
+            var cam = $Camera3D
+            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)
 
 Collision exceptions
 --------------------
@@ -278,6 +295,5 @@ To obtain it using a camera, the following code can be used:
         }
     }
 
-
 Remember that during ``_input()``, the space may be locked, so in practice
 this query should be run in ``_physics_process()``.