A RayCast represents a line from its origin to its destination position, [member target_position]. It is used to query the 3D space in order to find the closest object along the path of the ray.
RayCast3D can ignore some objects by adding them to the exception list via [method add_exception] or by setting proper filtering with collision layers and masks.
RayCast3D calculates intersection every physics frame (see [Node]), and the result is cached so it can be used later until the next frame. If multiple queries are required between physics frames (or during the same frame), use [method force_raycast_update] after adjusting the raycast.
Updates the collision information for the ray. Use this method to update the collision information immediately instead of waiting for the next [code]_physics_process[/code] call, for example if the ray or its parent has changed state.
Returns the first object that the ray intersects, or [code]null[/code] if no object is intersecting the ray (i.e. [method is_colliding] returns [code]false[/code]).
Returns the shape ID of the first object that the ray intersects, or [code]0[/code] if no object is intersecting the ray (i.e. [method is_colliding] returns [code]false[/code]).
Returns the normal of the intersecting object's shape at the collision point, or [code]Vector3(0, 0, 0)[/code] if the ray starts inside the shape and [member hit_from_inside] is [code]true[/code].
Based on [code]value[/code], enables or disables the specified layer in the [member collision_mask], given a [code]layer_number[/code] between 1 and 32.
The ray's collision mask. Only objects in at least one collision layer enabled in the mask will be detected. See [url=$DOCS_URL/tutorials/physics/physics_introduction.html#collision-layers-and-masks]Collision layers and masks[/url] in the documentation for more information.
The custom color to use to draw the shape in the editor and at run-time if [b]Visible Collision Shapes[/b] is enabled in the [b]Debug[/b] menu. This color will be highlighted at run-time if the [RayCast3D] is colliding with something.
If set to [code]Color(0.0, 0.0, 0.0)[/code] (by default), the color set in [member ProjectSettings.debug/shapes/collision/shape_color] is used.
If set to [code]1[/code], a line is used as the debug shape. Otherwise, a truncated pyramid is drawn to represent the [RayCast3D]. Requires [b]Visible Collision Shapes[/b] to be enabled in the [b]Debug[/b] menu for the debug shape to be visible at run-time.
If [code]true[/code], the ray will detect a hit when starting inside shapes. In this case the collision normal will be [code]Vector3(0, 0, 0)[/code]. Does not affect shapes with no volume like concave polygon or heightmap.
