RayCast2D

Query the closest object intersecting a ray.

A RayCast represents a line from its origin to its destination position, . It is used to query the 2D space in order to find the closest object along the path of the ray.

RayCast2D can ignore some objects by adding them to the exception list via add_exception, by setting proper filtering with collision layers, or by filtering object types with type masks.

RayCast2D can be configured to report collisions with s (collide_with_areas) and/or s (collide_with_bodies).

Only enabled raycasts will be able to query the space and report collisions.

RayCast2D calculates intersection every physics frame (see ), 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 force_raycast_update after adjusting the raycast.

Tutorials

Methods

• Vector2 cast_to

The ray’s destination point, relative to the RayCast’s position.

If true, collision with s will be reported.

• bool collide_with_bodies

• collision_mask

The ray’s collision mask. Only objects in at least one collision layer enabled in the mask will be detected. See Collision layers and masks in the documentation for more information.

• enabled

If , collisions will be reported.

• bool exclude_parent

If true, the parent node will be excluded from collision detection.

Method Descriptions

• void add_exception ( node )

Adds a collision exception so the ray does not report collisions with the specified node.

• void add_exception_rid ( RID rid )

Adds a collision exception so the ray does not report collisions with the specified .

• void clear_exceptions ( )

Removes all collision exceptions for this ray.

• void force_raycast_update ( )

Updates the collision information for the ray. Use this method to update the collision information immediately instead of waiting for the next _physics_process call, for example if the ray or its parent has changed state.

Note: enabled is not required for this to work.

• int get_collider_shape ( ) const

Returns the shape ID of the first object that the ray intersects, or 0 if no object is intersecting the ray (i.e. returns ).

• bool get_collision_mask_bit ( bit ) const

Returns an individual bit on the collision mask.

• Vector2 get_collision_normal ( ) const

Returns the normal of the intersecting object’s shape at the collision point.

• get_collision_point ( ) const

Returns the collision point at which the ray intersects the closest object.

Note: this point is in the global coordinate system.

• bool is_colliding ( ) const

Returns whether any object is intersecting with the ray’s vector (considering the vector length).

• void remove_exception ( node )

Removes a collision exception so the ray does report collisions with the specified node.

• void remove_exception_rid ( RID rid )

Removes a collision exception so the ray does report collisions with the specified .

• void set_collision_mask_bit ( int bit, value )