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RayCast3D

Inherits: Node3D < Node < Object

A ray in 3D space, used to find the first CollisionObject3D it intersects.

Description

A raycast represents a ray from its origin to its target_position that finds the closest CollisionObject3D along its path, if it intersects any. This is useful for a lot of things, such as

RayCast3D can ignore some objects by adding them to an exception list, by making its detection reporting ignore Area3Ds (collide_with_areas) or PhysicsBody3Ds (collide_with_bodies), or by configuring physics layers.

RayCast3D calculates intersection every physics frame, and it holds the result until the next physics frame. For an immediate raycast, or if you want to configure a RayCast3D multiple times within the same physics frame, use force_raycast_update.

To sweep over a region of 3D space, you can approximate the region with multiple RayCast3Ds or use ShapeCast3D.

Tutorials

• Ray-casting

• 3D Voxel Demo

Properties

Methods

Property Descriptions

bool collide_with_areas = false

• void set_collide_with_areas ( bool value )

• bool is_collide_with_areas_enabled ( )

If true, collision with Area3Ds will be reported.

bool collide_with_bodies = true

• void set_collide_with_bodies ( bool value )

• bool is_collide_with_bodies_enabled ( )

If true, collision with PhysicsBody3Ds will be reported.

int collision_mask = 1

• void set_collision_mask ( int value )

• int get_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.

Color debug_shape_custom_color = Color(0, 0, 0, 1)

• void set_debug_shape_custom_color ( Color value )

• Color get_debug_shape_custom_color ( )

The custom color to use to draw the shape in the editor and at run-time if Visible Collision Shapes is enabled in the Debug menu. This color will be highlighted at run-time if the RayCast3D is colliding with something.

If set to Color(0.0, 0.0, 0.0) (by default), the color set in ProjectSettings.debug/shapes/collision/shape_color is used.

int debug_shape_thickness = 2

• void set_debug_shape_thickness ( int value )

• int get_debug_shape_thickness ( )

If set to 1, a line is used as the debug shape. Otherwise, a truncated pyramid is drawn to represent the RayCast3D. Requires Visible Collision Shapes to be enabled in the Debug menu for the debug shape to be visible at run-time.

bool enabled = true

• void set_enabled ( bool value )

• bool is_enabled ( )

If true, collisions will be reported.

bool exclude_parent = true

• void set_exclude_parent_body ( bool value )

• bool get_exclude_parent_body ( )

If true, collisions will be ignored for this RayCast3D’s immediate parent.

bool hit_from_inside = false

• void set_hit_from_inside ( bool value )

• bool is_hit_from_inside_enabled ( )

If true, the ray will detect a hit when starting inside shapes. In this case the collision normal will be Vector3(0, 0, 0). Does not affect shapes with no volume like concave polygon or heightmap.

Vector3 target_position = Vector3(0, -1, 0)

• void set_target_position ( Vector3 value )

• Vector3 get_target_position ( )

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

Method Descriptions

void add_exception ( CollisionObject3D node )

Adds a collision exception so the ray does not report collisions with the specified CollisionObject3D node.

void add_exception_rid ( RID rid )

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

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 does not need to be true for this to work.

Object get_collider ( ) const

Returns the first object that the ray intersects, or null if no object is intersecting the ray (i.e. is_colliding returns false).

RID get_collider_rid ( ) const

Returns the RID of the first object that the ray intersects, or an empty RID if no object is intersecting the ray (i.e. is_colliding returns false).

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. is_colliding returns false).

bool get_collision_mask_value ( int layer_number ) const

Returns whether or not the specified layer of the collision_mask is enabled, given a layer_number between 1 and 32.

Vector3 get_collision_normal ( ) const

Returns the normal of the intersecting object’s shape at the collision point, or Vector3(0, 0, 0) if the ray starts inside the shape and hit_from_inside is true.

Vector3 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 ( CollisionObject3D node )

Removes a collision exception so the ray does report collisions with the specified CollisionObject3D node.

void remove_exception_rid ( RID rid )

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

void set_collision_mask_value ( int layer_number, bool value )

Based on value, enables or disables the specified layer in the collision_mask, given a layer_number between 1 and 32.