ShapeCast2D

Inherits: Node2D < CanvasItem < Node < Object

A 2D shape that sweeps a region of space to detect CollisionObject2Ds.

Description

Shape casting allows to detect collision objects by sweeping its shape along the cast direction determined by target_position. This is similar to RayCast2D, but it allows for sweeping a region of space, rather than just a straight line. ShapeCast2D can detect multiple collision objects. It is useful for things like wide laser beams or snapping a simple shape to a floor.

Immediate collision overlaps can be done with the target_position set to Vector2(0, 0) and by calling force_shapecast_update within the same physics frame. This helps to overcome some limitations of Area2D when used as an instantaneous detection area, as collision information isn't immediately available to it.

Note: Shape casting is more computationally expensive than ray casting.

Properties

bool	collide_with_areas	false
bool	collide_with_bodies	true
int	collision_mask	1
Array	collision_result	[]
bool	enabled	true
bool	exclude_parent	true
float	margin	0.0
int	max_results	32
Shape2D	shape
Vector2	target_position	Vector2(0, 50)

Methods

void	add_exception(node: CollisionObject2D)
void	add_exception_rid(rid: RID)
void	clear_exceptions()
void	force_shapecast_update()
float	get_closest_collision_safe_fraction() const
float	get_closest_collision_unsafe_fraction() const
Object	get_collider(index: int) const
RID	get_collider_rid(index: int) const
int	get_collider_shape(index: int) const
int	get_collision_count() const
bool	get_collision_mask_value(layer_number: int) const
Vector2	get_collision_normal(index: int) const
Vector2	get_collision_point(index: int) const
bool	is_colliding() const
void	remove_exception(node: CollisionObject2D)
void	remove_exception_rid(rid: RID)
void	set_collision_mask_value(layer_number: int, value: bool)

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Property Descriptions

bool collide_with_areas = false 🔗

• void set_collide_with_areas(value: bool)

• bool is_collide_with_areas_enabled()

If true, collisions with Area2Ds will be reported.

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bool collide_with_bodies = true 🔗

• void set_collide_with_bodies(value: bool)

• bool is_collide_with_bodies_enabled()

If true, collisions with PhysicsBody2Ds will be reported.

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int collision_mask = 1 🔗

• void set_collision_mask(value: int)

• int get_collision_mask()

The shape's collision mask. Only objects in at least one collision layer enabled in the mask will be detected.

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Array collision_result = [] 🔗

Returns the complete collision information from the collision sweep. The data returned is the same as in the PhysicsDirectSpaceState2D.get_rest_info method.

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bool enabled = true 🔗

• void set_enabled(value: bool)

• bool is_enabled()

If true, collisions will be reported.

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bool exclude_parent = true 🔗

• void set_exclude_parent_body(value: bool)

• bool get_exclude_parent_body()

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

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float margin = 0.0 🔗

• void set_margin(value: float)

• float get_margin()

The collision margin for the shape. A larger margin helps detecting collisions more consistently, at the cost of precision.

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int max_results = 32 🔗

• void set_max_results(value: int)

• int get_max_results()

The number of intersections can be limited with this parameter, to reduce the processing time.

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Shape2D shape 🔗

• void set_shape(value: Shape2D)

• Shape2D get_shape()

The Shape2D-derived shape to be used for collision queries.

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Vector2 target_position = Vector2(0, 50) 🔗

• void set_target_position(value: Vector2)

• Vector2 get_target_position()

The shape's destination point, relative to this node's position.

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Method Descriptions

void add_exception(node: CollisionObject2D) 🔗

Adds a collision exception so the shape does not report collisions with the specified CollisionObject2D node.

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void add_exception_rid(rid: RID) 🔗

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

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void clear_exceptions() 🔗

Removes all collision exceptions for this shape.

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void force_shapecast_update() 🔗

Updates the collision information for the shape immediately, without waiting for the next _physics_process call. Use this method, for example, when the shape or its parent has changed state.

Note: enabled == true is not required for this to work.

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float get_closest_collision_safe_fraction() const 🔗

The fraction from the ShapeCast2D's origin to its target_position (between 0 and 1) of how far the shape can move without triggering a collision.

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float get_closest_collision_unsafe_fraction() const 🔗

The fraction from the ShapeCast2D's origin to its target_position (between 0 and 1) of how far the shape must move to trigger a collision.

In ideal conditions this would be the same as get_closest_collision_safe_fraction, however shape casting is calculated in discrete steps, so the precise point of collision can occur between two calculated positions.

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Object get_collider(index: int) const 🔗

Returns the collided Object of one of the multiple collisions at index, or null if no object is intersecting the shape (i.e. is_colliding returns false).

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RID get_collider_rid(index: int) const 🔗

Returns the RID of the collided object of one of the multiple collisions at index.

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int get_collider_shape(index: int) const 🔗

Returns the shape ID of the colliding shape of one of the multiple collisions at index, or 0 if no object is intersecting the shape (i.e. is_colliding returns false).

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int get_collision_count() const 🔗

The number of collisions detected at the point of impact. Use this to iterate over multiple collisions as provided by get_collider, get_collider_shape, get_collision_point, and get_collision_normal methods.

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bool get_collision_mask_value(layer_number: int) const 🔗

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

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Vector2 get_collision_normal(index: int) const 🔗

Returns the normal of one of the multiple collisions at index of the intersecting object.

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Vector2 get_collision_point(index: int) const 🔗

Returns the collision point of one of the multiple collisions at index where the shape intersects the colliding object.

Note: this point is in the global coordinate system.

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bool is_colliding() const 🔗

Returns whether any object is intersecting with the shape's vector (considering the vector length).

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void remove_exception(node: CollisionObject2D) 🔗

Removes a collision exception so the shape does report collisions with the specified CollisionObject2D node.

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void remove_exception_rid(rid: RID) 🔗

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

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void set_collision_mask_value(layer_number: int, value: bool) 🔗

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