Struct gdnative::api::PathFollow2D

pub struct PathFollow2D { /* fields omitted */ }

core class PathFollow2D inherits Node2D (unsafe).

Official documentation

See the documentation of this class in the Godot engine's official documentation.

Memory management

Non reference counted objects such as the ones of this type are usually owned by the engine.

PathFollow2D is a reference-only type. Persistent references can only exist in the unsafe Ref<PathFollow2D> form.

In the cases where Rust code owns an object of this type, for example if the object was just created on the Rust side and not passed to the engine yet, ownership should be either given to the engine or the object must be manually destroyed using Ref::free, or Ref::queue_free if it is a Node.

Class hierarchy

PathFollow2D inherits methods from:

• Node2D
• CanvasItem
• Node
• Object

Safety

All types in the Godot API have "interior mutability" in Rust parlance. To enforce that the official thread-safety guidelines are followed, the typestate pattern is used in the Ref and TRef smart pointers, and the Instance API. The typestate Access in these types tracks whether the access is unique, shared, or exclusive to the current thread. For more information, see the type-level documentation on Ref.

Implementations

impl PathFollow2D

pub fn new() -> Ref<PathFollow2D, Unique>

Creates a new instance of this object.

Because this type is not reference counted, the lifetime of the returned object is not automatically managed.

Immediately after creation, the object is owned by the caller, and can be passed to the engine (in which case the engine will be responsible for destroying the object) or destroyed manually using Ref::free, or preferably Ref::queue_free if it is a Node.

pub fn cubic_interpolation(&self) -> bool

If [code]true[/code], the position between two cached points is interpolated cubically, and linearly otherwise.
			The points along the [Curve2D] of the [Path2D] are precomputed before use, for faster calculations. The point at the requested offset is then calculated interpolating between two adjacent cached points. This may present a problem if the curve makes sharp turns, as the cached points may not follow the curve closely enough.
			There are two answers to this problem: either increase the number of cached points and increase memory consumption, or make a cubic interpolation between two points at the cost of (slightly) slower calculations.

pub fn h_offset(&self) -> f64

The node's offset along the curve.

pub fn lookahead(&self) -> f64

How far to look ahead of the curve to calculate the tangent if the node is rotating. E.g. shorter lookaheads will lead to faster rotations.

pub fn offset(&self) -> f64

The distance along the path in pixels.

pub fn unit_offset(&self) -> f64

The distance along the path as a number in the range 0.0 (for the first vertex) to 1.0 (for the last). This is just another way of expressing the offset within the path, as the offset supplied is multiplied internally by the path's length.

pub fn v_offset(&self) -> f64

The node's offset perpendicular to the curve.

pub fn has_loop(&self) -> bool

If [code]true[/code], any offset outside the path's length will wrap around, instead of stopping at the ends. Use it for cyclic paths.

pub fn is_rotating(&self) -> bool

If [code]true[/code], this node rotates to follow the path, making its descendants rotate.

pub fn set_cubic_interpolation(&self, enable: bool)

If [code]true[/code], the position between two cached points is interpolated cubically, and linearly otherwise.
			The points along the [Curve2D] of the [Path2D] are precomputed before use, for faster calculations. The point at the requested offset is then calculated interpolating between two adjacent cached points. This may present a problem if the curve makes sharp turns, as the cached points may not follow the curve closely enough.
			There are two answers to this problem: either increase the number of cached points and increase memory consumption, or make a cubic interpolation between two points at the cost of (slightly) slower calculations.

pub fn set_h_offset(&self, h_offset: f64)

The node's offset along the curve.

pub fn set_lookahead(&self, lookahead: f64)

How far to look ahead of the curve to calculate the tangent if the node is rotating. E.g. shorter lookaheads will lead to faster rotations.

pub fn set_loop(&self, _loop: bool)

If [code]true[/code], any offset outside the path's length will wrap around, instead of stopping at the ends. Use it for cyclic paths.

pub fn set_offset(&self, offset: f64)

The distance along the path in pixels.

pub fn set_rotate(&self, enable: bool)

If [code]true[/code], this node rotates to follow the path, making its descendants rotate.

pub fn set_unit_offset(&self, unit_offset: f64)

The distance along the path as a number in the range 0.0 (for the first vertex) to 1.0 (for the last). This is just another way of expressing the offset within the path, as the offset supplied is multiplied internally by the path's length.

pub fn set_v_offset(&self, v_offset: f64)

The node's offset perpendicular to the curve.

Methods from Deref<Target = Node2D>

pub fn apply_scale(&self, ratio: Vector2D<f32, UnknownUnit>)

Multiplies the current scale by the [code]ratio[/code] vector.

pub fn get_angle_to(&self, point: Vector2D<f32, UnknownUnit>) -> f64

Returns the angle between the node and the [code]point[/code] in radians.

pub fn global_position(&self) -> Vector2D<f32, UnknownUnit>

Global position.

pub fn global_rotation(&self) -> f64

Global rotation in radians.

pub fn global_rotation_degrees(&self) -> f64

Global rotation in degrees.

pub fn global_scale(&self) -> Vector2D<f32, UnknownUnit>

Global scale.

pub fn position(&self) -> Vector2D<f32, UnknownUnit>

Position, relative to the node's parent.

pub fn get_relative_transform_to_parent(
    &self,
    parent: impl AsArg<Node>
) -> Transform2D<f32, UnknownUnit, UnknownUnit>

Returns the [Transform2D] relative to this node's parent.

pub fn rotation(&self) -> f64

Rotation in radians, relative to the node's parent.

pub fn rotation_degrees(&self) -> f64

Rotation in degrees, relative to the node's parent.

pub fn scale(&self) -> Vector2D<f32, UnknownUnit>

The node's scale. Unscaled value: [code](1, 1)[/code].

pub fn z_index(&self) -> i64

Z index. Controls the order in which the nodes render. A node with a higher Z index will display in front of others.

pub fn global_translate(&self, offset: Vector2D<f32, UnknownUnit>)

Adds the [code]offset[/code] vector to the node's global position.

pub fn is_z_relative(&self) -> bool

If [code]true[/code], the node's Z index is relative to its parent's Z index. If this node's Z index is 2 and its parent's effective Z index is 3, then this node's effective Z index will be 2 + 3 = 5.

pub fn look_at(&self, point: Vector2D<f32, UnknownUnit>)

Rotates the node so it points towards the [code]point[/code], which is expected to use global coordinates.

pub fn move_local_x(&self, delta: f64, scaled: bool)

Applies a local translation on the node's X axis based on the [method Node._process]'s [code]delta[/code]. If [code]scaled[/code] is [code]false[/code], normalizes the movement.

Default Arguments

• scaled - false

pub fn move_local_y(&self, delta: f64, scaled: bool)

Applies a local translation on the node's Y axis based on the [method Node._process]'s [code]delta[/code]. If [code]scaled[/code] is [code]false[/code], normalizes the movement.

Default Arguments

• scaled - false

pub fn rotate(&self, radians: f64)

Applies a rotation to the node, in radians, starting from its current rotation.

pub fn set_global_position(&self, position: Vector2D<f32, UnknownUnit>)

Global position.

pub fn set_global_rotation(&self, radians: f64)

Global rotation in radians.

pub fn set_global_rotation_degrees(&self, degrees: f64)

Global rotation in degrees.

pub fn set_global_scale(&self, scale: Vector2D<f32, UnknownUnit>)

Global scale.

pub fn set_global_transform(
    &self,
    xform: Transform2D<f32, UnknownUnit, UnknownUnit>
)

Global [Transform2D].

pub fn set_position(&self, position: Vector2D<f32, UnknownUnit>)

Position, relative to the node's parent.

pub fn set_rotation(&self, radians: f64)

Rotation in radians, relative to the node's parent.

pub fn set_rotation_degrees(&self, degrees: f64)

Rotation in degrees, relative to the node's parent.

pub fn set_scale(&self, scale: Vector2D<f32, UnknownUnit>)

The node's scale. Unscaled value: [code](1, 1)[/code].

pub fn set_transform(&self, xform: Transform2D<f32, UnknownUnit, UnknownUnit>)

Local [Transform2D].

pub fn set_z_as_relative(&self, enable: bool)

If [code]true[/code], the node's Z index is relative to its parent's Z index. If this node's Z index is 2 and its parent's effective Z index is 3, then this node's effective Z index will be 2 + 3 = 5.

pub fn set_z_index(&self, z_index: i64)

Z index. Controls the order in which the nodes render. A node with a higher Z index will display in front of others.

pub fn to_global(
    &self,
    local_point: Vector2D<f32, UnknownUnit>
) -> Vector2D<f32, UnknownUnit>

Transforms the provided local position into a position in global coordinate space. The input is expected to be local relative to the [Node2D] it is called on. e.g. Applying this method to the positions of child nodes will correctly transform their positions into the global coordinate space, but applying it to a node's own position will give an incorrect result, as it will incorporate the node's own transformation into its global position.

pub fn to_local(
    &self,
    global_point: Vector2D<f32, UnknownUnit>
) -> Vector2D<f32, UnknownUnit>

Transforms the provided global position into a position in local coordinate space. The output will be local relative to the [Node2D] it is called on. e.g. It is appropriate for determining the positions of child nodes, but it is not appropriate for determining its own position relative to its parent.

pub fn translate(&self, offset: Vector2D<f32, UnknownUnit>)

Translates the node by the given [code]offset[/code] in local coordinates.

Trait Implementations

impl Debug for PathFollow2D

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Deref for PathFollow2D

type Target = Node2D

The resulting type after dereferencing.

fn deref(&self) -> &Node2D

Dereferences the value.

impl DerefMut for PathFollow2D

fn deref_mut(&mut self) -> &mut Node2D

Mutably dereferences the value.

impl GodotObject for PathFollow2D

type RefKind = ManuallyManaged

The memory management kind of this type. This modifies the behavior of the Ref smart pointer. See its type-level documentation for more information.

fn class_name() -> &'static str

fn null() -> Null<Self>

Creates an explicitly null reference of Self as a method argument. This makes type inference easier for the compiler compared to Option.

fn new() -> Ref<Self, Unique> where
    Self: Instanciable, 

Creates a new instance of Self using a zero-argument constructor, as a Unique reference.

fn cast<T>(&self) -> Option<&T> where
    T: GodotObject + SubClass<Self>, 

Performs a dynamic reference downcast to target type.

fn upcast<T>(&self) -> &T where
    Self: SubClass<T>,
    T: GodotObject, 

Performs a static reference upcast to a supertype that is guaranteed to be valid.

unsafe fn assume_shared(&self) -> Ref<Self, Shared>

Creates a persistent reference to the same Godot object with shared thread access.

unsafe fn assume_thread_local(&self) -> Ref<Self, ThreadLocal> where
    Self: GodotObject<RefKind = RefCounted>, 

Creates a persistent reference to the same Godot object with thread-local thread access.

unsafe fn assume_unique(&self) -> Ref<Self, Unique>

Creates a persistent reference to the same Godot object with unique access.

impl Instanciable for PathFollow2D

fn construct() -> Ref<PathFollow2D, Unique>

impl QueueFree for PathFollow2D

unsafe fn godot_queue_free(obj: *mut c_void)

impl SubClass<CanvasItem> for PathFollow2D

impl SubClass<Node> for PathFollow2D

impl SubClass<Node2D> for PathFollow2D

impl SubClass<Object> for PathFollow2D