PathFollow3D

package
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Published: Sep 20, 2025 License: MIT Imports: 26 Imported by: 0

Documentation

Overview

This node takes its parent Path3D, and returns the coordinates of a point within it, given a distance from the first vertex.

It is useful for making other nodes follow a path, without coding the movement pattern. For that, the nodes must be children of this node. The descendant nodes will then move accordingly when setting the Progress in this node.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func CorrectPosture

func CorrectPosture(transform Transform3D.BasisOrigin, rotation_mode RotationMode) Transform3D.BasisOrigin

Correct the 'transform'. 'rotation_mode' implicitly specifies how posture (forward, up and sideway direction) is calculated.

Types

type Advanced

type Advanced = class

Advanced exposes a 1:1 low-level instance of the class, undocumented, for those who know what they are doing.

type Any

type Any interface {
	gd.IsClass
	AsPathFollow3D() Instance
}

type Extension

type Extension[T gdclass.Interface] struct{ gdclass.Extension[T, Instance] }

Extension can be embedded in a new struct to create an extension of this class. T should be the type that is embedding this Extension

func (*Extension[T]) AsNode

func (self *Extension[T]) AsNode() Node.Instance

func (*Extension[T]) AsNode3D

func (self *Extension[T]) AsNode3D() Node3D.Instance

func (*Extension[T]) AsObject

func (self *Extension[T]) AsObject() [1]gd.Object

func (*Extension[T]) AsPathFollow3D

func (self *Extension[T]) AsPathFollow3D() Instance

type ID

type ID Object.ID

ID is a typed object ID (reference) to an instance of this class, use it to store references to objects with unknown lifetimes, as an ID will not panic on use if the underlying object has been destroyed.

func (ID) Instance

func (id ID) Instance() (Instance, bool)

type Instance

type Instance [1]gdclass.PathFollow3D

Instance of the class with convieniently typed arguments and results.

var Nil Instance

Nil is a nil/null instance of the class. Equivalent to the zero value.

func New

func New() Instance

func (Instance) AsNode

func (self Instance) AsNode() Node.Instance

func (Instance) AsNode3D

func (self Instance) AsNode3D() Node3D.Instance

func (Instance) AsObject

func (self Instance) AsObject() [1]gd.Object

func (Instance) AsPathFollow3D

func (self Instance) AsPathFollow3D() Instance

func (Instance) CubicInterp

func (self Instance) CubicInterp() bool

If true, the position between two cached points is interpolated cubically, and linearly otherwise.

The points along the Curve3D of the Path3D 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.

func (Instance) HOffset

func (self Instance) HOffset() Float.X

The node's offset along the curve.

func (Instance) ID

func (self Instance) ID() ID

func (Instance) Loop

func (self Instance) Loop() bool

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

func (Instance) Progress

func (self Instance) Progress() Float.X

The distance from the first vertex, measured in 3D units along the path. Changing this value sets this node's position to a point within the path.

func (Instance) ProgressRatio

func (self Instance) ProgressRatio() Float.X

The distance from the first vertex, considering 0.0 as the first vertex and 1.0 as the last. This is just another way of expressing the progress within the path, as the progress supplied is multiplied internally by the path's length.

It can be set or get only if the PathFollow3D is the child of a Path3D which is part of the scene tree, and that this Path3D has a Curve3D with a non-zero length. Otherwise, trying to set this field will print an error, and getting this field will return 0.0.

func (Instance) RotationMode

func (self Instance) RotationMode() RotationMode

Allows or forbids rotation on one or more axes, depending on the RotationMode constants being used.

func (Instance) SetCubicInterp

func (self Instance) SetCubicInterp(value bool)

SetCubicInterp sets the property returned by [GetCubicInterpolation].

func (Instance) SetHOffset

func (self Instance) SetHOffset(value Float.X)

SetHOffset sets the property returned by [GetHOffset].

func (Instance) SetLoop

func (self Instance) SetLoop(value bool)

SetLoop sets the property returned by [HasLoop].

func (*Instance) SetObject

func (self *Instance) SetObject(obj [1]gd.Object) bool

func (Instance) SetProgress

func (self Instance) SetProgress(value Float.X)

SetProgress sets the property returned by [GetProgress].

func (Instance) SetProgressRatio

func (self Instance) SetProgressRatio(value Float.X)

SetProgressRatio sets the property returned by [GetProgressRatio].

func (Instance) SetRotationMode

func (self Instance) SetRotationMode(value RotationMode)

SetRotationMode sets the property returned by [GetRotationMode].

func (Instance) SetTiltEnabled

func (self Instance) SetTiltEnabled(value bool)

SetTiltEnabled sets the property returned by [IsTiltEnabled].

func (Instance) SetUseModelFront

func (self Instance) SetUseModelFront(value bool)

SetUseModelFront sets the property returned by [IsUsingModelFront].

func (Instance) SetVOffset

func (self Instance) SetVOffset(value Float.X)

SetVOffset sets the property returned by [GetVOffset].

func (Instance) TiltEnabled

func (self Instance) TiltEnabled() bool

If true, the tilt property of Curve3D takes effect.

func (Instance) UseModelFront

func (self Instance) UseModelFront() bool

If true, the node moves on the travel path with orienting the +Z axis as forward. See also [Vector3.Forward] and [Vector3.ModelFront].

func (Instance) VOffset

func (self Instance) VOffset() Float.X

The node's offset perpendicular to the curve.

func (Instance) Virtual

func (self Instance) Virtual(name string) reflect.Value

type RotationMode

type RotationMode int //gd:PathFollow3D.RotationMode
const (
	// Forbids the PathFollow3D to rotate.
	RotationNone RotationMode = 0
	// Allows the PathFollow3D to rotate in the Y axis only.
	RotationY RotationMode = 1
	// Allows the PathFollow3D to rotate in both the X, and Y axes.
	RotationXy RotationMode = 2
	// Allows the PathFollow3D to rotate in any axis.
	RotationXyz RotationMode = 3
	// Uses the up vector information in a [Curve3D] to enforce orientation. This rotation mode requires the [Path3D]'s [Curve3D.UpVectorEnabled] property to be set to true.
	//
	// [Curve3D]: https://pkg.go.dev/graphics.gd/classdb/Curve3D
	// [Curve3D.UpVectorEnabled]: https://pkg.go.dev/graphics.gd/classdb/Curve3D#Instance.UpVectorEnabled
	// [Path3D]: https://pkg.go.dev/graphics.gd/classdb/Path3D
	RotationOriented RotationMode = 4
)

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