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Curve3D

Inherits: Resource < RefCounted < Object

Describes a Bézier curve in 3D space.

Description

This class describes a Bézier curve in 3D space. It is mainly used to give a shape to a Path3D, but can be manually sampled for other purposes.

It keeps a cache of precalculated points along the curve, to speed up further calculations.

Properties

float

bake_interval

0.2

int

point_count

0

bool

up_vector_enabled

true

Methods

void

add_point ( Vector3 position, Vector3 in=Vector3(0, 0, 0), Vector3 out=Vector3(0, 0, 0), int index=-1 )

void

clear_points ( )

float

get_baked_length ( ) const

PackedVector3Array

get_baked_points ( ) const

PackedFloat32Array

get_baked_tilts ( ) const

PackedVector3Array

get_baked_up_vectors ( ) const

float

get_closest_offset ( Vector3 to_point ) const

Vector3

get_closest_point ( Vector3 to_point ) const

Vector3

get_point_in ( int idx ) const

Vector3

get_point_out ( int idx ) const

Vector3

get_point_position ( int idx ) const

float

get_point_tilt ( int idx ) const

void

remove_point ( int idx )

Vector3

sample ( int idx, float t ) const

Vector3

sample_baked ( float offset=0.0, bool cubic=false ) const

Vector3

sample_baked_up_vector ( float offset, bool apply_tilt=false ) const

Transform3D

sample_baked_with_rotation ( float offset=0.0, bool cubic=false, bool apply_tilt=false ) const

Vector3

samplef ( float fofs ) const

void

set_point_in ( int idx, Vector3 position )

void

set_point_out ( int idx, Vector3 position )

void

set_point_position ( int idx, Vector3 position )

void

set_point_tilt ( int idx, float tilt )

PackedVector3Array

tessellate ( int max_stages=5, float tolerance_degrees=4 ) const

PackedVector3Array

tessellate_even_length ( int max_stages=5, float tolerance_length=0.2 ) const


Property Descriptions

float bake_interval = 0.2

  • void set_bake_interval ( float value )

  • float get_bake_interval ( )

The distance in meters between two adjacent cached points. Changing it forces the cache to be recomputed the next time the get_baked_points or get_baked_length function is called. The smaller the distance, the more points in the cache and the more memory it will consume, so use with care.


int point_count = 0

  • void set_point_count ( int value )

  • int get_point_count ( )

The number of points describing the curve.


bool up_vector_enabled = true

  • void set_up_vector_enabled ( bool value )

  • bool is_up_vector_enabled ( )

If true, the curve will bake up vectors used for orientation. This is used when PathFollow3D.rotation_mode is set to PathFollow3D.ROTATION_ORIENTED. Changing it forces the cache to be recomputed.


Method Descriptions

void add_point ( Vector3 position, Vector3 in=Vector3(0, 0, 0), Vector3 out=Vector3(0, 0, 0), int index=-1 )

Adds a point with the specified position relative to the curve's own position, with control points in and out. Appends the new point at the end of the point list.

If index is given, the new point is inserted before the existing point identified by index index. Every existing point starting from index is shifted further down the list of points. The index must be greater than or equal to 0 and must not exceed the number of existing points in the line. See point_count.


void clear_points ( )

Removes all points from the curve.


float get_baked_length ( ) const

Returns the total length of the curve, based on the cached points. Given enough density (see bake_interval), it should be approximate enough.


PackedVector3Array get_baked_points ( ) const

Returns the cache of points as a PackedVector3Array.


PackedFloat32Array get_baked_tilts ( ) const

Returns the cache of tilts as a PackedFloat32Array.


PackedVector3Array get_baked_up_vectors ( ) const

Returns the cache of up vectors as a PackedVector3Array.

If up_vector_enabled is false, the cache will be empty.


float get_closest_offset ( Vector3 to_point ) const

Returns the closest offset to to_point. This offset is meant to be used in sample_baked or sample_baked_up_vector.

to_point must be in this curve's local space.


Vector3 get_closest_point ( Vector3 to_point ) const

Returns the closest point on baked segments (in curve's local space) to to_point.

to_point must be in this curve's local space.


Vector3 get_point_in ( int idx ) const

Returns the position of the control point leading to the vertex idx. The returned position is relative to the vertex idx. If the index is out of bounds, the function sends an error to the console, and returns (0, 0, 0).


Vector3 get_point_out ( int idx ) const

Returns the position of the control point leading out of the vertex idx. The returned position is relative to the vertex idx. If the index is out of bounds, the function sends an error to the console, and returns (0, 0, 0).


Vector3 get_point_position ( int idx ) const

Returns the position of the vertex idx. If the index is out of bounds, the function sends an error to the console, and returns (0, 0, 0).


float get_point_tilt ( int idx ) const

Returns the tilt angle in radians for the point idx. If the index is out of bounds, the function sends an error to the console, and returns 0.


void remove_point ( int idx )

Deletes the point idx from the curve. Sends an error to the console if idx is out of bounds.


Vector3 sample ( int idx, float t ) const

Returns the position between the vertex idx and the vertex idx +