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Line2D¶

Inherits: Node2D < CanvasItem < Node < Object

A 2D polyline that can optionally be textured.

描述¶

This node draws a 2D polyline, i.e. a shape consisting of several points connected by segments. Line2D is not a mathematical polyline, i.e. the segments are not infinitely thin. It is intended for rendering and it can be colored and optionally textured.

Warning: Certain configurations may be impossible to draw nicely, such as very sharp angles. In these situations, the node uses fallback drawing logic to look decent.

Note: Line2D is drawn using a 2D mesh.

教程¶

属性¶

bool	antialiased	`false`
LineCapMode	begin_cap_mode	`0`
Color	default_color	`Color(1, 1, 1, 1)`
LineCapMode	end_cap_mode	`0`
Gradient	gradient
LineJointMode	joint_mode	`0`
PackedVector2Array	points	`PackedVector2Array()`
int	round_precision	`8`
float	sharp_limit	`2.0`
Texture2D	texture
LineTextureMode	texture_mode	`0`
float	width	`10.0`
Curve	width_curve

Methods¶

void	add_point ( Vector2 position, int index=-1 )
void	clear_points ( )
int	get_point_count ( ) const
Vector2	get_point_position ( int index ) const
void	remove_point ( int index )
void	set_point_position ( int index, Vector2 position )

Enumerations¶

enum LineJointMode:

LineJointMode LINE_JOINT_SHARP = 0

Makes the polyline's joints pointy, connecting the sides of the two segments by extending them until they intersect. If the rotation of a joint is too big (based on sharp_limit), the joint falls back to LINE_JOINT_BEVEL to prevent very long miters.

LineJointMode LINE_JOINT_BEVEL = 1

Makes the polyline's joints bevelled/chamfered, connecting the sides of the two segments with a simple line.

LineJointMode LINE_JOINT_ROUND = 2

Makes the polyline's joints rounded, connecting the sides of the two segments with an arc. The detail of this arc depends on round_precision.

enum LineCapMode:

LineCapMode LINE_CAP_NONE = 0

Draws no line cap.

LineCapMode LINE_CAP_BOX = 1

Draws the line cap as a box, slightly extending the first/last segment.

LineCapMode LINE_CAP_ROUND = 2

Draws the line cap as a semicircle attached to the first/last segment.

enum LineTextureMode:

LineTextureMode LINE_TEXTURE_NONE = 0

Takes the left pixels of the texture and renders them over the whole polyline.

LineTextureMode LINE_TEXTURE_TILE = 1

Tiles the texture over the polyline. CanvasItem.texture_repeat of the Line2D node must be CanvasItem.TEXTURE_REPEAT_ENABLED or CanvasItem.TEXTURE_REPEAT_MIRROR for it to work properly.

LineTextureMode LINE_TEXTURE_STRETCH = 2

Stretches the texture across the polyline. CanvasItem.texture_repeat of the Line2D node must be CanvasItem.TEXTURE_REPEAT_DISABLED for best results.

Property Descriptions¶

bool antialiased = false

void set_antialiased ( bool value )
bool get_antialiased ( )

If true, the polyline's border will be anti-aliased.

Note: Line2D is not accelerated by batching when being anti-aliased.

LineCapMode begin_cap_mode = 0

void set_begin_cap_mode ( LineCapMode value )
LineCapMode get_begin_cap_mode ( )

The style of the beginning of the polyline. Use LineCapMode constants.

Color default_color = Color(1, 1, 1, 1)

void set_default_color ( Color value )
Color get_default_color ( )

The color of the polyline. Will not be used if a gradient is set.

LineCapMode end_cap_mode = 0

void set_end_cap_mode ( LineCapMode value )
LineCapMode get_end_cap_mode ( )

The style of the end of the polyline. Use LineCapMode constants.

Gradient gradient

void set_gradient ( Gradient value )
Gradient get_gradient ( )

The gradient is drawn through the whole line from start to finish. The default color will not be used if a gradient is set.

LineJointMode joint_mode = 0

void set_joint_mode ( LineJointMode value )
LineJointMode get_joint_mode ( )

The style of the connections between segments of the polyline. Use LineJointMode constants.

PackedVector2Array points = PackedVector2Array()

void set_points ( PackedVector2Array value )
PackedVector2Array get_points ( )

The points of the polyline, interpreted in local 2D coordinates. Segments are drawn between the adjacent points in this array.

int round_precision = 8

void set_round_precision ( int value )
int get_round_precision ( )

The smoothness used for rounded joints and caps. Higher values result in smoother corners, but are more demanding to render and update.

float sharp_limit = 2.0

void set_sharp_limit ( float value )
float get_sharp_limit ( )

Determines the miter limit of the polyline. Normally, when joint_mode is set to LINE_JOINT_SHARP, sharp angles fall back to using the logic of LINE_JOINT_BEVEL joints to prevent very long miters. Higher values of this property mean that the fallback to a bevel joint will happen at sharper angles.

Texture2D texture

void set_texture ( Texture2D value )
Texture2D get_texture ( )

The texture used for the polyline. Uses texture_mode for drawing style.

LineTextureMode texture_mode = 0

void set_texture_mode ( LineTextureMode value )
LineTextureMode get_texture_mode ( )

The style to render the texture of the polyline. Use LineTextureMode constants.

float width = 10.0

void set_width ( float value )
float get_width ( )

The polyline's width

Curve width_curve

void set_curve ( Curve value )
Curve get_curve ( )

The polyline's width curve. The width of the polyline over its length will be equivalent to the value of the width curve over its domain.

Method Descriptions¶

void add_point ( Vector2 position, int index=-1 )

Adds a point with the specified position relative to the polyline's own position. If no index is provided, the new point will be added to the end of the points array.

If index is given, the new point is inserted before the existing point identified by index index. The indices of the points after the new point get increased by 1. The provided index must not exceed the number of existing points in the polyline. See get_point_count.

void clear_points ( )

Removes all points from the polyline, making it empty.

int get_point_count ( ) const

Returns the number of points in the polyline.

Vector2 get_point_position ( int index ) const

Returns the position of the point at index index.

void remove_point ( int index )

Removes the point at index index from the polyline.

void set_point_position ( int index, Vector2 position )

Overwrites the position of the point at the given index with the supplied position.