CanvasItem

Inherits: Node < Object

Inherited By: Control, Node2D

Abstract base class for everything in 2D space.

Description

Abstract base class for everything in 2D space. Canvas items are laid out in a tree; children inherit and extend their parent's transform. CanvasItem is extended by Control for GUI-related nodes, and by Node2D for 2D game objects.

Any CanvasItem can draw. For this, queue_redraw is called by the engine, then NOTIFICATION_DRAW will be received on idle time to request a redraw. Because of this, canvas items don't need to be redrawn on every frame, improving the performance significantly. Several functions for drawing on the CanvasItem are provided (see draw_* functions). However, they can only be used inside _draw, its corresponding Object._notification or methods connected to the draw signal.

Canvas items are drawn in tree order. By default, children are on top of their parents, so a root CanvasItem will be drawn behind everything. This behavior can be changed on a per-item basis.

A CanvasItem can be hidden, which will also hide its children. By adjusting various other properties of a CanvasItem, you can also modulate its color (via modulate or self_modulate), change its Z-index, blend mode, and more.

Tutorials

Properties

ClipChildrenMode

clip_children

0

int

light_mask

1

Material

material

Color

modulate

Color(1, 1, 1, 1)

Color

self_modulate

Color(1, 1, 1, 1)

bool

show_behind_parent

false

TextureFilter

texture_filter

0

TextureRepeat

texture_repeat

0

bool

top_level

false

bool

use_parent_material

false

int

visibility_layer

1

bool

visible

true

bool

y_sort_enabled

false

bool

z_as_relative

true

int

z_index

0

Methods

void

_draw ( ) virtual

void

draw_animation_slice ( float animation_length, float slice_begin, float slice_end, float offset=0.0 )

void

draw_arc ( Vector2 center, float radius, float start_angle, float end_angle, int point_count, Color color, float width=-1.0, bool antialiased=false )

void

draw_char ( Font font, Vector2 pos, String char, int font_size=16, Color modulate=Color(1, 1, 1, 1) ) const

void

draw_char_outline ( Font font, Vector2 pos, String char, int font_size=16, int size=-1, Color modulate=Color(1, 1, 1, 1) ) const

void

draw_circle ( Vector2 position, float radius, Color color )

void

draw_colored_polygon ( PackedVector2Array points, Color color, PackedVector2Array uvs=PackedVector2Array(), Texture2D texture=null )

void

draw_dashed_line ( Vector2 from, Vector2 to, Color color, float width=-1.0, float dash=2.0, bool aligned=true )