Base class of anything 2D. Canvas items are laid out in a tree; children inherit and extend their parent's transform. [CanvasItem] is extended by [Control] for anything GUI-related, and by [Node2D] for anything related to the 2D engine.
Any [CanvasItem] can draw. For this, [method queue_redraw] is called by the engine, then [constant NOTIFICATION_DRAW] will be received on idle time to request 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 [code]draw_*[/code] functions). However, they can only be used inside [method _draw], its corresponding [method Object._notification] or methods connected to the [signal 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 also be hidden, which will also hide its children. It provides many ways to change parameters such as modulation (for itself and its children) and self modulation (only for itself), as well as its blend mode.
[b]Note:[/b] Unless otherwise specified, all methods that have angle parameters must have angles specified as [i]radians[/i]. To convert degrees to radians, use [method @GlobalScope.deg_to_rad].
Subsequent drawing commands will be ignored unless they fall within the specified animation slice. This is a faster way to implement animations that loop on background rather than redrawing constantly.
Draws an unfilled arc between the given angles with a uniform [param color] and [param width] and optional antialiasing (supported only for positive [param width]). The larger the value of [param point_count], the smoother the curve. See also [method draw_circle].
If [param width] is negative, then the arc is drawn using [constant RenderingServer.PRIMITIVE_LINE_STRIP]. This means that when the CanvasItem is scaled, the arc will remain thin. If this behavior is not desired, then pass a positive [param width] like [code]1.0[/code].
The arc is drawn from [param start_angle] towards the value of [param end_angle] so in clockwise direction if [code]start_angle < end_angle[/code] and counter-clockwise otherwise. Passing the same angles but in reversed order will produce the same arc. If absolute difference of [param start_angle] and [param end_angle] is greater than [constant @GDScript.TAU] radians, then a full circle arc is drawn (i.e. arc will not overlap itself).
Draws a colored polygon of any number of points, convex or concave. Unlike [method draw_polygon], a single color must be specified for the whole polygon.
If [param width] is negative, then a two-point primitives will be drawn instead of a four-point ones. This means that when the CanvasItem is scaled, the line parts will remain thin. If this behavior is not desired, then pass a positive [param width] like [code]1.0[/code].
After submitting all animations slices via [method draw_animation_slice], this function can be used to revert drawing to its default state (all subsequent drawing commands will be visible). If you don't care about this particular use case, usage of this function after submitting the slices is not required.
Draws a line from a 2D point to another, with a given color and width. It can be optionally antialiased. See also [method draw_multiline] and [method draw_polyline].
If [param width] is negative, then a two-point primitive will be drawn instead of a four-point one. This means that when the CanvasItem is scaled, the line will remain thin. If this behavior is not desired, then pass a positive [param width] like [code]1.0[/code].
Draws a textured rectangle region of the multi-channel signed distance field texture at a given position, optionally modulated by a color. See [member FontFile.multichannel_signed_distance_field] for more information and caveats about MSDF font rendering.
Draws multiple disconnected lines with a uniform [param color]. When drawing large amounts of lines, this is faster than using individual [method draw_line] calls. To draw interconnected lines, use [method draw_polyline] instead.
If [param width] is negative, then two-point primitives will be drawn instead of a four-point ones. This means that when the CanvasItem is scaled, the lines will remain thin. If this behavior is not desired, then pass a positive [param width] like [code]1.0[/code].
Draws multiple disconnected lines with a uniform [param width] and segment-by-segment coloring. Colors assigned to line segments match by index between [param points] and [param colors]. When drawing large amounts of lines, this is faster than using individual [method draw_line] calls. To draw interconnected lines, use [method draw_polyline_colors] instead.
If [param width] is negative, then two-point primitives will be drawn instead of a four-point ones. This means that when the CanvasItem is scaled, the lines will remain thin. If this behavior is not desired, then pass a positive [param width] like [code]1.0[/code].
Breaks [param text] into lines and draws it using the specified [param font] at the [param pos] (top-left corner). The text will have its color multiplied by [param modulate]. If [param width] is greater than or equal to 0, the text will be clipped if it exceeds the specified width.
Breaks [param text] to the lines and draws text outline using the specified [param font] at the [param pos] (top-left corner). The text will have its color multiplied by [param modulate]. If [param width] is greater than or equal to 0, the text will be clipped if it exceeds the specified width.
Draws a solid polygon of any number of points, convex or concave. Unlike [method draw_colored_polygon], each point's color can be changed individually. See also [method draw_polyline] and [method draw_polyline_colors].
Draws interconnected line segments with a uniform [param color] and [param width] and optional antialiasing (supported only for positive [param width]). When drawing large amounts of lines, this is faster than using individual [method draw_line] calls. To draw disconnected lines, use [method draw_multiline] instead. See also [method draw_polygon].
If [param width] is negative, the polyline is drawn using [constant RenderingServer.PRIMITIVE_LINE_STRIP]. This means that when the CanvasItem is scaled, the polyline will remain thin. If this behavior is not desired, then pass a positive [param width] like [code]1.0[/code].
Draws interconnected line segments with a uniform [param width] and segment-by-segment coloring, and optional antialiasing (supported only for positive [param width]). Colors assigned to line segments match by index between [param points] and [param colors]. When drawing large amounts of lines, this is faster than using individual [method draw_line] calls. To draw disconnected lines, use [method draw_multiline_colors] instead. See also [method draw_polygon].
If [param width] is negative, then the polyline is drawn using [constant RenderingServer.PRIMITIVE_LINE_STRIP]. This means that when the CanvasItem is scaled, the polyline will remain thin. If this behavior is not desired, then pass a positive [param width] like [code]1.0[/code].
Draws a custom primitive. 1 point for a point, 2 points for a line, 3 points for a triangle, and 4 points for a quad. If 0 points or more than 4 points are specified, nothing will be drawn and an error message will be printed. See also [method draw_line], [method draw_polyline], [method draw_polygon], and [method draw_rect].
Draws a rectangle. If [param filled] is [code]true[/code], the rectangle will be filled with the [param color] specified. If [param filled] is [code]false[/code], the rectangle will be drawn as a stroke with the [param color] and [param width] specified.
If [param width] is negative, then two-point primitives will be drawn instead of a four-point ones. This means that when the CanvasItem is scaled, the lines will remain thin. If this behavior is not desired, then pass a positive [param width] like [code]1.0[/code].
[b]Note:[/b] Unfilled rectangles drawn with a negative [param width] may not display perfectly. For example, corners may be missing or brighter due to overlapping lines (for a translucent [param color]).
[b]Note:[/b] [member FontFile.oversampling] does [i]not[/i] take [param scale] into account. This means that scaling up/down will cause bitmap fonts and rasterized (non-MSDF) dynamic fonts to appear blurry or pixelated. To ensure text remains crisp regardless of scale, you can enable MSDF font rendering by enabling [member ProjectSettings.gui/theme/default_font_multichannel_signed_distance_field] (applies to the default project font only), or enabling [b]Multichannel Signed Distance Field[/b] in the import options of a DynamicFont for custom fonts. On system fonts, [member SystemFont.multichannel_signed_distance_field] can be enabled in the inspector.
Draws [param text] using the specified [param font] at the [param pos] (bottom-left corner using the baseline of the font). The text will have its color multiplied by [param modulate]. If [param width] is greater than or equal to 0, the text will be clipped if it exceeds the specified width.
Draws [param text] outline using the specified [param font] at the [param pos] (bottom-left corner using the baseline of the font). The text will have its color multiplied by [param modulate]. If [param width] is greater than or equal to 0, the text will be clipped if it exceeds the specified width.
Draws a textured rectangle at a given position, optionally modulated by a color. If [param transpose] is [code]true[/code], the texture will have its X and Y coordinates swapped.
Draws a textured rectangle region at a given position, optionally modulated by a color. If [param transpose] is [code]true[/code], the texture will have its X and Y coordinates swapped.
Forces the transform to update. Transform changes in physics are not instant for performance reasons. Transforms are accumulated and then set. Use this if you need an up-to-date transform when doing physics operations.
Returns the global transform matrix of this item, i.e. the combined transform up to the topmost [CanvasItem] node. The topmost item is a [CanvasItem] that either has no parent, has non-[CanvasItem] parent or it has [member top_level] enabled.
Returns [code]true[/code] if the node is present in the [SceneTree], its [member visible] property is [code]true[/code] and all its antecedents are also visible. If any antecedent is hidden, this node will not be visible in the scene tree, and is consequently not drawn (see [method _draw]).
Queues the [CanvasItem] to redraw. During idle time, if [CanvasItem] is visible, [constant NOTIFICATION_DRAW] is sent and [method _draw] is called. This only occurs [b]once[/b] per frame, even if this method has been called multiple times.
Show the [CanvasItem] if it's currently hidden. This is equivalent to setting [member visible] to [code]true[/code]. For controls that inherit [Popup], the correct way to make them visible is to call one of the multiple [code]popup*()[/code] functions instead.
If [code]true[/code], this [CanvasItem] will [i]not[/i] inherit its transform from parent [CanvasItem]s. Its draw order will also be changed to make it draw on top of other [CanvasItem]s that do not have [member top_level] set to [code]true[/code]. The [CanvasItem] will effectively act as if it was placed as a child of a bare [Node].
The rendering layer in which this [CanvasItem] is rendered by [Viewport] nodes. A [Viewport] will render a [CanvasItem] if it and all its parents share a layer with the [Viewport]'s canvas cull mask.
If [code]true[/code], this [CanvasItem] is drawn. The node is only visible if all of its antecedents are visible as well (in other words, [method is_visible_in_tree] must return [code]true[/code]).
[b]Note:[/b] For controls that inherit [Popup], the correct way to make them visible is to call one of the multiple [code]popup*()[/code] functions instead.
If [code]true[/code], child nodes with the lowest Y position are drawn before those with a higher Y position. If [code]false[/code], Y-sorting is disabled. Y-sorting only affects children that inherit from [CanvasItem].
You can nest nodes with Y-sorting. Child Y-sorted nodes are sorted in the same space as the parent Y-sort. This feature allows you to organize a scene better or divide it into multiple ones without changing your scene tree.
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.
Z index. Controls the order in which the nodes render. A node with a higher Z index will display in front of others. Must be between [constant RenderingServer.CANVAS_ITEM_Z_MIN] and [constant RenderingServer.CANVAS_ITEM_Z_MAX] (inclusive).
[b]Note:[/b] Changing the Z index of a [Control] only affects the drawing order, not the order in which input events are handled. This can be useful to implement certain UI animations, e.g. a menu where hovered items are scaled and should overlap others.
Emitted when the [CanvasItem] must redraw, [i]after[/i] the related [constant NOTIFICATION_DRAW] notification, and [i]before[/i] [method _draw] is called.
[b]Note:[/b] Deferred connections do not allow drawing through the [code]draw_*[/code] methods.
Emitted when the item's [Rect2] boundaries (position or size) have changed, or when an action is taking place that may have impacted these boundaries (e.g. changing [member Sprite2D.texture]).
The texture filter blends between the nearest 4 pixels and between the nearest 2 mipmaps. Use this for non-pixel art textures that may be viewed at a low scale (e.g. due to [Camera2D] zoom), as mipmaps are important to smooth out pixels that are smaller than on-screen pixels.
The texture filter reads from the nearest pixel, but selects a mipmap based on the angle between the surface and the camera view. This reduces artifacts on surfaces that are almost in line with the camera. The anisotropic filtering level can be changed by adjusting [member ProjectSettings.rendering/textures/default_filters/anisotropic_filtering_level].
The texture filter blends between the nearest 4 pixels and selects a mipmap based on the angle between the surface and the camera view. This reduces artifacts on surfaces that are almost in line with the camera. This is the slowest of the filtering options, but results in the highest quality texturing. The anisotropic filtering level can be changed by adjusting [member ProjectSettings.rendering/textures/default_filters/anisotropic_filtering_level].
