virtualx-engine/doc/classes/CanvasLayer.xml
Rémi Verschelde 81064cc239
Doctool: Remove version attribute from XML header
We don't use that info for anything, and it generates unnecessary diffs
every time we bump the minor version (and CI failures if we forget to
sync some files from opt-in modules (mono, text_server_fb).
2023-07-06 10:08:21 +02:00

81 lines
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XML

<?xml version="1.0" encoding="UTF-8" ?>
<class name="CanvasLayer" inherits="Node" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../class.xsd">
<brief_description>
A node used for independent rendering of objects within a 2D scene.
</brief_description>
<description>
[CanvasItem]-derived nodes that are direct or indirect children of a [CanvasLayer] will be drawn in that layer. The layer is a numeric index that defines the draw order. The default 2D scene renders with index [code]0[/code], so a [CanvasLayer] with index [code]-1[/code] will be drawn below, and a [CanvasLayer] with index [code]1[/code] will be drawn above. This order will hold regardless of the [member CanvasItem.z_index] of the nodes within each layer.
[CanvasLayer]s can be hidden and they can also optionally follow the viewport. This makes them useful for HUDs like health bar overlays (on layers [code]1[/code] and higher) or backgrounds (on layers [code]-1[/code] and lower).
[b]Note:[/b] Embedded [Window]s are placed on layer [code]1024[/code]. [CanvasItem]s on layers [code]1025[/code] and higher appear in front of embedded windows.
[b]Note:[/b] Each [CanvasLayer] is drawn on one specific [Viewport] and cannot be shared between multiple [Viewport]s, see [member custom_viewport]. When using multiple [Viewport]s, for example in a split-screen game, you need create an individual [CanvasLayer] for each [Viewport] you want it to be drawn on.
</description>
<tutorials>
<link title="Viewport and canvas transforms">$DOCS_URL/tutorials/2d/2d_transforms.html</link>
<link title="Canvas layers">$DOCS_URL/tutorials/2d/canvas_layers.html</link>
<link title="2D Dodge The Creeps Demo">https://godotengine.org/asset-library/asset/515</link>
</tutorials>
<methods>
<method name="get_canvas" qualifiers="const">
<return type="RID" />
<description>
Returns the RID of the canvas used by this layer.
</description>
</method>
<method name="get_final_transform" qualifiers="const">
<return type="Transform2D" />
<description>
Returns the transform from the [CanvasLayer]s coordinate system to the [Viewport]s coordinate system.
</description>
</method>
<method name="hide">
<return type="void" />
<description>
Hides any [CanvasItem] under this [CanvasLayer]. This is equivalent to setting [member visible] to [code]false[/code].
</description>
</method>
<method name="show">
<return type="void" />
<description>
Shows any [CanvasItem] under this [CanvasLayer]. This is equivalent to setting [member visible] to [code]true[/code].
</description>
</method>
</methods>
<members>
<member name="custom_viewport" type="Node" setter="set_custom_viewport" getter="get_custom_viewport">
The custom [Viewport] node assigned to the [CanvasLayer]. If [code]null[/code], uses the default viewport instead.
</member>
<member name="follow_viewport_enabled" type="bool" setter="set_follow_viewport" getter="is_following_viewport" default="false">
If enabled, the [CanvasLayer] will use the viewport's transform, so it will move when camera moves instead of being anchored in a fixed position on the screen.
Together with [member follow_viewport_scale] it can be used for a pseudo 3D effect.
</member>
<member name="follow_viewport_scale" type="float" setter="set_follow_viewport_scale" getter="get_follow_viewport_scale" default="1.0">
Scales the layer when using [member follow_viewport_enabled]. Layers moving into the foreground should have increasing scales, while layers moving into the background should have decreasing scales.
</member>
<member name="layer" type="int" setter="set_layer" getter="get_layer" default="1">
Layer index for draw order. Lower values are drawn behind higher values.
</member>
<member name="offset" type="Vector2" setter="set_offset" getter="get_offset" default="Vector2(0, 0)">
The layer's base offset.
</member>
<member name="rotation" type="float" setter="set_rotation" getter="get_rotation" default="0.0">
The layer's rotation in radians.
</member>
<member name="scale" type="Vector2" setter="set_scale" getter="get_scale" default="Vector2(1, 1)">
The layer's scale.
</member>
<member name="transform" type="Transform2D" setter="set_transform" getter="get_transform" default="Transform2D(1, 0, 0, 1, 0, 0)">
The layer's transform.
</member>
<member name="visible" type="bool" setter="set_visible" getter="is_visible" default="true">
If [code]false[/code], any [CanvasItem] under this [CanvasLayer] will be hidden.
Unlike [member CanvasItem.visible], visibility of a [CanvasLayer] isn't propagated to underlying layers.
</member>
</members>
<signals>
<signal name="visibility_changed">
<description>
Emitted when visibility of the layer is changed. See [member visible].
</description>
</signal>
</signals>
</class>