VisibleOnScreenNotifier2D

继承： Node2D < CanvasItem < Node < Object

派生： VisibleOnScreenEnabler2D

A rectangular region of 2D space that detects whether it is visible on screen.

描述

VisibleOnScreenNotifier2D represents a rectangular region of 2D space. When any part of this region becomes visible on screen or in a viewport, it will emit a screen_entered signal, and likewise it will emit a screen_exited signal when no part of it remains visible.

If you want a node to be enabled automatically when this region is visible on screen, use VisibleOnScreenEnabler2D.

Note: VisibleOnScreenNotifier2D uses the render culling code to determine whether it's visible on screen, so it won't function unless CanvasItem.visible is set to true.

属性
Rect2rect

方法
boolis_on_screen ( ) const1

信号

screen_entered ( )

Emitted when the VisibleOnScreenNotifier2D enters the screen.

screen_exited ( )

Emitted when the VisibleOnScreenNotifier2D exits the screen.

属性说明

Rect2 rect = Rect2(-10, -10, 20, 20)

  • void set_rect ( value: Rect2 )
  • Rect2 get_rect ( )

The VisibleOnScreenNotifier2D's bounding rectangle.

方法说明

bool is_on_screen ( ) const1

If true, the bounding rectangle is on the screen.

Note: It takes one frame for the VisibleOnScreenNotifier2D's visibility to be determined once added to the scene tree, so this method will always return false right after it is instantiated, before the draw pass.

2

本方法通常需要用户覆盖才能生效。

1

本方法无副作用，不会修改该实例的任何成员变量。

3

本方法除了能接受在此处描述的参数外，还能够继续接受任意数量的参数。

4

本方法用于构造某个类型。

5

调用本方法无需实例，可直接使用类名进行调用。

6

本方法描述的是使用本类型作为左操作数的有效运算符。

7

这个值是由下列位标志构成位掩码的整数。

8

无返回值。