Zho:视讯设为 ()（积木）

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视讯设为 ()
視訊設為 [開啟 v]
类别	侦测类积木
形狀	条形积木
加入於	2.0

The Turn Video () 积木 is a 侦测类积木 and a 条形积木. It can turn the webcam on, off, or on flipped horizontally, depending on the 参数. Early in the Scratch 2.0 alpha, it was categorized as a 外观类积木.

Caution:

This block can turn on the computer's webcam. If you are uncomfortable with using a webcam for safety, avoid usage of this block or click "Deny" on the Adobe Flash Player warning if one pops up.

Options

The block contains a drop-down list of three options.

• On

— Turns the webcam on for utilization of the motion-sensing features in Scratch 2.0.

• Off

— Turns the webcam off which will cause the constant film pasted onto the 舞台 to remove.

• On-flipped

— Turns the webcam on but displays the video footage in a horizontally flipped form. This option is not available in the stage but only in sprites.

用法示例

• Showing the user what they look like

當 @greenflag 被點擊
視訊設為 [開啟 v]

• Turning the video on, to use the motion

當 @greenflag 被點擊 // in Stage
視訊設為 [開啟 v]

當 @greenflag 被點擊 // in a sprite
重複無限次 
  移動 (視訊 [動作 v] \( [舞台 v] \)) 點
  碰到邊緣就反彈
end

参见

• 视讯透明度设为 () %
• 视讯 () ()
• Watch Me Move! (video sensing)