The setAlpha method

Syntax:setAlpha(number alpha) Returns:nil

Sets the opacity of the sprite.

Parameters

Type	Name	Description
number	alpha	A number in the range [0, 255], where 0 is completely transparent and 255 the original opacity

Remarks

If alpha is greater than 0, the sprite will be made visible.

Calling this function will skip any fade transition currently taking place for this sprite.

Calling show or hide will restore the alpha value to 255.

Examples

-- Create a Sprite object
ball = Sprite.new("ball.png", 1)

-- Set the alpha to 100
ball:setAlpha(100)

See also

• The show method
• The hide method