Method: Processing::GraphicsContext#alpha

Defined in:

lib/processing/graphics_context.rb

#alpha(color) ⇒ Numeric

Returns the red value of the color.

Parameters:

• color (Numeric) —

  color value

Returns:

• (Numeric) —

  the red value

See Also:

• https://processing.org/reference/alpha_.html
• https://p5js.org/reference/p5/alpha/

# File 'lib/processing/graphics_context.rb', line 756

def alpha(color)
  ((color >> 24) & 0xff) / 255.0 * @colorMaxes__[3]
end