Method: Processing::GraphicsContext#background

Defined in:

lib/processing/graphics_context.rb

#background(str) ⇒ nil #background(str, alpha) ⇒ nil #background(gray) ⇒ nil #background(gray, alpha) ⇒ nil #background(r, g, b) ⇒ nil #background(r, g, b, alpha) ⇒ nil

Clears screen.

Examples:

background(255)            # White background
background(0)              # Black background
background(255, 0, 0)      # Red background
background(255, 0, 0, 128) # Semi-transparent red background

Parameters:

• str (String) —

  color code like ‘#00AAFF’

• gray (Integer) —

  gray value (0..255)

• r (Integer) —

  red value (0..255)

• g (Integer) —

  green value (0..255)

• b (Integer) —

  blue value (0..255)

• alpha (Integer) —

  alpha value (0..255)

Returns:

• (nil) —

  nil

See Also:

• https://processing.org/reference/background_.html
• https://p5js.org/reference/p5/background/

# File 'lib/processing/graphics_context.rb', line 1466

def background(*args)
  assertDrawing__
  rgba = toRGBA__(*args)
  if rgba[3] == 1
    @painter__.background(*rgba)
  else
    @painter__.push fill: rgba, stroke: :none, blend_mode: :replace do |_|
      @painter__.rect 0, 0, width, height
    end
  end
  nil
end