LightsOut programming: level 4

[atodorov]

• when play mode starts it will initialize a predefined number of LEDs = X
• X == 5 - level number, in this case X == 5 - 4 == 1
• leds that light up should be chosen randomly from the entire matrix. If easier think about them as X random out of 16!
• In play mode each button press controls groups of buttons using inversion (like in the original LO):
  • if lighted up => go dark
  • if dark => light up
• Each level uses a different geometric shape to define the group which is controlled via single button press:
  • For level 4 this is a + shape where the pressed button is in the center, see LightsOut sources: general logic #5 for image
• Some board configurations will not lead to a successful solution if you are trying to play the classical LO game. This is fine; no checking for this.
• For the corner buttons the following implementation(s) are acceptable:
  • either consider that you have phantom rows/columns on all sides (to make the algorithm straight forward and not do any error checks) or
  • if easier check if the resulting (horizontal, vertical) address represents an invalid location (e.g. no such physical LED + button) and skip it.

For more info see #5