NecroBadger

robot.js

// helpers

function areEnemies(robot, sighted) {
  var sightedIsChild  = (robot.id == sighted.parentId);
  var sightedIsParent = (robot.parentId == sighted.id);

  return !(sightedIsChild || sightedIsParent);
};

function baseStep(robot) {
  return 9 * direction(robot);
}; 

function charge(robot) {
  robot.ahead(180);
};

function direction(robot) {
  return isParent(robot) ? 1 : -1;
};

function fallback(robot) {
  robot.ignore('onHitByBullet');
  robot.back(180);
  robot.listen('onHitByBullet');
};   

function isParent(robot) {
  return robot.parentId ? true : false;
};

function random(max) {
  return parseInt(Math.random() * max);
};

function seek(robot) {
  var step = baseStep(robot);

  robot.rotateCannon(step);
  robot.turn(step);
  robot.ahead(3 * step);
};

function shootRandomly(robot, max) {
  var adj = random(max * 2) - max;

  robot.fire();
  robot.rotateCannon(adj);
  robot.fire();

  return adj;
};

// robot

var Robot = function(robot) {
  robot.clone();
};

Robot.prototype.onIdle = function(ev) {
   seek(ev.robot);
};

Robot.prototype.onScannedRobot = function(ev) {
   var robot   = ev.robot;
   var scanned = ev.scannedRobot;

  if (areEnemies(robot, scanned)) {
    var adj = -36 * direction(robot);

    for (i = 1; i < 3; i++)
      shootRandomly(robot, 9 * i);

    robot.rotateCannon(adj);
  }
};

Robot.prototype.onWallCollision = function(ev) {
  fallback(ev.robot);
};

Robot.prototype.onHitByBullet = function(ev) {
  charge(ev.robot);
};

Robot.prototype.onRobotCollision = function(ev) {
  fallback(ev.robot);
};