DOOM II

robot.js

var MAX_SPEED = 100;
//FightCode can only understand your robot
//if its class is called Robot
var Robot = function(robot) {
  this.pivot = {x:robot.arenaWidth/2, y:robot.arenaHeight/2, d:0};
  this.dir = 1;
  this.speed = MAX_SPEED*.8;
};

Robot.prototype.onIdle = function(ev) {
    var robot = ev.robot;
    robot.rotateCannon(180);
  	this.doMove(ev);
  	/*
  	if (Math.random()>0.5) {
  		robot.ahead(50);
  	}
  	else {
    	robot.back(50);
  	}
    */
};

Robot.prototype.strafe = function(ev) {
    var robot = ev.robot;
  	var dx = this.pivot.x - robot.position.x;
  	var dy = this.pivot.y - robot.position.y;
  	var d = this.pivot.d = Math.sqrt(dx*dx+dy*dy);
  	var ang = (Math.atan2(dy, dx) / Math.PI) * 180;
  	var dang = closestAngle(ang,robot.angle);
  	robot.turn(dang);
  	this.doMove(ev);  
  	robot.rotateCannon(-dang);
  	//robot.rotateCannon(closestAngle(ang, robot.cannonAbsoluteAngle));
};
function closestAngle(a, b) {
  	if (Math.abs(b-a) < 180) {
      return b-a;
  	}
  	if (b>a) {
      	return b-a-360;
  	}
  	return b-a+360;
};
Robot.prototype.doMove = function(ev) {
  	var robot = ev.robot;
  	this.speed += (this.speed - (MAX_SPEED/2))/8;
  	var dist = this.speed * this.dir;
  	if (dist > 0) {
  		robot.ahead(dist);
    } else {
      robot.back(-dist);
    }
};
Robot.prototype.closeIn = function(ev) {
  	this.pivot.x = ev.scannedRobot.position.x;
  	this.pivot.y = ev.scannedRobot.position.y;		  
};
Robot.prototype.onScannedRobot = function(ev) {
    var robot = ev.robot;
  	robot.stop();
    robot.fire();
  	this.closeIn(ev);
		this.strafe(ev);
};

Robot.prototype.onHitByBullet = function(ev) {
    var robot = ev.robot;
  	this.dir *= -1;
  	this.speed = MAX_SPEED;
  	if (robot.gunCoolDownTime) {
      this.doMove(ev);
  	}
  	if (robot.life < 80) {
      robot.clone();
  	}
};

Robot.prototype.onWallCollision = function(ev) {
  	this.dir *= -1;
  	this.doMove(ev);
};