//originally compiled with this online compiler: http://hossy.net/sssc.php
//thanks to hossy.net
class BattleTanks {
	var tanks;
	var map;
	var count;
	var max_speed;
	var friction;
	var braking;
	var accel;
	var turnspeed;
	var bounce_factor;
	var tankscale;
	var num_enemies;
	var bullet_speed;
	var damage;
	var explosions;
	var num_particles;
	function BattleTanks(path) {
		//define global variable
		defineGlobals(path);
		//create map
		//		 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 
		map =	 [	[1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1], //1
				[1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1], //2
				[1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1], //3
				[1,0,0,0,0,1,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,1,0,0,0,0,0,1], //4
				[1,0,0,0,0,1,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,1,0,0,0,0,0,1], //5
				[1,0,0,1,1,1,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,1,1,1,0,0,0,1], //6
				[1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1], //7
				[1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1], //8
				[1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1], //9
				[1,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,0,0,0,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,1], //0
				[1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1], //1
				[1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1], //2
				[1,0,0,1,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1,1,0,0,0,1], //3
				[1,0,0,1,1,1,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1,0,0,1,1,1,0,0,0,1], //4
				[1,0,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,1,1,0,0,0,0,1], //5
				[1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1], //6
				[1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1], //7
				[1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1], //8
				[1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1], //9
				[1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1], //0
				[1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,1,1,1,1], //1
				[1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1], //2
				[1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1], //3
				[1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1], //4
				[1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1], //5
				[1,0,0,0,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,1,1,0,0,0,0,1], //6
				[1,0,0,1,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,1,1,1,0,0,0,1], //7
				[1,0,0,1,1,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1,0,0,0,1,1,0,0,0,1], //8
				[1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1], //9
				[1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1], //0
				[1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1], //1
				[1,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,1,1,0,0,0,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,1], //2
				[1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1], //3
				[1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1], //4
				[1,0,0,1,1,1,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,1,1,1,0,0,0,1], //5
				[1,0,0,0,0,1,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,1,0,0,0,0,0,1], //6
				[1,0,0,0,0,1,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,1,0,0,0,0,0,1], //7
				[1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1], //8
				[1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1], //9
				[1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1]];//0
		//draw map
		drawMap(map,path);
		//create tanks
		tanks.push(newTank(path,true,map,3,3,90));
		tanks.push(newTank(path,false,map,37,3,180));
		tanks.push(newTank(path,false,map,37,37,-90));
		tanks.push(newTank(path,false,map,3,37,0));
		/*tanks.push(newTank(path,false,map,14,15,90));
		tanks.push(newTank(path,false,map,24,15,180));
		tanks.push(newTank(path,false,map,24,25,-90));
		tanks.push(newTank(path,false,map,14,25,0));*/
	}
	function elevateTankDepth() {
		for (var i = 0; i<tanks.length; i++) {
			tanks[i].swapDepths(count-(i+1));
		}
	}
	function drawTreads(tank) {
		var tread = tank._parent.createEmptyMovieClip("tread"+(count++),count);
		elevateTankDepth();
		tread.lineStyle(0,0x000000,100);
		tread._alpha = 30;
		tread.moveTo(tank.ortx,tank.orty);
		tread.lineTo(tank.rtx,tank.rty);
		tread.moveTo(tank.oltx,tank.olty);
		tread.lineTo(tank.ltx,tank.lty);
		tread.onEnterFrame = function() {
			this._alpha -= .15;
			if (this._alpha<3) {
				this.removeMovieClip();
			}
		}
		;
	}
	function calculateTreads(tank) {
		tank.ortx = tank.rtx;
		tank.orty = tank.rty;
		tank.oltx = tank.ltx;
		tank.olty = tank.lty;
		var ca = Math.cos((tank._rotation-90)*(Math.PI/180));
		var sa = Math.sin((tank._rotation-90)*(Math.PI/180));
		tank.rtx = ca*(3*tankscale)+tank._x;
		tank.rty = sa*(3*tankscale)+tank._y;
		tank.ltx = ca*(-3*tankscale)+tank._x;
		tank.lty = sa*(-3*tankscale)+tank._y;
		tank.rbx = ca*(5*tankscale)+tank._x;
		tank.rby = sa*(5*tankscale)+tank._y;
		tank.lbx = ca*(-5*tankscale)+tank._x;
		tank.lby = sa*(-5*tankscale)+tank._y;
	}
	function getCorners(x,y,ob) {
		//var bounds = ob.clip.getBounds();
		ob.downY = Math.floor((y+ob.height-1)/10);
		ob.upY = Math.floor((y-ob.height)/10);
		ob.leftX = Math.floor((x-ob.width)/10);
		ob.rightX = Math.floor((x+ob.width-1)/10);
		//check if they are walls
		ob.upleft = (map[ob.upY][ob.leftX] == 0);
		ob.downleft = (map[ob.downY][ob.leftX] == 0);
		ob.upright = (map[ob.upY][ob.rightX] == 0);
		ob.downright = (map[ob.downY][ob.rightX] == 0);
	}
	function drawCircle (seed, x, y, r, c) {
		var rt45 = Math.tan(Math.PI / 8) * r;
		var rs90 = Math.sin(Math.PI / 4) * r;
		seed.lineStyle(3, c);
		seed.moveTo(-r+x, y);
		seed.curveTo (-r + x, -rt45 + y, -rs90 + x, -rs90 + y);
		seed.curveTo (-rt45 + x, -r + y, x, -r + y);
		seed.curveTo (rt45 + x, -r + y, rs90 + x, -rs90 + y);
		seed.curveTo (r + x, -rt45 + y, r + x, y);
		seed.curveTo (r + x, rt45 + y, rs90 + x, rs90 + y);
		seed.curveTo (rt45 + x, r + y, x, r + y);
		seed.curveTo (-rt45 + x, r + y, -rs90 + x, rs90 + y);
		seed.curveTo (-r + x, rt45 + y, -r + x, y);
	}
	function drawTank(tank) {
		var target = tank.createEmptyMovieClip("body",1);
		target._xscale = target._yscale=100*tankscale;
		target._x = -(5*tankscale);
		target._y = -(4.5*tankscale);
		target.lineStyle(1,0x000000,100);
		target.moveTo(1,0);
		target.lineTo(9,0);
		target.moveTo(0,1);
		target.lineTo(10,1);
		target.moveTo(1,2);
		target.lineTo(1,7);
		target.moveTo(9,2);
		target.lineTo(9,7);
		target.moveTo(0,8);
		target.lineTo(10,8);
		target.moveTo(1,9);
		target.lineTo(9,9);
		target.lineStyle(1,0xFFFFFF,100);
		for (var i = 2; i<9; i++) {
			target.moveTo(i,2);
			target.lineTo(i,7);
		}
	}
	function createTurret(tank) {
		var turret = tank.createEmptyMovieClip("turret",2);
		var target = turret.createEmptyMovieClip("graphics",1);
		var shot_exit = target.createEmptyMovieClip("shot_exit",1);
		shot_exit._x = 9;
		shot_exit._y = 2;
		target._xscale = target._yscale=100*tankscale;
		target._x = -(1.5*tankscale);
		target._y = -(2*tankscale);
		target.lineStyle(1,0x000000,100);
		target.moveTo(0,1);
		target.lineTo(0,3);
		target.moveTo(1,0);
		target.lineTo(2,0);
		target.moveTo(3,1);
		target.lineTo(3,3);
		target.moveTo(1,4);
		target.lineTo(2,4);
		target.moveTo(3,2);
		target.lineTo(9,2);
	}
	function lineOfSight(source,target,xam,yam) {
		//calculate line of sight
		var xdist, ydist, dist, angle
		var tyt = Math.floor(target._y/10);
		var txt = Math.floor(target._x/10);
		if(xam == undefined) {
			xdist = source._x-target._x;
			ydist = source._y-target._y;
			dist = Math.sqrt(xdist*xdist+ydist*ydist);
			angle = Math.atan2(-ydist,-xdist);
			xam = Math.cos(angle)*8;
			yam = Math.sin(angle)*8;
		}
		var x = source._x;
		var y = source._y;
		var yt = Math.floor(y/10);
		var xt = Math.floor(x/10);
		while(yt != tyt || xt != txt) {
			x += xam;
			y += yam;
			yt = Math.floor(y/10);
			xt = Math.floor(x/10);
			if (map[yt][xt] == 1) {
				return false;
				break;
			}
		}
		return angle*(180/Math.PI);
	}
	function explode(tank) {
		if (explosions) {
			var expl = tank._parent.createEmptyMovieClip("explode"+(count++),count);
			var part;
			var ref = this;
			var i;
			part = expl.createEmptyMovieClip("outline",0);
			part._x = tank._x;
			part._y = tank._y;
			part.lineStyle(0,0x000000,50);
			part.moveTo(10,0);
			for (i = 0;i<=7;i++) {
				part.curveTo(0,0,Math.cos(i*0.89)*10,Math.sin(i*0.89)*10);
			}
			part.onEnterFrame = function() {
				this._alpha -= 2;
				if(this._alpha <= 0) {
					this._parent.removeMovieClip();
				}
			}
			for (i = 1; i<num_particles; i++) {
				part = expl.createEmptyMovieClip("particle"+i,i);
				var angle = Math.random()*2*Math.PI;
				var ca = Math.cos(angle);
				var sa = Math.sin(angle);
				part._x = tank._x;
				part._y = tank._y;
				var vel = Math.random()*3-1.5;
				part.xspeed = ca*vel;
				part.yspeed = sa*vel;
				part._rotation = angle;
				part.parent = this;
				ref.drawBox(part,1,1,0,0,0x000000);
				part.onEnterFrame = function() {
					this._x += this.xspeed;
					this._y += this.yspeed;
					this._alpha -= 7;
					if (this._alpha<0) {
						this.removeMovieClip();
					}
				}
				;
			}
		}
	}
	function drawBox(target,xdim,ydim,x,y,col) {
		target.lineStyle(undefined);
		target.beginFill(col);
		target.moveTo(x,y);
		target.lineTo(x+xdim,y);
		target.lineTo(x+xdim,y+ydim);
		target.lineTo(x,y+ydim);
		target.endFill();
	}
	function drawMap(map,target) {
		for (var y = 0; y<map.length; y++) {
			for (var x = 0; x<map[y].length; x++) {
				if (map[y][x] == 1) {
					drawBox(target,10,10,x*10,y*10,0x000000);
				}
			}
		}
	}
	function defineGlobals(path) {
		count = 2;
		tanks = new Array();
		max_speed = 2;
		friction = .8;
		accel = .8;
		turnspeed = 5;
		bounce_factor = -0.7;
		tankscale = 1;
		num_enemies = 5;
		bullet_speed = 6;
		damage = 10;
		explosions = true;
		num_particles = 80;
	}
	function newTank(target,player,map,x,y,rotate) {
		var ob;
		var ref = this;
		var tank = target.createEmptyMovieClip("tank"+(count++),count);
		//draw the tank graphics
		drawTank(tank);
		createTurret(tank);
		//set position and define basic variable
		tank.sx = x;
		tank.sy = y;
		tank.sr = rotate;
		tank.player = player;
		tank._alpha = 0;
		tank.alive = false;
		tank.die = function() {
			if (this.alive) {
				ref.explode(this);
			}
			this.alive = false;
			this.onEnterFrame = function() {
				if (this._alpha>0) {
					this._alpha -= 7;
				} else {
					this._x = this.sx*10;
					this._y = this.sy*10;
					this._rotation = this.mov_angle = this.sr
					this.turret._rotation = 0;
					this.vel = 0;
					ref.calculateTreads(tank);
					this.mine_count = 0;
					this.mine = false;
					this.max_speed = ref.max_speed;
					this.turnspeed = ref.turnspeed;
					this.mine_rate = ref.mine_rate;
					this.shoot_rate = ref.shoot_rate;
					//apply key controls if tank is player controlled
					if (player) {
						this.shot = false;
						this.onEnterFrame = function() {
							if (this._alpha<100) {
								this._alpha += 5;
							} else {
								this.alive = true;
							}
							ref.calculateTreads(this);
							ref.drawTreads(this);
							this.vel *= ref.friction;
							//get rid of errors caused by decimal anomalies
							this.vel = Math.floor(this.vel*10)/10;
							if (Key.isDown(Key.UP)) {
								//acceleration style 2
								this.vel = Math.min(this.max_speed,this.vel+ref.accel);
							}
							if (Key.isDown(Key.DOWN)) {
								//acceleration style 2
								this.vel = Math.max(-this.max_speed,this.vel-ref.accel);
							}
							if (Key.isDown(Key.LEFT)) {
								this._rotation -= this.turnspeed;
							}
							if (Key.isDown(Key.RIGHT)) {
								this._rotation += this.turnspeed;
							}
							//turret rotation
							if (Key.isDown(65)) {
								this.turret._rotation -= this.turnspeed;
							}
							if (Key.isDown(68)) {
								this.turret._rotation += this.turnspeed;
							}
							//shooting
							if (Key.isDown(Key.SPACE)) {
								if (this.shot == false) {
									this.shoot();
									this.shot = true;
								}
							} else {
								this.shot = false;
							}
							//reverse direction
							if (Key.isDown(83)) {
								if (this.reverse == false) {
									this.reverseDirection();
									this.reverse = true;
								}
							} else {
								this.reverse = false;
							}
							//place a mine
							if(this.mine_count > this.mine_rate) {
								if(Key.isDown(87)) {
									if(this.mine == false) {
										this.placeMine();
										this.mine_count = 0;
										this.mine = true;
									}
								} else {
									this.mine = false;
								}
							} else {
								this.mine_count++;
							}
							//movement calculations
							var xmov = Math.cos(this._rotation*(Math.PI/180))*this.vel;
							var ymov = Math.sin(this._rotation*(Math.PI/180))*this.vel;
							//wall collision
							ob = new Object();
							ob.clip = this;
							ob.height = this.body._height/2;
							ob.width = this.body._width/2;
							ob.x = this._x;
							ob.y = this._y;
							ob.xtile = Math.floor(this._x/10);
							ob.ytile = Math.floor(this._y/10);
							//movement
							ref.getCorners(this._x,this._y+ymov,ob);
							if (ymov<0) {
								if (ob.upleft && ob.upright) {
									ob.y += ymov;
								} else {
									ob.y = ob.ytile*10+ob.height;
								}
							}
							if (ymov>0) {
								if (ob.downleft && ob.downright) {
									ob.y += ymov;
								} else {
									ob.y = (ob.ytile+1)*10-ob.height;
								}
							}
							ref.getCorners(this._x+xmov,this._y,ob);
							if (xmov<0) {
								if (ob.upleft && ob.downleft) {
									ob.x += xmov;
								} else {
									ob.x = ob.xtile*10+ob.width;
								}
							} else if (xmov>0) {
								if (ob.upright && ob.downright) {
									ob.x += xmov;
								} else {
									ob.x = (ob.xtile+1)*10-ob.width;
								}
							}
							this._x = ob.x;
							this._y = ob.y;
						}
						;
					} else {
						this.count = Math.floor(Math.random()*15);
						this.shoot_count = 0;
						this.los = -1;
						this.decel = 0;
						this.mov_angle = this._rotation;
						this.chase = 0;
						this.onEnterFrame = function() {
							var xdist,ydist,dist,angle,xam,yam,ca,sa,tx,ty,dif,rot;
							if (this._alpha<100) {
								this._alpha += 5;
							} else {
								this.alive = true;
							}
							this.count++;
							this.mine_count++;
							if(this.count > 2999) {
								this.count = 0;
							}
							//draw tread marks
							ref.calculateTreads(this);
							ref.drawTreads(this);
							//calculate current position
							this.scx = Math.floor(this._x/10);
							this.scy = Math.floor(this._y/10);
							ca = Math.cos(this._rotation*(Math.PI/180));
							sa = Math.sin(this._rotation*(Math.PI/180));
							//
							//rotate turret if line of site
							//
							if (ref.tanks[this.los].alive == false) {
								this.los = -1;
							}
							this.olos = this.los;
							if (this.los > -1 && this.count % 15 == 0) {
								this.los_angle = ref.lineOfSight(this,ref.tanks[this.los]);
								if(this.los_angle == false) {
									this.los = -1;
								}
							} else if(this.los == -2 && (this.count-1) % 15 == 0) {
								if(ref.powerups[this.pwup]._visible == true) {
									this.los_angle = ref.lineOfSight(this,ref.powerups[this.pwup]);
									if(this.los_angle == false) {
										this.los = -1;
									}
								}
							}
							if (this.los < 0) {
								for (var k = 0; k<ref.tanks.length; k++) {
									if (k != this.olos && ref.tanks[k] != this) {
										this.los_angle = ref.lineOfSight(this,ref.tanks[k]);
										if(this.los_angle != false) {
											this.los = k;
											break;
										}
									}
								}
							}
							if(this.los_angle == false) {
								this.los_angle = this._rotation;
								this.decel = 0;
							}
							//chase or run
							if(this.los > -1 && this.chase == 0) {
								dif = Math.abs(this.los_angle-this._rotation);
								if(dif > 90 && dif < 270) {
									this.chase = -1; //run
								} else {
									this.chase = 1; //chase
								}
							} else if(this.los == -2) {
								this.chase = 1;
							} else if(this.los == -1) {
								this.chase = 0;
							}
							if(this.chase == -1) {
								this.mov_angle = this.los_angle+180;
							} else if(this.chase == 1) {
								this.mov_angle = this.los_angle;
							}
							if(this.los == -1) {
								this.mov_angle += Math.random()*15-7.5;
							}
							//
							//follow random path
							//
							if (Math.abs(this.mov_angle-this._rotation)>1) {
								if (this.mov_angle<0) {
									this.mov_angle += 360;
								} else if (this.mov_angle>360) {
									this.mov_angle -= 360;
								}
								this.rot = (this._rotation);
								if (this.rot<0) {
									this.rot += 360;
								} else if (rot>360) {
									this.rot -= 360;
								}
								dif = Math.abs(this.mov_angle-this.rot)
								if(this.rot > 0 && this.rot <= 90) {
									if(this.mov_angle > 180+this.rot || this.mov_angle < this.rot) {
										this._rotation -= Math.min(dif,this.turnspeed);
									} else {
										this._rotation += Math.min(dif,this.turnspeed);
									}
								} else if(this.rot > 90 && this.rot <= 180) {
									this.rot -= 90;
									if(this.mov_angle < this.rot+90 || this.mov_angle > 360-this.rot) {
										this._rotation -= Math.min(dif,this.turnspeed);
									} else {
										this._rotation += Math.min(dif,this.turnspeed);
									}
								} else if(this.rot > 180 && this.rot <= 270) {
									this.rot -= 180;
									if(this.mov_angle < this.rot+180 && this.mov_angle > this.rot) {
										this._rotation -= Math.min(dif,this.turnspeed);
									} else {
										this._rotation += Math.min(dif,this.turnspeed);
									}
								} else {
									this.rot -= 270;
									if(this.mov_angle > 270+this.rot || this.mov_angle < 90+this.rot) {
										this._rotation += Math.min(dif,this.turnspeed);
									} else {
										this._rotation -= Math.min(dif,this.turnspeed);
									}
								}
								if(this._rotation < 0) {
									this._rotation += 360;
								} else if(this._rotation > 360) {
									this._rotation -= 360;
								}
							}
							dif = Math.abs(this.los_angle-this.turret._rotation+this._rotation);
							if (dif>3) {
								if (this.los_angle<0) {
									this.los_angle += 360;
								} else if (this.los_angle>360) {
									this.los_angle -= 360;
								}
								this.rot = (this.turret._rotation+this._rotation);
								if (this.rot<0) {
									this.rot += 360;
								} else if (rot>360) {
									this.rot -= 360;
								}
								dif = Math.abs(this.los_angle-this.rot);
								if(this.rot > 0 && this.rot <= 90) {
									if(this.los_angle > 180+this.rot || this.los_angle < this.rot) {
										this.turret._rotation -= Math.min(dif,this.turnspeed);
									} else {
										this.turret._rotation += Math.min(dif,this.turnspeed);
									}
								} else if(this.rot > 90 && this.rot <= 180) {
									this.rot -= 90;
									if(this.los_angle < this.rot+90 || this.los_angle > 360-this.rot) {
										this.turret._rotation -= Math.min(dif,this.turnspeed);
									} else {
										this.turret._rotation += Math.min(dif,this.turnspeed);
									}
								} else if(this.rot > 180 && this.rot <= 270) {
									this.rot -= 180;
									if(this.los_angle < this.rot+180 && this.los_angle > this.rot) {
										this.turret._rotation -= Math.min(dif,this.turnspeed);
									} else {
										this.turret._rotation += Math.min(dif,this.turnspeed);
									}
								} else {
									this.rot -= 270;
									if(this.los_angle > 270+this.rot || this.los_angle < 90+this.rot) {
										this.turret._rotation += Math.min(dif,this.turnspeed);
									} else {
										this.turret._rotation -= Math.min(dif,this.turnspeed);
									}
								}
								if(this.turret._rotation < 0) {
									this.turret._rotation += 360;
								} else if(this.turret._rotation > 360) {
									this.turret._rotation -= 360;
								}
							}
							this.shoot_count++;
							if (dif<15 && this.shoot_count % 5 == 0 && ref.tanks[this.los].alive == true) {
								this.shoot();
							}
							//obstacle avoidance
							x = this.rbx+ca*5;
							y = this.rby+sa*5;
							this.rcol = 0;
							this.lcol = 0;
							for (var k = 6; k>0; k--) {
								if (ref.map[Math.floor(y/10)][Math.floor(x/10)] == 1) {
									this.rcol = k;
									break;
								}
								x += ca*3;
								y += sa*3;
							}
							x = this.lbx+ca*5;
							y = this.lby+sa*5;
							for (var k = 6; k>0; k--) {
								if (ref.map[Math.floor(y/10)][Math.floor(x/10)] == 1) {
									this.lcol = k;
									break;
								}
								x += ca*4;
								y += sa*4;
							}
							var mult,mult2;
							if(this.rcol > this.lcol) {
								mult = this.rcol*1.3;
								mult2 = this.lcol/-1.5;
							} else if(this.lcol > this.rcol) {
								mult = this.lcol*-1.3;
								mult2 = this.rcol/1.5;
							}
							this._rotation += this.turnspeed*mult;
							//this._rotation += this.turnspeed*mult2;
							this.mov_angle = this._rotation;
							if(this.rcol > 0 && this.lcol > 0) {
								if(this.col_count++ > 30) {
									this.decel = 0;
									this.reverseDirection();
									this.col_count = 0;
								}
							} else {
								this.col_count = 0;
							}
							this.vel = Math.min(this.max_speed,this.vel+ref.accel);
							//
							//rotation/movement
							//
							//movement
							//movement calculations
							this.vel *= ref.friction;
							this.vel = Math.floor(this.vel*10)/10;
							var xmov = ca*this.vel;
							var ymov = sa*this.vel;
							//wall collision
							ob = new Object();
							ob.clip = this;
							ob.height = this.body._height/2;
							ob.width = this.body._width/2;
							ob.x = this._x;
							ob.y = this._y;
							ob.xtile = Math.floor(this._x/10);
							ob.ytile = Math.floor(this._y/10);
							//movement
							ref.getCorners(this._x,this._y+ymov,ob);
							if (ymov<0) {
								if (ob.upleft && ob.upright) {
									ob.y += ymov;
								} else {
									ob.y = ob.ytile*10+ob.height+1;
									this.collide();
								}
							}
							if (ymov>0) {
								if (ob.downleft && ob.downright) {
									ob.y += ymov;
								} else {
									ob.y = (ob.ytile+1)*10-ob.height-1;
									this.collide();
								}
							}
							ref.getCorners(this._x+xmov,this._y,ob);
							if (xmov<0) {
								if (ob.upleft && ob.downleft) {
									ob.x += xmov;
								} else {
									ob.x = ob.xtile*10+ob.width+1;
									this.collide();
								}
							} else if (xmov>0) {
								if (ob.upright && ob.downright) {
									ob.x += xmov;
								} else {
									ob.x = (ob.xtile+1)*10-ob.width-1;
									this.collide();
								}
							}
							this._x = ob.x;
							this._y = ob.y;
						}
						tank.collide = function() {
							//this.reverseDirection();
						}
					}
					tank.reverseDirection = function() {
						this._rotation += 180;
						this.turret._rotation += 180;
						this.mov_angle += 180+Math.random()*90-45;
						this.vel *= -1;
						ref.calculateTreads(this);
					}
					tank.shoot = function() {
						var bullet = this._parent.createEmptyMovieClip("bullet"+(ref.count++),ref.count);
						ref.elevateTankDepth();
						var angle = this.turret._rotation+this._rotation;
						var ca = Math.cos(angle*(Math.PI/180));
						var sa = Math.sin(angle*(Math.PI/180));
						bullet._x = ca*9+this._x;
						bullet._y = sa*9+this._y;
						bullet.xspeed = ca*ref.bullet_speed;
						bullet.yspeed = sa*ref.bullet_speed;
						bullet._rotation = angle;
						bullet.parent = this;
						ref.drawBox(bullet,1,1,0,0,0x000000);
						bullet.onEnterFrame = function() {
							this._x += this.xspeed;
							this._y += this.yspeed;
							if (ref.map[Math.floor(this._y/10)][Math.floor(this._x/10)] == 1 || this._x>400 || this._x<0 || this._y>400 || this._y<0) {
								this.removeMovieClip();
							} else {
								for (var i in ref.tanks) {
									if (ref.tanks[i].hitTest(this) && ref.tanks[i] != this.parent && ref.tanks[i].alive) {
										ref.tanks[i].die();
										this.removeMovieClip();
									} else {
										if(ref.lineOfSight(this,ref.tanks[i],this.xpeed,this.yspeed) != false) {
											ref.tanks[i].bullet_alert = this;
										}
									}
								}
							}
						}
					}
				}
			}
		}
		tank.die();
		return tank;
	}
	public static function main () {
		var b = new BattleTanks(_root);
	}
}