[AS3] Heat Seeking Missile

[Russkie]

Hi,

I've looked up the AS2 Heat seeking missile example, but it doesn't work for my game. The position parameters are the target. This game is also a fully scrollable terrain jet fighter game. The Missile doesn't rotate in the correct direction, doesn't turn towards the target, for example if the target is behind the missile.

public function setGuidance(index:Number,posx:Number,posy:Number, rate:Number):void{
			var it=index;
			var disX = 0;
			var disY = 0;
			var disTot = 0;
			var turnRate = rate;
			var moveX = 0;
			var moveY = 0;
			var totalMov = 0;
			var rot = 0;
			var moveTot = 0;
			
				
				if(this.missiles[it].launched && this.missiles[it].guidance){
					
					disX =  posx - (this.missiles[it].object as Bitmap).x;
					disY =  posy - (this.missiles[it].object as Bitmap).y;
					disTot = Math.sqrt(disX*disX + disY*disY);
					
					if(disTot <= 1000){
						
						rot = (this.missiles[it].object as Bitmap).rotation;
						moveX = turnRate * (disX / disTot);
						moveY = turnRate * (disY / disTot);
						moveTot = Math.sqrt(moveX*moveX + moveY*moveY);
						
						this.missiles[it].xspeed+=moveX;
						this.missiles[it].yspeed+=moveY;
						
						
						moveX = this.missiles[it].xspeed*moveX / moveTot;
						moveY = this.missiles[it].yspeed*moveY / moveTot;
						
						(this.missiles[it].object as Bitmap).x += moveX;
						(this.missiles[it].object as Bitmap).y += moveY;
						
						(this.missiles[it].object as Bitmap).rotation =180*Math.atan2(moveY, moveX) / Math.PI;
						
						
					}
				}

[dandylion13]

Are those the stage positions or the map position?
They need to be the stage positions, but you'll also need to continually compensate for the scrolling background each frame.