AS3 HitTestPoint / Collision Detection / Car Game

1

Hi guys and girls,

Never had much luck on Forums in the past but i have been urged to try out this site, so here i am.

My problem is simple (i imagine) i have in the past made a simple car game that collects coins. In the past to stop the car from going off the stage i used a peice of code like…

                var playerBounds = car_mc.getBounds(stage);
                if (playerBounds.left < 0 || playerBounds.right > stage.stageWidth)
                {
                    if (speed < 0)
                    {
                        car_mc.rotation + 10;
                        speed = speed  + speedAcceleration;
                        trace (speed);
                        trace ("speed < 0");
                    }
                    if (speed > 0)
                    {
                        trace ("hellllllo");
                        car_mc.rotation + 10;
                        speed = speedMaxReverse;
                    }                    
                        
                }

This would then do the appropiate turns/speed reductions to simulate a bounce off effect.

Now my level is a bit more demanding, made up of several different “islands”, and bridges where the rules are different. See image below:

If the car bounces into any of the walls on the green “islands” i want it to do the similar bouncing off effect, If they hit the edges on the brown “bridges” i want the car to fall off (some animation/tween to simulate falling and then loose a life and start again).

I have tried converting the line of the side of one of the islands to a movieclip, and doing a test against it like so:

                if (Boundary1.hitTestPoint(car_mc.x, car_mc.y, true))
                {
                trace ("Collision Detected");               
                }

But this does not do anything at all. Any ideas please i am going mad.

Thanks in advance
Chris