Comments on: Detect collision between two objects

By: Cole Mizzi

Cole Mizzi — Wed, 07 Apr 2010 22:43:31 +0000

I am a novice ” actionscripter” and experimented around with the code provided to come up perhaps with a better code. The following allows you to move the car all around and to use the key after collision with the object, while stopping car_mc. Can you tell me if this is effective code, or is there a more efficient way?

Copy and paste below
V V V V V V

stage.addEventListener(KeyboardEvent.KEY_DOWN,moveCar);

function moveCar(evt:KeyboardEvent) {
if (evt.keyCode == Keyboard.LEFT) {
car_mc.x -=8;
if (car_mc.hitTestObject(line_mc)) {
car_mc.x +=8;
}
}

if (evt.keyCode == Keyboard.RIGHT) {
car_mc.x +=8;
if (car_mc.hitTestObject(line_mc)) {
car_mc.x -=8;
}
}
if (evt.keyCode == Keyboard.UP) {
car_mc.y -=8;
if (car_mc.hitTestObject(line_mc)) {
car_mc.y +=8;
}
}
if (evt.keyCode == Keyboard.DOWN) {
car_mc.y +=8;
if (car_mc.hitTestObject(line_mc)) {
car_mc.y -=8;
}
}
}

^^ ^ ^^ ^ ^^
Copy and paste above

By: shirley B

shirley B — Sat, 20 Mar 2010 05:38:39 +0000

Thanks for the tutorial. I was trying to create a similar situation between a ball and a person. this was useful.

By: Subash

Subash — Mon, 11 Jan 2010 13:34:33 +0000

the tutorial is really great, i was wondering as the finish line for the car is one object, what if i need to make the car smashing to a tree for a game which am developing, i have a tree movieclip on stage as you have “line_mc” and instance name as tree_mc, wheni set the same tree by manually duplicating and placing where i want and use the hittestobject it works only for one tree not for multiple trees, could you suggest on this

thx

By: Collision Detection in AS3 | FREE flash tutorials | The Dude

Collision Detection in AS3 | FREE flash tutorials | The Dude — Thu, 20 Aug 2009 15:51:32 +0000

[...] View tutorial // [...]