Codezwiz >> Forums >> Flash Help >> BOUNDARY PROBLEM PLEASE HELP :(

hi all

i have managed to get the top right and left boundaries to work but the bottom boundary allows my car to drive straight thru it into nothingness and out of the game;

im a reveltive begginer to flash, i have pasted my script for the car below so maybe someone can help and tell me where i am going wrong, my stage size is 550 by 400 if that helps. i have tried some different combinations, but they just didnt work!!

onClipEvent (enterFrame) {
//When key UP is pressed, speed is increased
if (Key.isDown(Key.UP)) {
speed += 1;
} else {
//When key DOWN is pressed, speed is decreased
if (Key.isDown(Key.DOWN)) {
speed -= 1;
} else {
//If UP or DOWN aren't pressed then the speed decreases
speed *= .9
}
}
//The car will start to slow down after the speed of 25
if (Math.abs(speed)>25) {
speed *= .6;
}
//Turns the car left
if (Key.isDown(Key.LEFT)) {
_rotation -= speed;
}
//Turns the car right
if (Key.isDown(Key.RIGHT)) {
_rotation += speed;
}
//Moves the car
speed *= .9;
x = Math.sin(_rotation*(Math.PI/180))*speed;
y = Math.cos(_rotation*(Math.PI/180))*speed*-1;
if (!_root.move.hitTest(_x+x, _y+y, true)) {
_x += x;
_y += y;
} else {
speed *= -.3;
}
}
onClipEvent(enterFrame) {
if (_y>550) {
_y=550;
}
if (_y<0) {
_y=0;
}
if (_x>550) {
_x=550;
}
if (_x<0) {
_x=0;
}
}

p.s. i need to add a boundary to split the screen because i am making a 2 player game, how do i add a single line boundary??

your help will be much appriciated, thanks again, Georgie