i have a snake game, that after time loads sprites in an array to make the snake grow. Just wondering how i would go about adding a hit so when the head of the snake hits the body something happens. Below is the full document class code.
<code>
package {
import flash.display.Sprite;[CODE].....
Hey guys, thanks in advance for any help, I'd be stuck all the time without these forums.
I have a custom class(Ball) and a .FLA. Ignore the custom class, it works fine, having a problem within my main FLA.
I'm getting repeated "Error #1009: Cannot access a property or method of a null object reference. at Environment_fla::MainTimeline/hitTest()".
I understand that this error means I'm asking it to reference something that's no longer there. I just can't figure out why I'm getting it, and how better to hitTest many objects in an array.
My game involves creating a bunch of balls that will fall into buckets. I need to keep track of how many touched the buckets, how many fell off the screen, and remove each accordingly.
Thanks again, very much appreciated.
Here is the code from my main FLA
[as]var ballTimer:Timer = new Timer(200);
var changeTimer:Timer = new Timer(50000);
ballTimer.addEventListener(TimerEvent.TIMER, throwBall, false, 0, true);
ballTimer.start();
changeTimer.addEventListener(TimerEvent.TIMER, changeColor);
changeTimer.start();
//Environment variables
var gravity:int = 1.5;
var friction:Number = .85;
var color:int = 2;
//score variables
var YellowScore:int = 0;
var BlackScore:int = 0;
var tBall:Ball = new Ball(new Point(mouseX, mouseY), new Point(Math.random() + Math.random()*5 + Math.random()*8), gravity, friction);
var ballArray:Array = new Array();
function throwBall(e:TimerEvent):void {
var tBall:Ball = new Ball(new Point(mouseX, mouseY), new Point(Math.random() + Math.random()*5 + Math.random()*8), gravity, friction);
tBall.addEventListener(Event.ENTER_FRAME, hitTest);
tBall.gotoAndStop(color);
addChild(tBall);
ballArray.push(tBall);
}
function changeColor(e:TimerEvent):void {
if (color == 1) {
color = 2;
return;
}
if (color == 2) {
color = 1;
}
}
function hitTest(e:Event) {
trace(ballArray.length);
for (var i = 0; i < ballArray.length - 1 ; i++) {
if ((ballArray[i].hitTestObject(YellowBucket1) && ballArray[i].currentFrame == 2)) {
YellowScore += 1; //trace(YellowScore); trace("Space");
ballArray[i].parent.removeChild(ballArray[i]);
ballArray.shift();
break;
}
else if ((ballArray[i].hitTestObject(YellowBucket1) && ballArray[i].currentFrame == 1)) {
YellowScore -= 1;
}
else if ((ballArray[i].hitTestObject(BlackBucket1) && ballArray[i].currentFrame == 2)) {
BlackScore -= 1;
}
else if ((ballArray[i].hitTestObject(BlackBucket1) && ballArray[i].currentFrame == 1)) {
BlackScore += 1; trace("BlackScore");
}
else if (ballArray[i].y > stage.stageHeight || ballArray[i].x > stage.stageWidth) {
trace("cleanUp");
ballArray[i].parent.removeChild(ballArray[i]);
ballArray.shift();
}
}
updateScore();
}
function updateScore() {
BlackBucket_txt.text = String(BlackScore);
YellowBucket_txt.text = String(YellowScore);
}
[/as]
I'm trying to have an enemy's shell hit my player. I have the logic in place that detects a player's bomb hit an enemy, I tried to edit it slightly and apply the same logic to the enemies shell.
Code:
// check for collisionspublic function checkHits(event:Event)
{
[code]......
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View 2 RepliesI am creating a game where I have two separate arrays of objects that I need hitTested with each other. I found an old tutorial in AS2 that I modified to come up with this code:
ActionScript Code:
for (var w:Number = 0;w < enemyLaserArray.length;w++) {
for (var R:Number = 0;R < barricade1Array.length-1;R++) {
if (enemyLaserArray[w].hitTestObject(barricade1Array[R])) {
[code]....
This code executes like I believe it should, but along with removing the two objects, and splicing them from their arrays, I get this error
Code:
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a little while ago I saw something on this website:[URL]...I decided I wanted to recreate something like it.
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I've attached a zip with a few custom classes and a .FLA. Ignore the custom classes. I'm getting repeated
"Error #1009: Cannot access a property or method of a null object reference. at Environment_fla::MainTimeline/hitTest()".
I understand that this error means I'm asking it to reference something that's no longer there. How better to hitTest many objects in an array. My game involves creating a bunch of balls that will fall into buckets. I need to keep track of how many touched the buckets, how many fell off the screen, and remove each accordingly.
Here is the code from my main FLA
ActionScript Code:
var ballTimer:Timer = new Timer(200);
var changeTimer:Timer = new Timer(50000);
ballTimer.addEventListener(TimerEvent.TIMER, throwBall, false, 0, true);
ballTimer.start();
changeTimer.addEventListener(TimerEvent.TIMER, changeColor);
changeTimer.start();
[Code] .....
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package
{
import com.martino.objects.Square;
[code]....
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onClipEvent(load)
{
facing = _root.player.facing;
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[code]....
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[Code]....
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[code]....
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for (var i = 1; i < snake.length; i++){ //this is where I am trying to make the hit
if (Math.floor(snake[0].x) == Math.floor(s.x) && Math.floor(snake[0].y) == Math.floor(s.y) ){
[code]....
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[Code]...
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