This is the code i have got so far for a single falling object. The 'DangerIN' is the instance name for the object that is falling down. The class is named 'Danger'. So how can i make it loop so it falls continuously and when it reaches certain y value it will remove it self. Also i want more than one(abount 5) objects falling down at once.
var randomX:Number = Math.random() * 550;
DangerIN.x = randomX;
DangerIN.y = 96;
var speed:Number = Math.random()*10;
DangerIN.addEventListener(Event.ENTER_FRAME, moveDown);
function moveDown(e:Event):void {
e.target.y += speed;
if(e.target.y >= 610) {
DangerIN.removeEventListener(Event.ENTER_FRAME, moveDown);
}
}
It's easy. But to do that, you first need an Array of falling stuff, and then you need to reposition your e.target to the top once it's below your threshold.
function moveDown(e:Event):void {
e.target.y += speed;
if (e.target.y >= 610) {
// reposition
e.target.x=math.random()*550;
e.target.y=96;
}
}
Assign this function to every object you want to fall down, reach bottom and reappear back up.
To remove itself you can add a following line after the removeEventListener():
parent.removeChild(this);
But it's not pretty and you probably should to it the right way:
Store all the Danger objects in the array, in the Danger class create a function like go(), moveDown() or something:
public function go():void
{
y+= speed;
}
and in the class where you create the Danger objects make a loop like this:
private function loop():void
{
for (var i:int = dangerObjArray.lenght - 1; i >= 0; i--)
{
dangerObjArray[i].go();
if (dangerObjArray[i].y >= maxY)
dangerObjArray.splice(i , 1);
}
}
Related
I'm working on a Flash game for an assignment. It's a pretty standard missile defense-type game, with a rotating missile launcher in the center firing up at passing bombers above. The missiles and bombers are functioning correctly by themselves, but I'm running into a problem when I try to get the two to interact. Specifically, when a missile hits a bomber, I want the specific instances of that missile and that bomber to be removed from the screen and have their respective event listeners removed, but everything I've tried has failed and I can't seem to figure out just how to do it.
Here are the Main, Bomber, and Missile classes I'm working with:
The Main Class:
package {
import flash.display.Stage;
import flash.display.MovieClip;
import flash.events.Event;
import flash.events.MouseEvent;
public class Main extends MovieClip {
public var background:Background;
public var launcher:Launcher;
public var mount:Mount;
public var missile:Missile;
public var salvo:Array = [];
public var bomber:Bomber;
public var squadron:Array = [];
/*
* This function sets up the permanent items (items that remain on-stage for
* the duration of the game) and adds event listeners that call functions to
* add non-permanent items to the stage
*/
public function Main() {
// Add background to the stage
background = new Background(stage);
stage.addChild(background);
stage.setChildIndex(background, 0);
// Add the rotating launcher to the stage
launcher = new Launcher(stage);
stage.addChild(launcher);
stage.setChildIndex(launcher, 1);
// Add the static mount to the stage (on top of launcher)
mount = new Mount(stage);
stage.addChild(mount);
stage.setChildIndex(mount, 2);
// Call loop() every new frame
stage.addEventListener(Event.ENTER_FRAME, loop);
// Call fire() every time the mouse is clicked
stage.addEventListener(MouseEvent.CLICK, fire);
}
/*
* This function runs every time the program enters a new frame, or 60 times
* every second. Each time this function runs, it tries to add a new Bomber
* to the squadron array and checks to see if there are any Missiles or
* Bombers currently in their respective arrays (and if so, calls a function
* to make them move).
*/
public function loop(evt:Event) {
// If the random number generated by Math.random() is less than
// waveLimiter, create a new Bomber and add it to the squadron array.
if(Math.random() < 0.02 /* Change this number to change how fast bombers spawn */) {
bomber = new Bomber(stage);
bomber.addEventListener(Event.REMOVED_FROM_STAGE, removeBomber); // If the Bomber is removed from the stage, call removeBomber() to remove its event handler.
squadron.push(bomber);
stage.addChild(bomber);
stage.setChildIndex(bomber, 1);
}
// Check to see if there is at least one missile in the salvo array, and
// if so, call Missile.velocity() to make it move.
if(salvo.length > 0) {
for(var i:int = salvo.length - 1; i >= 0; i--) {
salvo[i].velocity();
}
}
// Check to see if there is at least one bomber in the squadron array,
// and if so, call Bomber.fly() to make it move.
if(squadron.length > 0) {
for(var j:int = squadron.length - 1; j >= 0; j--) {
squadron[j].fly();
}
}
}
/*
* This function checks for a mouse click, and if it detects one, creates a
* new Missile and adds it to the salvo array.
*/
public function fire(evt:MouseEvent) {
missile = new Missile(stage, launcher.rotation);
missile.addEventListener(Event.REMOVED_FROM_STAGE, removeMissile); // If the Missile is removed from the stage, call removeMissile() to remove its event handler.
salvo.push(missile);
stage.addChild(missile);
stage.setChildIndex(missile, 1);
}
/*
* This function removes the EVENT LISTENER for the current Missile instance.
* It does not remove the Missile itself from the stage.
*/
public function removeMissile(evt:Event):void {
evt.currentTarget.removeEventListener(Event.REMOVED_FROM_STAGE, removeMissile);
salvo.splice(salvo.indexOf(evt.currentTarget), 1);
}
/*
* This function removes the EVENT LISTENER for the current Bomber instance.
* It does not remove the Bomber itself from the stage.
*/
public function removeBomber(evt:Event) {
evt.currentTarget.removeEventListener(Event.REMOVED_FROM_STAGE, removeBomber);
squadron.splice(squadron.indexOf(evt.currentTarget), 1);
}
}
}
The Bomber class:
package {
import flash.display.Stage;
import flash.display.MovieClip;
public class Bomber extends MovieClip {
var stageInstance:Stage;
var randomNumber:Number = Math.round(Math.random() * 1);
public function Bomber(stageInstance:Stage):void {
this.stageInstance = stageInstance;
if(randomNumber == 1) {
x = -39;
y = (Math.random() * 120) + 30;
}
else if(randomNumber == 0) {
scaleX *= -1;
x = 679;
y = (Math.random() * 120) + 30;
}
}
public function fly():void {
if(randomNumber == 1) {
x = x + 4;
}
else if(randomNumber == 0) {
x = x - 4;
}
if(x > 680 || x < -40) {
this.parent.removeChild(this);
}
}
}
}
The Missile Class:
package {
import flash.display.Stage;
import flash.display.MovieClip;
public class Missile extends MovieClip {
var stageInstance:Stage;
var velocityX:Number;
var velocityY:Number;
var speed:Number = 10;
var rotationRadians:Number;
var rotationDegrees:Number;
public function Missile(stageInstance:Stage, rotationDegrees:Number):void {
this.stageInstance = stageInstance;
x = 320;
y = 363;
rotation = rotationDegrees;
rotationRadians = rotationDegrees * Math.PI / 180;
}
public function velocity():void {
velocityX = Math.cos(rotationRadians) * speed;
velocityY = Math.sin(rotationRadians) * speed;
x += velocityX;
y += velocityY;
if(x > 640 || x < 0 || y > 480 || y < 0) {
this.parent.removeChild(this);
}
}
}
}
In the Main Class, I've tried adding something like this:
if(squadron.length > 0) {
for(var j:int = squadron.length - 1; j >= 0; j--) {
squadron[j].fly();
if(salvo.length > 0) {
if(missile.hitTestObject(squadron[j])) {
this.parent.removeChild(this);
}
}
}
}
But no luck. I've also tried using a trace statement, and it doesn't even give me an output, which leads me to think it's not even detecting collision at all. Any ideas?
Update: I added a few more details.
this represents the object on which the function is called. So
this.parent.removeChild(this); makes no sense when it is written in the main class.
When you write it in the Missile Class, this is the Missile instance, and this.parent is the stage.
Try replacing it with: stage.removeChild(missile), in the last sample of code you posted, and call removeMissile() just after.
Try to use stage.removeChild instead this.parent.removeChild(this);
Actually you have many problems in your code. First of all, you don't need to work with Stage. You can work with your main container Main. When you add object to the display list, don't do after setChildIndex. In your code It doesn't have any sense. Also you don't need any length conditions. And create light objects by extending Sprite, not MovieClip.
Code for your loop, for missiles:
private function loop(e: Event):void {
//...not full listing
var i:uint, j:uint, salvos:uint = salvo.length, bombers:uint = squadron.length, missile:Missle, bomber:Bomber;
var disposeMissiles:Array = [];
var disposeBombers:Array = [];
//Rendering missiles
for (i = 0; i < salvos; ++i) {
missile = salvo[i];
missile.valocity();
for (j = 0; j < bombers; ++j) {
bomber = squadron[j];
if (!bomber.isHitted() && missile.hitTestObject(bomber)) {
//Dispose both missile and bomber
bomber.setHitted = true;
disposeMissiles.push(missile);
disposeBombers.push(bomber);
}
}
}
//Clear lists and display list
disposeObjects(disposeMissiles, salvo);
disposeObjects(disposeBombers, squadron);
}
private function disposeObjects(objects:Array, from:Array):void {
//Create interface for both missiles and bombers, like IGameActor
var i:uint, len:uint = objects.length, objectToRemove:IGameActor;
for (i; i < len; ++i) {
objectToRemove = objects[i];
//Remove from the display list, in your design Parent is Stage
this.stage.removeChild(DisplayObject(objectToRemove));
//Release memory, links, event listeners
objectToRemove.dispose();
//Try manage also indexes, splice is slow operation
from.splice(from.indexOf(objectToRemove), 1);
}
}
I am making a game where insects come down from the top of the screen, and the user must kill them. The insects are in an array. Each time the user kills them, the score goes up..after a while the insects get faster and faster. When they get faster, some of them don't get killed when you click them. You have to click multiple times for them to die. I want them to get killed in one click, but this isn't working when they get faster!
function makeEnemies():void
{
var chance:Number = Math.floor(Math.random() * 150);
if (chance <= + level)
{
//Make sure a Library item linkage is set to Enemy...
tempEnemy = new Enemy();
//Math.random(); gets a random number from 0.0-1.0
tempEnemy.x = Math.round(Math.random() * 1000);
addChild(tempEnemy);
enemies.push(tempEnemy);
tempEnemy.speed = enemyBaseSpeed + ((level - 1) * speedLevelInc);
}
}
function moveEnemies():void
{
var tempEnemy:MovieClip;
for (var i:int =enemies.length-1; i>=0; i--)
{
tempEnemy=enemies[i];
if (tempEnemy.dead)
{
score++;
score++;
roachLevel.score_txt.text = String(score);
enemies.splice(i,1);
}
else // Enemy is still alive and moving across the screen
{
//rotate the enemy between 10-5 degrees
tempEnemy.rotation += (Math.round(Math.random()*.4));
//Find the rotation and move the x position that direction
tempEnemy.x -= (Math.sin((Math.PI/180)*tempEnemy.rotation))*tempEnemy.speed;
tempEnemy.y += (Math.cos((Math.PI/180)*tempEnemy.rotation))*tempEnemy.speed;
if (tempEnemy.x < 10)
{
tempEnemy.x = 11;
}
if (tempEnemy.x > stage.stageWidth - offset)
{
tempEnemy.x = stage.stageWidth - offset;
}
if (tempEnemy.y > stage.stageHeight)
{
removeEnemy(i);
lives--;
roachLevel.lives_txt.text = String(lives);
}
}
}
}
function removeEnemy(id:int)
{
removeChild(enemies[id]);
enemies.splice(id,1);
}
There is also code inside the insect.
import flash.events.MouseEvent;
import flash.display.MovieClip;
import fl.motion.Animator;
import flash.events.*;
play();
var MainTimeLine = MovieClip(root);
var mysound:squish = new squish();
this.addEventListener(MouseEvent.CLICK, kill);
this.dead = false;
function kill(e:MouseEvent):void
{
this.dead=true;
mouseChildren=false
mysound.play();
gotoAndPlay(21);
this.removeEventListener(MouseEvent.CLICK, kill);
flash.utils.setTimeout(removeSelf,2000);
}
function removeSelf():void
{
this.parent.removeChild(this);
}
You shouldn't remove an enermy from the array while iterating it.
You make enemies.splice(i,1); in your loop iterating from enemies.length to 0. While you changing your array size, you don't adjust the loop condition.
I think your main issue might be that you are reusing your insects, maybe pooling them. If you do this, you need to make sure that you are adding the eventListener for the click again when recycling.
If you are adding the listener in the constructor, that will only execute when the insect is created, not when you recycle him.
Your issue is the setTimeOut(), which is causing a memory leak. Using a timer is much safer, but if you must use it, keep a reference to the call and clear it when you no longer need it.
Also, the code you posted doesn't show where you're adding a listener to MainTimeline or parent, but if you are you need to remove that as well before the insect can be garbage collected.
Im trying to random an object(2) every time object(1).y is beyond the stage. but the problem comes that its constantly moving and sometimes its "jumps" that position where im looking to make the change.
i did try with the "if (road1.y >= stage.stageHeight) {" but it doesnt trigger.
And when I'm doing it the the speed of the movement it triggers only when it has been on the stage 2 times before.
the registration point of all MovieClips are in the TOP LEFT.
the code is this
private var road1,road4:Road1;
private var road2:Road2;
private var road3:Road3;
private var randomRoad:Sprite = new Sprite();
private var offset:Number = 0;
private var counter:Number = 0;
public function onAdded(e:Event):void {
removeEventListener(Event.ADDED_TO_STAGE,onAdded);
addChild(road1=new Road1());
addChild(randomRoad);
addChild(road4=new Road1());
addEventListener(Event.ENTER_FRAME, onEnterFrame);
}
public function onEnterFrame(e:Event):void {
if (startRandom == true) {
if (Math.random() > 0.5) {
randomRoad.addChild(road2 =new Road2());
} else {
randomRoad.addChild(road3 =new Road3());
}
startRandom = false;
trace(randomRoad);
trace(startRandom);
}
if (road1.y >= stage.stageHeight) {
startRandom = true;
trace("zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz");
}
offset += speed;
counter++;
road1.y = offset % 800 - 800;
randomRoad.y = road1.y + road1.height;
road4.y = randomRoad.y + randomRoad.height;
}
Try this:
if (road1.y >= -speed) {
startRandom = true;
trace("zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz");
}
What is the height of the stage? 800? Maybe the problem is in that road1.y will never go greater than -1;
Wouldn't it be more logical to base your spawning of an object on distance traveled? Then it wouldn't be reliant on determining the y position of a given road piece in relation to the screen.
I am going to assume you have a car in this game, since there is road. Give the car a distance variable and increment that variable based on the speed.
distance += speed;
if (distance > 400)
{
spawnObject();
distance = 0; // reset the distance traveled.
}
EDIT :
I think I may have misunderstood what you were trying to do as I thought you were trying to spawn objects on the side of the road and this was a method of determining when to spawn them. In re-reading it, it seems like the 'object' you are trying to spawn is the next road piece itself. Would have been better to just use the word road in your question as opposed to 'object(2)'
Hey guys so Basically what I'm trying to do is when my player collides with all 5 of the points MovieClips in an array and the Goal Movie Clip i want a text to appear saying "Perfect. But i cant quite accomplish this. I set up the function and it seems like it would but i think what might be wrong is the hitTest with all the Movie clips in the array.
Here is how i set it up:
This is in my loop Function:
private function gameLoop(e:Event):void
{
perfectTextFunction();
}
This is the function:
private function perfectTextFunction():void
{
if (player.hitTestObject(mcGoal_1 && points))
{
trace("perfect Text");
mcPerfect = new perfectText();
mcPerfect.x = (stage.stageWidth / 2);
mcPerfect.y = (stage.stageHeight/ 2);
stage.addChild(mcPerfect);
}
}
The Trace doesn't pick anything up.
Here is how the points are added to the stage if needed:
public function addPointsToStage():void
{
for (var i = 0; i < nPoints; i++)
{
trace(aPointsArray.length);
points = new mcGainPoints();
stage.addChild(points);
points.x = startPoint.x + (xSpacing * i);
points.y = startPoint.y - (ySpacing * i);
aPointsArray.push(points);
}
}
Please any help would be appreciated! THank you!
VESPER here is how I made the NESTED LOOP:
//If all points are hit then Perfect Hit Text
if (player.hitTestObject(mcGoal_1 || mcGoal_2))
{
var weHitAll:Boolean = true;
for (var s in aPointsArray)
{
weHitAll = weHitAll && player.hitTestObject(aPointsArray[s]);
if (!weHitAll)
break;
}
if (weHitAll)
{
trace("perfect Hit");
mcPerfect = new perfectText();
mcPerfect.x = (stage.stageWidth / 2);
mcPerfect.y = (stage.stageHeight/ 2) - 80;
stage.addChild(mcPerfect);
nScore += 25;
updateHighScore();
}
}
var weHitAll:Boolean=true;
for (var s in aPointsArray) {
weHitAll = weHitAll&&player.hitTestObject(aPointsArray[s]);
if (!weHitAll) break; // missed one, drop cycle
}
if (weHitAll) {
trace('Perfect hit!');
... // etc
}
Function hitTestObject accepts only a single object as parameter, in order to check against an array you need to iterate through it, checking against one object at a time (here it's in aPointsArray[s]).
I've got an array of sprites which I'm animating by incrementing their rotationX property. What I want is for them all to disappear once the last item in the array has come full circle. The problem is that their rotation speeds are being generated by a randomized function, so I can't just go to the end of the array to find the last one. Each time it will be a different one.
So I have an array of Sprites:
for(var i:int=0; i<arrSprites.length; i++)
{
addChild(arrSprites[i]) ;
}
Then I have my event listener:
addEventListener(Event.ENTER_FRAME, loop);
And my handler:
private function loop(e:Event):void
{
for(var i:int=0; i<arrSprites.length; i++)
{
var currentSprite:Sprite = arrSprites[i];
if(currentSprite.rotationX < 361) //this will detect the first one
//to finish but I want the last
{
currentSprite.rotationX += arrSprites[i].speed; //random speed
}
else
{
deleteTheSprites(); //removes all sprites and does other stuff
}
}
}
There's got to be an elegant way to do this. Anyone know what it is?
Thanks,
David
private function loop(e:Event):void
{
var finished : int = 0; // will count the number of sprites finished
for each (var current:Sprite in arrSprites)
{
if (current.rotationX < 361) current.rotationX += current.speed;
else if (++finished == arrSprites.length) deleteTheSprites(); // executes only if all sprites have finished
}
}