I have a movie clip (enemy) inside the enemy i have 3 frames for iddle, attack and run.The enemies are inside Array.What is the better way to cache as bitmap the enemy and movie clips inside the enemy?
var greengoblinVelocity: int = 0;
var e: int;
for (e = numChildren - 1; e >= 0; e--)
{
var childdE: DisplayObject = getChildAt(e);
if (childdE.name.indexOf("enemy") > -1)
{
GreenGoblinArray.push(MovieClip(childdE));
MovieClip(childdE).hitPoints = 2;
MovieClip(childdE).currentX = 0;
MovieClip(childdE).startAttack = 0;
}
}
stage.addEventListener(Event.ENTER_FRAME, gameloop);
function gameloop(event: Event): void
{
for (var enl = 0; enl < GreenGoblinArray.length; enl++)
{
var enemy: Enemy = GreenGoblinArray[enl] as Enemy;
}
}
CacheAsBitmap and cacheAsBitmapMatirx always sucked. There are few areas where you want to do it instead of just simply drawing to a bitmap. What render mode are you using? Thats important
Related
I'm making an AS3 platform game where the player can shoot some bullets.
When the bullet is touching an enemy, the enemy die and the bullet is removed.
I've succeed do to that but now I'd like to remove the bullet if it hit a wall and I can't figure out how to do so.
So far, here's my code for removing the bullet when touching an enemy :
public function checkCollisions() {
// enemies
for(var i:int=enemies.length-1;i>=0;i--) {
if (hero.mc.hitTestObject(enemies[i].mc)) {
// is the hero jumping down onto the enemy?
if (hero.inAir && (hero.dy > 0)) {
enemyDie(i);
} else {
heroDie();
}
}
for (var j:int = 0; j < bulletList.length; j++) // for each bullet in the bulletList
{
if (enemies[i].mc.hitTestObject(bulletList[j]) )
{
trace("Bullet and Enemy are colliding");
enemyDie(i)
bulletList[j].removeSelf();
}
}
}
I've defined my wall and floor like this :
public function examineLevel() {
fixedObjects = new Array();
otherObjects = new Array();
for(var i:int=0;i<this.gamelevel.numChildren;i++) {
var mc = this.gamelevel.getChildAt(i);
// add floors and walls to fixedObjects
if ((mc is Floor) || (mc is Wall)) {
var floorObject:Object = new Object();
floorObject.mc = mc;
floorObject.leftside = mc.x;
floorObject.rightside = mc.x+mc.width;
floorObject.topside = mc.y;
floorObject.bottomside = mc.y+mc.height;
fixedObjects.push(floorObject);
}
}
I've tried to put this in my checkCollisions function but it's not working :
for(var k:int=0;k<fixedObjects.length;k++)
{
if (fixedObjects[k].hitTestObject(bulletList[j]) ){
trace("hit wall");
}
Do you know what do I have to put in order to remove the bullet when it's touching a wall (or floor) ?
Thx
The array fixedObjects holds references to Object instances. However, hitTestObject(obj) is a public function of the DisplayObject class, and the obj parameter needs to be an instance of DisplayObject.
If the code snippet you provided is exactly the same as what you used in your game, there should be runtime error messages generated.
Could you please verify whether this is the cause of failing to detect collision?
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'm working on a platform game in AS3 for Flash. There is of course a player character and enemies for him to interact with. I first made a simple placeholder graphic for the enemy while I worked on the code. I got the enemy to move back and forth between two bumpers with code. He also collides with the player, sending them back to the start screen. Now that I got the code working, I wanted to add some animations to the enemies so they walk instead of just skate across the ground. I added the animations to the timeline of the enemy movie clip. Now when I test the game, the animations play fine and the enemy begins to move, but he passes through the first bumper and doesn't collide with the player at all. If I force the movie clip to stop and not play the collision starts to work again. What would be causing this?
This is the code within the main timeline of the .fla file.
addEnemiesToLevel1();
addBumpersToLevel1();
function addEnemiesToLevel1():void
{
addEnemy(700, -54);
addEnemy(1341, -54);
addEnemy(2187, -54);
}
function addBumpersToLevel1():void
{
addBumper(900, -80);
addBumper(644, -80);
addBumper(1135, -90);
addBumper(1380, -90);
addBumper(2053, -90);
addBumper(2226, -90);
}
function addEnemy(xLocation:int, yLocation:int):void
{
var enemy:Enemy = new Enemy(xLocation, yLocation);
back.addChild(enemy);
enemy.addEventListener(Event.REMOVED, enemyRemoved);
enemyList.push(enemy);
}
function addBumper(xLocation:int, yLocation:int):void
{
var bumper:Bumper = new Bumper(xLocation, yLocation);
back.addChild(bumper);
bumper.visible = false;
bumperList.push(bumper);
}
//corralling the bad guys with bumpers
if (enemyList.length > 0){ //enemies left in the enemyList?
for (var k:int = 0; k < enemyList.length; k++){ // for each enemy in the enemyList
if (bumperList.length > 0){
for (var h:int = 0; h < bumperList.length; h++){ // for each bumper in the List
if ( enemyList[k].hitTestObject(bumperList[h]) ){
enemyList[k].changeDirection();
}
}
}
}
}
//player and enemy collisions
if (enemyList.length > 0){ //enemies left?
for (var m:int = 0; m < enemyList.length; m++){ // for each enemy in the enemyList
if ( enemyList[m].hitTestObject(player) ){
trace("player collided with enemy");
gotoAndStop(4);
enemyList[m].removeSelf();
}
}
}
}
This is the enemy class file.
package {
import flash.display.MovieClip;
import flash.events.Event;public class Enemy extends MovieClip {
private var xSpeedConst:int = 2;
private var flip:int = 1;
public function Enemy(xLocation:int, yLocation:int) {
// constructor code
x = xLocation;
y = yLocation;
addEventListener(Event.ENTER_FRAME, loop);
}
public function loop(e:Event):void {
if ((flip%2) == 1){
x += xSpeedConst;
} else if((flip%2) == 0){
x += (-xSpeedConst);
}
}
public function removeSelf():void {
trace("remove enemy");
removeEventListener(Event.ENTER_FRAME, loop);
this.parent.removeChild(this);
}
public function changeDirection():void{
trace("x ="+x);
flip++;
this.scaleX *= -1;
}
}
}
I had a problem that was very similar to this:
2D Platform Game using hitTestPoint:glitches
My problem was that my character's hitTestPoint wouldn't work after I animated the character. However, it wasn't because of the animation, it was because of my turning code for the character. I was using scaleX to flip the character. However, this flipped the points nested within the character as well (which were used to handle my collisions). I notice that you also flipped the character's scale:
public function changeDirection():void{
trace("x ="+x);
flip++;
this.scaleX *= -1;
}
Perhaps you are having the same problem as I did. If so, try removing this line of code for now:
this.scaleX *= -1;
...and see what happens...We can figure out what to do next from there
Drake Swartzy
hey :S I`m trying to make 2 things so far but neither work :(
The 1st is to make an Row of 5 Ships that position them selves from the top to left.Then add an Event to make them move down.
But every time i try to make a new Row of 5 new ships ... they position themselves after the last ship from the previous Row.I did think of a way to fix that by waiting the 1st Row of ships to go beyond the stage and then remove them from the stage and splice from the Array but ... when I increase the speed of spawning (when i have 2 rows with 5 ships on the stage or more)that does't work.
And the second error I think is from that fact .... that I have 2 rows at the same time on the stage.
ArgumentError: Error #2025: The supplied DisplayObject must be a child of the caller.
at flash.display::DisplayObjectContainer/removeChild()
at MainClass/doShips()
at MainClass/everyFrame()
I dont know what exactly to paste from the code so i had to push everything in the MainClass of the FLA.fail :D but i did it neatly! so if anyone helped me he would track the code easily
so its a simple FLA.fail with 4 MC and in those 4 MC there is no code
a Bullet
a Ship with colour Yellow
a Ship2 with colour Green so i can see the randomising
and a Player with the class Turret
so the MainClass of the FLA is :
package {
import flash.display.MovieClip;
import flash.events.Event;
import flash.events.MouseEvent;
public class MainClass extends MovieClip {
protected var mouseSpeed:Number = 20;
protected var _thePlayer:Turret = new Turret();
protected var shipCount:Number;
protected var shipCount2:Number;
protected var shipArray:Array = new Array();
protected var counter:int = 0;
//variables for bullets
private var shootCooldown:Number = 0; //speed of the fire
private var firing:Boolean = false;//bullets triger
private var numToShoot:int = 1; //bullets
const MAX_COOLDOWN = 10; //bullets timer
protected var _bulletsArray:Array = new Array();
public function MainClass() {
_thePlayer.x = stage.stageWidth/2
_thePlayer.y = stage.stageHeight - _thePlayer.height/2
addChild(_thePlayer)
addEventListener(Event.ENTER_FRAME, everyFrame)
stage.addEventListener(MouseEvent.MOUSE_DOWN, startFire);
stage.addEventListener(MouseEvent.MOUSE_UP, stopFire);
}
private function startFire(ev:MouseEvent) {
firing = true;
}
private function stopFire(ev:MouseEvent) {
firing = false;
}
//every frame do this
protected function everyFrame(ev:Event):void{
//Moving The Turret
moveTheTurret();
//increase the counter every frame
counter++;
if(counter % 70 == 0){
//position the ships on the stage
positionShips();
}
//handle the ships when they are added on the stage
doShips();
//when to fire
updateFire();
//handle the bullets
doBullets();
}
//Moving The Turret
protected function moveTheTurret() {
if (mouseX > _thePlayer.x +15) {
_thePlayer.x += mouseSpeed;
} else if (mouseX < _thePlayer.x - 15) {
_thePlayer.x -= mouseSpeed;
} else {
_thePlayer.x = mouseX;
}
}
//createShips and position them
protected function positionShips() {
shipCount = 3;
shipCount2 = 2;
var gap = 10;
for (var i:int = 0; i < shipCount; i++) {
var s = new Ship();
shipArray.push(s);
}
for (var j:int = 0; j < shipCount2; j++) {
s = new Ship2();
shipArray.push(s);
}
var array:Array=new Array();
while (shipArray.length>0) {
var index:uint = Math.floor(Math.random() * shipArray.length);
array.push(shipArray[index]);
shipArray.splice(index,1);
}
shipArray = array;
//shipsArray has been randomized
for (var k:int = shipArray.length - 1; k >= 0; k--) {
addChild(shipArray[k]);
shipArray[k].x = shipArray[k].width/2 + (shipArray[k].width * k) + (gap*k);
}
}
//move the ships
protected function doShips() {
for (var i:int = shipArray.length - 1; i >= 0; i--) {
shipArray[i].y +=3 //make the Ships fall down
for (var bcount= _bulletsArray.length-1; bcount >= 0; bcount--) {
//if the bullet is touching the ship
if (shipArray[i].hitTestObject(_bulletsArray[bcount])) {
//if we get here it means there`s is a collision
removeChild(_bulletsArray[bcount]);
_bulletsArray.splice(bcount,1);
removeChild(shipArray[i]);
_bulletsArray.splice(i,1);
}
}
//if it gets over 380 remove from stage and splice from the array
if(shipArray[i].y > 380){ // stage.stageHeight)
removeChild(shipArray[i]);
shipArray.splice(i,1);
}
}
}
//when to fire
public function updateFire() {
//if we are currently holding the mouse down
if(firing == true){
fire();
}
//reduce the cooldown by 1 every frame
shootCooldown--;
}
//Shoot bullets
private function fire() {
if (shootCooldown <= 0) {
//reset the cooldown
shootCooldown = MAX_COOLDOWN
for (var i=0; i<numToShoot; i++){
//spown a bullet
var b = new Bullet();
//set the rotation of the bullet
b.rotation = -90
b.x = _thePlayer.x;
b.y = _thePlayer.y;
//add the bullet to the list/Array of _bulletsArray
_bulletsArray.push(b);
//add the bullet to the perent object;
addChild(b);
}
}
}
//handling the bullets
protected function doBullets(){
//make a for loop to iterate all the _bulletsArray on the screen
for (var bcount:int = _bulletsArray.length-1; bcount>=0; bcount--) {
//make the bullets move Up
_bulletsArray[bcount].y -=20;
//if the bullet is beyond the screen remove from the stage and the Array
if(_bulletsArray[bcount].y < 0){
removeChild(_bulletsArray[bcount])
_bulletsArray.splice(bcount,1);
}
}
}
}
}
I dont know how to fix neither of the 2 problems.Would be very thankful for any help!!!
Thanks in advance.
I'm trying to create a virtual life simulation, where when a boy fish and a girl fish collide they reproduce. This is my first time using external class files and I'm quite confused.
package {
import flash.display.MovieClip;
import flash.events.Event;
public class Main extends MovieClip
{
var numBalls:Number = 3;
var bFishList:Array = new Array();
var gFishList:Array = new Array();
public static var bFish:BoyFish = new BoyFish ;
public static var gFish:GirlFish = new GirlFish ;
var fishName:Object = bFish.name;
public function Main()
{
addEventListener(Event.ADDED_TO_STAGE, enterFrameNow);
function enterFrameNow(event:Event):void {
// constructor code
for (var i = 0; i < numBalls; i++) {
var bFish:MovieClip = new BoyFish();
bFish.name = "bFish"+i;
addChild(bFish);
//variable ball a movieclip is a new instance of Ball
var gFish:MovieClip = new GirlFish();
// ball x and y value was in the middle of the stage
bFish.x = stage.stageWidth / 2;
bFish.y = stage.stageHeight / 2;
// add ball to stage
bFishList.push(bFish);
// ball x and y value was in the middle of the stage
gFish.x = stage.stageWidth / 2;
gFish.y = stage.stageHeight / 2;
// add ball to stage
addChild(gFish);
gFishList.push(gFish);
addEventListener(Event.ENTER_FRAME, hitTest);
function hitTest(event:Event):void {
for (i = 0; i < bFishList.length; i++) {
if (gFish.hitTestObject(bFishList[i]) == true) {
addChild(gFish);
gFishList.push(gFish);
trace("hit");
}
}
}
}
}
trace(bFishList);
trace(gFishList);
}
}
}
Here's the code from my Main.as file. I've tried for so long with the hitTestObject thing, and it's just not working for me.
Can anyone help me? I want it to add another instance to the stage when a bFish and a gFish collide.
You shouldn't add that many enterFrame events.
Add just one enterFrame handler, in your class, not as a local function, and add a nested loop into it.
//Somewhere in your Main() function :
addEventListener(Event.ENTER_FRAME, this.hitTest);
//In class Main
public function hitTest(event:Event):void
{
for (var i = 0; i < bFishList.length; i++)
{
for (var j = 0; j < gFishList.length; j++)
{
if (gFishList[j].hitTestObject(bFishList[i]))
{
var newFish:MovieClip = new GirlFish(); //Create it.
addChild(newFish);
gFishList.push(newFish);
}
}
}
}
Please note that if you aren't doing any more action, that could result of the creation of many girl fish each frame, which could eventually freeze the flashplayer.