currently i have a game in which i am try to play a sound when ever the player presses the arrow key to moves the car which is handled by an enter-frame function, but what ends up happening is that the sound is started again over and over and playing over each other as long as the key is held down eventually crashing the game. Below is the code i am using to play/stop the sound as well as the code for the enter-frame function (animate).
function sounds(): void
{
if (forwardPressed == true)
{
carMoveSound.play(pausePos);
trace('play sound');
return;
}
if (forwardPressed == false)
{
SoundMixer.stopAll();
trace('stop sound');
return;
}
}
function animate(e: Event)
{
moveCar();
checkHitBoundry();
checkHitObstacle();
checkLapFinish();
sounds();
if (gameOver)
{
endGame();
return;
}
}
Any help would be greatly appreciated.
Related
I can't figure out why when I try and get my player to jump diagonally by pressing the right and up arrow key it does nothing, I've used trace to see if anything was happening and nothing was when they were used together.
Up won't work by itself or with right but when right is by itself it works.
player is named hero, platforms are named platform, platform2, platform3 etc
platforms are in the platform layer
stop();
var gravity:Number=5; //Very important, allows player to fall
var movex:Number=0; // Moving players X
// Moving player
stage.addEventListener(KeyboardEvent.KEY_DOWN, moveHero);
var speed=10;
function moveHero(event:KeyboardEvent) {
if (event.keyCode==Keyboard.LEFT) {
hero.x-=speed;
hero.play();
}
if (event.keyCode==Keyboard.RIGHT) {
hero.x+=speed;
hero.play();
}
}
hero.addEventListener(Event.ENTER_FRAME, testCollision2);
// Allowing player to jump when on platform
function testCollision2(e: Event) {
//Allowing player to jump when on platform continued
stage.addEventListener(KeyboardEvent.KEY_DOWN, moveHeroUP);
function moveHeroUP(event:KeyboardEvent) {
if (hero.hitTestObject(platform) && event.keyCode==Keyboard.UP) {
gravity=-50;
hero.y=hero.y+gravity;
} else if (hero.hitTestObject(platform2) && event.keyCode==Keyboard.UP) {
gravity=-50;
hero.y=hero.y+gravity;
} else if (hero.hitTestObject(platform4) && event.keyCode==Keyboard.UP) {
gravity=-50;
hero.y=hero.y+gravity;
}
if(hero.hitTestObject(platform) && event.keyCode==Keyboard.UP && event.keyCode==Keyboard.RIGHT){
movex = 20;
hero.x = hero.x + movex;
gravity =-50;
hero.y = hero.y + gravity;
}
}
I'm trying to get the player to jump in the code chunk at the very end
Flash CS4
AS3
To start, let's go through how you've set up this code and explain what's happening.
You have this line:
hero.addEventListener(Event.ENTER_FRAME, testCollision2);
Which is saying, every frame tick that hero exists, run the function testCollision2. Frame tick here doesn't relate to timeline frames, it relates to the frame rate of your application. So if that is set to 12, that function will run 12 times every second.
Inside testCollision2, you add another listener:
stage.addEventListener(KeyboardEvent.KEY_DOWN, moveHeroUP);
and create an inline function called moveHeroUP. So every frame tick, you create a new function, and attach it to a key down event. So (assuming 12 frames per second) 5 seconds into your application, you'll have 60 keyboard listeners all doing the same thing. This is also a memory leak (as you keep creating a new function every frame), so eventually your program will crash.
To get to the actual question, a keyboard event is tied to one specific key. This means the event's keyCode is only ever one key (the key that triggered the event). So doing something like (event.keyCode==Keyboard.UP && event.keyCode==Keyboard.RIGHT) will always be false because event.keyCode only ever holds one value.
A common approach to your situation, is to have one global key down and key up listener. Then use a dictionary to store which keys are currently down:
//create just one key down listener
stage.addEventListener(KeyboardEvent.KEY_DOWN, keyDownHandler);
stage.addEventListener(KeyboardEvent.KEY_UP, keyUpHandler);
//create a dictionary to store key presses
var keyboardDown:Dictionary = new Dictionary();
function keyDownHandler(e:KeyboardEvent):void {
keyboardDown[e.keyCode] = true;
}
function keyUpHandler(e:KeyboardEvent):void {
keyboardDown[e.keyCode] = false;
}
What you're doing here, is when a key down event fires, you set the value in the dictionary to true (with the keycode as the dictionary key), then on the key up event you set it to false.
Now, in your ENTER_FRAME handler, you use the dictionary values to check for key combinations:
hero.addEventListener(Event.ENTER_FRAME, moveHero);
function moveHero(event:Event) {
//DO ALL YOUR MOVEMENTS IN ONE ENTER FRAME FUNCTION
if (keyboardDown[Keyboard.LEFT]) {
hero.x-=speed;
hero.play();
}
if (keyboardDown[Keyboard.RIGHT]) {
hero.x+=speed;
hero.play();
}
if (hero.hitTestObject(platform) && keyboardDown[Keyboard.UP]) {
gravity=-50;
hero.y=hero.y+gravity;
} else if (hero.hitTestObject(platform2) && keyboardDown[Keyboard.UP]) {
gravity=-50;
hero.y=hero.y+gravity;
} else if (hero.hitTestObject(platform4) && keyboardDown[Keyboard.UP]) {
gravity=-50;
hero.y=hero.y+gravity;
}
if(hero.hitTestObject(platform) && keyboardDown[Keyboard.UP] && keyboardDown[Keyboard.RIGHT]){
movex = 20;
hero.x = hero.x + movex;
gravity =-50;
hero.y = hero.y + gravity;
}
}
I am trying to code a script in which a movieclip drops a rope and catches fishes that follows it up if it touches it. here is the issue , i am using hitTestObject to detect collision . Ofcourse the problem is that i trigger the function when it touches but as soon as it doesnt touch the function for moving the movie starts so basically the fish goes up for few seconds and then starts moving straight again .
To try and fix that i tried to make a boolean variable which changes to true or false according to hit and accordingly makes the movieclip moves but also doesnt work because as soon as one mc is not touching the other it changes from true to false or 1 to 0 ..tried both (as in with boolean variable and Number variable) . Any help or putting me on the right direction would be highly appreciated . Thank you so much
// fish capture code
this.addEventListener(Event.ENTER_FRAME,handleCollision);
function handleCollision(e:Event):void
{
if (ropeHit.hitTestObject(fishy_1_a))
{
stopFish1();
trace(movefish1);
}
else
{
moveFish1();
}
}
//code enemy fishy
//fish 1 A
function moveFish1()
{
if (fishy_1_a.x < 800)
{
fishy_1_a.x += xSpeed;
}
else if (fishy_1_a.x >= 800)
{
fishy_1_a.x = -100;
}
}
function stopFish1()
{
fishy_1_a.y -= xSpeed;
}
Define some flag, that you can test:
function handleCollision(e:Event):void {
//Check if fishy is caught
if (!fishy_1_a.catched && ropeHit.hitTestObject(fishy_1_a)) {
//Change flag
fishy_1_a.catched = true;
trace("Gotcha!");
}
if (fishy_1_a.catched) {
stopFish1();
}else {
moveFish1();
}
}
I'm new to AS3 and although I was looking for a solution to my problem truly long time, I was not successful. I have an animated presentation and I just want to make navigation through that by arrows. Everything is on the main timeline. In the first frame I made this code
var zpet: Number;
if (currentFrame == 1) {
zpet = 1;
}
stage.addEventListener(KeyboardEvent.KEY_DOWN, posun);
function posun(event: KeyboardEvent): void {
if (event.keyCode == 37) {
addEventListener(Event.ENTER_FRAME, playReverse);
function playReverse(event: Event): void {
if (currentFrame == zpet) {
stopPlayReverse();
} else {
prevFrame();
}
}
function stopPlayReverse(): void {
if (hasEventListener(Event.ENTER_FRAME)) {
removeEventListener(Event.ENTER_FRAME, playReverse);
}
}
} else if (event.keyCode == 39) {
if (currentFrame < totalFrames - 1) {
play();
} else {
stop();
}
}
}
stop();
Moving forward works perfect as I put stop(); in every keyframe of the presentation. The problem is how to go back just to the previous keyframe (and I also want to go back in reverse playing). I thought it would be quite easy if I made a variable (called "zpet") and set it the specific number of frame where to go back in each keyframe. But it doesn't work, all the time it's going back to frame 1. For example I put in the frame 26 the code zpet = 13; that should say when playing back from the frame 26 stop at the frame 13. Any ideas how to solve this? I would be really grateful for that..
You can label each keyframe of your animation anything you want directly from the timeline and then something like this :
function playReverse(event: Event): void
{
prevFrame();// You can also use gotoAndStop(currentFrame - 1)
if(currentFrameLabel != null)
stopPlayReverse();
}
Looks cleaner imo, plus you can use labels value later in case you make a scene selection menu.
Upon the click of a button, an animation starts. Then the program directs you to a certain frame when the animation is done.
Is this possible?
So this is what I've got so far: a Movie Clip movQuizIntro and a Button btnBond in Frame 1.
stop()
movQuizIntro.stop()
btnBond.addEventListener(MouseEvent.CLICK, BondQuiz)
btnReg.addEventListener(MouseEvent.CLICK, Registrering)
function BondQuiz (evt:MouseEvent)
{
if (currentFrame == 1)
{
movQuizIntro.alpha = 1
movQuizIntro.play()
}
}
What is the code and proper syntax you need to write in order to go to frame 2 after the animation is done?
`
stop();
movQuizIntro.stop();
int frameCounter=0;
btnBond.addEventListener(MouseEvent.CLICK, BondQuiz);
btnReg.addEventListener(MouseEvent.CLICK, Registrering);
function BondQuiz (evt:MouseEvent)
{
if (currentFrame == 1)
{
movQuizIntro.alpha = 1
movQuizIntro.play()
movQuizIntro.addEventListener(EventType.ENTER_FRAME, onEnterFrame);
}
}
// event handler function, runs every enter frame
private function onEnterFrame(event:Event):Void
{
frameCounter++;
if(frameCounter > movQuizIntro.totalFrames)
{
//Place code here because you know the MovieClip finished playings
//Go to desired frame
}
}
`
I wrote this code outside of an editor nor did I get to compile, so the gist is there and may have some minor errors.
NOTE:This is just a quick way of doing this. If you want something more reusable/cleaner then you would want to consider subclassing or alternate Object Oriented tricks.
In button event handler:
function onClick(e:MouseEvent):void{
ANIMATION_MC.addEventListener(Event.EXIT_FRAME, onFromeExit);
}
function onFrameExit(e:Event):void {
if (ANIMATION_MC.currentFrame == SOME_FRAME) {
ANIMATION_MC.removeEventListener(Event.EXIT_FRAME, onFromeExit);
TARGET.gotoAndPlay(NEW_FRAME);
}
}
And you can just use addFrameScript on ANIMATION_MC too.
Well the problem is that I'm having troubles with the fighter in my game. If I use the KEY_DOWN event and/or ENTER_FRAME, when I hold down the kick or punch button the fighter continuously causes damage to the enemy but I want him either to, for example kick and then return to still position or kick and be able to hold the position but only cause the damage one time. Here's some code:
stage.addEventListener(KeyboardEvent.KEY_DOWN, enterAttack);
stage.addEventListener(KeyboardEvent.KEY_UP, exitAttack);
stage.addEventListener(Event.ENTER_FRAME, attackYes);
stage.addEventListener(Event.EXIT_FRAME, attackNo);
function enterAttack(evt:KeyboardEvent):void
{
if (evt.keyCode == 84)
{
attack = true;
}
}
function exitAttack(evt:KeyboardEvent):void
{
attack = false;
}
function attackYes(evt:Event):void
{
if (attack)
{
hero.gotoAndStop("punch1");
checkHitRed();
checkIfDead();
}
}
function attackNo(evt:Event):void
{
if (!attack)
{
hero.gotoAndStop("still");
}
}
I was trying to remove the listener somewhere but that always made it look like the fighter didn't do any attack.
Is there any way to prevent holding down kick/punch button?
Any help is appreciated
You have to devise cooldowns for your abilities, e.g. "kick" can happen only once per 20 frames. So, when the player presses kick button, char does a kick, does damage, and sets the cooldown variable. Enter frame listener starts to decrement the counter, and subsequent kick commands are ignored while the cooldown is active.
stage.addEventListener(KeyboardEvent.KEY_DOWN, enterAttack);
stage.addEventListener(Event.ENTER_FRAME, enterFrame);
var kickCooldown:int=0;
function enterAttack(evt:KeyboardEvent):void
{
if (evt.keyCode == 84)
{
if (!kickCooldown) {
attack = true;
kickCooldown=15;
}
}
}
function enterFrame(evt:Event):void
{
if (attack)
{
hero.gotoAndStop("punch1");
attack=false; // we have attacked once, now dealing damage
checkHitRed();
checkIfDead();
}
if (kickCooldown>0) kickCooldown--; // waiting for cooldown end
else hero.gotoAndStop("still"); // if ends, return hero to "still" posture
}
Character state, divide into three types. As follows.
stage.addEventListener(KeyboardEvent.KEY_DOWN, enterAttack);
stage.addEventListener(KeyboardEvent.KEY_UP, exitAttack);
stage.addEventListener(Event.ENTER_FRAME, onAction);
var characterState:String = "wait"
function enterAttack(evt:KeyboardEvent):void
{
if (evt.keyCode == 84)
{
characterState = "attack";
}
}
function exitAttack(evt:KeyboardEvent):void
{
characterState = "attack_ended";
}
function onAction(evt:Event):void
{
if(characterState == "wait") return;
if(characterState == "attack")
{
hero.gotoAndStop("punch1");
checkHitRed();
checkIfDead();
}
else if(characterState == "attack_ended")
{
hero.gotoAndStop("still");
//Revert to wait state after the attack termination .
characterState = "wait";
}
}