Animated presentation navigation by arrows - AS3 - actionscript-3

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.

Related

Action script 3 walking animation

i need some help. im trying to make my character walk both direction(left and right) and an idle animation when standing still. i manage to make the character walk to the right and make the idle animation work. now if I copy the code from the right button to the left button, the walking animation gets stuck in the first frame on both direction. I tried to experiment with it but with no luck. im sorry if i sounded noob. i just started with studying programming.
here are the code that i used
RightBtn.addEventListener(MouseEvent.MOUSE_DOWN, mouseDown);
function mouseDown(e:MouseEvent): void {
if(RightBtn){
isRight = true;
}
}
RightBtn.addEventListener(MouseEvent.MOUSE_UP, mouseUp);
function mouseUp(e:MouseEvent): void {
if(RightBtn){
isRight = false;
}
}
stage.addEventListener(Event.ENTER_FRAME, loop);
function loop(Event){
if(isRight==true && mcPlayer.x < 750){
mcPlayer.x += 7;
mcPlayer.gotoAndStop (2);
mcPlayer.walkR.play ();
}
else{
mcPlayer.gotoAndStop (1)
mcPlayer.Idle.play ();
}
}
LeftBtn.addEventListener(MouseEvent.MOUSE_DOWN, mouseDown2);
function mouseDown2(e:MouseEvent): void {
if(LeftBtn){
isLeft = true;
}
}
LeftBtn.addEventListener(MouseEvent.MOUSE_UP, mouseUp2);
function mouseUp2(e:MouseEvent): void {
if(LeftBtn){
isLeft = false;
}
}
stage.addEventListener(Event.ENTER_FRAME, loop2);
function loop2(Event){
if(isLeft==true && mcPlayer.x > 65){
mcPlayer.x -= 7;
mcPlayer.gotoAndStop (3);
mcPlayer.walkL.play ();
}
else{
mcPlayer.gotoAndStop (1)
mcPlayer.Idle.play ();
}
}
That's what you get from blatant copy&paste without learning the mechanics of how does it internally work. You set two listeners to stage, both altering mcPlayer regardless of whether it was already altered by the other one. So, you need to write both sets of code in one listener, and walk the code with your pen and paper to ensure that both isRight==true and isLeft==true branches work separately and don't interfere with each other. The proper condition statement should be like this:
if (isRight==true && mcPlayer.x < 750) {
// do a step right
} else if (isLeft==true && mcPlayer.x > 65){
// do a step left
} else {
// do idle animation
}
Your codes of initiating animation are correct themselves, they just get overridden by the listeners that are unaware of some other code altering mcPlayer.

Flash CS3 AS3 Movieclips carrying over to other frames

OK so I am having a weird issue. I have some movieclips on screen, 4 of them, each with the following code (with different instance names of course):
stage.addEventListener(MouseEvent.MOUSE_DOWN,globalMouseDown,false,0,true); //add a global mouse listener
function globalMouseDown(e:Event):void {
//find out if the target is a descendant of this, if not, then something else was clicked.
var parent:DisplayObject = e.target as DisplayObject;
while(parent && parent != stage){
if(parent == this) return;
parent = parent.parent;
}
//something else was clicked that wasn't this, so go to the up state
gotoAndStop(1);
}
stop();
addEventListener(MouseEvent.MOUSE_DOWN, onHs1Press);
addEventListener(MouseEvent.MOUSE_OVER, onHs1Over);
addEventListener(MouseEvent.MOUSE_OUT, onHs1Out);
function onHs1Press(event:MouseEvent):void
{
// toggle between frame 1 and 3 on button press
gotoAndStop(this.currentFrame == 3 ? 1 : 3);
parent.addChild(this)
}
function onHs1Over(event:MouseEvent):void
{
if (currentFrame != 3)
{
gotoAndStop(2);
}
}
function onHs1Out(event:MouseEvent):void
{
// only switch back to UP state if the button is "pressed"
if (currentFrame != 3)
{
gotoAndStop(1);
}
}
Basically it lets you hover your mouse and the movieclip changes and then when you click on it a little pop up window appears until you click the movieclip again to close it.
There is also a button on screen that allows you to move forward or backwards to other frames with this code:
Next.addEventListener(MouseEvent.CLICK,Nclick);
function Nclick(event:MouseEvent):void {
nextFrame();
}
Back.addEventListener(MouseEvent.CLICK,Bclick);
function Bclick(event:MouseEvent):void {
prevFrame();
}
The button code is on the main timeline and the movieclip code is on the movieclip's timeline.
For some reason if you have the movieclip in the DOWN state (with the popup window open) and you click the button to go to the next frame, the movieclip follows onto the next and any other frames instead of just going away.
I have this same code present on other frames and none of the other ones behave this way, it's really weird.
You can even click it still when its on the other frames and bring up the popup window where the movieclip and code aren't even present.
What's going on with it?
I tried testing this, and could reproduce your issue. If you add a movieclip to the stage in FlashPro, after changing it's index or parentage, it will from that point on be treated like an object created from code and the timeline will ignore it and even create another instance of it on a frame where it is created.
You'll have to manually remove the buttons from the display list.
function Nclick(event:MouseEvent):void {
nextFrame();
removeBtns();
}
function Bclick(event:MouseEvent):void {
prevFrame();
removeBtns();
}
function removeBtns():void {
if(currentFrame != 2){ //whatever the frame of your buttons is
if(btn1 && btn1.parent) removeChild(btn1); //btn1 being whatever your button instnace name is
if(btn2 && btn2.parent) removeChild(btn2); //repeat for all buttons
}
}
OR If you'd prefer to have encapsulated code, instead of the above, put this on your button class/timeline:
var myFrame:int = MovieClip(parent).currentFrame;
this.addEventListener(Event.ENTER_FRAME,enterFrameHandler);
this.addEventListener(Event.REMOVED_FROM_STAGE,removedHandler);
function enterFrameHandler(e:Event):void {
if(MovieClip(parent).currentFrame != myFrame){
parent.removeChild(this);
}
}
function removedHandler(e:Event):void {
this.removeEventListener(Event.ENTER_FRAME, enterFrameHandler);
this.removeEventListener(Event.REMOVED_FROM_STAGE, removedHandler);
}

flash as3 hitdetection function triggering other function

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();
}
}

Action Script 3: Problems with gotoAndStop() after a Movie Clip

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.

In Flash Actionscript 3.0 how do I create smooth keyboard controls for player movement?

I am a beginner in Flash Actionscript 3.0 programming. I am trying to create smooth keyboard controls for player movement in a game.
I'm currently using addEventListener(KeyboardEvent.KEY_DOWN) listening for a keyboard key press and then within the handler function moving a graphic by adding a number to its .x or .y property.
This creates a slow, sluggish jerk at the beginning. I know there's a smoother, more responsive way to do this but have no idea where to begin. Any help would be appreciated!
For smooth keys I would suggest using either a Timer or onEnterFrame to poll for keys often enough to get smooth controls. It will get the job done, but at a certain expense. If you've got the rest of the logic all fine, this should fit in ok:
var key:int = NaN;
stage.addEventListener(KeyboardEvent.KEY_DOWN, onKeyPress,false,0,true);
stage.addEventListener(KeyboardEvent.KEY_UP, onKeyRelease,false,0,true);
this.addEventListener(Event.ENTER_FRAME,update,false,0,true);
function onKeyPress(event:KeyboardEvent):void {
key = event.keyCode;
event.stopPropagation();
}
function onKeyRelease(event:KeyboardEvent):void {
key = NaN;
event.stopPropagation();
}
function update(event:Event):void{
if(key) trace(key);
}
I make sure the event doesn't bubble by stopping it's propagation, and it's set on the stage which should be the topmost level, event wise. Also I'm using the key only the key is down, otherwise I ignore it in the enterFrame handler.
HTH,
George
Where are you placing the listener? Is it in the application, or in the sprite that is supposed to move? Does the sprite have the focus when you are pressing the key?
Also, in adding the event listener, are you using capture? That is, are you setting the 3rd argument to true, as in
addEventListener(KeyboardEvent.KEY_DOWN, yourHandler, true)
If you use capture, which is how you have to do it if the App itself is listening for the event, then you will get a certain amount of latency, and this latency will be greater the more complex the interface is. If those events have to work their way up a vast hierarchy, this could be noticeable. If there are many sprites, this can exacerbate the problem.
What you can do is have the sprite that has the focus dispatch a custom event which a controller class listens to for each sprite. The controller class will have a handler that moves the event.currentTarget however you plan to have it done.
Also read up about custom events and how to use the SystemManager to add and remove listeners dynamically: http://livedocs.adobe.com/flex/3/langref/index.html.
the most simplest example to this would be this.
here you have a controllable Ship class(Ship.as).
import flash.display.MovieClip;
import flash.events.KeyboardEvent;
import flash.events.Event;
public class Ship extends MovieClip {
private var speedX;
private var speedY;
public function Ship() {
//constructor
stage.addEventListener(KeyboardEvent.KEY_DOWN ,keyDown);
stage.addEventListener(KeyboardEvent.KEY_UP ,keyUp);
stage.addEventListener(Event.ENTER_FRAME, update);
}
public function keyDown(e:KeyboardEvent) {
if(e.keyCode == 37) {
speedX = -5;
}
if(e.keyCode == 38) {
speedY = -5;
}
if(e.keyCode == 39) {
speedX = 5;
}
if(e.keyCode == 40) {
speedY = 5;
}
}
public function keyUp(e:KeyboardEvent) {
if(e.keyCode == 37 || e.keyCode == 39) {
speedX = 0;
}
if(e.keyCode == 38 || e.keyCode == 40) {
speedY = 0;
}
}
public function update(e:Event) {
x += speedX;
y += speedY;
}
}