Currently got text off stage that I would like to come onto the stage and stop at a certain position (97, 233.10) on my stage. I'm a little confused on where to stop it and what code to use?
addEventListener(Event.ENTER_FRAME, mcInfo);
function mcInfo (e:Event):void {
//check position of logo
//if inside the stage move left to right
//if outside stage reposition
if (info.x<stage.stageWidth) {
info.x+=30;
stop();
} else {
//reset position
info.x=-450;
}
}
Cheers!
It also seems that Flash is now returning an output error when I scroll through the rest of my pages:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at finaldesign_fla::MainTimeline/mcInfo()
In the if statement we check if the object has exceeded the target position and stop the loop if it has. Otherwise keep incrementing the object's position.
targetPosition = {x:97, y:233.10};
addEventListener(Event.ENTER_FRAME, mcInfo);
function mcInfo(e:Event) {
if (info.x >= targetPosition.x) {
info.x = targetPosition.x;
removeEventListener(Event.ENTER_FRAME, mcInfo);
} else {
info.x += 30;
}
}
make sure that info is on stage and try add:
if(info != null && stage != null)
Related
So I have a scene which is an options menu; in the scene I have a volume slider; it works fine (I can slide it and the volume would go down/up), but when I leave the scene, it gives me an error (only happens if I play with the slider):
TypeError: Error #1009: Cannot access a property or method of a null object reference.
And it points at:
var myVolume:Number=V_Slider.V_Knob.x/mySliderLength;
and when I re-enter, the volume slider goes back to its original position. I'm very new to Flash and AS3, so any help I can get is very much appreciated.
Here is the code for the volume slider:
var dragging:Boolean=false;
var mySliderLength:uint=240;
var boundingBox:Rectangle=new Rectangle(0,0,mySliderLength,0);
V_Slider.V_Knob.addEventListener(MouseEvent.MOUSE_DOWN, dragKnob);
stage.addEventListener(MouseEvent.MOUSE_UP, releaseKnob);
V_Slider.V_Knob.buttonMode=true;
function dragKnob(myEvent:Event):void {
V_Slider.V_Knob.startDrag(false, boundingBox);
dragging=true;
V_Slider.V_Knob.addEventListener(Event.ENTER_FRAME, adjustVolume);
}
function releaseKnob(myEvent:Event):void {
if (dragging) {
V_Slider.V_Knob.stopDrag();
dragging=false;
}
}
function adjustVolume(myEvent:Event):void {
var myVolume:Number=V_Slider.V_Knob.x/mySliderLength;
var myTransform:SoundTransform=new SoundTransform(myVolume);
if (BGM_SC!=null) {
BGM_SC.soundTransform=myTransform;
}
}
It is a common problem man you can look for that. When u change you scene you need to remove your Events and when you come back to that scene u need to add them again. In this case you u can use this
function workEvents(action:String):void
{
if(action == "add")
{
V_Slider.V_Knob.addEventListener(MouseEvent.MOUSE_DOWN, dragKnob);
stage.addEventListener(MouseEvent.MOUSE_UP, releaseKnob);
}
else
{
V_Slider.V_Knob.removeEventListener(MouseEvent.MOUSE_DOWN, dragKnob);
stage.removeEventListener(MouseEvent.MOUSE_UP, releaseKnob);
}
}
when u use that gotoAndStop/gotoAndPlay(1,"Scene 2");
also use this: workEvents("rm");
this will remove your events and that problem should end :)
I hope it helps :))
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 have a question about action script 3.
I am making a game, the basic rule of the game is:
an object falls from the top
the hero(user) has to avoid the object
if the object hits the ground or the hero: the hero dies or the object falls again from the top.
I am using the add child method for the object, and timer function for the fall.
the problem is:
when the object hits the ground, the function does not loop. it ends just like that. so there wont be any falling objects anymore.
please help me. thanks :)
stage.addEventListener(Event.ENTER_FRAME, addfire1);
function addfire1(e:Event):void
{
if (api1==false)//if object is not on the stage
{
randomx = randomRange();//generate random X
addChild(api);
api.x = randomx;//set x
api1 = true;//object is now on stage
}
if (api.hitTestObject(hero) || api.hitTestObject(ground))
{
falltimer.stop();
//stop timer;
falltimer.reset();
//reset fall Count to zero ;
removeChild(api);//object removed
api1=false;
}
}
function firefall(Event:TimerEvent):void
{
if (api1)
{
api.y += 20;//set speed y
}
}
Just separate the two cases: hero and floor.
if (api.hitTestObject(hero))
{
falltimer.stop();
//stop timer;
falltimer.reset();
//reset fall Count to zero ;
removeChild(api);//object removed
api1=false;
}
else if (api.hitTestObject(ground))
{
//reset object's position
api.y = -20;
}
Assuming there is only one object falling at the time I'd not remove the object but instead just move it to the original y position and a new x position. And instead of having the timer i'd create an update-function that runs every time you enter a frame.
stage.addEventListener(Event.ENTER_FRAME, update);
private function update(e:Event):void
{
if(!api1) //if object is not on the stage (same as api1==false)
{
addfire1();
}
if(api1) //if object if on stage (same as api1==true)
{
firefall();
}
}
private function addfire1(e:Event):void
{
randomx = randomRange();//generate random X
addChild(api);
api.x = randomx;//set x
api1 = true;//object is now on stage
if (api.hitTestObject(hero))
{
hitHero(); //execute what should happen to the hero when the he is hit
resetFire();
}
else if(api.hitTestObject(ground))
{
resetFire();
}
}
private function firefall(Event:TimerEvent):void
{
api.y += 20;//set speed y
}
private function resetFire():void
{
api.x = randomRange();
api.y = 0;
}
If you write it like this you don't have to mix stuff up. Try to keep everything seperated, one function does one thing. If you are making a big game try to seperate everything in classes.
Hopefully this fixes the problem and makes it easier for you to finish the game :)
I have a working drag and drop game, but it's not perfect. All my movieclips drag and drop to their targets when you are exactly lined up with the target.
However, if you let go of the mouse up when dragging the mc outside of the target zones, it will sometimes, but not always, throw the 1010 term undefined error and will not snap the mc back to its original start x/y coordinates (it just leaves the mc in the spot it was during mouse up). I ran the debugger and it deals with this line in my drop function:
if (event.currentTarget.dropTarget != null && MovieClip(event.currentTarget.dropTarget.parent).allowed.indexOf(event.currentTarget) >= 0){
FYI, allowed is a set of target arrays since I wanted "zones" for targets and not specific targets for some of the movieclips.
Any ideas?
Updated Code Below:
if (event.currentTarget.dropTarget != null) {
var mc:MovieClip=event.currentTarget.dropTarget as MovieClip;
if (mc==null) { // typecast fails. Say there's a Sprite below
reply_txt.textColor = 0xEE1212
reply_txt.text = "Oops! Try Again!";
event.currentTarget.alpha = 1;
event.currentTarget.x = startX;
event.currentTarget.y = startY;
return; // nothing to do here
}
mc=mc.parent;
if (mc && mc.allowed) {
// this MC has "allowed" property not "undefined" - we're in the grid
// so now we can check indexOf() safely
if (mc.allowed.indexOf(event.currentTarget)>=0){
reply_txt.textColor = 0x33BC10
reply_txt.text = "Good Job!";
event.currentTarget.alpha = 1;
event.currentTarget.removeEventListener(MouseEvent.MOUSE_DOWN, pickUp);
event.currentTarget.removeEventListener(MouseEvent.MOUSE_UP, dropIt);
event.currentTarget.buttonMode = false;
event.currentTarget.x = MovieClip(event.currentTarget.dropTarget.parent).x;
event.currentTarget.y = MovieClip(event.currentTarget.dropTarget.parent).y;
stored.push(event.currentTarget);
startXarray.push(startX);
startYarray.push(startY);
counter++;
}
}
}
Yes, when you stopDrag an object, it checks what kind of a DisplayObject is below the cursor, and that one is returned as dropTarget property in your event. So, if your object is dropped onto another MC that does not have allowed property, your 1010 error is thrown. You need to check this situation in a nested if statement like this:
if (event.currentTarget.dropTarget != null) {
var mc:MovieClip=event.currentTarget.dropTarget as MovieClip;
if (mc==null) { // typecast fails. Say there's a Sprite below
returnThisBack();
return; // nothing to do here
}
mc=mc.parent;
if (mc && mc.allowed) {
// this MC has "allowed" property not "undefined" - we're in the grid
// so now we can check indexOf() safely
if (mc.allowed.indexOf(event.currentTarget)>=0) snapThisToGrid();
} else returnThisBack();
} else returnThisBack();
I have items in an array, each is a movieclip, which play at delayed intervals of 1 second and a target movieclip (carTarget) controlled by arrow keys where the aim is to avoid a collision with the array items (obstacleArray[i]). I have been attempting to create a hitTestObject statement to notify when there is a collision. However I have received errors such as parameter hitTestObject most be non-null and cannot figure out how to resolve it.
//obstacles
function randomSort(a:*, b:*):Number
{
if (Math.random() < 0.5) return -1;
else return 1;
}
var obstacleArray:Array = [obstacleCar,obstacleCar2,obstacleCar3];
obstacleArray.sort(randomSort);
trace(obstacleArray);
trace(obstacleArray.length);
//OBSTACLE START DELAY
var timerPlay:Timer = new Timer(1000,1);
timerPlay.addEventListener(TimerEvent.TIMER, ontimerPlay);
timerPlay.start();
var i:int = 0;
var timerDelay:Timer = new Timer(1000, 3);
function ontimerPlay(evt:TimerEvent):void{
obstacleArray[i].addEventListener(Event.ENTER_FRAME,checkHitTest);
//FOR EACH OBSTACLE
timerDelay.addEventListener(TimerEvent.TIMER, ontimerDelay);
timerDelay.start();
}
function checkHitTest(event:Event):void{
if(carTarget.hitTestObject(obstacleArray[i]))
{
trace("HIT!");
}
}
function ontimerDelay(evt:TimerEvent):void{
obstacleArray[i].play();
trace(obstacleArray[i]);
i++;
}
Most likely, the problem is in this block of code:
function checkHitTest(event:Event):void{
if(carTarget.hitTestObject(obstacleArray[i]))
{
trace("HIT!");
}
}
After i changes with the timer calls, then obstacleArray[i] will be null or worse - another object other than the one you need to check.
You should change this to:
function checkHitTest(event:Event):void{
if(carTarget.hitTestObject(event.target))
{
trace("HIT!");
}
}
event.target will get the current obstacle calling the checkHitTest from Enterframe event
It is very likely that hitTestObject does not exist at the moment you're trying to use it. From the code you shared, I do not see where you create it in your code. So, assuming carTarget is an object on the stage and that it has the property or object hitTestObject initialized when you want to use it -assuming those things, then you need to make sure that when this code is running, that object still exists.