Multiple hittest AS3 - actionscript-3

I have a draggable movieclip on my stage. When it hits another object/movieclip the word: "hit" appears. So far, so good. But, I want the draggable movieclip to hit multiple other objects with each an different reaction (like loading an other movieclip or something).
This is the code I have for the hittest part:
import flash.events.Event;
this.addEventListener( Event.ENTER_FRAME, handleCollision)
function handleCollision( e:Event ):void
{
if(blok3.hitTestObject(schaap))
{
output_txt.text = "HIT"
}
else
{
output_txt.text = ""
}
}
SCHAAP is the draggable object, blok3 is the object that trigger the word "hit" when the draggable object hits it.
I hope you guys can help me out!

You already have a trigger and an output for one collision (if blok3 htis schaap, output "HIT") so a simple extension would be to add another if statement below the existing:
function handleCollision( e:Event ):void
{
if(blok3.hitTestObject(schaap))
{
output_txt.text = "HIT"
}
// else if statement to check for collision on second object
else if(differentBlok.hitTestObject(schaap))
{
output_txt.text = "SMASH"
}
else
{
output_txt.text = ""
}
}
From here you can look at storing objects in arrays and looping through the array to check for a collision, rather than having a separate if statement for every one.

Related

Collision Detection hitTestObject not working.. ish

Obviously as you can see from this clip below, the Hit and Miss is not corresponding to the actual event on the stage. why? It works only if I give the objects instance name, but not working when using the var name. why?
here's the code:
import flash.events.Event;
var gball: SmallGreenBall1_T = new SmallGreenBall1_T();
var bucket: allBuckets = new allBuckets();
this.addEventListener(Event.ENTER_FRAME, handleCollision)
function handleCollision(evt: Event): void {
if (gball.hitTestObject(bucket)) {
output_txt.text = "HIT"
} else {
output_txt.text = "MISS"
}
}
https://www.youtube.com/watch?v=rL4N5Abokf0[Hit and Miss is not corresponding to the actual event on the stage][1]
Problem solved. Rookie mistake, I needed to addChild the object not preposition them on stage.

Dragging movie clips in Action Script 3

Hi so recently I have been attempting to Drag a movie clip in AS3 but I'm having some trouble picking up with the hit tests anyone got any ideas? Just to clarify, the issue is that when the movieclips hit the drag test object, they're not executing the gotoframe() function.
initDrag() adds action listeners:
MOUSE_DOWN on the object
MOUSE_UP on the stage so it doesn’t matter if you are off the object
endDrag() removes the action listeners; call this (for each object) before you go to another frame
startADrag()create a rectangle within which the object can be dragged (in this case the stage)
call startDrag() on the object
stopADrag() call stopDrag() on the object from currentObject (but only if currentObject is not null).
var currentObject:MovieClip = null;
initDrag(block1);
initDrag(block2);
initDrag(block3);
initDrag(block4);
function initDrag(obj:MovieClip )
{
obj.addEventListener(MouseEvent.MOUSE_DOWN,startADrag);
stage.addEventListener(MouseEvent.MOUSE_UP,stopADrag);
}
function endDrag(obj:MovieClip )
{
obj.removeEventListener(MouseEvent.MOUSE_DOWN,startADrag);
stage.removeEventListener(MouseEvent.MOUSE_UP,stopADrag);
}
function startADrag(e:MouseEvent):void
{
currentObject = (MovieClip)(e.target);
var rect:Rectangle = new Rectangle(0,0,stage.stageWidth - currentObject.width,stage.stageHeight - currentObject.height + 100);
currentObject.startDrag(false,rect);
}
function stopADrag(e:MouseEvent):void
{
if (currentObject != null)
{
currentObject.stopDrag();
}
}
if(block1.hitTestObject(dragtest)){
gotoAndStop("lose");
}
if(block2.hitTestObject(dragtest)){
gotoAndStop(27);
}
if(block3.hitTestObject( dragtest)){
gotoAndStop("lose");
}
if(block4.hitTestObject( dragtest)){
gotoAndStop("lose");
}
thanks for any advice or answers.
The following code should work as expected. The problem is, as i already stated in my comment, that your calls to hitTestObject(obj) only get executed once, at the very beginning of your application. What you need to do though is to check it constantly.
Think about it, if your calls to hitTestObject-calls only get executed once at the beginning, when you didn't even have a chance to drag one of your objects, it will always return false, right? Because your objects are still in their initial position (outside of the dragtest objecti must assume).
With an event listener for Event.ENTER_FRAME you check it once per frame instead. So even if all the results for hitTestObject are false, it will check them all again on the next frame (if you are currently dragging, controlled through a simple boolean called dragging).
var currentObject:MovieClip = null;
var dragging:Boolean = false;
initDrag(block1);
initDrag(block2);
initDrag(block3);
initDrag(block4);
addEventListener(Event.ENTER_FRAME, checkForHit);
function checkForHit(e:Event):void{
if(dragging){
if(block1.hitTestObject(dragtest)){
gotoAndStop("lose");
}
if(block2.hitTestObject(dragtest)){
gotoAndStop(27);
}
if(block3.hitTestObject( dragtest)){
gotoAndStop("lose");
}
if(block4.hitTestObject( dragtest)){
gotoAndStop("lose");
}
}
}
function initDrag(obj:MovieClip )
{
obj.addEventListener(MouseEvent.MOUSE_DOWN,startADrag);
stage.addEventListener(MouseEvent.MOUSE_UP,stopADrag);
}
function endDrag(obj:MovieClip )
{
obj.removeEventListener(MouseEvent.MOUSE_DOWN,startADrag);
stage.removeEventListener(MouseEvent.MOUSE_UP,stopADrag);
}
function startADrag(e:MouseEvent):void
{
currentObject = (MovieClip)(e.target);
var rect:Rectangle = new Rectangle(0,0,stage.stageWidth - currentObject.width,stage.stageHeight - currentObject.height + 100);
currentObject.startDrag(false,rect);
dragging = true;
}
function stopADrag(e:MouseEvent):void
{
if (currentObject != null)
{
currentObject.stopDrag();
dragging = false;
}
}

EventListener AS3 problems reset problems

Hey guys I am having a problem with Event Listeners in my AS3 file. I am trying to make this object that lasts for 83 frames to appear in a different location every time the parent (83 frame) movie clip resets. The problem is I have a function that places the object at a random y value which works great once. When it resets the ojbect appears on the same Y point. This is because I removeEventListener the function otherwise the object goes shooting off the screen when it loads. How do I call that event listener again without causing a loop that will shoot the object off screen?
Here is my code:
import flash.events.Event;
stop();
addEventListener(Event.ENTER_FRAME, SeaWeedPostion);
//stage.addEventListener(Event.ADDED_TO_STAGE, SeaWeedPostion);
function SeaWeedPostion(e:Event):void{
// if(newSeaWeed == 1) {
var randUint:uint = uint(Math.random() *500 + 50);
this.seaweedSet.y += randUint;
trace(randUint);
stopPos();
//}else{
//nothing
// }
}
function stopPos():void{
removeEventListener(Event.ENTER_FRAME, SeaWeedPostion);
//var newSeaWeed = 0;
}
function resetSeaWeed():void{
addEventListener(Event.ENTER_FRAME, SeaWeedPostion);
}
I have some // code in there from trying different things.
Anyone have any suggestions?
Thanks!
ENTER_FRAME event is triggered every frame, so rather than changing position on each frame maybe it's better to create a counter, count frames and if it reaches 82 change position of SeaWeed.
var counter:uint = 0;
Now add ENTER_FRAME listener
addEventListener(Event.ENTER_FRAME, onEnterFrame);
function SeaWeedPostion(e:Event):void {
counter++;
//Are we there yet?
if(counter < 83) {
//Nope, carry on
}
else {
//Yey!
changePosition();
counter = 0;
}
}
//Reset SeaWeed position when called
function changePosition() {
var randUint:uint = uint(Math.random() *500 + 50);
this.seaweedSet.y += randUint;
trace(randUint);
}

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.

AS3 function running before variables are defined!

I am trying to add an init() function to a MovieClip, but when I run the function from scene1 the variables that were set in the MovieClip are not defined yet... The MovieClip was dragged to the stage from the library.
scene1:
mc.init(null);
MovieClip:
var _default = 5;
function init(num) {
if(num == null) {
trace(_default);
} else {
trace(num);
}
}
This is tracing "undefined" instead of "5"; Is there a way of fixing this problem?
The problem is that any code thats placed directly in the main timeline will always run before the code thats directly in the MovieClip.
The way to get around this would be to let flash finish running that code in both timeline and the MovieClip first, and then call the function from the timeline after its done.
The easiest way to do this would be to use an event listener:
Timeline:
addEventListener( Event.ENTER_FRAME, onEnterFrame );
function onEnterFrame( e:Event ):void {
myObject.init(null);
removeEventListener( Event.ENTER_FRAME, onEnterFrame );
}
That way the timeline will wait until the first frame has started to call the init function of your MovieClip.