Dynamically Know What Display Object You Hit Test
Hi,
I have a bit of a hit test puzzle.
In my main movie I have 2 movie clips A and B.
Both A and B have movieClips inside them of type "clip"(defined by me).
Also in my main movie I have a bar movieClip that scrolls vertically through my movie.
Im trying to find a way to get the "bar" movie clip to tell me when it hits a movie clip of type "clip" that is inside either A or B.
Any ideas at all?
ActionScript.org Forums > ActionScript Forums Group > ActionScript 3.0
Posted on: 03-20-2008, 07:29 PM
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Hit Test Object Problem
Hi i have problems with hit test object. If mc moves in straight line it works ok but if it is not in a straight line i get hit detection too soon. Even before two objects collide. Any ideas what is the problem? Or how to get arround it or how to fix it?
I have attached examples of both files.
tnx
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Hit Test Any Object On Stage
If i am preforming a hit test on a object can the hit test be configured to do something if the object hits any other object on stage?
if (MC.hitTestObject(Object)){
do something
}
I've tried using * as well that don't work had search around can't find anything can anyone help?
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ok, im trying to write a '3d' engine where there are 3 shapes (squares) that are draggable. the less the y value, the smaller they get (perspective..) anyway, is there an actionscript pre made function to test what 'layer' the clips are on? i'm planning on using swapDepths to switch em around.. and it would make my life easier if i could easily tell if the clips are over or under each other.
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Test Whether Function Is Defined In Object?
Is there a way to test whether an object has a function defined?
I have a function that checks whether a requested Loader has finished loading. If it hasn't, it stores the loader in a temporary variable, and adds a listener to the loader.
When the load completes, the listener triggers a second function that places the loader content on the stage and activates a function in the loader content.
Problem is, when the swf is compiled this temporary variable is empty (since the loader hasn't been requested yet), and I get a "1061 Call to possibly undefined method" error from the second function. Which hasn't actually been called yet, just defined.
Can I do something like:
if (exists(loader.content.functionName)) {
// run the function
}
Or some other syntax - is_defined(), != 'undefined', etc. - what's the correct way to check whether a function is defined/exists?
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Trouble Implementing A Hit Test Object
Hi,
OK, Im trying to build an accordian-type menu from scratch.
I have a main class, a menu item class, and on each menu button is a movieclip of a "tab".
Im most of the way there, just trying to get each menu item to stop when it hits a tab of another menu button.
Im trying to use hitTestObject, but getting errors. Essentially Im having trouble talking with the tabs of the individual menu items- i think this is perhaps because i created the menu items from an array in the constructor function and can't access them now...
Im essentially looking for the code that will say "stop moving when you hit any other tab on the stage". Here is the code when I create the menu items and also where Im having trouble.
Thanks for any ideas...
ActionScript Code:
package
{
import blah blah blah
public class Accordian extends Sprite
{
public var a:Array = new Array;
public var menuNum:uint = 5;
public var tabWidth:int = 22;
public var tabX:int = 0;
public function Accordian()
{
for (var i:uint = 0; i < menuNum; i++)
{
a[i] = new MenuItem;
a[i].x = tabX;
addChild(a[i]);
a[i].addEventListener(MouseEvent.MOUSE_DOWN, checkLoc);
tabX += tabWidth;
}
}
// trouble code - how do i talk to the menu tabs (a child of MenuItem)?
private function moveRight(clicked:Event):void
{
var movingBtn = clicked.target;
movingBtn.x += 10;
if ( movingBtn.x >= stage.stageWidth - tabWidth || movingBtn.hitTestObject(MenuItem.tabby))
{
movingBtn.removeEventListener(Event.ENTER_FRAME, moveRight);
}
}
}
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Hi
I am attempting to make a little flash game and have run into some problems with the hit test.
I have a wall and when the ship hits the wall, the ship bounces back, so for that I used this code
onClipEvent (enterFrame) {
while (this.hitTest(_root.shuttle.hitarea)) {
_root.shuttle._x = _root.shuttle._x+120;
but this only works for one side of the wall, so I have 4 hit areas set up all using the same code as above but with the +120 being -120 and changing to the y value for the top and bottom.
This works ok but it has afew glitches, for instance, the left side of thw wall holds up ok but the right side seems to let the ship pass straight through fairly easily. so heres my questions.
Is there a way that I can just use one code for the entire object instead of 4 hit areas and 4 bits of code ?
failing that can anyone take a look at the fla attached and see why the right side of the wall fails after a few hits ?
even if somebody could point me in the right direction that would be great
Any help would be appreciated ..
Thanks
Sig
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I'm creating a script to let the user draw a series of rectangles on the screen, which I need to load into subsequent movie clip instances so that I can track the width/height, etc. and then erase them when they go to another frame and then test to see if they exist and redraw them when they return to the frame.
I've got the following code working, but it creates all the squares in one clip and it works great if you only draw one square. It will let you draw multiple squares, but it puts them all into one mc instance, which screws up the redraw because it sees everything as one square. I also attached the fla file since the code is so long and it is easier to understand if you see it working.
Code:
//if the user moves the cursor within the indicated area, this instantiates the empty clip
if ((_xmouse<790 && _xmouse>150) && (_ymouse<560 && _ymouse>80)) {
this.createEmptyMovieClip("canvas_mc", this.getNextHighestDepth());
var mouseListener:Object = new Object();
}
//these are the variables to track the position of the square
var origX:Number;
var origY:Number;
var modX:Number;
var modY:Number;
var modW:Number;
var modH:Number;
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*/
mouseListener.onMouseDown = function() {
if ((_xmouse<790 && _xmouse>150) && (_ymouse<560 && _ymouse>80)) {
this.isDrawing = true;
this.orig_x = _xmouse;
this.orig_y = _ymouse;
origX = _xmouse;
origY = _ymouse;
this.target_mc = canvas_mc.createEmptyMovieClip("", canvas_mc.getNextHighestDepth());
}
};
//if the user is within the indicated area, this draws the square
mouseListener.onMouseMove = function() {
if (this.isDrawing) {
if ((_xmouse<790 && _xmouse>150) && (_ymouse<560 && _ymouse>80)) {
this.target_mc.clear();
this.target_mc.lineStyle(2, 0xFF0000, 100);
this.target_mc.moveTo(this.orig_x, this.orig_y);
this.target_mc.lineTo(_xmouse, this.orig_y);
this.target_mc.lineTo(_xmouse, _ymouse);
this.target_mc.lineTo(this.orig_x, _ymouse);
this.target_mc.lineTo(this.orig_x, this.orig_y);
}
}
};
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mouseListener.onMouseUp = function() {
if ((_xmouse<790 && _xmouse>150) && (_ymouse<560 && _ymouse>80)) {
/*next few lines capture position of the upper left corner of the square
* no matter where the user starts drawing the square
*/
modX = origX;
modY = origY;
modW = canvas_mc._width;
modH = canvas_mc._height;
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modX = origX-canvas_mc._width;
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}
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Mouse.removeListener(mouseListener);
}
};
Mouse.addListener(mouseListener);
if ((_xmouse>790 && _xmouse<150) && (_ymouse>560 && _ymouse<80)) {
this.isDrawing = false;
Mouse.removeListener(mouseListener);
}
//function to stop drawing and clear the square
clearThreats_mc.onRelease = function() {
removeMovieClip("canvas_mc");
};
//function to redraw the square based on upper left corner and height & width
show_mc.onRelease = function() {
trace(modX+", "+modY+" / "+modW+", "+modH);
this.target_mc = canvas_mc.createEmptyMovieClip("", canvas_mc.getNextHighestDepth());
this.target_mc.lineStyle(2, 0xFF0000, 100);
this.target_mc.moveTo(modX, modY);
this.target_mc.lineTo((modX+modW), modY);
this.target_mc.lineTo((modX+modW), (modY+modH));
this.target_mc.lineTo(modX, (modY+modH));
this.target_mc.lineTo(modX, modY);
canvas_mc._visible = true;
};
Also, I'd like to (ideally) turn this into a class, but I'm not sure how to go about that, what needs to go into the class, what needs to stay in the movie, etc. I've used and modified classes before, but I've never converted a working function/group of scripts into a class.
Thanks!!
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I'm trying to add a tween event to external images that I load.
The images load just fine and the tween action work.
However the tween only works on the last item loaded.
when i trace my display list it lokk like this
[object MainTimeline] root1
[object MovieClip] level1
[object Loader] temp1
[object Loader] temp2
[object Loader] temp3
[object Loader] tempt1
[object Loader] tempt2
[object Loader] tempt3
As you can see i have named my loader instances.
how do i reference the individual images loaded by the same object loader
the tween ask for object as the first parameter.
any help would be appreciated
thanks
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Display Order OR Target Through Object?
I am encountering a hassle that seems to beg a couple of solution types.
I am working on an inventory system where the user can drag various icons around a grid. One feature is that if the user drops an item on top of another item- the dropped on item would become attached to the mouse pointer. This works- sort of.
My problem is that if the object on the mouse pointer is higher in Z than the object it is over- the ocluded object doesn't recognize the mouse event.
My first glance at controlling Z looks like a major hassle! Everything on my screen has a position in Z, or the display list- whatever. Can I really not say objectName.z = 5; or whatever??? If I could do this I could just drop the Z of the object when it gets picked up and bump it back up when it is dropped. This would allow it to be under the other icons while on the mouse.
OR
Is there a way to let the mouse event penetrate to all layers of Z? Like, be able to click through an object?
Thanks,
T
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Trying To Move Display Object Using 'while' Loop
I'm trying to write a simple title screen sequence that will play at the beginning of a simple game I'm writing.
I have a class called NumberTile2 (a square, basically, with a number in it).
I want to place one of these tiles near the top of the stage and have it slowly descend to the bottom of the stage. (Eventually I'll want several of these appearing and falling to the bottom one after the other but for the moment, to demonstrate the problem I'm having, I'm keeping it to just one tile).
I'm using an event listener which moves the tile down one pixel every frame, and a while loop which keeps running all the time the tile has not yet reached its final resting place.
I'm sure this is not the most elegant way of doing things but I'm interested in finding out why it doesn't work. It's obviously highlighting something fundamental that I'm not understanding about how Flash works.
When I test the movie I get Error 1502: A script has executed for longer than the default timeout period of 15 seconds. Behind that, I get a tile moving down the stage but never stopping and disappearing off the bottom(?!)
If anybody can tell me where I'm going wrong I'd be very grateful.
Thank You for reading this.
Here's my code:
Code:
package
{
import flash.display.*;
import flash.events.*;
public class TitleScreen2 extends MovieClip
{
var nextTile:NumberTile2; // the tile we're currently putting in place
var tilePlaced:Boolean; // flag that tells us when tile has reached the bottom
public function TitleScreen2(container:DisplayObjectContainer) // constructor
{
// create a new tile and place it near the top of the stage
nextTile = new NumberTile2();
nextTile.x = 25;
nextTile.y = 25;
container.addChild(nextTile);
// add event listener which will move tile down each frame
nextTile.addEventListener(Event.ENTER_FRAME, moveDown);
// put tile in place
placeNextTile();
} // end constructor
private function placeNextTile()
{
tilePlaced = false;
while(tilePlaced==false)
{
if(nextTile.y == 150) // if tile is now in place
{
nextTile.removeEventListener(Event.ENTER_FRAME, moveDown); // remove event listener for this tile
tilePlaced = true; // set flag equal to true
}
} // end while
} // end placeNextTile
private function moveDown(e:Event)
{
// move tile down 1 pixel
nextTile.y += 1;
} // end moveDown
} // end class
} // end package
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