Actionscript 3.0 :: Collision Test With Multiple Objects
Dec 3, 2009
I'm having a problem with a hitTest that I'm not sure how to correct. Long story short, I have a box that is added to the stage and beings to tween down to the bottom. If the user presses the left arrow to catch the object before it leaves the stage, they get 1 point (hooray!).The issue that I'm having is this...multiple instances of the same MC are supposed to be added to the stage by a timer but because of how I've set it up, they all have the same instance name. That leaves me with one of 2 options. I can get the hit test to work, but only 1 instance ever actually shows up or a bunch show up, but the hitTest fails. How can i add multiple instances of the same object, but still be able to determine if one of them is overlapping the box when the user hits the arrow key?[code]
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Jun 13, 2010
I want to detect collision for several different objects, but want to keep the code as short as possible. whether I can use an array to hold the different movieclips and then detect collision with the entire array, or if I have to create a class and do it that way.
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Nov 27, 2011
I'm trying to create a sort of tree diagram such that, if you click on one of the circles, its child circles spread outward with some degree of randomness from the original circle, connected by lines. I have this working, but now what I want to do is make sure that none of the circles collide with each other and none of the lines criss cross. You can see the screenshot for what is currently happening. My code is below. How do I change this code so that it checks for collisions and avoids them? I've read up on flash's hitTestObject command, but that only works in the context one object to another. I want to test for one object contacting any display object.
import com.greensock.TweenMax;
var sw = stage.stageWidth;
var sh = stage.stageHeight;
[Code].....
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Jan 4, 2011
I'm actually working on a multiple collision detection in actionscript 3.0, using pixel collision for a game for my assignment, where an enemy patrols around and searching for the hero. So, i draw a line between the enemy and the hero, to check whether there's some collision happened between those two. if the line colllides with an obstacle such as wall, door, etc. enemy will not be able to see the hero. When i tried a single line collision with a wall (one object only) it works perfectly.
But here's the problem. For the multiple objects collision (several walls and doors included), i added those objects in an arraylist, When i used for loop to check the collision between the line and those objects in the arraylist, none seems to react , except the first object in the arraylist or index 0.
Is there any simpler way to do the multiple collision detection?
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Jul 20, 2010
How to set hit test for multiple objects..?
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Jun 20, 2011
a way, to manage a multiple collision detection with pixel level detection, for objects, not necessarily circles, irregular objects.
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Jun 7, 2010
I would like to drag and drop multiple objects and on collision activate/play a video clip.
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Jun 21, 2010
Im currently working on a demo flash game built on AS 2.0. im a very beginner to this flash and AS and im stuck up with a very silly concept though im not able to overcome it. the problem i have is with collision detection ie hit test and im really struggling with it.
[Code]....
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Jan 8, 2009
I have a ball in a page and a stopwatch.
The stopwatch works fine starts on page ready.The ball moves using the arrow keys.
But i am just wondering how can I create some kind of boundary, (which will be the size of the page) which when the ball collides with it or goes out of the page the stopwatch will stop?[code]...
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Jan 17, 2012
Is there a way to test collision with a child of an object?eg.
ActionScript Code:
obj1.hitTestObject(obj2.childObj1)
obj1 and obj2 are on the same level of hierarchy.
I am trying to test when an object collides with a particular location of another object so i made a 1x1 movieclip (childObj1) and placed it inside obj2 at that particular position.
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Mar 13, 2008
I'm making a map creator for a tabletop game. The idea is that the map creator would consist of a 48x48 grid and would allow people to drag items onto that grid and save the positional layout of objects like trees and buildings.So I'm working on the very first steps of this and have written the script so far to dynamicaly generate a 48x48 grid and created a test object to be dragged called "follow".
The dynamicaly generated MC draws from the "grid" MC from the library which consists of two layers; the outline of a box and an MC named "grid_bg" which contains a coloured square (set to the same size as the outline). This is all placed into the "container" MC which by default is empty.This part I get working fine.the "follow" mc is set so that it can be dragged on a mouse click.Now the idea is that if a hitTest is run to see if "follow" is in contact with any of the "grid_bg" MC's and if so, run code (i.e. hide or show the grid_bg mc).
This is where I am encountering problems. If I set the hitTest into a layer within the "grid" MC, it only runs the hit test when the movie is first loaded and ignores you dragging and dropping the "follow" mc. If the hitTest is placed into the actions of the "grid_bg" MC and used in conjuction with an IF statement, it seems to act like there is a collision on every box generated.Code to generate the grid:
Code:
//make textboxes
count=2304;
[code].....
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Oct 27, 2006
it's easy to test collision between two squares. how do I test the collision if they are rotated?
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Oct 4, 2002
how i can get these lasers to work in the correct manner. For some reason, 2-3 seconds in the game, the game goes to the next frame. I can't get the second player's fire to stick with him as he travels across the screen. Here's the fla.
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Jan 16, 2012
I'm having a little problem with collision detection. I'm currently with very simple game, where the only thing that is off is the collision.I tried with hittestobject and (as I found) it checks for the outer layer (my objects are a circle, and a weird star), so this method was of no use to me. Then I tried with hittestpoint, and I found that it checks for the center of the objects, so game over happens only where the center of an enemy touch the center of my character.I know that I must have something missing and I found a lot of guides but all of them were with squares or with static objects
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Sep 16, 2009
I have Object "A" that moves around and collides with other objects. There are hundreds of other different objects it can collide with. The only way (I found) to test for collision is to loop through every other object. That seems rather inefficient considering I don't even know how many objects exists. Other objects are constantly created and deleted. So this loop would be rather complicated.Is there a way for object A to receive what other object it collided with so that I can then do some code on that other object. Any way to avoid looping? I later need to find out how to detect what objects are near (within x pixels or so) of object A to decide with which one to interact. Maybe that could also be used now to limit the test of collision? Or maybe it gives someone an idea of what to try?
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Sep 15, 2010
I'm starting with actionscript 2 and I can't figure out how I set a collision mask for enemies and characters. I've got birds that flap their wings but I only want the player to collide with the body, not with the wings, as they take up too much space and it would be unfair.
I tried mc.setMask and other things I found online, but somehow it didn't work, ie: did nothing. I think I don't get the way this works. I thought you'd need like an invisible rectangle that it checks collisions against instead of the actual animation.
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Dec 27, 2010
[Code]...
I have a serious problem with Action Script. I'm about to code a new Jump&Run game with a simple gravitation Engine. And this is where I got my problem I can not solve! When moving the player through the levels, I want to move the layers instead of him. So the player stays somehow where he is but the enemies, ground, items ... move around - as in most of these games. The gravitation is intendet to affect every item/enemy (by ENTER_FRAME) and moves every object downwards until it hits the ground.
The problem is, objects of different Layers somehow don't get the right hitTest information. So when having two objects - the first on the same layer as the ground, moving both, everything is fine. But as soon as I put the object into a separate container like "itemsContainer:MovieClip" and I move that, the object doesn't get the right result for hitTestPoints. (Maybe it has something to do with localToGlobal??)
[Code]...
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May 10, 2011
I am creating a scheduling application that shows projects (wrapped within a canvas) on a 2 week calendar timeline.If the user decides to move a project over by a day, i need to check and see if the moving project would then overlap with any other existing projects. If it does, one of the two projects would need to move down the screen along the y axis until the two projects no longer overlap.I've created a function that loops through a repeater item which is used to create the projects... the end result of this function is an arrayCollection that holds:
0. the id number within the repeater
1. the project title
2. x coordinate
3. y coordinate
4. the width of the project
5. the height of the project
I have also created a function that takes the two objects within the array collection and determines if they're overlapping.I can not, however, figure out a working loop that goes through the array collection, compares each item within it, checks to see if they overlap, moves the project if they do overlap, and then continues onto the next project.
Also, I need to make sure that moving one project will not make it overlap with another.I ended up having to reset each elements y value to 0 each time any project is moved and then re-evaluating whether or not they collide.
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Dec 29, 2011
I have been trying to fix my collision handling for hours now, but it seems like I am running in circles. To be blunt, my collision handling sucks. It is easy to break, and hardly works on complex objects(like water in my case, see the test at megaswf . com / serve / 1577272)
For collision detection I am using the collision detection kit, or CDK.My level is made up of different large MCs, such as a "wall" MC containing all of the smaller walls, such as water, a tree, or a wall. CDK allows me to hittest the single walls by hittesting the large one, and not each one individually, making it easier for myself.My code has a lot of repetition(8 directional movement), so I will put a "//..." to simplify.
Main.as:
ActionScript Code:
public class Main extends MovieClip[code]......
I have literally been working on this all day, and only feel like I'm making it worse every time I change something. You don't have to spoon-feed me code, the idea should be enough...
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May 8, 2006
I'm making (or rather trying to make) a collision detection demonstration for my Media Studies coursework using a game as an example. However, I use FOR and duplicateMovieClip to create both a) the enemies and b) the bullets. how to register collisions with these objects.
Also, if anyone has any tips for using an array instead of the endlessly repeated "else if (x<num) {" lines, that'd be great to know!
For some reason I can't upload the ZIP file with the Flash in it on this Mac, but I'll upload it back on my own PC soonish. I'm not letting all this stuff I've typed out go to waste!
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Mar 16, 2010
I am having a problem with my collision game. When I try to make collision between 2 objects, this occurs: TypeError: Error #1009: Cannot access a property or method of a null object reference. at Level$iinit().
Here is my PHP Code:
package {
import flash.display.*;
import flash.events.Event;
import flash.geom.Point;
import flash.events.Event;
import flash.events.MouseEvent;
public class Level1 extends MovieClip {
[Code] .....
My flash file is at [URL].
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Nov 13, 2009
a little while ago I saw something on this website:[URL]...I decided I wanted to recreate something like it.
They're using javascript, I'm using ActionScript, anyway.I'm trying to create collision detection for an array of movieclips inside a for loop. Right now I have it that upon holding down the mouse, the same movie clip will fall onto a ground object (and bounce up occasionally,) I'm trying to make it to so each ball could stand on top of each other. I've used collision detection before for separate objects, but never for instances of the same object inside a for loop.
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Jan 16, 2011
I'm running a HitTestPoint to detect when two of my mc's collide, but I don't want them to be able to go right through each other. Someone suggested I find the x,y coords of the moving object when the collision occurs, then update that mc's coords to this x,y each time a collision occurs. I've been Googling but came up empty. Below is my code
private function __checkHit($evt:Event):void {
if (this.coin_mc.hitTestObject(target)) {
if (!hitting) {[code].....
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Feb 7, 2010
has anyone found an AS3 source/Maths-lib etc that covers not just simple collision tests but swept collision tests (at least swept AABB/circle tests) for fast moving objects? I had a quick look at flixel but even that does not seem to have sweep tests for fast moving objects.
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Feb 10, 2010
I am trying to create collision detection between mcs without having to write the code 10 times.
I thought this would work but it gives me this error:
TypeError: Error #1034: Type Coercion failed: cannot convert "crisisAnimation" to flash.display.MovieClip.
at ImagineServicesText2_fla::MainTimeline/hitTester()
Code:
var target_mc:Array = new Array();
var numTextBoxes:Number;
target_mc = ["crisisAnimation","eventTextAnimation","mediaRelationsAnimation", "mediaAnimation", "graphicAnimation", "webAnimation", "advertisingAnimation"];
[code]....
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Jun 4, 2004
i am using this code as a way to perform a hit test on two objects.
Code:
isTouching=menu1.hitTest(ease);
initially, after i run a trace on this, it comes out false. what i am wanting to know is how i can continually update this so that when my ease clip glides into the other clip, it will recognize it and do something like this.
Code:
if (isTouching){
menu1.gotoAndPlay("start")
}
the problem is, my hit test seems to be static and does not update. anyone who could explain to me how to make it check this condition would be much appreciated. maybe something with setInterval?
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Jul 3, 2010
I'm trying to create a game and I need to test if two objects touch each other. the problem is, that the hitTestObject fires before the two MCs actually touch... This is worse if one of them's rotation has been changed. How can I overcome this and get a better hit test? Is there some sort of ready class that deals with this?
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Jun 4, 2004
i am using this code as a way to perform a hit test on two objects.[code]initially, after i run a trace on this, it comes out false. what i am wanting to know is how i can continually update this so that when my ease clip glides into the other clip, it will recognize it and do something like this.[code]the problem is, my hit test seems to be static and does not update.
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Jun 18, 2009
Here's the low down of what I have
- a hero in the middle of the screen who follows the mouse
- he can shoot bullets, so there are multiple instances of the BulletClass
- zombies spawn, so there are multiple instances of the ZombieClass
Where is the best place to put my collisions detection code, and how would I even start? I'm new to AS3 so there's no real code to show you, I just need some starting advice.
Would I have to add each name of the bullet and zombie instances into an array and check them against each other in every enterframe? that could get pretty big....
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Feb 19, 2008
I read the tutorial about Multiple Object Collision Detection. What I want to do is have there be 3 circles and 3 squares. the circles are moving randomly while the squares are stationary. The actionscript would need to be checking to see whenever the moving circles collide with the stationary squares. However, it doesn't seem to be working. I followed the logic of the tutorial pretty closely, by making a separate list for the instance names. Here is the code for the collision detection.
[Code]...
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