ActionScript 2.0 :: Collision Detection Between A Narrow Spinning Rectangle And Other Shapes?
Aug 19, 2011
I'm trying to make a labyrinth type game where you control a narrow spinning rectangle. And you have to navigate it through a course without touching the walls.
I've been looking for 2 evenings now and I just can't find any type of collision detection that will do this. I'm quite a novice so I'm beginning to wonder if this is even possible for me to accomplish. All the tutorials I find are assuming the player will be a square, circle or a point.
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Apr 19, 2010
for the past two weeks I've been working on coming up with a collision detection system for my game in flash CS4. No matter what I try for some reason I just can't seem to do it, and I don't know how to fix it. This has never been an issue for me, I would even settle for basic rectangle to rectangle collision if I could, but no matter what I do I end up screwing it at all up. Somehow the collision detection either doesn't work at all, works for one side and jumps the guy through the wall on any other side or I think at one point it worked for two sides as long as I didn't hold down more than one movement key.
I've constantly scrapped what I've done over and over, right now I have no source code to present. I'm totally lost and confused, and my deadline for getting this done is today in a few hours. I really wanted to figure this out on my own but honestly I just don't see what I can do, I've got sphere to sphere collision detection working perfectly for my player and other spheres, but the walls are squares lined up to form long rectangles, and I just can't seem to get it to work. I'm dynamically loading the square-wall blocks as tiles to form a dynamically loaded map, and then I'm iterating through each individual block to determine if collision has occurred with the player. I think somehow I'm not managing the results right, or maybe I somehow need to be able to determine which direction the player hit the wall from, but I just don't know how to do it.
I've been staring at the screen for the past 3 hours trying to work something out but nothing is coming to me, example from a flash-type game or something similar I would be very grateful! (I've done this countless times in C++, C#, and java. I don't get what is going on in flash :-(((( )
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Jun 23, 2011
I've been trying to fiqure out how to use the collision detection on one side of a rectangle differently then the other sides. for example: Mario mashes boxes with his head, by standing under the box and jumping up. (I'm refering to just the Super Mario Bros. game). If Mario hits the box from the sides or top nothing will break or come out of the box. How do you do that in Actionscript 3.0.
[Code]....
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Oct 2, 2011
I have a Sprite that contains opaque objects surrounded by transparent pixels. I also have a Rectangle that represents a part of the Sprite that I want to render using BitmapData.draw(). The problem is that the Rectangle that I obtained also contains transparent parts. How can I narrow the Rectangle to only include the opaque parts and ignore the transparent surroundings?
kapep's answer is just what I want to do, but the problem is that the source is a Sprite, not a BitmapData object, and I don't have getColorBoundsRect() on a Sprite.
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Oct 16, 2009
In my file (AS2), I have a small square at the middle of the page. Diagonally to the right, I have a vertical wall which is a rectangle. Pasted inside my small square, I have the code:
onClipEvent(enterFrame) {
if (Key.isDown(Key.RIGHT)) {
if (this.hitTest(Wall._x, Wall._y, false)) _x =
[code]......
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May 20, 2011
how to respond when a rectangle hits another rectangle? I already know how to detect the collision, I just don't know how to respond to it. I'm just trying making a simple side-scrolling platform game where I have platforms I can walk on and bump against on all sides. I have searched everywhere and just can't find the tutorials I'm looking for.
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Aug 1, 2004
I have a banner, and on this banner there are three wheels which spin continuously by way of motion tweens.What I want to do is have them stop spinning for a few seconds and then continue spinning, this process will be repeated every time.
So my question is: How would I accomplish this?I know I could just add a bunch of frames to stop the wheels from spinning, but I was wondering if there's a script that will do this without having to add frames.
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Nov 12, 2009
I want to detect when a circle collides into a random object. I know this is pretty basic to do with a mouse colliding into a random object but I want to modify this for a circle. I have seen some examples which use circles but they are drawn in script, is it possible to do this with a mc from the library.
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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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Oct 16, 2010
Im using CDK, and I want to exclude color black.im using this: __collisionList.excludeColor(0x00000000);
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May 3, 2009
Its been many years since I've used flash and I was just wondering what the easiest way to do collision detection was now. I know that there was some hit test bounding box stuff present earlier but I don't know the capabilities of flash cs4 and the advances that have been made. Google searches have yielded things like complex pixel-perfect collision detection but not a lot seems to have been written about CS4 yet.
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Mar 19, 2009
I am trying to get some collision detection working. What I have is a ball moving around the stage. There is a box in the middle which when the ball hits, I would like it to bounce off the box. I can get the x axis working fine using hitTestObject but when I detect for collisions on the y axis, the two axis conflict. Does anyone have a way of doing this properly?[code]
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Aug 25, 2008
So I've been googling around for information on detecting collisions in AS3 and I found this page which has what troy claims to be a 'pixel-perfect' collision detection algorithm:[URL]..
[Code]...
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Oct 28, 2010
HitTestObject seems to check collision of bounddaries of shapes, it seems to consider everything rectangular. Also if one object jumps two pixel and other five pixels on EnterFrame it seems like there won't be any hit detection. Seriously guys what else method do you use, if you use hitTestObject how do you use?
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Apr 19, 2010
I'm making small interactive games in flash to learn AS3,I need to check the collision between the player and the wall which is normally simple using the hitTestObject function.But now I made a wall object totally surrounding the player with corridors and turn, a collision playground so to speak. Now when I use the hitTestObject function to check whether the player is in collision with the wall it tells me it always collides supposedly because the player object is within the bounds of the wall object.So assuming that I'm correct about the error:How can I prevent getting a collision when I'm inside the bounds of the wall object but not touching the actual walls in that object?
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Feb 22, 2012
I'm trying to make a game like Mario. I've made a character which can jump right now, but I've got some problems with collision detection.
I would like my character to jump on a bar, which is placed higher. My collision detection doesn't work at all I gues..I've made a cirle which has a instance name mcMain and I've made a MovieClip of it. T also made a rectangle which has a instance name balkje, I also made aMovieClip of it.
I hope you can tell me what is wrong about my code and what I've to change to make the collision detection work!
[Code]...
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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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Jun 11, 2010
I am in the process of building a project in which several MovieClips "swim" around semi-randomly, and another MovieClip that appears and expands over the mouse on click alters the frequency of the turns. Do do so, I simply need to change the value of a single variable on the first MovieClip's timeline when the two collide. I am using hitTestObject, but I keep running into errors. The expanding MovieClip does not have an instance name, because it only appears when the mouse is clicked, and quickly disappears.
I am receiving the error 1067: Implicit coercion of a value of type Class to an unrelated type flash.display.DisplayObject My code causing my first MovieClip to "swim" is on that MC's timeline, while the rest of the code is on the main timeline.
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Apr 10, 2011
I have this problem: I am making a game with flash cs5, and i am coding in as3 i have written some code, that spawns an child (a fireball) from the character position. i made a movieclip symbol on my main scene, that mc is the "parent" for all the enemies that i am adding but now i need to detect the collision between an enemy child and a fireball child, does anybody know how to do that? if asked i can post some parts of my code
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Apr 26, 2011
Here is part of my code:
Code:
protected function button_clickHandler(event:MouseEvent):void
{
[code].....
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Jun 15, 2011
I need help with one of my Flash projects,I'm trying to use gskinners shape based collision detection, but for some reason I cant get it to work, but im pretty new to using classes, so I dont understand the structure too much. Can i get a tutorial on how to use the gskinner class? im using the as2 version.heres the code, bare with me, there's a lot here. in all codes, mc1 is the track outline MC, and mc2 is the car
basicly im making a 2D top down version of WipEout HD Fury, so file structure is something like this (the .fla is called wipeout as3 because i was initialy coding in as3 and never changed the filename).wipeout as3.fla (the flash file containing all the MCs and animations, but only enough coding to import all of the external code files, as well as the VCam and its script)
the code is;
Code: Select all #include RaceControl.as"
the RaceControl.as is used to determine the Car's control scheme, and refers to a physics code called RaceCar.as. i found it on the interwebs, all credit to matt carpenter;
Code: Select all// Race control
// Create key listener[code]........
the Bounce Function is my own work, and is what i want to happen when a collision is detected.now, the movieclip used for the car is my own drawn design, as is the track, and i want to use GSkinner's shape based collision to detect the collisions properly. so far i have the car driving around quite happily but i need it to collide with the walls of the track, rather than drive right through them.
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Jan 4, 2004
I was wondering how you get the collsion detection to be just what is in the MCs instead of a rectangularness of the movieClip.
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Apr 20, 2010
Im trying desperately to learn figure out how to get the collisons working with the blocks.it works on some blocks some times. Ive tried everything I can think of!testBlocksCollisions() is the function that wont work. I have a clip called ball on the stage a clip called bat and block1-9 on the stageu could also explain where I was going wrong that would be immense.this is my code
Code:
package {
import flash.display.MovieClip;
[code]...
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May 14, 2010
I was wondering what classes do you use for good collision detection for games and similar, I have used Corey Oneil's CDK (Collision Detection Kit url... and an as3 port of the Grant Skinner method (url...) but here's the issue, with the cdk the problem is that I'm using flashdevelop and the compiler is kind of strict so I have to rewrite a lot of thing that function in the normal flash compiler, the gskinner port has a problem about some null object reference.I was wondering if any of you could recommend me some classes or tell me how do you handle your collision detection.
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Apr 7, 2011
I have a collision detection working so when I drag an e.target on a button a flv loads externally onto the stage, but the flv keeps adding to the stage repeatidly. Is there a way I can drag the the e.target onto the button that the flv will only add to the stage once, even though the e.target remains colliding with the button?I cant have a MOUSE_UP event listener as I already have an ENTER_FRAME listener within the if statement.
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May 3, 2011
EDIT :The thread has transitioned into [3d collision detection with as3 ] - check last post I'm in the making of my molehill game, and have now approached a little problem: I have my Terrain and my Mesh(character model). Moving/walking the mesh around was simple enough (X,Z). But when i added elevation to the terrain, i have to add movement in Y depending on the Y pos of the terrains vertices. My terrain does not have a fixed grid, and eventually might not have equal amount of rows per col. The way that i receive the verticeData is through one long vector.
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Apr 18, 2012
I'm trying to create an animated 'LED style' display. I want to draw/tween/type shapes or text and have the 'LED dots' detect the animation and turn on the relevant dots.'ve been testing the hittests but it slows down pretty quickly and the problem with the hitTestObject is that it obviously just detects the bounding box, NOT the vectors.
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Feb 29, 2004
I'm having a bit of trouble with psuedo 3d collisions using spheres. I'm using _xscale and _yscale to emulate the z-axis (no horizon point), and am having trouble determining the distance between the objects on the z-axis based upon their relative scales. I'm not concerned at this moment with creating new vectors based upon hit angles, just getting the z-index collision detection working.
(I also need to tweak the code to prevent trapping, so much todo) Here's the code, the issue is how do I determine the correct value for the z-axis in the hittest? note-this only works when I publish in flash6 when using mx2004, the collision detection doesn't work at all when published for flash7?!?
[Code]...
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Mar 22, 2009
most efficient way to test for a collision between a circle and a rectangle?
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Feb 18, 2008
I'm making a basic platformer to familiarize myself with AS3. I'm currently having an issue with the HitTestObject and HitTestPoint methods. Currently my game consists of a character who can run and jump, and a box which should prevent him from falling. I have two questions (the complete code is attached and is only
briefly referenced in the questions):
1) Why is my HitTestObject broken? The issue I'm having is that when I perform box.HitTestObject(character), the screen shakes in most of the character poses (i.e. facing left or right) but not when the character is crouching. I suspect this is because the bounding box in the different frames of my character movieclip are not the same. Is this the case, and how can I make certain my bounding boxes are exactly the same across all frames?
[Code]....
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