I have a hero and a enemy,Now When a hero contact the enemy the hero should automatically fall down.How can I add a Collision method to it.
Well do some research! There are a lot of samples out there that Aymeric has posted.
The most common is to use the SimpleCitrusSolver. It's quite easy and is done with one line of code: simpleCitrusSolver.collide(DynamicObject, StaticObject);
You can find more for this in the simple collision example.
Other samples can be found at the Citrus Engine Examples github page.
Related
I successfully implemented liquidfun extension in my libgdx/box2d project, but the particles that are created in the box2d world doesn't seem to collide with anything at all when used in my project. The test code given with the setup works good in the way that it collides with the rigid bodies.
I actually want to know any way that collision filtering can be done between the particles and rigid bodies here. Apparently categorybits/maskbits do not work here. Please Help!
Or that's what I think, at least.
I just began with AS3 and I'm trying to do a little game where one ball moves on its own and the other one is handled by the player. So far, so good. That works.
What isn't working is hitTestObject(); it just returns true when it's like 2 cm from the other object. Here's a picture so you can see: http://dl.dropbox.com/u/37057843/coll2.jpg
I've read that hitTestObject just creats a rectangle around the objects and then tests for collisions on those rectangles, is it because of that?
If you need any piece of code I'll deliver. I know there are some other opensource libraries/engines like Box2D to solve this in a better way, but I don't want to jump to engines directly.
Thanks for reading!
Yes, hitTestObject will use the clips bounding box.
Check out this link, it has a lot of great information as well as a class that will do what you're looking for
http://sierakowski.eu/list-of-tips/39-collision-detection-methods-hittest-and-hittestobject-alternatives.html
Direct link to the package
http://code.google.com/p/collisiondetectionkit/
I am making a maze game and i have the edge of the maze as a movieclip. I'm trying to test if the player hit tests the maze to make him stop using this code.
If(player.hitTestObject(Maze))
{
function()
}
But wether or not It's actually touching the maze (it's in the empty space on the inside) it always registers as touching. Is there any way to fix this?
You won't have to use any physics api. They are too heavy and complex and your task is simple. Try replacing your hitTest method for hitTestPoint
if(Maze.hitTestPoint(player.x,player.y))
{
function()
}
Cheers!
This is what you're looking for:
http://www.mikechambers.com/blog/2009/06/24/using-bitmapdata-hittest-for-collision-detection/
The reason why hitTest always says true, is that it only checks to see if the bounding boxes for the two objects touch each other. More nfo on what that means can probably be found in the link above. What is in the link above, is an explanation of how to do pixel-perfect hit tests in flash. :) Also if you're doing a game using collision like this and/or any kind of physics, you may be interest in this tutorial:
http://gotoandlearn.com/play.php?id=135
It's a video about a world construction kit for Box2D, probably the most popular physics library for flash.
I'm trying to create a multi-level dungeon adventure in Flash CS4. The layout is an instance created of a symbol called Level, within the symbol are multiple wall subsymbols (wall), instances of Wall. There is a collision routine to stop the player walking through the walls, called from Wall.As.
Level is drawn about the centre point (0,0).
When I create an instance on the stage of Level (level), the collision tester is using the xy coordinates for the walls drawn about 0,0, not the "real" xy where it's appearing on the stage.
So what I need to know, is how to "update" the xy for each wall subsymbol with the live stage information, overriding the XYs drawn in the parent. It has to be updated unfortunately (I can't keep it static), as the levels are big so have to scroll.
Thanks for your advice.
With all due respect forget your approach, you're reinventing the wheel for nothing and probably to end up getting worse performance. What you need is pixel-perfect collision detection and probably including basic physics so already we're talking a huge amount of work. If you want to build levels in a design way for a game, use this, it'll blow your mind how awesome/easy/cool this is:
http://www.gotoandlearn.com/play.php?id=135
Its always a guess when trying to answer questions like this, as there are a lot of unknowns. That being said, in programming, there are always more than a few ways to solve a problem. Examine your collision detection routine - if you worked with hitTestPoint, and the point that was being tested (mouseX,Y or your main actor) with localToGlobal, you likely wouldn't need to test for the x,y variables of your collision objects. Read up on those two subjects and this question might be rendered moot.
At any rate, you could update relative coordinates in your Wall.as instance by leveraging globlaToLocal:
public function get curLoc():Point
{
return globalToLocal(new Point(this.x, this.y));
}
and retrieve them from your parent class as a point you can then test against:
trace(_wall.curLoc);
Hope that helps
I suppose you could accomplish what you're trying to do by manipulating the transform property of the wall symbols, but honestly I would concur with Ascension Systems and just abandon your collision testing routine for something different.
You may not need to go all out with a physics engine for your game, in which case just use hitTestObject to do the collision detection.
Can anyone recommend a decent tutorial, add-on or approach to creating a page rip off effect in flash?
I want to create a notepad where each page can be ripped off to reveal further content.
Thanks
Paul
are you looking for a pageFlip with a tearing feature? if so it does exist even though I can't find the link (anyway it was AS2).
if you want more flexibility, you can take a look at a cloth simulation ; derschmale did a great example and pixelero did sort of the same with linked lists (=faster)
there's also this particle physics engine called Traer that have been ported from java and that allows you to get the cloth behaviour with fewer lines of code and some fine tuning (stiffness, damping a.s.o. ).
the general idea is to subdivide the displayObject you want to tear off into a series of triangles, take a snapshot of that object in a BitmapData, then redraw the distorted grid with the drawTriangles() method.
I think it is how they do the thing in the cloth examples.