how to create 2D collision detection

Posted by Aidan Mueller on Game Development See other posts from Game Development or by Aidan Mueller
Published on 2012-02-20T04:20:57Z Indexed on 2012/03/24 17:38 UTC
Read the original article Hit count: 416

Filed under:

2d

|

collision-detection

I would like to know the best or most effective way to test for 2D collision.

I also can do AABBs but when you have a line, for example, that is rotated 45º, and it is really long. it will be hitting things when it shouldn't.

I might be able to go through the pixels to see if they are touching others, but that might be slow if I had a big picture. and it might add some complications if I had a movie clip made of several images.

How do I check collision between two Images? How would I do circle to box? Please help : )

PS: I do know java so you can write with java syntax and then use a made up GL

© Game Development or respective owner

Related posts about 2d

Are high powered 3D game engines better at 2D games than engines made for 2D

as seen on Game Development - Search for 'Game Development'
I'm a software engineer that's new to game programming so forgive me if this is a dumb question as I don't know that much about game engines. If I was building a 2D game am I better off going with an engine like Torque that looks like it's built for 2D, or would higher powered engines like Unreal… >>> More
2D Array of 2D Arrays (C# / XNA) [on hold]

as seen on Game Development - Search for 'Game Development'
I want to create a 2D array that contains many other 2D arrays. The problem is I'm not quite sure what I'm doing but this is the initialization code I have: int[,][,] chunk = new int[64, 64][32, 32]; For some reason Visual Studio doesn't like this and says that it's and 'invalid rank specifier'… >>> More
Need to know the origin and coordinates for 2d texture and 2d/3d vertices in webgl

as seen on Game Development - Search for 'Game Development'
Long story short, I know my coordinates are off and I believe my indices might be off. I'm trying to render a simple 2d rectangle with a texture in webgl here's the code I have for the vbo/ibo: rectVertices.vertices = new Float32Array( [ -0.5, -0.5, // Vertice 1, bottom / left 0.0, … >>> More
USB packets - receive wrong data

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
i have a little python script which shows me the packets of an enocean device and does some events depending on the packet type. unfortunately it doesn't work because i'm getting wrong packets. Parts of the python script (used pySerial): Blockquote ser = serial.Serial('/dev/ttyUSB1',57600… >>> More
Php 2d array as C# 2d array/struct

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm using MailChimp's API to subscribe email to a list. Function listsubscribe() is used for email subscription: public static listSubscribe(string apikey, string id, string email_address, array merge_vars, string email_type, boolean double_optin, boolean update_existing, boolean replace_interests… >>> More

Related posts about collision-detection

Collision detection with curves

as seen on Game Development - Search for 'Game Development'
I'm working on a 2D game in which I would like to do collision detection between a moving circle and some kind of static curves (maybe Bezier curves). Currently my game features only straight lines as the static geometry and I'm doing the collision detection by calculating the distance from the circle… >>> More
Need some advice regarding collision detection with the sprite changing its width and height

as seen on Game Development - Search for 'Game Development'
So I'm messing around with collision detection in my tile-based game and everything works fine and dandy using this method. However, now I am trying to implement sprite sheets so my character can have a walking and jumping animation. For one, I'd like to to be able to have each frame of variable… >>> More
Collision Detection - Java - Rectangle

as seen on Stack Overflow - Search for 'Stack Overflow'
I would like to know if this is a good idea that conforms to best practices that does not lead to obscenely confusing code or major performance hit(s): Make my own Collision detection class that extends Rectangle class. Then when instantiating that object doing something such as Collision col =… >>> More
Collision Detection for Actionscript 3

as seen on Stack Overflow - Search for 'Stack Overflow'
Well, I was searching for a simple collision detection function for as3, I found Collision Detection Kit, but it is too complicated, I just want a damn function that I give 2 objects as paramenters and that's it. I would like to know where can I find a pixel-perfect collision detection function (The… >>> More
The Maths for 2D Collision Detection between an OBB and a Circle

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm creating a 2D game and want to test for collision between an OBB (Oriented Bounding Box) and a Circle. I'm unsure of the maths and code to do this. I'm creating the game in c++ and opengl. >>> More