Tagged Questions

In collision detection problems, the challenge is to determine when shapes intersect each other.

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5
votes
1answer
55 views

Collision-detection for an SDL game

I am working on a simple SDL game in C++. I want to make my collision detection implementation better. Here's the complete project: ...
1
vote
2answers
81 views

Thread, handler and activity structure for a bouncing ball animation

This is a custom MyActivity class with two custom views (bar and a ball): ...
14
votes
1answer
3k views

Bouncing stacking boxes

I'm not sure if it would be better to make the envelope into an extension of the Rectangle constructor. The physics seem a bit dodgy, it works well most of the time, but sometimes the boxes overlap ...
11
votes
3answers
552 views

2D tilemap collision method

Is this the optimal method to check for collisions in a 2d-based game? I put together a working demo of 2D collisions here (WSAD to move, orange blocks collide). I currently use the following code ...
7
votes
2answers
331 views
4
votes
1answer
86 views

A Quadtree implementation with Colliders

I have created a QuadTree in Java and would like a general code review or suggestions. ...
7
votes
2answers
129 views

Performance Issues: Finding Nearest Polygon

Finding the nearest polygon out of a list of polygons seems to be quite a challenge on performance, due to lack of optimization. Consider the following image: I'll give the concept behind this. The ...
1
vote
0answers
302 views

Optimizing snap SVG animation with collision detection

I have a snap SVG animation which animates a bunch of circles, and draws a line between them if they are within a certain proximity of each other. However, I realize that there is a lot of optimizing ...
5
votes
3answers
192 views

Slow foreach loop to check for intersect

I'm trying to make a loop where it returns whether or not a rectangle collides and then to which coords the rectangle should move to. I'm calling my function like this: ...
6
votes
3answers
115 views

Orginizing/Optimising my collision detection setup

I'm creating a 2D tile based platformer with AABB (Axis aligned bounding boxes), and it works, I just want to organize and optimize my setup. Here are methods in my player class and entity class that ...
4
votes
0answers
138 views

Ways of speeding up this python implementation of SAT (Separating axis theorem)

A project I was working on required the usage of the Separating Axis Theorem to detect collisions between two convex polygons in real time. So I implemented a basic class (...
4
votes
2answers
476 views

Ping-pong game with JavaScript and Canvas

I have created my first ping-pong game with JavaScript and Canvas. I will be glad if anybody can tell me how to optimize the code and functionality. https://github.com/nikitalarionov/js-pong First ...
10
votes
2answers
227 views

Design of physics with Collision Detection using SFML

I found out that in Visual Studio 2012, it is possible to create project of SFML easily with a template. I am not an experienced C# programmer. Hence I wanted to implement a physics component just for ...
3
votes
5answers
2k views

Detecting collision of two divs

I have two divs as seen in this JSFiddle. To recreate the problem, keep clicking on the Gray container till both divisions touch each other. The purpose is to ...
6
votes
2answers
305 views

Performance of collision detection in a grid

I have fairly simple collision checking and handling Python code which is currently bottlenecking my performance quite a bit. I haven't done too much coding in python and I'm quite sure there's ...
14
votes
3answers
4k views

Overlapping rectangles

I received the following question in a technical interview today (for a devops/SRE position): Write a function which returns true if the two rectangles passed to it as arguments would overlap if ...
1
vote
1answer
79 views

Unit tests for collisions

I'm finding it a bit tedious to write unit tests for my collision class because there are so many variations of collisions that need testing. I see repetition in the set-up and assertion stages of ...
2
votes
1answer
156 views

Java Pong Game Collision between bat and ball

I have a very simple Pong game that I've built in Java. The code is quite long so I've decided to focus this question on the collision that occurs with the ball and the bat and also the effects in the ...
4
votes
0answers
148 views

Collision system in Pong-like game

I am writing a game like Pong. Therefore I am using an entity system approach, so I use a Component-based design. The hardest part until now was to write the collision system. As I just began with ...
3
votes
1answer
110 views

Collision detection accuracy

How do you guys think I can improve the code for collision detection on my website asteroidfield.eu5.org? The current code is ...
0
votes
1answer
156 views

Second attempt at canvas spatial grid collision

After posting my first question and my first attempt which you can see here: Canvas spatial grid collision I have re-written it to try and implement what the person gave as an answer. I didn't do ...
3
votes
1answer
203 views

Canvas spatial grid collision

You can see a working example here. Be sure to click on the canvas or the key inputs will not be detected! Are there any ways I could improve upon this? Anything that should have been done ...
1
vote
1answer
98 views

Breakout-like game in JS

I've made a small breakout game, so far with one level. My plan is to expand it so that it has a level editor, but for now I wanted to make sure that everything is currently looking well-designed. I ...
3
votes
2answers
160 views

BrickBreaker Spinoff in Haskell

I have an implementation of a BrickBreaker-like game where instead of pieces being just removed from the ceiling, each impact results in a new ball being released, gradually building up to a pretty ...
5
votes
1answer
345 views

Collision-checking optimizations

If I'm working in a 2D environment and have hundreds of objects, brute force collision-checking would be out of the question, but would my method below work? For example, let's say I have a ...
10
votes
2answers
321 views

Artifact collision in plane module

Here's something I tried putting together as I'm learning. Critiques on anything are welcome. There's also a logic bug in the Plane module I can't identify. The long and the short are that it takes ...
3
votes
1answer
6k views

Java Slick 2D Collision Detection Methodology

I have a collision detection for terrain setup (non-terrain is handled with a quadtree I implemented apart from this) and I was wondering how others have done it compared to mine and what I could ...
1
vote
1answer
161 views

Does this intersection algorithm work like it's supposed to? [closed]

and can I make it more efficient? It's to test the collision between a ray and a sphere. ...
2
votes
1answer
183 views

Collision detection inconsistencies [closed]

I've been wondering about simple collision in C++ for a while now, and I've tried to make up my own code. The code posted below works when walls are placed in a perfect rectangle around the player. ...
7
votes
3answers
713 views

Canvas Drawing/Animation

I am trying to learn how to write good, clean, and efficient JavaScript. I consider myself a novice, at best, in JavaScript. Any comments are appreciated. In an effort to become a better JavaScript ...
2
votes
1answer
608 views

Intersection-detection algorithm

This is an intersection-detection algorithm I developed as an alternative method to the one developed for my coursework. I won't post some of the other functions as they are used in the coursework ...