Tagged Questions

Algorithms are used for calculation, data processing, and automated reasoning. More precisely, an algorithm is an effective method expressed as a finite list of well-defined instructions for calculating a function.

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8
votes
4answers
964 views

SoA Vectors on SPU

I've read a lot about the benefits of organizing data into 'Structs of Arrays' (SoA) instead of the typical 'Array of Structs' (AoS) to get better throughput when using SIMD instructions. While the ...
5
votes
6answers
2k views

Algorithm for drawing asteroids from, er… Asteroids game?

What would the algorithm be for generating/drawing the asteroid shapes from the original Asteroids game? Is it even an algorithm? Or would they be hard coded shapes? Here is a screenshot to jog your ...
9
votes
5answers
901 views

Slow performance on an A* implementation in a tower defense game

I'm making a Tower Defense game in Flash with no predefined path. Although my grid is 40x40 (small?), A* is struggling when recalculating every time. So I made my own modification to ease the ...
5
votes
4answers
813 views

Dynamic Dijkstra

I need dynamic dijkstra algorithm that can update itself when edge's cost is changed without a full recalculation. Full recalculation is not an option. I've tryed to "brew" my own implemantion with no ...
1
vote
2answers
380 views

How to allow character to keep moving after it hits a wall

I am developing an iPhone game. There is a fountain that the user should not be able to walk through. Now, this question is about checking circle-point collision or anything like that. I am checking ...
9
votes
1answer
431 views

Locate the shortest path through obstacles when all normal paths are blocked

I'm making a Tower Defense and I have basic pathfinding working, but I got a problem. I want to make the path blockable, and when a block occurs the runners will attack the blocking towers. So what ...
10
votes
6answers
3k views

Which is the best approach to make a 2D character to be able to use tons of different equipments when in action?

I want to create a 2D game but I'd like to have the character to wear tons of different equipments on different combinations, like a RPG or something. So let's say the user changes his/her shoulders ...
24
votes
3answers
12k views

How does Navigation Mesh path-finding work?

I want to understand how navmeshes work, how to implement them and why it is better than other types of pathing systems.
3
votes
1answer
432 views

How to use transposition tables with MTD(f)

I'm writing an AI for a card game and after some testing I've discovered that using MTD(f) on my alpha beta algorithm - a series of zero-window searches - is faster than just using alpha-beta by ...
25
votes
11answers
3k views

What are your favourite game-specific coding gems? [closed]

I'll start off with John Carmack's the Fast Inverse Square Root in Quake III: float Q_rsqrt(float number) { long i; float x2, y; const float threehalfs = 1.5F; x2 = number * 0.5F; y = ...
14
votes
9answers
5k views

Dynamic pathing algorithm for tower defense game

I'm making a Tower Defense and I need a good pathing algorithm for it. I have thought about Dijkstra but I need one that can be dynamic; it must be able to update itself when one edge is removed or ...
21
votes
7answers
9k views

Algorithm for generating a 2d maze

What algorithm have you used in the past to generate a simple 2d maze?
3
votes
6answers
783 views

In what instances would you want to use path-finding algorithms other than A*?

I am familiar with how the common ones technically work (BFS, DFS, Dijkstra, A*) but as far as their realistic benefits I don't quite see the need for them. Considering that, given the right ...
53
votes
11answers
4k views

How does A* pathfinding work?

I would like to understand on a fundamental level the way in which A* pathfinding works. Any code or psuedo-code implementations as well as visualizations would be helpful.
10
votes
4answers
486 views

Gesture Recognition Strategies

Working with the Wii I often find it necessary to recognize simple gestures, so far I've been able to mainly look at magnitude of acceleration in order to recognize the gestures called out for in our ...
37
votes
11answers
11k views

What path finding algorithms are there? [closed]

I'd like to read up on path finding algorithms. Is there a primer available or any material or tutorials on the Internet that would be a good start for me?