Good baseline size for an A* Search grid?

Posted by Jo-Herman Haugholt on Game Development See other posts from Game Development or by Jo-Herman Haugholt
Published on 2011-11-21T08:35:46Z Indexed on 2011/11/21 10:22 UTC
Read the original article Hit count: 427

Filed under:

path-finding

|

tilemap

I'm working on a grid based game/prototype with a continuous open map, and are currently considering what size to make each segment. I've seen some articles mention different sizes, but most of them is really old, so I'm unsure how well they map to the various platforms and performance demands common today.

As for the project, it's a hybrid of 2D and 3D, but for path-finding purposes, the majority of searches would be approximately 2D. From a graphics perspective, the minimum segment size would be 64x64 in the XZ plane to minimize loaded segments while ensuring full screen coverage. I figure pathfinding would be an important indicator of maximum practical size.

© Game Development or respective owner

Related posts about path-finding

Do I need path finding to make AI avoid obstacles?

as seen on Game Development - Search for 'Game Development'
How do you know when a path-finding algorithm is really needed? There are contexts, where you just want to improve AI navigation to avoid an object, like a space -ship that won't crash on a planet or a car that already knows where to steer, but needs small corrections to avoid a road bump. As I've… >>> More
Why is Reinforcement Learning so rarely used in pathfinding?

as seen on Game Development - Search for 'Game Development'
The venerable shortest-path graph theoretic algorithm A* and subsequent improvements (e.g., Hierarchical Annotated A*) is clearly the technique of choice for pathfinding in game development. Instead, it just seems to me that RL is a more natural paradigm to move a character around a game space. And… >>> More
Pathfinding Algorithm For Pacman

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I wanted to implement the game Pacman. For the AI, I was thinking of using the A* algorithm, having seen it on numerous forums. However, I implemented the Breadth First Search for some simple pathfinding (going from point a to point b with certain obstacles in between) and found it gave the optimum… >>> More
Graphical sandbox for pathfinding

as seen on Stack Overflow - Search for 'Stack Overflow'
If you needed a clean and consistent sandbox for pathfinding what would you use? I want to experiment with different pathfinding algorithms by sending virtual units (robots) around obstacles on a geometric plane. But I don't need a feature overkill like a game engine or Flash might have, just an… >>> More
method for specialized pathfinding?

as seen on Stack Overflow - Search for 'Stack Overflow'
I am working on a roguelike in my (very little) free time. Each level will basically be a few rectangular rooms connected together by paths. I want the paths between rooms to be natural-looking and windy, however. For example, I would not consider the following natural-looking: B … >>> More

Related posts about tilemap

How to properly scroll a 2D tilemap?

as seen on Game Development - Search for 'Game Development'
Hello and I'm trying to make my own game engine in Java. I have completed all the necessary ones but I can't figure it out with the TileGame class. It just can't scroll. Also there are no exceptions. Here I'm listing the code. TileGame.java @Override public void draw(Graphics2D g) { if (back… >>> More
How to implement RLE into a tilemap?

as seen on Game Development - Search for 'Game Development'
Currently I've been using a 3D array for my tiles in a 2D world but the 3D side comes in when moving down into caves and whatnot. Now this is not memory efficient and I switched over to a 2D array and can now have much larger maps. The only issue I'm having now is that it seems that my tiles cannot… >>> More
Advice for creating fog of war on tilemap game XNA

as seen on Game Development - Search for 'Game Development'
I have created a 2D Tile Based game. The game has a single path that the sprite can move on. I want to create to make the entire screen black except for where the sprite is. The sprite has commands such as left where he keeps looking left, right where he keeps looking right and move forward where… >>> More
Flixel - Animated Tilemaps

as seen on Game Development - Search for 'Game Development'
I am using Flixel 2.55 and I am trying to animate a tilemap. I found this piece of code that apparently enables the use of sprites as tiles. From what I understand, this loops over the tilemap's graphic and replaces the tile's pixels with the sprite's pixels each time they change. I have implemented… >>> More
Z axis in isometric tilemap

as seen on Game Development - Search for 'Game Development'
I'm experimenting with isometric tile maps in JavaScript and HTML5 Canvas. I'm storing tile map data in JavaScript 2D array. // 0 - Grass // 1 - Dirt // ... var mapData = [ [0, 0, 0, 0, 0], [0, 0, 1, 0, 0, ... ] and draw for(var i = 0; i < mapData.length; i++) { for(var j =… >>> More