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Top-down 2d Tile game - how to generate wall tiles?

Jakub K. · 2014-08-07T12:31:34

I am working on a simple 2D top down tile based game where a tile is either "floor" or "wall." A good example of what I want is the oldschool Alien Assault: Now my question is - how do I create the wall tiles? If I was just to hand-draw these then it would mean 256 different wall tiles (since each tile is surrounded by 8 tiles that can be wall or floor, so 2^8 = 256). Even if I do some mirroring/rotating, it's still seems like an annoying amount of tiles (especially laying those out onto a tilesheet to fit some auto-matching algorithm). Is there a better way of doing this, or is that pretty much how most 2D games do it? One other idea I had was to (just for rendering) subdivide each tile into 4 and treat each corner separately. Since you always know the corner will have at least two surrounding walls you only need 4 variants per each corner, meaning 16 images total: Looking at RPG maker tilesets I am guessing this is how they do walls, as all you need is this: To create something like this: The only CON here is that, since the walls would be using a lot more smaller pieces, they could get easily very repetitive, unless I introduce few variants for each of the pieces and randomize it? Any input from the more experienced is appreciated. (also, I did try searching but oddly having a hard time finding tutorials for this topic. Ho hum!)\ EDIT: actually here is a the RPGMaker autotile explanation, which is basically what I jsut figured out above lol: http://blog.rpgmakerweb.com/tutorials/anatomy-of-an-autotile/

General and Gameplay Programming Programming

Started by Koobazaur July 19, 2014 06:54 AM

9 comments, last by Sporniket 9 years, 8 months ago

Sporniket

360

August 07, 2014 12:31 PM

Seeing your screenshot, I sense that you should separate the model of your level from the rendering :

The model is a matrix of cells that are "floor" and "empty" and match the red grid on your screenshot. We don't need walls in this model : the player can go to a neighbour cell (8 direction) only if this neighbour cell is "floor".

On the other hand, the rendering of your maze use a smaller grid so that it can use a tileset like the one you found. Here I would say that one cell is drawn using 4 tiles. The tiles array is preprocessed to compute where to put a wall.

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Top-down 2d Tile game - how to generate wall tiles?

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Top-down 2d Tile game - how to generate wall tiles?

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