Jul '24 (edited) • VALUE
simple approach to 2D arrays in c
Came across this cool approach to handling 2D arrays in C which I thought might be nice to share.
The approach is basically using a 1d of size width*height of the array e.g:
say we have a 1d array of our tiles enum:
enum TILES tiles[TILES_WIDTH * TILES_HEIGHT];
we can just loop over it with a single index:
for(int i = 0; i < TILES_WIDTH * TILES_HEIGHT; i++) {
enum TILES tile = tiles[i];
// If we need the x and y values
int x = index % TILES_WIDTH;
int y = index / TILES_WIDTH;
draw_rect(v2(x * tile_size, y * tile_size), v2(tile_size, tile_size), color);
}
if we want to index into a given x and y coordinate we multiply the y index by the width of the array and add the x index:
tiles[y * TILES_WIDTH + x]
I've found this approach has been useful for tile/grid based games
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simple approach to 2D arrays in c
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