Tile IDs

Tile IDs are stored in uint16 variables, and while it's perfectly all right for you to figure them out on your own, JJ2+ does provide you with a few helpful constants.

There are a maximum of 4095 unique tiles in any given level, and you can get any ordinary tile's ID in JCS. The "1*" destruct block in the Tubelectric tileset, for example, is at position 5,31 within the tileset. Since those numbers are 1-indexed, you need to subtract 1 from each of them. Then multiply the Y position by 10, add it to the X position, and you've got the tile ID: 304. One row below it, the "2*" block is tile ID 314, and so on.

If you've gotten a tile ID from jjTileGet and want to know which basic tile it is, you can bitwise AND the number with the constant TILE::RAWRANGE (=0xFFF): if uint16 foo is a vertically-flipped version of tile 715, then foo & TILE::RAWRANGE will equal 715 exactly.

Horizontally and vertically flipped tiles are marked by the 0x1000 and 0x2000 bits respectively, or more helpfully, TILE::HFLIPPED and TILE::VFLIPPED. Thus to get the tile ID for the horizontally flipped version of tile 443, type 443 + TILE::HFLIPPED. (Or | instead of +, to be safe.) Note that JJ2 may crash if asked to horizontally flip a tile that was not placed horizontally flipped somewhere in the level in JCS; the same issue does not apply to vertically flipped tiles.

Similarly, to place or otherwise use animated tiles, add the TILE::ANIMATED constant (=0x8000). 0 + TILE::ANIMATED will be the topmost animated tile in the list, 1 + TILE::ANIMATED will be the second from the top, and so on. You can add TILE::HFLIPPED and/or TILE::VFLIPPED at the same time as TILE::ANIMATED—1 + TILE::VFLIPPED + TILE::ANIMATED is the second animated tile from the top, flipped vertically—and ANDing by TILE::RAWRANGE will get rid of the TILE::ANIMATED flag just like it does the other two.

(These constants all belong to the TILE::Flags enum, in case you need to know that for any arcane reason.)