T
.t## holds the tilemap for a map (see Map Format for lump naming). It starts with a BSAVE Header followed by a 4 byte header with the size of the map.
The number of layers is NOT stored anywhere. It is inferred from the size of the lump. Note: it seems that very old games always have 32000 bytes of tile data (after the 4 byte header).
The minimum map size is 16x10 tiles. The maximum number of tiles that Custom will allow a map to be resized to is 100,000 tiles (per layer); however this is an arbitrary limitation in the resize menu (that might be raised in future), so you should accept maps of any size.
[edit] Formal Specs
| Data | Meaning |
|---|---|
| INT | Width |
| INT | Height |
| BYTE * w * h * numlayers | w*h bytes for layer 0, w*h bytes for layer 1, etc... |
Tiles are stored in left-to-right rows, from top to bottom. 0-159 are regular tiles, 160-207 are animating tiles in set 0 and 208-255 are animating tiles in set 1.
Very old games have a single layer followed by garbage to make up 32000 bytes of tile data (total lump size of 32011 bytes). Somewhat newer games have a single layer, not followed by garbage. Newer still games have 3 layers, even if only 1 of them is used and the user never asked for them (the others will not be marked visible in MAP). Newest of all (starting with Ypsiliform) maps may have from 1 to 8 layers, and default to 1 instead of 3 layers.
ARCHINYM.LMP . BROWSE.TXT . ATTACK.BIN . BINSIZE.BIN . DEFPAL#.BIN . DEFPASS.BIN . FIXBITS.BIN . LOOKUP.BIN . MENUS.BIN . MENUITEM.BIN . PALETTES.BIN . PLOTSCR.LST . SFXDATA.BIN . SONGDATA.BIN . UICOLORS.BIN . slicetree_#_#.reld . GEN . BAM . Map Format . T . P . E . D . L . N . Z . DOR . DOX . DT0 . DT1 . DT6 . EFS . FOR . FNT . HSP . HSZ . ITM . MAP . MAS . MN . MXS . PAL . PT0 . PT1 . PT2 . PT3 . PT4 . PT5 . PT6 . PT7 . PT8 . SAY . SHO . SNG . STF . STT . TAP . TIL . TMN . VEH
