|
|
(8 intermediate revisions by 5 users not shown) |
Line 1: |
Line 1: |
− | '''Block mappings''' are used to arrange large amounts of 8x8 tiles into larger tiles (16x16, followed by 128x128 or 256x256). These larger tiles are then arranged into the level layout.
| + | #REDIRECT [[sega:Block mappings]] |
− | | |
− | ==16x16 tiles==
| |
− | ===Games===
| |
− | *[[Sonic 1|Sonic the Hedgehog]]
| |
− | *[[Sonic the Hedgehog 2]]
| |
− | *[[Sonic 3 & Knuckles]]
| |
− | *[[Sonic CD]]
| |
− | *[[Sonic Crackers]]
| |
− | | |
− | ===Format===
| |
− | 16x16 tiles consist of four [[Cell|8x8 tiles]], arranged in the shape:
| |
− | {| class="prettytable"
| |
− | | width="40px" align="center" | 0
| |
− | | width="40px" align="center" | 1
| |
− | |-
| |
− | | width="40px" align="center" | 2
| |
− | | width="40px" align="center" | 3
| |
− | |}
| |
− | | |
− | Each 8x8 tile is represented by one word, which like all SEGA Genesis VDP pattern indices, is a bitmask of the form PCCY XAAA AAAA AAAA. P is the priority flag, CC is the palette line to use, X and Y indicate that the sprite should be flipped horizontally and vertically respectively, and AAA AAAA AAAA is the actual tile index, i.e. the VRAM offset of the pattern divided by $20.
| |
− | | |
− | ==128x128 tiles==
| |
− | ===Games===
| |
− | *[[Sonic the Hedgehog 2]]
| |
− | *[[Sonic 3 & Knuckles]]
| |
− | *[[Sonic Crackers]]
| |
− | | |
− | ===Format===
| |
− | 128x128 tiles consist of sixty-four 16x16 tiles. Each 16x16 tile has a two-byte value with the format '''XYYY''', where '''YYY''' is the index number of the 16x16 tile to be displayed, and''' X''' is the [[solidity]] of the tile. These are possible values for''' X''':
| |
− | =======================
| |
− | value high low
| |
− | =======================
| |
− | 0 not not
| |
− | 1 not top
| |
− | 2 not l/r
| |
− | 3 not all
| |
− | 4 top not
| |
− | 5 top top
| |
− | 6 top l/r
| |
− | 7 top all
| |
− | 8 l/r not
| |
− | 9 l/r top
| |
− | A l/r l/r
| |
− | B l/r all
| |
− | C all not
| |
− | D all top
| |
− | E all l/r
| |
− | F all all
| |
− | Additionally, add the following values to '''YYY''' to change the display mode of the 16x16 tile:
| |
− | 400 flip x
| |
− | 800 flip y
| |
− | C00 flip x+y
| |
− | | |
− | ==256x256 tiles==
| |
− | ===Games===
| |
− | *[[Sonic 1|Sonic the Hedgehog]]
| |
− | *[[Sonic CD]]
| |
− | | |
− | ===Format===
| |
− | Similar to 128x128 tiles. Values for '''X''' are:
| |
− | ================
| |
− | value solid
| |
− | ================
| |
− | 0 not
| |
− | 2 top
| |
− | 4 l/r
| |
− | 6 all
| |
− | 8 not
| |
− | A top
| |
− | C l/r
| |
− | E all
| |
− | Add the following values to '''XYYY''' to change the display mode:
| |
− | 0800 flip x
| |
− | 1000 flip y
| |
− | 1800 flip x+y
| |
− | | |
− | [[Category:Data Formats]]
| |