49
edits
Changes
From Final Fantasy Inside
→Triangle
The following was originaly described by Tonberry, in qhimm's forum. It was
completed by Ficedula sometimes later, who reversed texture data.
Additions in ''italics'' by Aali
=== Two formats ===
BOT and MAP files are similar; BOT files are redundant and look like
optimized versions of the corresponding MAP files.
''MAP file follows the structure described below and is used to load single blocks on demand. BOT file contains the same blocks but arranged to speed up initial load time by storing each block and 3 of its neighboring blocks together. For instance, the data stored for the first 2 blocks is (numbers refer to the MAP layout below): 0,1,9,10 1,2,10,11. This pattern repeats up to block #62. Replacement blocks 63-68 are divided in groups for each replacement, i.e. block 64 and 65 are part of the same group since they both belong to the Ultima Weapon crater. These groups are then stored using the same algorithm as above, each 4-block group containing a replaced block is written out again. 1-block replacements thus add 4*4 blocks to the .BOT file while 2-block replacements add 6*4 blocks. Replacements are to be made '''in order''', when writing the data for the Ultima Weapon crater the Temple of the Ancients should be gone and so on. All of this adds up to 63*4 + 4*4 + 6*4 + 4*4 + 6*4 = 332 blocks.''
=== Content ===
A block is recorded following the structure (all pointers are expressed in bytes
relative to offset 0 of block):
''Pointers have to be aligned to 4-byte boundaries, FF7 ignores the last two bits when reading the file.''
For each m in 16 meshes:
{| border="1" cellspacing="1" cellpadding="3" style="border: 1px solid black; border-collapse: collapse"
|+ For each triangle t in ''number of triangles'':
|-
! style="background:rgb(204,204,204)" align="center" | size
| Index of vertex 2 of triangle t
|-
| 1 byte''5 bits (lowest)''| ''Walkmap status of triangle t (see below)''|-| ''3 bits''| ''Mesh function ID to trigger when this triangle is stepped on.<br>Values 0-2 mean no script is attached to this triangle.<br>For values 3+ subtract 3 from this value and this will give you the mesh function ID to trigger.''
|-
| 1 byte
| Coordinate v in texture for vertex 2
|-
| 2 bytes''9 bits (lowest)''| ''Texture (see below)''|-| ''7 bits''| ''Location (message ID that will be displayed in menus and savegames)''
|}
uint8 Vertex1Index;
uint8 Vertex2Index;
''uint8 WalkabilityInfo:5;'' ''uint8 MeshFuncId:3;''
uint8 uVertex0, vVertex0;
uint8 uVertex1, vVertex1;
uint8 uVertex2, vVertex2;
''uint16 TextureInfo:9;'' ''uint16 Location:7;''
} WorldMeshTriangle;
|-
| 2 bytes
| (Unknown: Coordinate w of vertex v?)''Never used for anything in the PC version.''
|}
====Normal====
{| border="1" cellspacing="1" cellpadding="3" style="border: 1px solid black; border-collapse: collapse;"
|+For each vertex v in ''number of vertices''|-
! style="background:rgb(204,204,204)" align="center" | size
! style="background:rgb(204,204,204)" align="center" | description
|-
| 2 bytes
| (Unknown: Coordinate w of normal for vertex v? "Always 0")''Never used for anything in the PC version.''
|}
=== Walkmap ===
''Each triangle can have one of the 32 different walkmap types described below.''
{| border="1" cellspacing="1" cellpadding="3" style="border: 1px solid black; border-collapse: collapse;"
|+
! style="background:rgb(204,204,204)" align="center" | code
! style="background:rgb(204,204,204)" align="center" | type
! style="background:rgb(204,204,204)" align="center" | description
|-
| 0x23''0''| ''Grass''| Deep sea (''Most things cango here.''|-| ''1''| ''Forest''| 't land highwind'No landing here, but anything else goes.''|-| ''2''| ''Mountain''| ''Chocobos and flying machines only.''|-| ''3''| ''Sea''| ''Deep water spray when flying low), only gold chocobo and submarine can go here.''
|-
| 0x22''4''| No sea spray from highwind''River Crossing''| ''Buggy, cantiny bronco and water-capable chocobos.''t land
|-
| 0x21''5''| No sea spray from highwind, can't land'River''| ''Tiny bronco and chocobos.''
|-
| 0x20''6''| ''Water''| ''Shallow water, same as above.''|-| ''7''| ''Swamp''| ''Midgar zolom can only move in swamp areas.''|-| ''8''| ''Desert''| ''No landing.''|-| ''9''| ''Wasteland''| ''Found around Midgar, Wutai and misc other. No sea spraylanding.''|-| ''10''| ''Snow''| ''Leaves footprints, no landing.''|-| ''11''| ''Riverside''| ''Beach-like area where river and land meet.''|-| ''12''| ''Cliff''| ''Sharp drop, usually where the player can be on either side.''|-| ''13''| ''Corel Bridge''| ''Tiny bridge over the waterfall from Costa del Sol to Corel.''|-| ''14''| ''Wutai Bridge''| ''Rickety rope bridges south of Wutai.''|-| ''15''| ''Unused''| ''Doesn't seem to be used anywhere in the original data.''|-| ''16''| ''Hill side''| ''This is the tiny walkable part at the foot of a mountain.''|-| ''17''| ''Beach''| ''Where land and walkshallow water meets.''|-| ''18''| ''Sub Pen''| ''Only place where you can enter/exit the submarine.''|-| ''19''| ''Canyon''| ''The ground in cosmo canyon has this type, walkability seems to be the same as wasteland.''|-| ''20''| ''Mountain Pass''| ''The small path through the mountains connecting Costa del Sol and Corel.''|-| ''21''| ''Unknown''| ''Present around bridges, may have some special meaning.''|-| ''22''| ''Waterfall''| ''River type where the tiny bronco can't go.''|-| ''23''| ''Unused''| ''Doesn't seem to be used anywhere in the original data.''|-| ''24''| ''Gold Saucer Desert''| ''Special desert type for the golden saucer.''|-| ''25''| ''Jungle''| ''Walkability same as forest, used in southern parts of the map.''|-| ''26''| ''Sea (2)''| ''Special type of deep water, only used in one small spot next to HP-MP cave, possibly related to the underwater map/submarine.''|-| ''27''| ''Northern Cave''| ''Inside part of the crater, where you can land the highwind.''|-| ''28''| ''Gold Saucer Desert Border''| ''Narrow strip of land surrounding the golden saucer desert. Probably related to the "quicksand" script.''|-| ''29''| ''Bridgehead''| ''Small area at both ends of every bridge. May have some special meaning.''|-| ''30''| ''Back Entrance''| ''Special type that can be set unwalkable from the script.''|-| ''31''| ''Unused''| ''Doesn't seem to be used anywhere in the original data.''
|}
=== Texture ===
The lower 9 bits contain a texture number (0-511, but only 0-281
appear to be used). The text files ''Unfortunately, knowing which texture to use is not enough, the UV coordinates found in the Reeve download show how eachnumber maps to one mesh data are (or morepresumably) the original PSX VRAM coordinates, so to get the real coordinates you must subtract a texture-specific offset from each of the UV pairs.TEX files within WORLD_US.LGP (see also A complete table with every texture, its original size and offsets can be found [[FF7/LGP format WorldMap Module/TextureTable| LGP Archiveshere]]).The upper bits have something to do Sometimes you will end up with negative values after subtracting the offsets, this is normal, the texture coordinate mappingshould be assumed to repeat itself indefinitely in all directions. == BOT format == (FIXME)''
