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banjo_tooie:model_data

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Model Data

Banjo-Tooie uses a file-system in which most resources are packed into file blocks throughout the ROM, and are unpacked into RAM when needed. Among these are the model files, each with their own syntax and load-lines. This page's purpose is to cover the syntax and properties of said model files. Note that it is very similar to Banjo-Kazooie's model format, just with more features like collision changes, optimised texture headers, and F3DEX2 instead of F3DEX.

Address Value/Syntax Description
0x00000000 [00 00 00 0B] START
0x00000004 [aa aa aa aa] Geometry Layout Offset
0x00000008 [bb bb cc cc] bb=Texture Setup Offset (Usually 00 50), cc=Geo Type*
0x0000000C [dd dd dd dd] Display List Setup Offset
0x00000010 [ee ee ee ee] Vertex Store Setup Offset
0x00000014 [00 00 00 00] ?
0x00000018 [ff ff ff ff] Animation Setup
0x0000001C [gg gg gg gg] Collision Setup
0x00000020 [hh hh hh hh] Effects Setup End Address
0x00000024 [hh hh hh hh] Effects Setup
0x00000028 [ii ii ii ii] Vertex-Bone Mapping
0x0000002C [jj jj jj jj] Texure Animation Setup
0x00000030 [00 00 00 00] ?
0x00000034 [00 00 kk kk] Related to external textures???
0x00000038 [ll ll ll ll] Vertex Normals
0x00000044 [nn nn oo oo] nnnn= Tri count, oooo= vert count
0x00000048 [00 00 00 00] ?
0x0000004C [00 00 00 00] ?

*Geo Types: 0000=normal, 0002= Trilinear MipMapping (RGBA16), 0004=Env mapping, 0010=?

Texture Setup

Offset from TexSetup Start Value/Syntax Description
0x00000000 [aa aa aa aa] Amount of data in bytes to load (including command)
0x00000004 [bb bb cc 00] bb=Texture Count, cc=External Textures(01y 00n)
0x00000008 [dd dd dd dd] Texture[i] segment address from texture data start OR External Texture Index*
0x0000000C [ee ff xx yy] Texture[i] ee = 0x80 for MIP Mapping (00 otherwise), ff =type*, xxyy=Pixel Grid

*Types: 01=CI4, 02=CI8, 04=RGBA16, 08=RGBA32, 0x10=IA8, 

*External texture indices start at FileID 0x1EF6, 0 indexed.

Example: 00 00 13 28 80 04 20 20

External texture file ID= 1EF6+1328 = 321E
This will load an RGBA16 32x32 mipmapped texture from FileID 0x321E.

Display List Setup

Offset from DLSetup Start Value/Syntax Description
0x00000000 [aa aa aa aa 00 00 00 00] F3DEX2 Command Count
0x00000008 F3DEX2 F3DEX2 Display List

Vertex Store Setup

Offset from VTXSetup Start Value/Syntax Description
0x00000000 [aa aa bb bb cc cc] Draw distance: Negative Coords
0x00000006 [dd dd ee ee ff ff] Draw distance: Positive Coords
0x0000000C [xx xx yy yy zz zz] Object Coordinate Range
0x00000012 [jj jj] Collision range? (Enemies, Objects)
0x00000014 [kk kk] Collision range? (Banjo)
0x00000016 [ll ll] Vertex Count*2

Animation Setup

Offset from Setup Start Value/Syntax Description
0x00000000 [aa aa aa aa] Translation Scale (float)
0x00000004 [bb bb 00 00] Bone Count
Offset From Bone Start
0x00000000 [xx xx xx xx] Bone X Translation (float)
0x00000004 [yy yy yy yy] Bone Y Translation (float)
0x00000008 [zz zz zz zz] Bone Z Translation (float)
0x0000000C [cc cc dd dd] cccc=Bone ID, dddd=Parent Index

Effects Setup

Offset from Setup Start Value/Syntax Description
0x00000000 [aa aa] Effect Count
0x0000002 [bb bb cc cc] bbbb=Effect ID, cccc=Effect Vertex Count
0x0000006 [dd dd ee ee] dddd, eeee…=Effect Vertex Index List
…

Effect IDs are 

100*Type + Param  (decimal)

where Param is usually used to control the speed of the effect, and Type is taken from

TypeDLL NameDescription
0 Code room letters
1 idscroll Texture scrolling (along vertical axis)
2 idlight Flickering vertex color, for fake lighting around flames
3 idwater Oscillating texture scrolling
4
5 idglow Vertex color regularly gets brighter and dimmer
6
7 idwave Rippling water surface, amplitude controlled by bounding box of affected vertices
8 idglowa Like glow, but only for vertex alpha
9 idflasha
10 idflash
11
12 idwibble All wibbles use a spherical wave to change some vertex parameters (usually texture coordinate and color). This one is faster, with a smaller amplitudes
13 idwibble Standard wibble
14 idwibble Only wibble color
15 idwibble Only wibble texture coordinates
16 idwibble Also move up and down, like idwave
17 idbounce Used for bouncy castle
18 idtwinkle Used for mine crystals; occasionally choose a center vertex and briefly brighten the vertex colors on its neighbors with random delays
19 idflame
20 idtwinklea
21 idwibble Fast wibble, with larger amplitudes
22 idtwinklecolour

—-

Vertex-Bone Mapping

Offset from Setup Start Value/Syntax Description
0x00000000 [aa aa bb bb] aaaa=Has Norms, bbbb=Entry Count
Offset From Entry Start
0x00000000 [cc cc dd dd ee ee] cccc=Bone ID, dddd=Position Count, eeee=Normal Count
0x00000006 [xx xx yy yy zz zz] Vertex Position (in bone space)
…
0x6 + 6*Positions [xx yy zz 00] Vertex Normal (in bone space)
…
0x6 + 6*Positions + 4*Normals [ee ee ff ff] eeee, ffff,…=Vertex IDs

Each vertex is assumed to have its own normal, but some share positions. The initial vertices are assigned the first position, then an ID of -1 in the list indicates that the following vertices should use the next position in the list, and -2 indicates the end. Thus there are (Normal Count) + (Offset Count) entries in the ID list, including the negative values.

Texture Animation Setup

Up to five entries corresponding to segments 0xF,0xD,0xE,0xC,0xB of the following form:

Offset from Entry Start Value/Syntax Description
0x00000000 [aa aa bb bb] aaaa=Block Size, bbbb=Block Count
0x00000004 [cc cc cc cc] Frames Per Second (float)

A block is contiguous memory holding texture data which gets loaded into the corresponding segment. The chosen block advances at the specified framerate, looping back around to the beginning.

banjo_tooie/model_data.txt · Last modified: 2024/02/29 04:24 by BanjoFreak64

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