Table of Contents

Extreme-G GFX/Collision Commands

Extreme-G uses high level commands to define level models' GFX and collision data.


00 end_submesh

00

Presumably pushes the address of the current display list to some array and ends the current display list.

Emits:

gsSPEndDisplayList()

01 vertex_list

01 [NN] [XX XX] [YY YY] [ZZ ZZ] [TI] [RR] [GG] [BB] […]

Defines a list of vertices to be used by tri1 and tri2 commands.

TI indexes the level's texture coordinate table to obtain the vertices' S and T texture coordinate values.

ParameterDescription
NN Number of vertices
XXXX X coordinate (signed)
YYYY Y coordinate (signed)
ZZZZ Z coordinate (signed)
TI Texture coordinate index
RR Vertex color red channel
GG Vertex color green channel
BB Vertex color blue channel
… more vertices

Emits:

gsSPVertex(..., NN)

02 level_texture

02 [II]

Loads a CI8 or CI4 texture into TMEM. II indexes the level's texture meta table to obtain the texture's CI/TLUT addresses, format, and dimensions. Texture data is obtained from the level's texture file.

ParameterDescription
II Level texture index

Emits (if the current palette needs to be updated):

gsDPSetTextureImage(...)
gsDPTileSync()
gsDPSetTile(...)
gsSPLoadSync()
gsDPLoadTLUT(...)
gsSPPipeSync()

Emits:

gsDPSetTextureImage(...)
gsDPSetTile(...)
gsDPLoadSync()
gsDPLoadBlock(...)
gsDPPipeSync()
gsDPSetTile(...)
gsDPSetTileSize(...)

03 set_primcolor

03 [RR] [GG] [BB]

Sets the RDP's primcolor register.

Emits:

gsDPSetPrimColor(0, 0, 0, RR, GG, BB)

04 tri1

04 [-aaaaabb] [bbbccccc] (bitwise)

Renders a single triangle.

ParameterDescription
aaaaa RSP vertex index 0
bbbbb RSP vertex index 1
ccccc RSP vertex index 2

Emits:

gsSP1Triangle(aaaaa, bbbbb, ccccc, 0)

05 tri2

05 [-aaaaabb] [bbbccccc] [-dddddee] [eeefffff] (bitwise)

Renders two triangles.

ParameterDescription
aaaaa RSP vertex index 0
bbbbb RSP vertex index 1
ccccc RSP vertex index 2
ddddd RSP vertex index 3
eeeee RSP vertex index 4
fffff RSP vertex index 5

Emits:

gsSP2Triangles(aaaaa, bbbbb, ccccc, ddddd, eeeee, fffff, 0)

06 setcombine0

06

Emits:

gsDPPipeSync()
gsDPSetCombineMode(G_CC_MODULATERGBDECALA, G_CC_PASS2) // FC127FFF FFFFF238

07 setcombine1

07

Emits:

gsDPPipeSync()
gsDPSetCombineMode(PRIMITIVE, 0, SHADE, 0, 0, 0, 0, 1, G_CC_PASS2) // FC327FFF FFFFFC38

08 collision_vertex_list

08 [NN] [XX XX] [YY YY] [ZZ ZZ] […]

Defines a list of collision vertices.

ParameterDescription
NN Number of vertices
XX X position
YY Y position
ZZ Z position
… More vertices

09 update_vertex_texcoord

09 [VI] [TI]

Updates a single vertex's S and T texture coordinate values in the RSP's vertex buffer.

TI indexes the level's texture coordinate table.

ParameterDescription
VI RSP vertex index
TI Texture coordinate index

Emits:

gsSPModifyVertex(VI, G_MWO_POINT_ST, ((table[TI].s / 2) << 16) | (table[TI].t / 2))

0A unknown_dl

0A

Jump to some display list, unknown purpose. The address of the display list is obtained from 801712E8.

Emits:

gsSPDisplayList(...)

0B setcombine2

0B

Emits:

gsDPSetCombineMode(PRIMITIVE, 0, SHADE, 0, 0, 0, 0, 1, G_CC_PASS2) // FC327FFF FFFFFC38

This command seems the same as command 07 but without the pipesync.


0C global_texture

0C [II]

Loads a CI8 texture into TMEM. II indexes the table in the “global texture” bank to obtain the texture's CI/TLUT addresses, dimensions, and data.

ParameterDescription
II Global texture index

Emits (if the current palette needs to be updated):

gsDPSetTextureImage(...)
gsDPTileSync()
gsDPSetTile(...)
gsSPLoadSync()
gsDPLoadTLUT(...)
gsSPPipeSync()

Emits:

gsDPSetTextureImage(...)
gsDPSetTile(...)
gsDPLoadSync()
gsDPLoadBlock(...)
gsDPPipeSync()
gsDPSetTile(...)
gsDPSetTileSize(...)

0D common_texture

0D [II]

Loads a CI8 texture into TMEM. II indexes the table in the level's “common texture” bank to obtain the texture's CI/TLUT addresses, dimensions, and data.

ParameterDescription
II Common texture index

Emits (if the current palette needs to be updated):

gsDPSetTextureImage(...)
gsDPTileSync()
gsDPSetTile(...)
gsSPLoadSync()
gsDPLoadTLUT(...)
gsSPPipeSync()

Emits:

gsDPSetTextureImage(...)
gsDPSetTile(...)
gsDPLoadSync()
gsDPLoadBlock(...)
gsDPPipeSync()
gsDPSetTile(...)
gsDPSetTileSize(...)

0E nop0

(no operation)


0F nop1

(no operation)


Assembly Information

Assembly location of each command:

Command ASM Location
00: end_submesh 800518FC
01: vertex_list 8004FF70
02: level_texture 800500B8
03: set_primcolor 80050AE8
04: tri1 80050B34
05: tri2 80050B84
06: setcombine0 80050C18
07: setcombine1 80050C40
08: collision_vertex_list 80050C6C
09: update_vertex_texcoord 80050D44
0A: unknown_dl 80050DBC
0B: setcombine2 80050DDC
0C: global_texture 80050E20
0D: common_texture 8005136C
0E: nop0 8004FF3C
0F: nop1 8004FF3C