OBD:M3GM: Difference between revisions

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[[Main Page]] >> [[OBD:Oni Binary Data|Oni Binary Data]] >> [[OBD:File types|File Types]] >> M3GM File
{{OBD_File_Header | type=M3GM | prev=M3GA | next=Mtrl | name=Geometry | family=Generic | align=center}}
 
 
<CENTER>[[OBD:M3GA|<==]] <FONT SIZE=5>M3GM File</FONT> [[OBD:Mtrl|==>]]<BR>
<FONT SIZE=2>Geometry Array - Level and Character File</FONT></CENTER>




----
http://www6.fh-eberswalde.de/user/dkriesch/onistuff/images/m3gm_all.gif
http://www6.fh-eberswalde.de/user/dkriesch/onistuff/images/m3gm_all.gif




{| BORDER=1 WIDTH=100% CELLPADDING=2 CELLSPACING=0
{{Table}}
|- ALIGN=CENTER BGCOLOR="#FFDDBB"
{{OBDth}}
| WIDTH=15% | <B>Hex</B>
{{OBDtr|0x00|res_id|FF0000|01 '''D7 00 00|215| 00215-door_1_0.M3GM}}
| WIDTH=15% | <B>Translation</B>
{{OBDtr|0x04|lev_id|FFFF00|01 00 00 '''00|3 | level 3}}
| WIDTH=70% | <B>Meaning</B>
{{OBDtr|0x08|int32 |FFC8C8|00 00 00 00   |0 | runtime pointer?}}
|- ALIGN=CENTER VALIGN=TOP BGCOLOR="#FFEEDD"
{{OBDtr|0x0C|PNTA|FFFFC8|01 '''DA 00 00|218| link to vertex XYZs: 00218-.[[PNTA]]}}
| BGCOLOR="#FF0000" | 01 D7 00 00
{{OBDtr|0x10|VCRA|FFFFC8|01 '''F7 00 00|247| link to vertex normals: 00247-.[[VCRA]]}}
| 215
{{OBDtr|0x14|VCRA|FFFFC8|01 '''F0 00 00|240| link to face normals: 00240-.[[VCRA]]}}
| ALIGN=LEFT | 00215-door_1_0.M3GM
{{OBDtr|0x18|TXCA|FFFFC8|01 '''ED 00 00|237| link to vertex UVs: 00237-.[[TXCA]]}}
|- ALIGN=CENTER VALIGN=TOP BGCOLOR="#FFEEDD"
{{OBDtr|0x1C|IDXA|FFFFC8|01 '''0C 01 00|268| link to triangle strips: 00268-.[[IDXA]]}}
| BGCOLOR="#FFFF00" | 01 00 00 06
{{OBDtr|0x20|IDXA|FFFFC8|01 '''11 01 00|273| link to face groupings: 00273-.[[IDXA]]}}
| 3
{{OBDtr|0x24|TXMP|FFFFC8|01 '''D8 00 00|216| link to texture: 00216-.[[TXMP]]}}
| ALIGN=LEFT | level 3
{{OBDtr|0x28|res_id|C8FFC8|00 '''00 00 00|unused| never used in Oni}}
|- ALIGN=CENTER VALIGN=TOP BGCOLOR="#FFEEDD"
{{OBDtr|0x2C|unused[20]|C8FFFF|AD DE|dead| blank filler}}
| BGCOLOR="#FFC8C8" | 00 00 00 00
| 0
| ALIGN=LEFT | not used
|- ALIGN=CENTER VALIGN=TOP BGCOLOR="#FFEEDD"
| BGCOLOR="#FFFFC8" | 01 DA 00 00
| 218
| ALIGN=LEFT | link to 00218-.[[OBD:PNTA|PNTA]]
|- ALIGN=CENTER VALIGN=TOP BGCOLOR="#FFEEDD"
| BGCOLOR="#FFFFC8" | 01 F7 00 00
| 247
| ALIGN=LEFT | link to 00247-.[[OBD:VCRA|VCRA]]
|- ALIGN=CENTER VALIGN=TOP BGCOLOR="#FFEEDD"
| BGCOLOR="#FFFFC8" | 01 F0 00 00
| 240
| ALIGN=LEFT | link to 00240-.[[OBD:VCRA|VCRA]]
|- ALIGN=CENTER VALIGN=TOP BGCOLOR="#FFEEDD"
| BGCOLOR="#FFFFC8" | 01 ED 00 00
| 237
| ALIGN=LEFT | link to 00237-.[[OBD:TXCA|TXCA]]
|- ALIGN=CENTER VALIGN=TOP BGCOLOR="#FFEEDD"
| BGCOLOR="#FFFFC8" | 01 0C 01 00
| 268
| ALIGN=LEFT | link to 00268-.[[OBD:IDXA|IDXA]]
|- ALIGN=CENTER VALIGN=TOP BGCOLOR="#FFEEDD"
| BGCOLOR="#FFFFC8" | 01 11 01 00
| 273
| ALIGN=LEFT | link to 00273-.[[OBD:IDXA|IDXA]]
|- ALIGN=CENTER VALIGN=TOP BGCOLOR="#FFEEDD"
| BGCOLOR="#FFFFC8" | 01 D8 00 00
| 216
| ALIGN=LEFT | link to 00216-_DOOR_RL_FLOOR3.[[OBD:TXMP|TXMP]]
|- ALIGN=CENTER VALIGN=TOP BGCOLOR="#FFEEDD"
| BGCOLOR="#C8FFC8" | 00 00 00 00
| 0
| ALIGN=LEFT | not used
|- ALIGN=CENTER VALIGN=TOP BGCOLOR="#FFEEDD"
| BGCOLOR="#C8FFFF" | AD DE
| dead
| ALIGN=LEFT | not used
|}
|}
;Vertices
:XYZ and UV coordinates are stored in parallel (same number of entries in PNTA and TXCA).
;Vertex normals
:The first VCRA stores the normals for every vertex (same entries as in PNTA and TXCA).
:Vertex normals are supposed to be used by Gouraud shading (directional lighting).
:The precomputed normals are apparently ignored by Oni, which generates its own...
;Face normals
:The second VCRA stores the normals for every face (groups defined by the second IDXA).
:Face normals may be used for env-mapping (but vertex normals could also work there).
:The precomputed face normals are apparently ignored by Oni too... didn't check much.
;Triangle strips
:The first IDXA lists the triangles as strips. The IDs are the ones in PNTA and IDXA.
:The start of a new strip is signaled by a high bit in the ID of its first vertex.
:Strips are more optimal for rendering, they are generated when authoring an M3GM.
;Face groupings
:The second IDXA groups the triangles into faces (oriented by the second VCRA).
:Even if the normals are computed at runtime, the group assignment might be used.
:(e.g., if a face normal is defined as the average of the normals of the triangles)




<HR>
----
<CENTER>[[OBD:M3GA|<==]] <B>M3GM File</B> [[OBD:Mtrl|==>]]</CENTER>
{{OBD_File_Footer | type=M3GM | prev=M3GA | next=Mtrl | name=Geometry | family=Generic | align=center}}
<HR>
 
 
[[Main Page]] >> [[OBD:Oni Binary Data|Oni Binary Data]] >> [[OBD:File types|File Types]] >> M3GM File

Revision as of 16:10, 15 August 2007

ONI BINARY DATA
M3GA << Other file types >> Mtrl
M3GM : Geometry
switch to XML:M3GM page
Overview @ Oni Stuff
OBD.png


m3gm_all.gif


Offset Type Raw Hex Value Description
0x00 res_id 01 D7 00 00 215 00215-door_1_0.M3GM
0x04 lev_id 01 00 00 00 3 level 3
0x08 int32 00 00 00 00 0 runtime pointer?
0x0C PNTA 01 DA 00 00 218 link to vertex XYZs: 00218-.PNTA
0x10 VCRA 01 F7 00 00 247 link to vertex normals: 00247-.VCRA
0x14 VCRA 01 F0 00 00 240 link to face normals: 00240-.VCRA
0x18 TXCA 01 ED 00 00 237 link to vertex UVs: 00237-.TXCA
0x1C IDXA 01 0C 01 00 268 link to triangle strips: 00268-.IDXA
0x20 IDXA 01 11 01 00 273 link to face groupings: 00273-.IDXA
0x24 TXMP 01 D8 00 00 216 link to texture: 00216-.TXMP
0x28 res_id 00 00 00 00 unused never used in Oni
0x2C unused[20] AD DE dead blank filler
Vertices
XYZ and UV coordinates are stored in parallel (same number of entries in PNTA and TXCA).
Vertex normals
The first VCRA stores the normals for every vertex (same entries as in PNTA and TXCA).
Vertex normals are supposed to be used by Gouraud shading (directional lighting).
The precomputed normals are apparently ignored by Oni, which generates its own...
Face normals
The second VCRA stores the normals for every face (groups defined by the second IDXA).
Face normals may be used for env-mapping (but vertex normals could also work there).
The precomputed face normals are apparently ignored by Oni too... didn't check much.
Triangle strips
The first IDXA lists the triangles as strips. The IDs are the ones in PNTA and IDXA.
The start of a new strip is signaled by a high bit in the ID of its first vertex.
Strips are more optimal for rendering, they are generated when authoring an M3GM.
Face groupings
The second IDXA groups the triangles into faces (oriented by the second VCRA).
Even if the normals are computed at runtime, the group assignment might be used.
(e.g., if a face normal is defined as the average of the normals of the triangles)


ONI BINARY DATA
M3GA << Other file types >> Mtrl
M3GM : Geometry
Generic file
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