OBD:M3GM: Difference between revisions
Jump to navigation
Jump to search
m (altered IDXA links) |
("generates its own"? "ignored"? what the?!) |
||
| Line 26: | Line 26: | ||
;Vertex normals | ;Vertex normals | ||
:The first VCRA stores the normals for every vertex (same entries as in PNTA and TXCA). | :The first VCRA stores the normals for every vertex (same entries as in PNTA and TXCA). | ||
:Vertex normals are | :Vertex normals are used by Gouraud shading (directional lighting). | ||
;Face normals | ;Face normals | ||
:The second VCRA stores the normals for every face (groups defined by the second IDXA). | :The second VCRA stores the normals for every face (groups defined by the second IDXA). | ||
:Face normals | :Face normals are used for backface culling. | ||
;Triangle strips | ;Triangle strips | ||
:The first IDXA lists the triangles as strips. The IDs are the ones in PNTA and IDXA. | :The first IDXA lists the triangles as strips. The IDs are the ones in PNTA and IDXA. | ||
| Line 38: | Line 36: | ||
;Face groupings | ;Face groupings | ||
:The second IDXA groups the triangles into faces (oriented by the second VCRA). | :The second IDXA groups the triangles into faces (oriented by the second VCRA). | ||
{{OBD_File_Footer | type=M3GM | prev=M3GA | next=Mtrl | name=Geometry | family=Generic | align=center}} | {{OBD_File_Footer | type=M3GM | prev=M3GA | next=Mtrl | name=Geometry | family=Generic | align=center}} | ||
Revision as of 14:52, 7 February 2008
|
|
| 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 06 | 3 | level 3 |
| 0x08 | int32 | 00 00 00 00 | 0 | unknown; maybe a runtime pointer? |
| 0x0C | link | 01 DA 00 00 | 218 | link to 00218-.PNTA (vertex XYZs) |
| 0x10 | link | 01 F7 00 00 | 247 | link to 00247-.VCRA (vertex normals) |
| 0x14 | link | 01 F0 00 00 | 240 | link to 00240-.VCRA (face normals) |
| 0x18 | link | 01 ED 00 00 | 237 | link to 00237-.TXCA (vertex UVs) |
| 0x1C | link | 01 0C 01 00 | 268 | link to 00268-.IDXA (triangle strips) |
| 0x20 | link | 01 11 01 00 | 273 | link to 00273-.IDXA (face groupings) |
| 0x24 | link | 01 D8 00 00 | 216 | link to 00216-.TXMP (texture) |
| 0x28 | link | 00 00 00 00 | unused | unused link; never used in Oni |
| 0x2C | char[20] | AD DE | dead | unused |
- 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 used by Gouraud shading (directional lighting).
- Face normals
- The second VCRA stores the normals for every face (groups defined by the second IDXA).
- Face normals are used for backface culling.
- 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).
| ONI BINARY DATA |
|---|
| M3GA << Other file types >> Mtrl |
| M3GM : Geometry |
| Generic file |