P3D Lod Sections: Difference between revisions
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{{ | {{Feature|UnsupportedDoc}} | ||
=LodSection= | = LodSection = | ||
LodSection | LodSection | ||
{ | { | ||
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ulong CommonPointsUserValue; // see [[P3D Point and Face Flags]] | ulong CommonPointsUserValue; // see [[P3D Point and Face Flags]] | ||
// 0xC9 -> LodPoints 0x0C90003F | // 0xC9 -> LodPoints 0x0C90003F | ||
// LodPointFlags are in a separate table for arma, and in the VertexTable for ofp (odol7) | // LodPointFlags are in a separate table for arma, and in the VertexTable for {{ofp}} (odol7) | ||
short CommonTextureIndex; // | short CommonTextureIndex; // | ||
ulong CommonFaceFlags; // see [[P3D Point and Face Flags]] | ulong CommonFaceFlags; // see [[P3D Point and Face Flags]] | ||
| Line 37: | Line 37: | ||
==FaceIndexOffsets== | == FaceIndexOffsets == | ||
LodFaces are organised sequentially, in blocks. | LodFaces are organised sequentially, in blocks. | ||
| Line 75: | Line 75: | ||
[[Category:BIS_File_Formats]] | [[Category:BIS_File_Formats]] | ||
{{GameCategory|arma1|File Formats}} | |||
Latest revision as of 15:37, 17 November 2021
Disclaimer: This page describes internal undocumented structures of Bohemia Interactive software.
Bohemia Interactive is not willing to tolerate use of such tools if it contravenes any general licenses granted to end users of this community wiki or BI products.
This page contains unofficial information.
Some usage of this information may constitute a violation of the rights of Bohemia Interactive and is in no way endorsed or recommended by Bohemia Interactive.Bohemia Interactive is not willing to tolerate use of such tools if it contravenes any general licenses granted to end users of this community wiki or BI products.
LodSection
LodSection
{
ulong FaceIndexOffsets[2]; // from / to region of LodFaces used
ulong MaterialIndexOffsets[2]; // ODOLV4x only
ulong CommonPointsUserValue; // see P3D Point and Face Flags
// 0xC9 -> LodPoints 0x0C90003F
// LodPointFlags are in a separate table for arma, and in the VertexTable for Operation Flashpoint (odol7)
short CommonTextureIndex; //
ulong CommonFaceFlags; // see P3D Point and Face Flags
///////// // ODOLV4x only//////
long MaterialIndex;
if MaterialIndex ==-1
{
byte ExtraByte;
}
ulong UnknowLong; // generally 2
float UnknownResolution;
float UnknownResolution2; // generally 1000.0
### V67 ###
ulong UnknownLongValue1
if UnknownLongValue1
{
CollimatorInfo unknown //Vec3,Vec3,ulong,vec3,ulong
}
###########
////////////////////////////////
}
- a Material or Texture index with default value (-1) has no face/material associated with it and consequently the bounds are zero
- In odol7 TextureIndexes and FaceFlags existed for every LodFace in the LodFace Structure, and repeated (as a block) here.
- In Arma they are removed from the LodFaces.
FaceIndexOffsets
LodFaces are organised sequentially, in blocks.
The 1st block of faces use the 1st section and so on.
If there are any faces specified at all (a memory lod doesn't have them), there must be, at least one section in that lod. If it is the only section, it will span the entire lodface structure.
FaceIndexOffsets contain relative memory offsets of the faces used in this section.
Each subsequent section (if any) uses the next, sequential block.
Because Faces contain either triangles, or, quads. The amount of data in each block is variable.
A face quad uses 10 bytes, a face triangle uses 8.
Example:
- this section uses the first two faces of the face structure;
- Face 0 = triangle (8 bytes)
- Face 1 = box (10 bytes)
- Face 2 (if any) next section (if any)
Lower Offset = 0 // ie start of the face structure since this is the 1st section Upper Offser = 8+10 // bytes start of next section (if any) or end of faces
The next section (if any) will contain:
Lower Offset = 8+10 // beginning of this block Upper Offset = 8*nTriangles.ThisBlock+ 10* nQuads.ThisBlock
etc