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| − | {{RW Section|Struct|0x0001}}
| + | #REDIRECT [[Geometry (RW Section)#Structure]] |
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| − | ''This article is about the [[Struct (RW Section)|Struct]] section accompanied by a [[Geometry (RW Section)|Geometry]] parent section.''
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| − | The '''Geometry Struct''' sections can usually be found in [[model file]]s used by the GTA III game trilogy. They are amongst the most important sections inside a <code>.dff</code> file since they contain the actual mesh data. The typical location in the file's section hierarchy is ''[[Clump (RW Section)|Clump]] > [[Geometry List (RW Section)|Geometry List]] > [[Geometry (RW Section)|Geometry]] > Struct''.
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| − | ==Header==
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| − | There is a ''16 byte'' header with section content information:
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| − | 2b - WORD - Flags
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| − | 1b - BYTE - Number of of UV coordinate sets
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| − | 1b - BYTE - Unknown (is set to 1 in PS2 files, otherwise 0)
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| − | 4b - DWORD - Face Count
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| − | 4b - DWORD - Vertex Count (also normals and colors, if included)
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| − | 4b - DWORD - Frame Count
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| − | ;Flags:
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| − | Bit 0: triangle strip (else triangle list)
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| − | Bit 1: vertex positions are included (usually 1)
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| − | Bit 2: UV coordinates are included
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| − | Bit 3: vertex colors are included
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| − | Bit 4: normals are included (0 for most static map objects)
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| − | Bit 5: unknown (''GeometryLight'')
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| − | Bit 6: unknown (''GeometryModulateMaterialColor'')
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| − | Bit 7: multiple sets of UV coordinates are included (see header)
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| − | ==Geometry Data==
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| − | 12b - FLOAT[3] - Scene Lighting Info (ambient, diffuse, specular) - '''only for RW versions < 3.4!'''
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| − | 4b - BYTE[4] - Vertex Colors (RGBA) - '''array''' of <nowiki>[Vertex Count]</nowiki> entries, if flag bit 3 is set
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| − | 8b - FLOAT[2] - UV Coords - '''array''' of <nowiki>[Vertex Count]</nowiki> entries, if flag bit 2 is set;
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| − | multiple blocks if bit 7 is set and the UV set count in the header is > 1
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| − | 8b - WORD[4] - Face Indices (Vert 2, Vert 1, Flags, Vert 3) - '''array''' of <nowiki>[Face Count]</nowiki> entries
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| − | 16b - FLOAT[4] - Bounding Sphere (X, Y, Z, Radius)
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| − | 8b - DWORD[2] - has position, has normals (1 if true; possibly not used)
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| − | 12b - FLOAT[3] - Vertices (X, Y, Z) - '''array''' of <nowiki>[Vertex Count]</nowiki> entries
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| − | 12b - FLOAT[3] - Normals (X, Y, Z) - '''array''' of <nowiki>[Vertex Count]</nowiki> entries, if flag bit 4 is set
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| − | '''Note:''' Face Indices are overridden if there's a [[Bin Mesh PLG (RW Section)|Bin Mesh PLG]] section. This is also used to assign different materials to parts of the mesh.
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| − | '''Note:''' Vertex Colors, UV Coordinates, Face Indices, Vertices, and Normals are omitted in PS2 files, and instead [[Native Data PLG (RW Section)|Native Data PLG]] is used for geometry information.
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| − | ==See also==
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| − | * [http://www.chronetal.co.uk/gta/index.php?page=dff Original DFF format description] by KCow
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