Формат Source Engine BSP

struct dheader_t
{
int ident; // BSP file identifier

int version; // BSP file version
lump_t lumps[HEADER_LUMPS]; // lump directory array
int mapRevision; // the map's revision (iteration, version) number
};

IDBSPHEADER (('P'<<24)+('S'<<16)+('B'<<8)+'V') //little-endian 'VBSP';

struct lump_t
{
int fileofs; // offset into file (bytes)
int filelen; // length of lump(bytes)
int version; // lump format version
char fourCC[4]; // lump ident code
};

Lump: Name: Purpose:
0 Entities Map entities
1 Planes Plane array
2 Texdata Index to texture names
3 Vertexes Vertex array
4 Visibility Compressed visibility bit arrays
5 Nodes BSP tree nodes
6 Texinfo Face texture array
7 Faces Face array
8 Lighting Lightmap array
9 Occlusion Occlusion data(?)
10 Leafs BSP tree leaf nodes
11 Unused
12 Edges Edge array
13 Surfedges Index of edges
14 Models Brush models (geometry of brush entities)
15 Worldlights Light entities
16 LeafFaces Index to faces in each leaf
17 LeafBrushes Index to brushes in each leaf
18 Brushes Brush array
19 Brushsides Brushside array
20 Areas Area array
21 AreaPortals Portals between areas
22 Portals Polygons defining the boundary between adjacent leaves(?)
23 Clusters Leaves that are enterable by the player
24 PortalVerts Vertices of portal polygons
25 Clusterportals Polygons defining the boundary between adjacent clusters(?)
26 Dispinfo Displacement surface array
27 OriginalFaces Brush faces array before BSP splitting
28 Unused
29 PhysCollide Physics collision data(?)
30 VertNormals Vertex normals(?)
31 VertNormalIndicies Vertex normal index array(?)
32 DispLightmapAlphas Displacement lightmap data(?)
33 DispVerts Vertices of displacement surface meshes
34 DispLightmapSamplePos Displacement lightmap data(?)
35 GameLump Game-specific data lump
36 LeafWaterData (?)
37 Primitives (?)
38 PrimVerts (?)
39 PrimIndices (?)
40 Pakfile Embedded uncompressed-Zip format file
41 ClipPortalVerts (?)
42 Cubemaps Env_cubemap location array
43 TexdataStringData Texture name data
44 TexdataStringTable Index array into texdata string data
45 Overlays Info_overlay array
46 LeafMinDistToWater (?)
47 FaceMacroTextureInfo (?)
48 DispTris Displacement surface triangles
49 PhysCollideSurface Physics collision surface data(?)
50-64 Unused

struct dplane_t
{
Vector normal; // normal vector
float dist; // distance from origin
int type; // plane axis identifier
};

struct Vector
{
float x;
float y;
float z;
};

F(x, y, z) = Ax + By + Cz + D

struct dedge_t
{
unsigned short v[2]; // vertex indices
};

struct dface_t
{
unsigned short planenum; // the plane number
byte side; // faces opposite to the node's plane direction
byte onNode; // 1 of on node, 0 if in leaf
int firstedge; // index into surfedges
short numedges; // number of surfedges
short texinfo; // texture info
short dispinfo; // displacement info
short surfaceFogVolumeID; // ?
byte styles[4]; // switchable lighting info
int lightofs; // offset into lightmap lump
float area; // face area in units^2
int LightmapTextureMinsInLuxels[2]; // texture lighting info
int LightmapTextureSizeInLuxels[2]; // texture lighting info
int origFace; // original face this was split from
unsigned short numPrims; // primitives
unsigned short firstPrimID;
unsigned int smoothingGroups; // lightmap smoothing group
};

{
byte unknown[32];
unsigned short planenum;
byte side;
byte onNode;
int firstedge;
short numedges;
short texinfo;
short dispinfo;
byte unknown[50];
int origFace;
unsigned int smoothingGroups;
};

struct dbrush_t
{
int firstside; // first brushside
int numsides; // number of brushsides
int contents; // contents flags
};

CONTENTS_EMPTY 0 // No contents
CONTENTS_SOLID 0x1 // an eye is never valid in a solid
CONTENTS_WINDOW 0x2 // translucent, but not watery (glass)
CONTENTS_AUX 0x4
CONTENTS_GRATE 0x8 // alpha-tested "grate" textures. Bullets/sight pass through, but solids don't
CONTENTS_SLIME 0x10
CONTENTS_WATER 0x20
CONTENTS_MIST 0x40
CONTENTS_OPAQUE 0x80 // things that cannot be seen through (may be non-solid though)
CONTENTS_TESTFOGVOLUME 0x100 // can see into a fogvolume (water)
CONTENTS_MOVEABLE 0x4000
CONTENTS_AREAPORTAL 0x8000
CONTENTS_PLAYERCLIP 0x10000
CONTENTS_MONSTERCLIP 0x20000
CONTENTS_CURRENT_0 0x40000
CONTENTS_CURRENT_90 0x80000
CONTENTS_CURRENT_180 0x100000
CONTENTS_CURRENT_270 0x200000
CONTENTS_CURRENT_UP 0x400000
CONTENTS_CURRENT_DOWN 0x800000
CONTENTS_ORIGIN 0x1000000 // removed before bsping an entity
CONTENTS_MONSTER 0x2000000 // should never be on a brush, only in game
CONTENTS_DEBRIS 0x4000000
CONTENTS_DETAIL 0x8000000 // brushes to be added after vis leafs
CONTENTS_TRANSLUCENT 0x10000000 // auto set if any surface has trans
CONTENTS_LADDER 0x20000000
CONTENTS_HITBOX 0x40000000 // use accurate hitboxes on trace

struct dbrushside_t
{
unsigned short planenum; // facing out of the leaf
short texinfo; // texture info
short dispinfo; // displacement info
short bevel; // is the side a bevel plane?
};