BSP (Source)/Game-Specific: Difference between revisions
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This page documents some game-specific differences in the [[Source BSP File Format|BSP file format]], compared to the format used for the traditional engine branches. | This page documents some game-specific differences in the [[Source BSP File Format|BSP file format]], compared to the format used for the traditional engine branches. | ||
== | == {{game link|Alien Swarm}} and {{game link|Portal 2}} == | ||
Both games use a slightly different <code>dbrushside_t</code> structure: | Both games use a slightly different <code>dbrushside_t</code> structure: | ||
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};</source> | };</source> | ||
== | == {{game link|Left 4 Dead 2}} == | ||
<code>version</code> and <code>filelen</code> in <code>lump_t</code> are swapped: | <code>version</code> and <code>filelen</code> in <code>lump_t</code> are swapped: | ||
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};</source> | };</source> | ||
== | == {{game link|The Ship}} == | ||
Static props use a modified <code>StaticPropLumpV5_t</code> structure, which contains null-padded target name strings. | Static props use a modified <code>StaticPropLumpV5_t</code> structure, which contains null-padded target name strings. | ||
Revision as of 01:12, 6 August 2011
This page documents some game-specific differences in the BSP file format, compared to the format used for the traditional engine branches.
Alien Swarm and 
Portal 2
Both games use a slightly different dbrushside_t structure:
struct dbrushside_t
{
unsigned short planenum; // facing out of the leaf
short texinfo;
short dispinfo; // displacement info (BSPVERSION 7)
byte bevel; // is the side a bevel plane? (BSPVERSION 7)
byte thin; // is a thin side?
};
Left 4 Dead 2
version and filelen in lump_t are swapped:
struct lump_t
{
int version; // lump format version
int fileofs; // offset into file (bytes)
int filelen; // length of lump(bytes)
char fourCC[4]; // lump ident code
};
The Ship
Static props use a modified StaticPropLumpV5_t structure, which contains null-padded target name strings.
struct StaticPropLumpV5_ship_t
{
Vector m_Origin;
QAngle m_Angles;
unsigned short m_PropType;
unsigned short m_FirstLeaf;
unsigned short m_LeafCount;
unsigned char m_Solid;
unsigned char m_Flags;
int m_Skin;
float m_FadeMinDist;
float m_FadeMaxDist;
Vector m_LightingOrigin;
float m_flForcedFadeScale;
char m_TargetName[128];
};
Vampire: The Masquerade – Bloodlines
Version 17 BSP files contain a substantially modified dface_t structure. The known elements are:
MAXLIGHTMAPS changed from 4 to 8 // 4 lightstyle for day + 4 for night = 8 ( nightime lightmapping system )
struct dface_bsp17_t
{
colorRGBExp32 m_AvgLightColor[MAXLIGHTMAPS]; // For computing lighting information
unsigned short planenum;
byte side; // faces opposite to the node's plane direction
byte onNode; // 1 of on node, 0 if in leaf
int firstedge; // we must support > 64k edges
short numedges;
short texinfo;
short dispinfo;
short surfaceFogVolumeID;
byte styles[MAXLIGHTMAPS]; // lighting info
byte day[MAXLIGHTMAPS]; // Nightime lightmapping system
byte night[MAXLIGHTMAPS]; // Nightime lightmapping system
int lightofs; // start of [numstyles*surfsize] samples
float area;
int m_LightmapTextureMinsInLuxels[2];
int m_LightmapTextureSizeInLuxels[2];
int origFace; // reference the original face this face was derived from
unsigned int smoothingGroups;
};
The extra data seems to be related to lighting of the face, and makes the length of the structure 104 bytes per face. Both the face lump and the original face lump in version 17 files use this structure.