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BSP flags (Quake and GoldSrc)
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Surface flags
Despite having a 32-bit integer available to be used, most flags go unused. Vanilla Quake engines and GoldSrc only use TEX_SPECIAL.
Bit | Flag name | Dev comment | Notes |
---|---|---|---|
0x00000001 | TEX_SPECIAL | sky or slime, no lightmap or 256 subdivision | Surface does not have a lightmap.
Used by |
0x00000002 | TEX_MISSING | johnfitz -- this texinfo does not have a texture | Used by fitzquake and derivatives to indicate a missing texture |
0x00000800 | ??? | N/A | Used by VERTEXNORMALS BSPX lump to indicate a face that should have smooth shading based upon its vertex normals. |
Contents types
Contents are stored as a signed 32-bit integer, and are always negative.
Some entities, such as func_illusionary
and func_water
, allow using the skin
KV to override the contents of the entity.
Value | Internal name | Dev comment | Notes |
---|---|---|---|
-1 | CONTENTS_EMPTY | Non-solid, and doesn't affect VIS. | |
-2 | CONTENTS_SOLID | Default. | |
-3 | CONTENTS_WATER | A liquid, usually water. Textures with the ! prefix are usually water when part of worldspawn, unless they are slime, lava, or a current.
| |
-4 | CONTENTS_SLIME | Like water, deals damage to the player and some monsters when touched. | |
-5 | CONTENTS_LAVA | Like slime, but deals double the damage. | |
-6 | CONTENTS_SKY | ||
-7 | CONTENTS_ORIGIN | removed at csg time | Replaces an entity's origin KV, then is removed by CSG (does not exist in compiled BSP).
In GoldSrc, if a brush has this contents at runtime, it will be treated like water (and is referred to in FGDs as "volumetric light"). |
-8 | CONTENTS_CLIP | changed to contents_solid | |
-9 | CONTENTS_CURRENT_0 | Acts like water combined with a trigger_push with a speed of 2048 in the given direction
| |
-10 | CONTENTS_CURRENT_90 | ||
-11 | CONTENTS_CURRENT_180 | ||
-12 | CONTENTS_CURRENT_270 | ||
-13 | CONTENTS_UP | ||
-14 | CONTENTS_DOWN | ||
-15 | CONTENTS_TRANSLUCENT (not in ![]() |
Like water, but never solid. Despite this, it still affects VIS. | |
-16 | CONTENTS_LADDER (not in ![]() |
Climbable. Usually set via the game code for the func_ladder entity. | |
-17 | CONTENTS_FLYFIELD (not in ![]() |
Zero gravity | |
-18 | CONTENTS_GRAVITY_FLYFIELD (not in ![]() |
||
-19 | CONTENTS_FOG (not in ![]() |
Ambient Types
Ambients are stored as an array of 4 unsigned bytes, indicating volume. Only Quake uses them, and it only uses AMBIENT_SKY and AMBIENT_WATER, which are hardcoded in the engine to play specific sounds when a visleaf containing the given ambient type is in the current PVS.
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