VMap Files

VMAPS

Vmaps stands for MaNGOS WoW Vertex Map Physics Info and are used to implement vertical clipping related issues. They are required for spells, which require the caster to have its target in line of sight and random movement generators (fear for example).

They are extracted from the client and will be stored in a MaNGOS own format.

Generation

The generation takes place in two steps.

First, all important WMO files are exported from the MPQ files and written to the buildings subdirectory.

Additionally a file containing information about the positions of these WMOs in the world is generated from ADT files and will be written to the buildings folder.

In a second step, these information are assembled to .vmap and .vmdir file.

Extracted WMO format

The extracted wmo files in the Buildings subdirectory have a special format - they arenot to be mixed up with the client internal format of the same name.

byte[8] magic "VMAPxxx"
uint32 nVectors
uint32 nGroups
nGroups times:
uint32 liqudflags
uint32 "GRP "
uint32 moba_size
uint32 moba_batch
uint32 mobaex
uint32 "INDX"
uint32 wsize
uint32 nIndexes
nIndexes times:
float[3] movt
uint32 "VERT"
uint32 wsize
uint32 nVertices
nVertices times:
float[3] vertice
uint32 "LIQU"
uint32 LiqExsize
uint32 hlq_xverts
uint32 hlq_yverts
LiquidEx_size/4 times:
float LiquidEx