Vmaps

From MaNGOS

Vmaps are used to implement clipping related questions. This is 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 are exported 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 Buildings/dir.

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

Extracted WMO format

The extracted wmo files in the Buildings subdirectory have a special format - they are not to be mixed up with the client internal format.

byte[8] magic "VMAP002"
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