====== OFP Wrp File Format 1WVR ======

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**Operation Flashpoint (OFP)** aka ArmA: Cold War Assault (CWA)


====== General ======

WVR type 1 was released as a OFP CWC demo island

For a general description WVR-WRP file construct, see [[ofp:file_formats:4wvr|WRP - 4WVR]].


====== Conventions ======

[[arma:file_formats:generic_data_types|File format generic data types]] (link to ArmA namespace)


====== Structure ======

<code cpp>
WVR1
{
	WVR1Header  Header;
	Texture     Textures[...];
	Model       Models[...];
	Net         Nets[...];
}
</code>

**WVR1Header**

<code cpp>
WVR1Header // same as WVR4 except for the signature of course
{
	char Signature[4]; //"1WVR"
	ulong Xsize;       //(=128) cell dimension (wvr4 is 256)
	ulong Ysize;       //(=128) cell dimension
}
</code>

**Texture**

<code cpp>
Texture
{
	ushort Elevations  [Ysize][Xsize]; // in centimetres. see 4WVR documentation
	ushort TextureIndex[Ysize][Xsize]; //Each 'index' refers to a filename below. Range 0..255 4WVR is 1..511
	Asciiz TextureFilenames[256][32];  //"LandText\\mo.pac\0LandText.pi.pac.........."
}
</code>
Unlike 4WVR the table is limited to 256 (not 512) entries. Unlike 4WVR the names can be

  * replicated
  * scattered anywhere

Unlike 4WVR there is no dummy, 0 index. the first entry is used. There are 'holes' in the table (eg no strings) where that paa file was removed


====== Elevations ======

Elevations are expressed as an integral of the gridsize.

Since the gridsize for ofp is a fixed 50 meters, to convert the value into meters:
<code cpp>
RealHeight = Elevations[x][y] * 0.05;
</code>


====== TextureIndex ======

Each cell on the map references an texture file (pac/paa) and an elevation for that text at that cell position. Since there could be myriads of 'sea' texture (eg), rather than have each cell list it's texture, it references a texture list via an index. In this way, THE texture which is common to many cells (at sometimes differing elevations) is only stored once.

A max of 256 texture files can be listed. Each is held as an asciiz string inside a fixed 32 byte record. Eg max length of file name is 31 characters.


====== Model ======

<code cpp>
Model// 64 byte structure
{
	XYZTriplet XYZTriplet;       // in gridsize scale. eg *50.0 meters
	float      heading;          // in Cartesian degrees NOT polar radians
	char       P3dModelName[48]; // "Data3d\Smrk.p3d (WVR4 is 76)
}
</code>

  * Unlike wvr4, wvr1 has no object id
  * Unlike wvr4, only the xyz position, and an orientation is supplied. In wvr4, these were replaced by the standard Microsoft 12 float array
  * The XYZ triplet is specified in gridsize. to get real meters, multiply by 50.
  * The Y component (the height) is a relative measurement. eg an offset from the calculated position of the model on the land surface.
  * in all other formats this value is absolute asl. not, relative.
  * Cartesian rotation is clockwise. Polar rottion is counter clock. Therefore, Polar (wrp) degrees = -Cartesian degrees.


====== Net ======

<code cpp>
Net//64 byte structure
{
	NetHeader NetHeader;
	Subnet    SubNets[...];
}
</code>


====== NetHeader ======

<code cpp>
NetHeader
{
	Asciiz     NetName[24]; //"LandText\Silnice.pac" null termed
	ulong      Always;     //0x00cd9100 or 0x00d4c600
	ulong      Always;     //0x00bfd400
	ulong      Always;     //0x00000047
	ulong      Always;     //0x00000000
	ulong      Always;     //0x0069fbb0;
	ulong      Type;       //0,1 or 2
	XYZTriplet XYZTriplet; //[0.152,0.15,0.1] typical
	float      Scale;      //3.5, 4.5 or 5.5
}
</code>
The last NetHeader (eg, last net) contains the NetName "EndOfNets". There are NO subnets.

Endof Nets also marks end of file.


====== Subnet ======

<code cpp>
SubNet
{
	float      X,Y;           //* gridsize of 50
	if (X || Y)
	{
		XYZTriplet Triplet;     //very similar content to header triplet
		float      Stepping;
		ulong      Always;      //0x0046931A
		ulong      Always;      //0x00980778 or 0x733760
	}
}
</code>
A block of subnets continue for each Netheader until X==Y==0

Stepping appears to incrementally increase around 5.0 to each subsequent subnet


====== FilePaths ======

Despite the impression given (lack of a leading \) All file names (pac/paa and p3d files) are hard wired to the (virtual) pboRoot\ directory.

From the very beginning of OFP, this lack of relative addressing has persisted: Making the transfer of models into other addons a difficult.