// Mongoose, Terms in this file related to what we use:
//  Int   :  unsigned short  : bitu16
//  Dword :  unsigned int    : bitu32
//
// Also, I'm appending TP's findings to the format

*******************************************************
      TR4 Possible File Format
rgbold March '01

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

Dword "TR4",0
Int   number of RoomTextures?
Int   number of OtherTextures?
Int   number of BumpMapTextures?
Dword UncompressedSize1
Dword CompressedSize1
TextureBlock1
Dword UncompressedSize2
Dword CompressedSize2
TextureBlock2
Dword UncompressedSize3
Dword CompressedSize3
TextureBlock3

/// Other data follows after textures structures are same as TR3 except
    where noted

NOTES:
Texture needs to be masked with 0xfff (high 4 bits are flags)


Room Lights now 46 bytes:

TR4_RoomLight //
  //Follows a D3D light structure, I think, could be wrong

  Dword Xposition  // world coords
  Dword Yposition  // world coords
  Dword Zposition  // world coords
  TR2_Color        // three bytes rgb values
  bitu8 LightType  // same as D3D (i.e. 2 is for spotlight)
  bitu8 unknown    // always 0xff?
  byte  Intensity
  float In
  float Out
  float Length
  float Cutoff
  floats X,Y,Z    //direction??


Before SoundSources is a new field for Flyby_Camera data
bitu32 Number_of_FBCameras
followed by data for each camera. Data field is 40 bytes.
[Andy had previously stated NumXYZ as a new field incorrectly.
His NumXYZ field was the SoundSources in normal structure format]


Cinematic Frames now 24 bytes

There are no colored rectangles or triangles in mesh data.
Mesh Rectangles and Triangles now
  MeshRects: v0,v1,v2,v3,texture,int unknown
  MeshTris:  v0,v1,v2,texture,int unknown
Texture Objects now preceeded by TEX/0 (4bytes)
Object Textures now 38 bytes vice 20
Tile is now a bitu32 vice bitu16 seems need to mask with 0xff as other
       bits are flags. Seems bit15 set means triangle.
In the texture coords now 0 is used for low value vice 1
The extra 16 bytes are at the end of ObjectTexture structure

Attributes using 1 or 2 for transparent. 2 used for 2 sided textures
               (water surface,etc)


Animation now 40 vice 32 bytes. extra 8 seem to be zero right before
/after the old 8 unknowns

"SPR"  3 byte ascii before sprite textures

There are no 8bit or 16 bit palettes (no colored rects or tris)
No lightmap
No 8bit textures
Following level data are Riff Wave Formats.

Lara 2 meshes , skin and joints.



#############################################################################
#
#        TR5 Possible File Format
#        rgbold March '01
#
#############################################################################


// Header ///////////////////
Dword "TR4",0

// Textures /////////////////
Int   number of RoomTextures?
Int   number of OtherTextures?
Int   number of BumpMapTextures?
Dword UncompressedSize1
Dword CompressedSize1
TextureBlock1
Dword UncompressedSize2
Dword CompressedSize2
TextureBlock2
Dword UncompressedSize3
Dword CompressedSize3
TextureBlock3

/// Follows after textures


32 bytes unknown //mostly zero
Dword SizeData    // size of file to Riffs
Dword SizeData    // repeat of above
Dword Unknown     // seems always zero
Dword NumberRooms // number of rooms this level

{ Following Repeats for each Room in level

Dword "XELA" (someone named Alex or "dirX Enhanced Level Archive"
Dword size //size to next XELA block
Dword CDCDCDCD

Block1 60 bytes
{

Dword ublock1 //mostly: start of "XELA" +216 + ublock1 = FD end,
                but have seen 0xffffffff. Better using next data
                and compute FD size the old way of X*Z*8
Dword ublock2 //  start of "XELA" + 216 + ublock2 = FD start
Dword ublock3 // unknown
Dword ublock4 // possibly start of "XELA" + 216 + ublock4 = end portals

Dword Room X      // room's x position in world coords
Dword unknown1    // always seems to be 0000
Dword Room Z      // room's z position in world coords
Dword Ybottom     // room's y bottom positon in world coords
Dword Ytop        // room's y top positon in world coords

Int  NumZSectors // number of z sectors
Int  NumXSectors // number of x sectors

tr2_color4        // 4 bytes color info rgba

Int  NumLights
Int  NumStaticMeshes

Dword Unknown2    // seems always 0x0001
Dword Unknown3    // seems always 0x7fff
Dword Unknown4    // seems always 0x7fff

}close 60 byte block

Dword CDCDCDCD
Dword CDCDCDCD

20 byte block
{
6 bytes 0xff
Int Room_Flag    //room attributes (rain,etc)
Int unknown5
10 bytes 0x00
} close 20 byte block

Dword CDCDCDCD

16 byte block
{
unknown 16 bytes
}close 16 byte block

Dword CDCDCDCD
Dword CDCDCDCD
Dword CDCDCDCD
Dword CDCDCDCD

Dword Unknown6

Dword CDCDCDCD

56 byte block
{
Dword NumberTriangles
Dword NumberRectangles
Dword Unknown7 // always 0x0000 ??
Dword LightSize // number lights times 88 bytes
Dword NumberLights
Dword NumUnknown_36_byte_struct
Dword Unknown9
Dword Unknown10
Dword NumberLayers //TR5 'layers' room pieces
Dword Unknown11    // start of "XELA" + 216 + Unknown11 = start of 
layer 
info
Dword Unknown12    // start of "XELA" + 216 + Unknown12 = start of 
vertices
Dword Unknown13    // start of "XELA" + 216 + Unknown13 = start of 
rect/tri
Dword Unknown14    // same as Unknown13???
Dword Unknown15    // start of vertices + Unknown15 = start of next 
"XELA"
}close 56 byte block

Dword CDCDCDCD
Dword CDCDCDCD
Dword CDCDCDCD
Dword CDCDCDCD

// Lights //////////////////////////
if lights then 85 bytes light data followed by CDCDCD for each light

// Unknown /////////////////////////
if NumUnknown_36_byte_struct then read them too

// Sectors /////////////////////////
Sector Data (sectors times 8 bytes) normal sector data structure

// Portals /////////////////////////
Int NumberDoors

NumberDoors times 32 bytes (normal portal structure)

Int CDCD

// Static meshes //////////////////
if StaticMeshes than numberofstatics times 20 bytes each (normal 
structure)


// Layers ////////////////////////
Layer Data blocks. 56 bytes each.
{
   Dword NumberVertices
   Int  Unknown16
   Int  NumberRectangles
   Int  NumberTriangles

   unknown 46 bytes // was 48 in older docs

}close Layer Data block

following the Layer Data block are:
  rectangles for Layer1 // see format under NOTES
  triangles  for Layer1 // see format under NOTES
  rectangles for Layer2
  triangles  for Layer2

  ...and so on untill all layers are done

after the rectangle and triangle information are the room vertices
which are described under NOTES


}Close Rooms Loop


NOTES:

Room Vertices are 28 bytes each
3 floats representing the x,y,z values of vertex
3 floats probably the vertex normals
1 DWORD  probably diffuse color for the vertex

Rectangles are same old format of V0,V1,V2,V3,Texture, followed by
Int unknown, usually zero.
Texture needs to be masked with 0xfff (high 4 bits are flags)

Triangles are same old format of V0,V1,V2,Texture, followed by
Int unknown, usually zero.
Texture needs to be masked with 0xfff (high 4 bits are flags)

TR5 uses D3D extensively. The light format is a prime example. The last
byte in the light field before the CDCDCD is the light type which in
D3d is 1,2, or 3 for point, spot, or directional lights respectively.
Also somewhere in the unknowns must be the fog values.

Sound Map is now 900 bytes

Before SoundSources is a new field for Flyby_Camera data
bitu32 Number_of_FBCameras
followed by data for each camera. Data field is 40 bytes.
[Andy had previously stated NumXYZ as a new field incorrectly.
His NumXYZ field was the SoundSources in normal structure format]


Cinematic Frames now 24 bytes

There are no colored rectangles or triangles in mesh data.
Mesh Rectangles and Triangles now same format as room rects and tris,
MeshRects: v0,v1,v2,v3,texture,int unknown
MeshTris:  v0,v1,v2,texture,int unknown
Texture Objects now preceeded by TEX/0 (4bytes)
Object Textures now 38 bytes vice 20
Tile is now a bitu32 vice bitu16 seems need to mask with 0xff as other
       bits are flags. Seems bit15 set means triangle.
In the texture coords now 0 is used for low value vice 1
The extra 16 bytes at the end of ObjectTexture structure are 4 Dword
       coords, UV?.
Attributes using 1 or 2 for transparent. 2 used for 2 sided textures
               (water surface,etc)


Animation now 40 vice 32 bytes. extra 8 seem to be zero right before
/after the old 8 unknowns

"SPR"  3 byte ascii before sprite textures

As TR4 there are no 8bit or 16 bit palettes (no colored rects or tris)
No lightmap
No 8bit textures
3 blocks of zlib compressed textures (32bit,16bit,sprite/misc)before
level data.
Level data not compressed.

Following level data are Riff Wave Formats.

Lara 2 meshes as TR4, skin and joints.

also , I was just reading thru the rectanges and triangles and
thought the vertices always followed right after but appears
that sometimes there is a 'pad' int of 0xCDCD.


  Also as Michiel has just posted the Object Textures for TR5 are
40bytes, sorry about that.






************************************************************

          Good Luck,
                       Roy...