Difference between revisions of "Legacy:T3D File"

Revision as of 03:33, 2 January 2009

The T3D file format or Unreal Text File holds a text list of Unreal map objects. An entire map can be saved as this file format, or just a single actor or brush.

Note that while brushes, their applied textures and light actors are saved, the Unreal Geometry itself is not saved: upon importing a T3D file the map must be built.

Copying objects from UnrealEd and pasting into a text editor produces the same format.

Unreal Text format

Exported brushes and (other) actors. See T3D file.

• Created by:
  • UnrealEd's File -> Import command
  • UnrealEd's Brush -> Import command (see Data Import and Export for more on both these commands).
  • is this created by external stuff too?

Exporting T3D

• Export the whole map: File -> Export...
• export one brush:
• export a part of a map: either save, delete discards and export as above, or select, copy, paste into a text editor and save as a T3D file

Importing T3D

File -> Import...

(note importing may take a LONG time)

Overheard on #utjb... :-)

<tarquin> t3d stores brushes & actors but not texturing, right?
<Mychaeel> Texturing as well.
(melds into the opening speech from Reservoir Dogs...)
<DaveA>Stores links to textures, and texture transforms, but not the pixels themselves

The T3D format is a text file which stores information about map actors. It's in fact identical to what can be copied from UnrealEd to a text editor. An exported map looks like this:

Begin Map
Begin Actor Class=LevelInfo Name=LevelInfo0
    TimeSeconds=17.008888
    Summary=LevelSummary'Entry.LevelSummary'
    DefaultGameType=Class'Botpack.UTIntro'
    AIProfile(0)=23784352
    AIProfile(1)=52
    AIProfile(2)=41
    AIProfile(3)=42
    AIProfile(4)=40
    AIProfile(5)=44
    AIProfile(6)=45
    AIProfile(7)=21846171
    AvgAITime=0.000000
    Level=LevelInfo'Entry.LevelInfo0'
    Tag=LevelInfo
    Region=(Zone=LevelInfo'Entry.LevelInfo0',iLeaf=-1)
    Name=LevelInfo0
End Actor
Begin Actor Class=Brush Name=Brush0
    MainScale=(SheerAxis=SHEER_ZX)
    PostScale=(Scale=(X=0.250000,Y=8.000000,Z=3.000000),SheerAxis=SHEER_ZX)
    TempScale=(Scale=(X=0.250000,Y=8.000000,Z=3.000000),SheerAxis=SHEER_ZX)
    Level=LevelInfo'Entry.LevelInfo0'
    Tag=Brush
    Region=(Zone=ZoneInfo'Entry.ZoneInfo0',iLeaf=1,ZoneNumber=1)
    Location=(X=464.000000,Y=-16.000000,Z=64.000000)
    Begin Brush Name=Brush
       Begin PolyList
          Begin Polygon Item=OUTSIDE Texture=black1 Flags=4194304 Link=0
             Origin   -00160.000000,+00000.000000,+00128.000000
             Normal   +00000.000000,+00000.000000,+00001.000000
             TextureU +00004.000000,+00000.000000,+00000.000000
             TextureV +00000.000000,+00004.000000,+00000.000000
             Vertex   -00128.000000,-00128.000000,+00128.000000
             Vertex   +00128.000000,-00128.000000,+00128.000000
             Vertex   +00128.000000,+00128.000000,+00128.000000
             Vertex   -00128.000000,+00128.000000,+00128.000000
          End Polygon
          ...
       End PolyList
    End Brush
    Brush=Model'Entry.Brush'
    Name=Brush0
End Actor
Begin Actor Class=PlayerStart Name=PlayerStart0
    Level=LevelInfo'Entry.LevelInfo0'
    Tag=PlayerStart
    Region=(Zone=ZoneInfo'Entry.ZoneInfo0',iLeaf=1,ZoneNumber=1)
    Location=(X=183.134430,Y=-987.334167,Z=33.978027)
    OldLocation=(X=-217.561523,Y=-44.538128,Z=-87.899948)
    Name=PlayerStart0
End Actor
...
End Map

External link: http://unreal.jall.org/tutorials/t3d.html (new URL)

Loading T3D brush geometry

You must parse those informations correctly: PrePivot, Location, Rotation, MainScale, PostScale, TempScale, Polygon / Vertexes

FOR each vertex of each polygon of parsed brush DO:
   do MainScale ... x *= MainScale[x], y *= MainScale[y], z *= MainScale[z]
   do translation (-PrePivot[x], -PrePivot[y], -PrePivot[z])
   do rotation Yaw, Pitch, Roll
   do PostScale ... x *= PostScale[x], y *= PostScale[y], z *= PostScale[z]
   do TempScale ... x *= TempScale[x], y *= TempScale[y], z *= TempScale[z]
   do translation (Location[x], Location[y], Location[z])
ENDFOR

Note: For Unreal Engine 3.x based maps (Unreal Tournament 2004 and 2003),PostScale,MainScale,TempScale and Rotation values are always null as the editor automatically updates vertices,origin and normal values when scaling up/down or rotating a brush.

Rotation matrix are the following:

Roll Matrix-X Axis:
1, 0, 0, 0,
0, cos(roll),-sin(roll), 0,
0, sin(roll),cos(roll), 0,
0, 0, 0, 1

Pitch Matrix-Y Axis:
cos(pitch), 0, sin(pitch), 0,
0, 1, 0, 0,
-sin(pitch), 0,cos(pitch), 0,
0, 0, 0, 1)

Yaw Matrix-Z Axis:
cos(yaw), sin(yaw), 0, 0,
-sin(yaw), cos(yaw), 0, 0,
0, 0, 1, 0,
0, 0, 0, 1

Global Rotation Matrix=(Roll Matrix)*(Pitch Matrix)*(Yaw Matrix)

Yaw, Roll and Pitch values are in radians. Original values from t3d files are in "Unreal format" where 2 rad = 65536. For more information about Yaw, Pitch, Roll rotation matrix see http://mathworld.wolfram.com/EulerAngles.html.

Unknown (correct) effect: SheerAxis

Texturing information:
Texture U and Texture V: contains information about scaling
PanU and PanV: only used in Unreal Tournament
Origin: where the texture is centered
Normal: normally, the perpendicular vector of the surface where the texture is applied.

TextureU, TextureV, PanU, PanV, Origin and Normal are informations about how to apply texture for the polygon.

File:TextureInfoT3DBrush
Texture Scaling can be found using this formula:

TexScaleX=1/(TextureU_x²+TextureV_x²)
TexScaleY=1/(TextureU_y²+TextureV_y²)
TexScaleZ=1/(TextureU_z²+TextureV_z²)

Python T3D loader (doesn't care about texture informations): http://carolina.mff.cuni.cz/~gib/ut_utils/unreal_t3d_loader.zip see readme.txt in zip file

Scaling up/down whole map

This operation is mainly needed when you want to port Unreal 1 or Unreal Tournament map to Unreal Tournament 2004 or Unreal Tournament 3.

To do so,considering ScaleFactor:

For each actor in T3D File
set Location = ScaleFactor*Location
set PrePivot = ScaleFactor*PrePivot
If Actor==Brush
  For each polygon
    set Origin = ScaleFactor*Origin
    For each vertex
      set Vertex = ScaleFactor*Vertex
If Actor==StaticMesh
  set DrawScale3D = ScaleFactor*DrawScale3D

Usually scale factor values: Unreal 1/Unreal Tournament to UT2003/UT2004/UT3: 1.25

T3D Utilities

• MapScale scales an entire .t3d file
• MeshMaker converts a prefab in .t3d format to a decoration
• UnrealROC converters: from 3DMF, to VRML/X3D/OBJ (including textures et al).

Related Topics

• Data Import and Export
• Brush Exporting And Importing
• Brush Hacking

Kefik: There can be also a tag 'CsgOper' which have one of two values ... 'CSG_Subtract' -> subtract the brush from space or 'CSG_Add' -> add this brush to shape.

Sobiwan: New to WIKI editing, but not using it. I was searching for the actual format of T3D and found Mongo's description of Planetunreal to be extremely helpful. I'll ask him (mongo@planetunreal.com) if we can use and/or edit his description here. The format is much more involved than described here. We can even supply examples of how to do particular hacks.

MadNad: Interestingly, I was able to convert a Quake3_Level into a unreal map. Quite interesting. First i converted a *.bsp to a *.map in quake, then I made a level that was just a huge cube and converted it to *.t3d. With an external app (i'll have to find the name of it ) I was able to merge these two together. After some scaling and switching additive brushes in quake to subtractive brushes in ued and subtractive to additive, I compiled and had q3dm7 geometry. I don't necessarily recommend doing this, as it will take more time to fix than create it from scratch, but I thought I would share a little experience I had with this.