Heres a script I wrote to export objects to my 3D engine (Gumball).

Will export all selected objects at their current frame.

All materials must be multi/sub with a bitmap in the diffuse slot and all faces must have a valid material ID.

if selection.count > 0 then(
 output_name = getSaveFileName caption:"Gumball Model" types:"Gumball Model (*.gbm)|*.gbm|All Files (*.*)|*.*|"
 if output_name != undefined then(
  output_file = createfile output_name
  num_objects = 0
  for obj in selection do(
  num_objects = num_objects + 1
  )
  format "%\n" num_objects  to:output_file
  for obj in selection do(
   dump1 = undefined
   dump1 = copy obj
   dump1.name = obj.name
   snapshotasmesh dump1
   convertToMesh dump1
   num_verts = dump1.numverts
   num_faces = dump1.numfaces
   num_tverts = dump1.numtverts
   at time animationrange.start format "% % % % %\n" obj.name dump1.material.numsubs num_faces num_verts num_tverts  to:output_file
   for v = 1 to dump1.material.numsubs do(
    matid = dump1.material.materialIDList[v]
    mat = dump1.material.materialList[v].diffuseMap
    if mat != undefined then(
     mat = filenameFromPath mat.filename
     format "% %\n" matid mat to:output_file
    )
    else (
     format "% NULL\n" matid  to:output_file
    )
   )
   for v = 1 to num_faces do(
       mat = getFaceMatID dump1 v
    p = getFace dump1 v;
    x = p.x as Integer -1;
    y = p.y as Integer -1;
    z = p.z as Integer -1;
    tvert = getTVFace dump1 v
    tx = tvert[1] as integer -1;
    ty = tvert[2] as integer -1;
    tz = tvert[3] as integer -1;
    format "% % % % % % %\n" x y z tx ty tz mat to:output_file
   )
   for v = 1 to num_verts do(
    p = getVert dump1 v;
    x = p.x as Float;
    y = p.y as Float;
    z = p.z as Float;

    format "% % %\n" x y z to:output_file
   )
   for v = 1 to num_tverts do(
    p = getTVert dump1 v;
    u = p.x as Float;
    v = p.y as Float;

    format "% %\n" u v to:output_file
   ) 
   delete dump1
  )
  close output_file
  edit output_name
 )
)

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--Matt