import struct

instr = struct.Struct("HHHBBBx")
outstr = struct.Struct("IIII")

cnt = 0
with open("sibenik.bin3", "rb") as infile:
  with open("sibenik.vxl", "wb") as outfile:
    infile.read(8)
    while infile:
      data = infile.read(instr.size)
      if not data: break
      (x,y,z,r,g,b) = instr.unpack(data)
      c = r*0x10000 + g*0x100 + b
      outfile.write(outstr.pack(x, y, z, c))
      cnt += 1
print "->", cnt