gistfile1.txt

import sys
from Struct import Struct as S

class Header(S):
	def __format__(self):
		self.magic = S.string(4)
		self.version = S.uint32
		self.direntries = Direntry()[17]

class Direntry(S):
	def __format__(self):
		self.offset, self.length = S.uint32[2]

class Texture(S):
	def __format__(self):
		self.name = S.string(64, stripNulls=True)
		self.surface_flags = S.uint32
		self.content_flags = S.uint32

class Plane(S):
	def __format__(self):
		self.normal = S.float[3]
		self.dist = S.float

class Node(S):
	def __format__(self):
		self.plane = S.uint32
		self.children = S.uint32[2]
		self.mins = S.uint32[3]
		self.maxs = S.uint32[3]

class Leaf(S):
	def __format__(self):
		self.cluster = S.uint32
		self.area = S.uint32
		self.mins = S.uint32[3]
		self.maxs = S.uint32[3]
		self.leafface = S.uint32
		self.n_leaffaces = S.uint32
		self.leafbrush = S.uint32
		self.n_leafbrushes = S.uint32

class LeafFace(S):
	def __format__(self):
		self.face = S.uint32

class LeafBrush(S):
	def __format__(self):
		self.brush = S.uint32

class Model(S):
	def __format__(self):
		self.mins = S.float[3]
		self.maxs = S.float[3]
		self.face = S.uint32
		self.n_faces = S.uint32
		self.brush = S.uint32
		self.n_brushes = S.uint32

class Brush(S):
	def __format__(self):
		self.brushside = S.uint32
		self.n_brushsides = S.uint32
		self.texture = S.uint32

class BrushSide(S):
	def __format__(self):
		self.plane = S.uint32
		self.texture = S.uint32

class Vertex(S):
	def __format__(self):
		self.position = S.float[3]
		self.texcoords = S.float[4]
		self.normal = S.float[3]
		self.color = S.uint8[4]

class Meshvert(S):
	def __format__(self):
		self.offset = S.uint32

class Effect(S):
	def __format__(self):
		self.name = S.string(64, stripNulls=True)
		self.brush = S.uint32
		self.unknown = S.uint32 # How is this unknown?

class Face(S):
	def __format__(self):
		self.texture, self.effect, self.type = S.uint32[3]
		self.vertex, self.n_vertices = S.uint32[2]
		self.meshvert, self.n_meshverts = S.uint32[2]
		self.lm_index = S.uint32
		self.lm_start = S.uint32[2]
		self.lm_size = S.uint32[2]
		self.lm_origin = S.float[3]
		self.lm_vec_S = S.float[3]
		self.lm_vec_T = S.float[3]
		self.normal = S.float[3]
		self.size = S.uint32[2]

def main(fn):
	def decode(lump, cls):
		size = len(cls())
		fp.seek(header.direntries[lump].offset)
		return [cls(unpack=fp) for i in xrange(header.direntries[lump].length / size)]

	fp = file(fn, 'rb')
	header = Header(unpack=fp)

	fp.seek(header.direntries[0].offset)
	entities = fp.read(header.direntries[0].length)
	#print entities

	textures = decode(1, Texture)
	planes = decode(2, Plane)
	nodes = decode(3, Node)
	leafs = decode(4, Leaf)
	leaffaces = decode(5, LeafFace)
	leafbrushes = decode(6, LeafBrush)
	models = decode(7, Model)
	brushes = decode(8, Brush)
	brushsides = decode(9, BrushSide)
	vertices = decode(10, Vertex)
	meshverts = decode(11, Meshvert)
	effects = decode(12, Effect)
	faces = decode(13, Face)

if __name__=='__main__':
	main(*sys.argv[1:])