diff -r 4fedf7290929 -r 7c3f38dff082 demos/lworeader.py
--- a/demos/lworeader.py	Sat Apr 19 18:00:27 2008 +0200
+++ b/demos/lworeader.py	Sun Apr 20 16:48:24 2008 +0200
@@ -3,6 +3,7 @@
 from math import *
 from struct import *
 from raytracer import Triangle, NormalVertex, Material
+from vector import dot
 
 def read_int4(f):
 	return unpack('>i', f.read(4))[0]
@@ -153,12 +154,6 @@
 		(ID,size) = read_chunk(f)
 	return (points, faces, tags, surfaces)
 
-def dot(a,b):
-	sum = 0
-	for i in range(min(len(a),len(b))):
-		sum += a[i]*b[i]
-	return sum
-
 def LoadLightwaveLwoFile(rt, filename, scale=(1,1,1), trans=(0,0,0)):
 	if (type(scale) == float or type(scale) == int):
 		scale = (scale,)*3