kd-tree traversal - avoid dynamic memory allocation
use minimum storage size for KdNode (8B on 32bit cpu)
vector.h - add division operator, fix semicolons
#!/usr/bin/python
# this demo needs buddha model from
# http://graphics.stanford.edu/data/3Dscanrep/
from raytracer import Raytracer, Light, Sphere, Triangle, Material
from plyreader import LoadStanfordPlyFile
import Image
rt = Raytracer()
mat = Material(colour=(0.9, 0.9, 0.9))
mat.setSmooth(True)
LoadStanfordPlyFile(rt, "../models/ply/happy/happy_vrip_res2.ply",
mat, scale=20.0, trans=(0,-3,0))
light = Light(position=(-5.0, 2.0, 8.0), colour=(0.9, 0.3, 0.6))
rt.addlight(light)
imagesize = (800, 600)
data = rt.render(imagesize)
img = Image.fromstring("RGB", imagesize, data)
img.save('buddha.png')