new virtual Shape::intersect_bbox
implementation of triangle-AABB intersection
octree building updated and simplified with help of this new method
octree made default for Python, it's currently much faster than kd-tree (both building and traversal)
#!/usr/bin/python
# this demo needs buddha model from
# http://graphics.stanford.edu/data/3Dscanrep/
import sys
sys.path.append(open('ModulePath').read().strip())
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))
LoadStanfordPlyFile(rt, "../models/happy/happy_vrip_res4.ply",
mat, smooth=True, 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')