remove forgotten noise.h includes
common_ply.h: ignore invalid faces with duplicated points
(this solves visual flaws in dragon model)
extend loadShape for loading triangles
realtime_dragon.cc demo: add kd-tree dump/load functionality,
add colored perlin cloud texture
from math import *
def dot(a,b):
sum = 0
for i in range(min(len(a),len(b))):
sum += a[i]*b[i]
return sum
def cross(a,b):
return (
a[1]*b[2] - a[2]*b[1],
a[2]*b[0] - a[0]*b[2],
a[0]*b[1] - a[1]*b[0]
)
def unit(a):
m = mag(a)
return (a[0]/m, a[1]/m, a[2]/m)
def mag(a):
return sqrt(mag2(a))
def mag2(a):
return a[0]*a[0] + a[1]*a[1] + a[2]*a[2]