from OpenGL.GL import *
import itertools
import numpy as np
import pygame

FLOAT = np.float32
VOXEL_TYPE = np.uint8

def vec(l):
    return np.array(l, dtype=FLOAT)

RED = vec([1.0, 0.0, 0.0, 1.0])
YELLOW = vec([1.0, 1.0, 0.0, 1.0])
GREEN = vec([0.0, 1.0, 0.0, 1.0])

def normalize(v):
    norm = np.linalg.norm(v)
    return v / norm if norm > 0 else v