## NORMAL SECTION ##

import bpy
import os
import random

# NOTE: any references to a mesh's data (e.g. UVs)
# cannot be accessed in edit mode, so we must switch
# to object mode. More info here:
# https://docs.blender.org/api/blender_python_api_2_78_release/info_gotcha.html
bpy.ops.object.mode_set(mode='OBJECT')

# get object context
obj = bpy.context.active_object
mesh = obj.to_mesh(bpy.context.scene, False, 'PREVIEW')

def clamp(n, minval, maxval):
    n = max(min(n, maxval), minval)
    return n
def intizize(n, factor):
    n = int(n*factor)
    return n

# FIXME: use relative file path name
with open('C:\\Documents and Settings\\sveeion\\Desktop\\a.nrm', 'wb') as f:

    norm_all = []
    
    for i, face in enumerate(mesh.tessfaces):
        x = intizize(face.normal[0],4096)
        y = intizize(face.normal[2],4096)
        z = intizize(face.normal[1],4096)
            
        tuple = (x, y, z)
        print(tuple)
        norm_all.append(tuple)
        
    bnum = len(norm_all)*12 + 4
    f.write(bnum.to_bytes(4, byteorder='little', signed=False))
    
    for i in range(len(norm_all)):
        x = norm_all[i][0].to_bytes(4, byteorder='little', signed=True)
        y = norm_all[i][1].to_bytes(4, byteorder='little', signed=True)
        z = norm_all[i][2].to_bytes(4, byteorder='little', signed=True)
        f.write(x+y+z)