assimp/port/PyAssimp/pyassimp/helper.py

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#-*- coding: UTF-8 -*-
"""
Some fancy helper functions.
"""
import os
import ctypes
import structs
import operator
from errors import AssimpError
from ctypes import POINTER
def vec2tuple(x):
"""
Converts a VECTOR3D to a Tuple
"""
return (x.x, x.y, x.z)
def search_library():
"""
Loads the assimp-Library.
result (load-function, release-function)
exception AssimpError if no library is found
"""
#this path
folder = os.path.dirname(__file__)
candidates = []
#test every file
for filename in os.listdir(folder):
library = os.path.join(folder, filename)
try:
dll = ctypes.cdll.LoadLibrary(library)
except:
#OK, this except is evil. But different OSs will throw different
#errors. So just ignore errors.
pass
else:
#get the functions
try:
load = dll.aiImportFile
release = dll.aiReleaseImport
except AttributeError:
#OK, this is a library, but it has not the functions we need
pass
else:
#Library found!
load.restype = POINTER(structs.SCENE)
candidates.append((library, load, release))
if not candidates:
#no library found
raise AssimpError, "assimp library not found"
else:
#get the newest library
candidates = map(lambda x: (os.lstat(x[0])[-2], x), candidates)
return max(candidates, key=operator.itemgetter(0))[1][1:]