multiprocessing Mesh python script

lukeiamyourfather在http://resources.realflow.com上面共享了他的Multithreaded Mesh Proces腳本，這個腳本是用來實現realflow的多線程輸出mesh，雖然realflow的nogui模式有"-threads"這個參數，但你會發現即使你指定了"n"個線程，也是沒什麼不同的，不管是版4還是版本5，lukeiamyourfather的這個腳本很好的解決了這個問題，他把真正的多線程引入到了realflow的mesh輸出。
但是他這個腳本是基於python 3.x來寫的，你必須使用python 3.x，不然會出錯，因爲他用到的一些模塊在3.x版本里改名了，如果需要用2.6來運行必須將名稱改回來。
參考他的腳本，我使用multiprocessing模塊也寫了一個，multiprocessing在2.6時被歸入了標準庫，這樣3.x版本應該也能用（我沒裝，所以沒試過），不同的是我這個腳本開始的輸出信息可能會有點亂，而他的不會(他加了很多鎖，我一個也沒)，其它的基本一致，我試過對比兩個腳本的速度，很接近。

"""
#####################################
##                                 ##
##  multiprocessingMesh v0.1       ##
##  Author: Mack Stone             ##
##  Date: 2011/01/22               ##
##  Email: [email protected]     ##
##  blog: http://schi.iteye.com  ##
##                                 ##
#####################################
"""
import multiprocessing
import time
import subprocess
import sys, os

# realflow install path
# realflow安裝路徑，你可能要改它
realflowRootPath = r'C:\Program Files\Next Limit\RealFlow 5'

# print time info
# 輸出時間信息
timeInfo = lambda *args: str(time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(time.time())))

# Dump subprocess output to /dev/null to keep the terminal window output clean
# 爲了讓命令行窗口顯得乾淨點
outPut = open('NUL')

# multiprocess class
# 我要輸出我想要的信息，所以重寫Process
class MeshProcess(multiprocessing.Process):
    def __init__(self, func, args, name=''):
        super(MeshProcess, self).__init__()
        self.name = name
        self.func = func
        self.args = args

    def run(self):
        print '>%s -->' % timeInfo(), 'Starting', self.name
        self.res = self.func(*self.args)
        print '>>%s -->' % timeInfo(), self.name, 'exited'

# start realflow to process mesh
# 使用realflow進行mesh
def processMesh(q, scene, thread):
    while not q.empty():
        startFrame, endFrame = q.get()
        print '>%s -->' % timeInfo(), 'Thread %d starting meshing frame %d - %d' % (thread, startFrame, endFrame)
        subprocess.Popen('realflow.exe -nogui -threads 1 -mesh -range %s %s "%s"' % (startFrame, endFrame, scene), 
                         stdout=outPut, stderr=outPut, shell=True, cwd=realflowRootPath).wait()
        print '>%s -->' % timeInfo(), 'Thread %d finished meshing frame %d - %d' % (thread, startFrame, endFrame)

def main(args):
    helpText = r"""#####################################
##                                 ##
##  multiprocessingMesh v0.1       ##
##  Author: Mack Stone             ##
##  Date: 2011/01/22               ##
##  Email: [email protected]     ##
##  blog: http://schi.iteye.com  ##
##                                 ##
#####################################

usage: C:\Python26\python.exe multiprocessingMesh.py startFrame endFrame threadCount sceneFile
Example: C:\Python26\python.exe multiprocessingMesh.py 0 100 8 C:\test\test.flw
"""
    # if argv not right print out help
    # 輸出幫助信息
    if len(args) < 4 or not os.path.isfile(args[3]):
        print helpText
        return 0

    startFrame = int(args[0])
    endFrame = int(args[1])
    threads = int(args[2])
    sceneFile = r'%s' % args[3]

    # Populate frameList for each threads
    # 計算幀列表
    frameList = []
    incr = (endFrame + 1) / (threads * 2) + 1
    startList = [i for i in range(startFrame, endFrame+1, incr)]
    endList = [i-1 for i in range(startFrame, endFrame+1, incr)]
    endList.append(endFrame)
    endList.pop(0)
    frameList = zip(startList, endList)

    process = []
    q = multiprocessing.Queue()    # 創建列隊

    print '>%s -->' % timeInfo(), "Begin meshing process..."
    print '>>...'
    # create threads
    # 創建線程
    for i in range(threads):
        x = i + 1
        p = MeshProcess(processMesh, (q, sceneFile, x), 
                        "Thread %d" % x)
        process.append(p)

    # start threads
    # 線程開始
    for i in range(threads):
        process[i].start()

    # Fill the queue
    # 將幀列表放到列隊中排隊
    for f in frameList:
        q.put(f)

    # end threads
    # 線程任務完成，結束線程
    for i in range(threads):
        process[i].join()

    print '>>>...'
    print '>>%s -->' % timeInfo(), "End of meshing process"

    # exit
    # 退出
    sys.exit()

if __name__ == '__main__':
    main(sys.argv[1:])

使用視頻
[url]http://u.115.com/file/f455884023#[/url]
multiprocessingMesh.mp4

希望對你們有幫助