Multithreading in Vizard 3.0

[farshizzo]

What is the problem with your "while True:" loop? Are you yielding to other threads in the loop by issuing a time.sleep(...) call?

Are you talking about a custom threading event or a Vizard event?

[RedSpikeyThing]

Originally Posted by farshizzo

What is the problem with your "while True:" loop? Are you yielding to other threads in the loop by issuing a time.sleep(...) call?

Are you talking about a custom threading event or a Vizard event?

The code I am using is supposed to spew out number until the program stops:

import viz
import threading

class ThreadedClass (threading.Thread):
	def run(self):
		i = 0
		while True:
			i = i + 1
			print i

t = ThreadedClass()
t.setDaemon(True)
t.start()

viz.go()

This code should just print successive numbers until the program is terminated. The output I get, however, is as follows:

1
2
<you get the idea>
1051
** Load Time: 0.12 seconds
1052
1053
<you get the idea>
1066

No matter how long the program is run for, it terminates at 1066. Also, the numbers 1052 to 1056 do not appear in the output window until the main program is stopped. It appears as if the thread is not running past a certain number of iterations.

I've been looking around for resources on how to do this, but I am having difficulty finding any. Do you have any references so that I don't have to post for every problem I encounter?

As always, thanks I appreciate the help.

[farshizzo]

Try adding the following line to your script:

viz.directormode(viz.DIRECTOR_FAST)

This tells Vizard to allow Python threads to run while Vizard is drawing. Technically speaking, this will instruct Vizard to relase the GIL while rendering. For more information about the GIL and how Python threads behave, have a look at this page, http://docs.python.org/api/threads.html