threading-model Cull/Draw

Scripting Issues
1

Just loaded 1.8 and tried this option in my config.prc:

threading-model Cull/Draw

When I try to launch my app, nothing happens. No Panda window at all.

I comment it out and everything works again.

2

Does it work if you try it in, say, one of the sample programs?

If it does, can you determine what’s different about your application?

David

3

Tried it on samples and sure enough, it worked.

So I started looking at my code.
Strangely enough, it seems to happen because of this line:

loadPrcFileData("", "icon-filename _start.ico")

Here’s a whole quick program that shows the problem. If you comment out the line above, everything is fine.

# Python imports
import csv, random, sys, os, datetime						# various std Python modules

# Panda3D imports
from panda3d.core import *									# use PRC settings, Vec3, Filename, etc.
from direct.showbase.ShowBase import ShowBase				# main app object
from direct.gui.DirectGui import *							# use DirectGUI
from direct.actor import Actor								# use Actors
from direct.interval.IntervalGlobal import *				# use Intervals
from direct.task import Task								# use Tasks
from direct.filter.CommonFilters import CommonFilters		# use Filters for graphic fx
from direct.stdpy.file import *								# use Panda file handling (replaces python version)

loadPrcFileData("", "icon-filename _start.ico") 			# Set window icon
loadPrcFileData("", "threading-model Cull/Draw")			# Enable auto multi-threading (Panda 1.8)

class myGame(ShowBase):
	def __init__(self):
		# Start this puppy up!

		ShowBase.__init__(self)											# init main Panda object code
		print "OK"

g = myGame()
g.run()

the file _start.ico does exist and this code worked fine in 1.72

4

Ah, this is the sort of thing that happens with new, experimental features. :slight_smile:

There must be some internal deadlock in the Panda code that loads the icon file when it happens in a sub-thread. Please submit a bug report via launchpad, so this gets on the record.

In the meantime, you can decide whether you’d rather run with pipelined mode, or with a custom icon. :slight_smile:

David

5

Bug report submitted.

I have gotten it to work by commenting out the icon line, but it now hangs at a later point in my app. Will try to find out where this is happening. Seems to be in my “cleanup” code when I try to go back to a title screen.