On 12/05/2014 at 12:03, xxxxxxxx wrote:
With a python tag plugin, I'm calculating voxels, so a lot of polygon handing.
Now I see that cinema is not using all processors (only 1 out of 4) on my Windows 7 machine.
When rendering it uses all processors, but not with my python tag plugin.
What to do, so that cinema will use all processors?
On 12/05/2014 at 12:58, xxxxxxxx wrote:
It's a CPython Limitation, read up on the GIL and Multiprocessing in Python.
-Niklas
On 13/05/2014 at 01:36, xxxxxxxx wrote:
Hi pgrooff
I guess that´s why e.g. supervoxels was written in c++.
http://www.remotion4d.net/redokuwiki/doku.php?id=supervoxels2013
Funny, I also created a voxelizer in the past few days.
cheers
Martin
On 13/05/2014 at 06:07, xxxxxxxx wrote:
Originally posted by xxxxxxxx
Funny, I also created a voxelizer in the past few days.
Yes, it is quite a challenge, but fun.
The main challenge is to optimize, improve the algorithm step by step.
I am doing a prototype in python and then port it to C++.
One of the things I like to do with the voxels, is to explode volumetric objects.
Also with "supervoxels" you have threading option / nr of cores options.
Very advanced and interesting. But I guess you can divide the processing in parts and assign that to different threads (processors?).
I saw your new post sharing your voxelizer. Great thanks.
I do not use particle, but straight forward cubes.
-Pim
On 14/05/2014 at 01:39, xxxxxxxx wrote:
I´ve never used threads before and I´m not sure if I understand this right.
If I open a new thread in c4d, is it only a user thread and not a Kernel thread?
Does that mean that I'm only working on one Kernel and I just delegate tasks to several User threads?
And is this the right usage, cause within the function it says that I´m still using the Main thread?
import c4d
from c4d.threading import C4DThread
class firstThread(c4d.threading.C4DThread) :
k=0
def func1(self,k) :
print c4d.threading.GeIsMainThread(),"main"
for i in xrange(1,8000) :
x=1000000/i
for j in xrange(1,1000) :
y=1000000/j
k=x*y
print c.IsRunning(),"first inside"
return k
class secondThread(c4d.threading.C4DThread) :
o=0
def func2(self,o) :
print c4d.threading.GeIsMainThread(),"main"
for i in xrange(1,8000) :
x=1000000/i
for j in xrange(1,1000) :
y=1000000/j
o=x*y
return o
c= firstThread()
d= secondThread()
#Start Threads
c.Start()
k= 0
print c.IsRunning(),"first"
k= c.func1(op)
d.Start()
o= 0
print d.IsRunning(),"second"
o= d.func2(op)
c.End()
d.End()
print o+k
Martin