[visionegg] Re: pseudorandom

Hi
My bad!
I found the problem.
I forgot that I had set a dynamic time limit of 100 seconds
i.e.  8501 frames.
All is well

Thanks
Dick



On Wed, 2005-03-09 at 15:34, richard srebro wrote:
> Hi,
> Well this is better
> 
> data = 0x00
> raw_lpt_module.out(LPT1,data)
> 
> def get_frame(f):
>               
>       if f < 511*50:
>               
>               tt=f%511
>               if tt == 0:#put out a pulse when m sequence starts
>                       data = 0xFF 
>                       raw_lpt_module.out(LPT1,data)
>               it tt == 1:
>                       data = 0x00
>                       raw_lpt_module.out(LPT1,data)
>                       
>               if ps[tt]== 0:
>                       dynamic_texture_object.put_sub_image( CC )
>                       
>               else:
>                       dynamic_texture_object.put_sub_image( CP )
>                       
>                       
>                                               
> test_controller=FunctionController(during_go_func=get_frame,temporal_variables=Controller.FRAMES_SINCE_GO)
>                     
> p.add_controller(None,None,test_controller)
>       
> p.go()
>       
> 
> but I can not get more that 8501 frames. For example with the above
> code which I expected to produce 511*50 = 25550 frames I got
> 
> 2005-03-09 15:20:01,285 (3440) 
> INFO: 8501 frames were drawn.
> Mean frame was 11.77 msec (85
> .00 fps), longest frame was 13.50 msec.
> 
> Thanks
> Dick
> 
> 
> 
> 
> On Tue, 2005-03-08 at 17:07, Andrew Straw wrote:
> > Hi Richard,
> > 
> > As far as your first issue, you can get the FlowControl code to give you 
> > a frame number instead of time.  Perhaps that helps?
> > 
> > def get_frame(f):
> >      print f
> > 
> > test_controller = 
> > FunctionController(during_go_func=get_frame,temporal_variables=Controller.FRAMES_SINCE_GO)
> > 
> > p.add_controller(None,None, test_controller )
> > 
> > As for problem 2, this is very strange, and I haven't seen it before and 
> > can't give any advice other than a couple of longshots: try different 
> > nVidia driver versions and doublecheck your screensaver settings.
> > 
> > Cheers!
> > Andrew
> > 
> > richard srebro wrote:
> > > I am trying to get a length 511 pseudorandom m sequence to control the
> > > phase of a checkerboard. The two checkerboards are preconstructed. CC is
> > > one checkerboard. CP is the counterphase checkerboard. I also want a
> > > signal that shows the checkerboard phase. Here is the control script
> > > that I am using
> > > 
> > > LPT1 = 0x378 
> > > 
> > > def control_dynamic(t):
> > >   
> > >   if t<= dynamic_time:
> > >           
> > >           tt=(int(t*100)%511)
> > >           
> > >           if ps[tt]== 0:
> > >                   dynamic_texture_object.put_sub_image( CC )
> > >                   data = 0x00
> > >                   raw_lpt_module.out(LPT1,data)
> > >           else:
> > >                   dynamic_texture_object.put_sub_image( CP )
> > >                   data = 0xFF 
> > >                   raw_lpt_module.out(LPT1,data)
> > >   
> > >           
> > > p.add_controller(None,None,FunctionController(during_go_func=control_dynamic))
> > >   
> > > p.go()
> > > 
> > > 
> > > There are two problems.
> > > 
> > > (1) tt=(int(t*100)%511) does not give an ordinal sequence. For example
> > > it gives 0,1,2,3,4,5,7,etc  skipping up every 6 to 7 positions.I
> > > understand why but I have not been able to find a way to get a counter
> > > going within the control loop. If I try a statement like cnt=cnt+1, it
> > > increments once and that is all.
> > > 
> > > (2) every once in a while the screen stops updating the display, usually
> > > with one or the other checkerboard displayed statically
> > > or on occasion with a blank screen. However, LPT1 goes on happily
> > > changing. I can get the screen to resume displaying the checkerboards
> > > if I move the mouse around in the "Konsole" window. If I keep the
> > > "Konsole" window visible and keep the cursor in it, the display does
> > > not stop updating.
> > > 
> > > 
> > > I am using an Nvidia board and the displays are free of any tears
> > > and refreshing at 85 Hz.
> > > 
> > > I am operating with Fedora Core 2.
> > > 
> > > Thanks for any help you can give me
> > > 
> > > Dick Srebro
> > > 
> > > ======================================
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> > > Archives: http://www.freelists.org/archives/visionegg
> > > Website: http://www.visionegg.org/mailinglist.html
> > > 
> > 
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