Re: [Visualpython-users] A legacy version of VPython?

[Stef M. <s.m...@ru...>]

hi Roberto,

sometime ago I wrote the message below,
works like a charm under windows.

cheers,
Stef

I played around, and found  the following work around:
- I installed Vpython version 5 on a different computer (afraid of  
harming my own work-PC  ;-) 
- called the visual directory "visual5"
- copied that visual5 directory to site-packages
- created the function below, which I place on a central place where all 
programs can reach it
- and add a line to all VPython programs  "Get_Visual ( ... )"  before 
importing visual, seems to work great.

cheers,
Stef


def Get_Visual ( Version = 3 ) :
  import os, sys
  print sys.path
  for path in sys.path :
    if path.endswith ( 'site-packages') :
      print path
      break
  vpath = os.path.join ( path, 'visual' )
  if ( Version == 3 ) and os.path.exists ( vpath + '3' ) :
    print 'Visual ==> V3', vpath
    os.rename ( vpath, vpath + '5' )
    os.rename ( vpath + '3', vpath )
  elif ( Version == 5 ) and os.path.exists ( vpath + '5' ) :
    print 'Visual ==> V5', vpath
    os.rename ( vpath, vpath + '3' )
    os.rename ( vpath + '5', vpath )

Get_Visual ( 3 )
from visual import *
...



Roberto Aguirre Maturana wrote:
> I have found some compatibility problems between vpython 3 and 5 (it seems  
> that pixel shading is not universal enugh). Therefore, I don't think I  
> will be able to make the transition to version 5 any time soon.
>
> Is there a way to have version 3 and version 5 co-existing on the same  
> computer, so I can call them independently?
>
> I guess, maybe a solution could be to create an independent visual library  
> based on vpython 3. The calling for the library could be something like  
> "from visual3 import ..." In that way it could be easy to have both  
> versions of visual installed, and if I require the older version I just  
> have to replace the string "visual" by "visual3" on my applications.
>
> I may even have a program that simultaneously open visual 3 and visual 5  
> scenes, for benchmarking purposes.
>
>
> Any thoughts?
>
>
> Best regards,
> Roberto Aguirre Maturana
> Santiago, Chile
>
>