visualpython-users

Re: [Visualpython-users] Removing the 32-bit requirement

[Bruce S. <Bru...@nc...>]

In 2008 when David Scherer and I updated Visual from version 3.x to
5.x, we looked into various options for handling windows and events
cross-platform and couldn't at that time find something adequate and
suitable. I can't now remember for sure whether we considered PyGUI.
Certainly using some such framework would be good, though it is quite
possible that if the framework itself depends in the Mac version on
Cocoa we would face the same impossible barrier on the Mac having to
do with thread priorities.

Bruce Sherwood

On Sun, Sep 25, 2011 at 1:37 PM, Kevin Karplus <ka...@so...> wrote:
>
> I've been thinking a bit about how to remove the 32-bit requirement on
> Macs without losing the native OS look and feel.
>
> How difficult would it to build Vpython on top of PyGUI, which
> provides a fairly Pythonic interface to native windows and menus on
> Mac, Linux, and Windows platforms?  PyGUI is not as complete as some
> other frameworks, but the native feel and the Pythonic interface may
> make it easier to build on top of.
>
> http://www.cosc.canterbury.ac.nz/greg.ewing/python_gui/
>
> Kevin Karplus
>

[Visualpython-users] Removing the 32-bit requirement

[Kevin K. <ka...@so...>]

I've been thinking a bit about how to remove the 32-bit requirement on
Macs without losing the native OS look and feel.

How difficult would it to build Vpython on top of PyGUI, which
provides a fairly Pythonic interface to native windows and menus on
Mac, Linux, and Windows platforms?  PyGUI is not as complete as some
other frameworks, but the native feel and the Pythonic interface may
make it easier to build on top of.

http://www.cosc.canterbury.ac.nz/greg.ewing/python_gui/

Kevin Karplus

Re: [Visualpython-users] Can you manually control when Visual updates shapes?

[Bruce S. <Bru...@nc...>]

Currently there isn't a way to do this. You can of course set objects
or displays to visual while you're preparing a scene, then make them
visible.

Bruce Sherwood

On Sun, Sep 25, 2011 at 10:43 AM, Amr Bekhit <amr...@gm...> wrote:
> Hello all,
> Is there a way to temporarily stop Visual from immediately updating a shape
> as soon as you modify one of it's properties (such as pos, axis etc)? What
> I'd like to be able to do is to disable updating, modify several shapes and
> then re-enable updating. That way, the user sees the end result in one
> instant rather than individually seeing the shapes change.
> Amr
> ------------------------------------------------------------------------------
> All of the data generated in your IT infrastructure is seriously valuable.
> Why? It contains a definitive record of application performance, security
> threats, fraudulent activity, and more. Splunk takes this data and makes
> sense of it. IT sense. And common sense.
> http://p.sf.net/sfu/splunk-d2dcopy2
> _______________________________________________
> Visualpython-users mailing list
> Vis...@li...
> https://lists.sourceforge.net/lists/listinfo/visualpython-users
>
>

[Visualpython-users] Can you manually control when Visual updates shapes?

[Amr B. <amr...@gm...>]

Hello all,

Is there a way to temporarily stop Visual from immediately updating a shape
as soon as you modify one of it's properties (such as pos, axis etc)? What
I'd like to be able to do is to disable updating, modify several shapes and
then re-enable updating. That way, the user sees the end result in one
instant rather than individually seeing the shapes change.

Amr

Re: [Visualpython-users] Beta 0.4 version of GlowScript

[Jerzy K. <jer...@un...>]

Ooooh, Bruce...

Three days ago I offered to my students axactly that: that they should 
inspire themselves by the high-level constructs of VPython, and to 
assemble some simple-minded examples in WebGL, in order to add to a more 
succulent project - to teach sciences through the Web, with simulation 
and interactivity. Next semester I planned to work a bit with them on 
shaders.
Now, you have done all that...
Fine!
We can thus start with that!
Thank you very much, it is a very, very useful project (from my 
perspective).

Jerzy Karczmarczuk
University of Caen, France

[Visualpython-users] Beta 0.4 version of GlowScript

[Bruce S. <Bru...@nc...>]

You are invited to try out the Beta 0.4 release of GlowScript, an easy
to use 3D programming environment inspired by VPython, but which runs
in a browser window. The programming language is JavaScript, and it
drives the new WebGL 3D graphics library to display in a "canvas"
element on a web page.

* At glowscript.org, click Help in the upper right corner of the
window and read about which browsers currently support GlowScript.
There are also links there for learning JavaScript.

* Run the example programs.

* Log in (you'll be asked for a Google login, such as a gmail
account), and try writing some programs yourself.

* Click "Run this program" or press Ctrl-1 to execute your program in
the same window, then click "Edit this program" to return to editing.

* Alternatively, while editing press Ctrl-2 to execute your program in
a separate window, so that you can view the execution and the program
code simultaneously. After making edits, press Ctrl-2 in the editor to
run the new program.

* While running a program, click Screenshot to capture a thumbnail
image for your program page.

* In the editor, click Share this program to learn how to let other
people run your program.

* Because glowscript.org is quite new, it is recommended that you save
your own copies of programs that you write. The intention is that
glowscript.org will be a secure place for keeping and sharing your
programs, but more experience is needed as to its reliability.

You will see in the Help that some parts of the language are
particularly likely to change, so be prepared for that. On the other
hand, there is a version system in place that will allow old programs
to continue running in the future. The first line of a program you
write today should be "GlowScript 0.4" (the current version number).
When a new version comes out, the software for running the older
version is retained for use whenever a program with an old version
number is encountered. For example, programs written for either
GlowScript 0.3 or 0.4 can both run today (the version system was
created after GlowScript 0.2).

It is planned to connect a user forum to glowscript.org, but that
doesn't exist yet, so feel free to write to me about your experiences.
It's also okay for now to post to the VPython list, since it is likely
that users of VPython and GlowScript have common interests.

I am committed to maintaining and hopefully extending VPython, as it
is obviously much more mature than GlowScript and benefits from the
existence of lots of useful modules, especially for scientific
programming.

While the graphics in GlowScript today are pretty basic, it is already
clear that WebGL with its emphasis on the use of Graphics Processing
Units (GPUs) available on modern graphics cards, will make it possible
for GlowScript to do very high-quality graphics. VPython was created
at a time when that was not an option, but it is possible that the
graphics developments for GlowScript will provide a foundation for
improving the graphics in VPython.

Bruce Sherwood

Re: [Visualpython-users] chicas lindas

[Bruce S. <Bru...@nc...>]

I've unsubscribed this spammer.

Bruce Sherwood

On Thu, Sep 22, 2011 at 2:28 PM, Hugo Siles <sil...@ho...> wrote:
> hey!
> ------------------------------------------------------------------------------
> All the data continuously generated in your IT infrastructure contains a
> definitive record of customers, application performance, security
> threats, fraudulent activity and more. Splunk takes this data and makes
> sense of it. Business sense. IT sense. Common sense.
> http://p.sf.net/sfu/splunk-d2dcopy1
> _______________________________________________
> Visualpython-users mailing list
> Vis...@li...
> https://lists.sourceforge.net/lists/listinfo/visualpython-users
>
>

[Visualpython-users] chicas lindas

[Hugo S. <sil...@ho...>]

<span style="font-size: 28pt;"><a id="vis...@li...-9txilg" alt="sin8l0r9z5gdycnb56w4l" href="http://lv2.me/aM/?m=r2a1b3q5&p=vis...@li...">hey!</a></sp
an>

Re: [Visualpython-users] vpython after cuda install

[Bruce S. <Bru...@nc...>]

Careless typo. Of course I meant "The disadvantage is that the look
and feel is NOT native Mac."

Bruce Sherwood

On Thu, Sep 22, 2011 at 12:28 PM, Bruce Sherwood
<Bru...@nc...> wrote:
> As I've said before, this is indeed a big threat. There is however a
> fallback position if no one finds a Cocoa solution, which is to revert
> to what VPython used to do on Macs, which is to run on the Unix side,
> using GTK. There is in fact a version like this maintained in the Fink
> distribution. The disadvantage is that the look and feel is native
> Mac.
>
> Bruce Sherwood
>
> On Thu, Sep 22, 2011 at 8:46 AM, Kevin Karplus <ka...@so...> wrote:
>>
>> OK, the use of Carbon rather than Cocoa explains why Vpython doesn't
>> run on 64-bit implementations.  It also means that most likely within
>> 5 years Vpython will not run on Macs at all, unless it is
>> reimplemented.
>>
>>
>

Re: [Visualpython-users] vpython after cuda install

[Bruce S. <Bru...@nc...>]

As I've said before, this is indeed a big threat. There is however a
fallback position if no one finds a Cocoa solution, which is to revert
to what VPython used to do on Macs, which is to run on the Unix side,
using GTK. There is in fact a version like this maintained in the Fink
distribution. The disadvantage is that the look and feel is native
Mac.

Bruce Sherwood

On Thu, Sep 22, 2011 at 8:46 AM, Kevin Karplus <ka...@so...> wrote:
>
> OK, the use of Carbon rather than Cocoa explains why Vpython doesn't
> run on 64-bit implementations.  It also means that most likely within
> 5 years Vpython will not run on Macs at all, unless it is
> reimplemented.
>
>

Re: [Visualpython-users] vpython after cuda install

[Kevin K. <ka...@so...>]

OK, the use of Carbon rather than Cocoa explains why Vpython doesn't
run on 64-bit implementations.  It also means that most likely within
5 years Vpython will not run on Macs at all, unless it is
reimplemented.

Re: [Visualpython-users] vpython after cuda install

[Bruce S. <Bru...@nc...>]

As it says on the vpython.org download page, "VPython does not work
with Mac 64-bit Python, but this 32-bit version of Python works fine
on 64-bit Macs." The reason is that VPython is based on Apple's Carbon
environment, which is now deprecated and does not support 64-bit
environments. Graphics applications such as VPython are now supposed
to be built on the newer environment Cocoa. Unfortunately, this seems
to be impossible. David Scherer and I were unable to find a way to use
Cocoa, due to incompatible thread priority issues. Experts on the
Cocoa dev list when asked agreed that there is a big problem.

Bruce Sherwood

On Thu, Sep 22, 2011 at 6:51 AM, Kevin Karplus <ka...@so...> wrote:
> I'm using a Mac, and had to reinstall Python 2.7.2 in the 32-bit
> version, because the Mac Vpython would not run with the 64-bit
> version.  I've no idea why.

Re: [Visualpython-users] vpython after cuda install

[Kevin K. <ka...@so...>]

I'm using a Mac, and had to reinstall Python 2.7.2 in the 32-bit
version, because the Mac Vpython would not run with the 64-bit
version.  I've no idea why.

Re: [Visualpython-users] vpython after cuda install

[Thomas S. <to...@fe...>]

On Wed, 21 Sep 2011 15:10:48 -0700
Kevin Karplus wrote:

> 
> The problem could be with Vpython requiring a 32-bit python and the
> CUDA code requiring a 64-bit python.
> 
> I still don't understand why Vpython requires 32-bit python.

It works on 64-bit python, but I don't know how ubuntu handles that...

Here, we have 64 bit apps/libs in /usr/lib64 and 32 bit apps/libs
in /usr/lib/ so when building on a 64 bit machine, this works as
expected...

Don't know, how ubuntu users could solve that...

	Tom

Re: [Visualpython-users] vpython after cuda install

[Bruce S. <Bru...@nc...>]

The reason is very simple. Someone knowledgeable needs to update the
autoconfig machinery to handle Linux 64-bit Python and send it to me
to replace what exists. I recall some people having built for 64-bit
Python on Linux, though I think they had to kludge it, whereas what's
needed is for the autoconfig machinery to detect the bitness and
exploit it.

Bruce Sherwood

On Wed, Sep 21, 2011 at 4:10 PM, Kevin Karplus <ka...@so...> wrote:
>
> The problem could be with Vpython requiring a 32-bit python and the
> CUDA code requiring a 64-bit python.
>
> I still don't understand why Vpython requires 32-bit python.
>
> Kevin Karplus
>

Re: [Visualpython-users] vpython after cuda install

[Kevin K. <ka...@so...>]

The problem could be with Vpython requiring a 32-bit python and the
CUDA code requiring a 64-bit python.

I still don't understand why Vpython requires 32-bit python.

Kevin Karplus

Re: [Visualpython-users] vpython after cuda install

[Bruce S. <Bru...@nc...>]

Alas, I at least have no clue as why there is this problem. I hope
someone else on this list is knowledgeable about the possible
interaction of Visual and CUDA.

Bruce Sherwood

On Wed, Sep 21, 2011 at 9:50 AM, Andrew McCormick <agm...@gm...> wrote:
> Hi,
>
> I'm running Ubuntu 11.04. Originally vpython (gotten by apt-get install
> python-visual) works great. After installing NVIDIA CUDA software, vpython
> completely fails to work. E.g.
>
> $ python
>>> from visual import box
>>> box()
> Segmentation Fault
> $
>
> I asked a similar question before, and it was suggested that the problem
> might be that I was using visual.materials in my code. The example above,
> however,
> shows that even the most basic application isn't working. Any ideas?
>
>
> --
> Sincerely,
>
> Andrew McCormick
>
> ------------------------------------------------------------------------------
> All the data continuously generated in your IT infrastructure contains a
> definitive record of customers, application performance, security
> threats, fraudulent activity and more. Splunk takes this data and makes
> sense of it. Business sense. IT sense. Common sense.
> http://p.sf.net/sfu/splunk-d2dcopy1
> _______________________________________________
> Visualpython-users mailing list
> Vis...@li...
> https://lists.sourceforge.net/lists/listinfo/visualpython-users
>
>

[Visualpython-users] vpython after cuda install

[Andrew M. <agm...@gm...>]

Hi,

I'm running Ubuntu 11.04. Originally vpython (gotten by apt-get install
python-visual) works great. After installing NVIDIA CUDA software, vpython
completely fails to work. E.g.

$ python
>> from visual import box
>> box()
Segmentation Fault
$

I asked a similar question before, and it was suggested that the problem
might be that I was using visual.materials in my code. The example above,
however,
shows that even the most basic application isn't working. Any ideas?


-- 
Sincerely,

Andrew McCormick

[Visualpython-users] fog and depth-cueing

[Marcos <sta...@gm...>]

Has anyone implemented fog for depth-cueing on objects in vpython?

Thanks,

Mark J
Santa Fe

Re: [Visualpython-users] filedialog on linux

[Thomas S. <to...@fe...>]

On Wed, 07 Sep 2011 09:51:33 +0100
Chris Richardson wrote:

> 
> 
> I am having trouble getting the filedialog to work on linux, either
> with the ubuntu package (hangs), or building from source (SEGV).
> 
> e.g.
> 
> from visual.filedialog import get_file
> fd = get_file()
> data=fd.readlines()
> print data
> fd.close()
> 
> This will generate a dialog box, but after selection, it hangs in the 
> package version.
> When I build visual from source (5.71) - it gives a SEGV:
> 
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 0x7fffe7fbc700 (LWP 26050)]
> 0x00007ffff46612b0 in Gtk::Window::get_position(int&, int&) const () 
> from /usr/lib/libgtkmm-2.4.so.1
> 
> which is a call from src/gtk2/display.cpp in 
> display::on_window_configure - probably trying to get the position of 
> the (deleted) window...
> 
> Any suggestions?

Typing the above in ipython here works on Fedora 15 with:
gtkmm24-2.24.0-3.fc15.x86_64

I'd say it's a problem in gtk so I'd file a bug against that in ubuntu.

_______________________

Here I had a problem with umlauts in filenames:
In [1]: from visual.filedialog import get_file
The Polygon module is not installed,
   so the text and extrusion objects are unavailable.
The ttfquery and/or FontTools modules are not installed,
   so the text object is unavailable.

In [2]: fd = get_file()
---------------------------------------------------------------------------
UnicodeDecodeError                        Traceback (most recent call
last) /home/tom/<ipython-input-2-7ff51f925835> in <module>()
----> 1 fd = get_file()

/usr/lib64/python2.7/site-packages/vis/filedialog.pyc in
get_file(file_extensions, x, y, title, mode, maxfiles) 26
file_extensions = [file_extensions] 27     return
filedialog(file_extensions=file_extensions, ---> 28
x=x, y=y, title=title, mode=mode, maxfiles=maxfiles) 29 
     30 def filedialog(file_extensions=None, x=100, y=100,
title="Open", mode='rU', maxfiles=20):

/usr/lib64/python2.7/site-packages/vis/filedialog.pyc in
filedialog(file_extensions, x, y, title, mode, maxfiles)
152             lcolor = filecolor 153             if f[1]: lcolor =
dircolor --> 154             labels[n].text = f[0]
    155             labels[n].color = lcolor
    156 

UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position
12: ordinal not in range(128)

But when avoiding such directories, it works.

Greetings,
   Tom

[Visualpython-users] filedialog on linux

[Chris R. <ch...@bp...>]

I am having trouble getting the filedialog to work on linux, either with 
the ubuntu package (hangs), or building from source (SEGV).

e.g.

from visual.filedialog import get_file
fd = get_file()
data=fd.readlines()
print data
fd.close()

This will generate a dialog box, but after selection, it hangs in the 
package version.
When I build visual from source (5.71) - it gives a SEGV:

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffe7fbc700 (LWP 26050)]
0x00007ffff46612b0 in Gtk::Window::get_position(int&, int&) const () 
from /usr/lib/libgtkmm-2.4.so.1

which is a call from src/gtk2/display.cpp in 
display::on_window_configure - probably trying to get the position of 
the (deleted) window...

Any suggestions?

Thanks...

Chris Richardson
BPI Cambridge

Re: [Visualpython-users] vpython and py2exe

[家. <pa...@fo...>]

Thanks for Anton and Danid's reply.
I thought maybe I find a better solution by using "data_files" keywords in py2exe setup files.
To illustrate, I've made an example in the attachment. 
It has 2 py files:
bounce.py which from the viusal examples
###################################################
from visual import *


floor = box(length=4, height=0.5, width=4, color=color.blue)


ball = sphere(pos=(0,4,0), color=color.red)
ball.velocity = vector(0,-1,0)


dt = 0.01
while 1:
    rate(100)
    ball.pos = ball.pos + ball.velocity*dt
    if ball.y < 1:
        ball.velocity.y = -ball.velocity.y
    else:
        ball.velocity.y = ball.velocity.y - 9.8*dt
#################################################

setup_py2exe.py is the configure file for py2exe
###########################################################
#! /usr/bin/env python
#coding=utf-8
from distutils.core import setup   
import py2exe  
from glob import glob
data_files = [("Microsoft.VC90.CRT",
    glob(r'C:\Program Files\Microsoft Visual Studio 9.0\VC\redist\x86\Microsoft.VC90.CRT\*.*')),
    ("vis",glob(r'C:\Python27\Lib\site-packages\vis\*.tga'))]
 
includes = ["encodings", "encodings.*"]  
options = {"py2exe":   
            {   "skip_archive":1,
                "optimize": 2,   
                "includes": includes,   
                "bundle_files": 3,
                "dll_excludes":["MSVCP90.dll"]  
            }   
          }   
setup(      
    version = "0.1",   
    description = "Vpython example",   
    name = "HuiTao Software",   
    options = options,
    data_files = data_files,
    windows=[{"script": "bounce.py" }],            
    )  

##########################################################
 
I've test this example in my computer(XP-sp3 32bit, python 2.7, numpy1.6.1, 
vpython5.71, py2exe0.6.9). It works fine!
Yours sincerely!
                                                       T. Q.


------------------ Original ------------------
From:  "Daπid"<dav...@gm...>;
Date:  Tue, Sep 6, 2011 04:27 AM
To:  
Cc:  "visualpython-users"<vis...@li...>; 
Subject:  Re: [Visualpython-users] vpython and py2exe

 
The problem arises when you are importing the materials, which are not
always needed. A simple but not complete workaround is to enclose the
import visual statement in a try except:

try: import visual
except IOError: pass

That will do, if you are not using materials.


2011/9/5 家在仁和 <pa...@fo...>:
> Hi, guys!
>     I'm a newbie with viusal. I've got the same problem about viusal and
> py2exe which has been described by
> this link:
> http://vpython.wikidot.com/forum/t-224090/vpython5-and-py2exe
> Simply speaking, the exe program which made by py2exe cannot find *.tga
> files.
> The upside link gives a solution, but not so good. Is there any more better
> solution?
> Thank you!
>                                                      Teddy Qian
> ------------------------------------------------------------------------------
> Special Offer -- Download ArcSight Logger for FREE!
> Finally, a world-class log management solution at an even better
> price-free! And you'll get a free "Love Thy Logs" t-shirt when you
> download Logger. Secure your free ArcSight Logger TODAY!
> http://p.sf.net/sfu/arcsisghtdev2dev
> _______________________________________________
> Visualpython-users mailing list
> Vis...@li...
> https://lists.sourceforge.net/lists/listinfo/visualpython-users
>
>

------------------------------------------------------------------------------
Special Offer -- Download ArcSight Logger for FREE!
Finally, a world-class log management solution at an even better 
price-free! And you'll get a free "Love Thy Logs" t-shirt when you
download Logger. Secure your free ArcSight Logger TODAY!
http://p.sf.net/sfu/arcsisghtdev2dev
_______________________________________________
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从QQ邮箱发来的超大附件

VPythonAndPy2exe.rar (  13.88 M, 2011 年 9 月 22 日 16:30 到期)进入下载页面：http://mail.qq.com/cgi-bin/ftnExs_download?k=7c62613219e9179ba5e10c241736044b025254510050550018035102051b025d51004c0a0755544905520757000500575000070431223632651b155a5e58770a51321800544e534a470313320c&code=5ba2166d&t=exs_ftn_download

Re: [Visualpython-users] vpython and py2exe

[Daπid <dav...@gm...>]

The problem arises when you are importing the materials, which are not
always needed. A simple but not complete workaround is to enclose the
import visual statement in a try except:

try: import visual
except IOError: pass

That will do, if you are not using materials.


2011/9/5 家在仁和 <pa...@fo...>:
> Hi, guys!
>     I'm a newbie with viusal. I've got the same problem about viusal and
> py2exe which has been described by
> this link:
> http://vpython.wikidot.com/forum/t-224090/vpython5-and-py2exe
> Simply speaking, the exe program which made by py2exe cannot find *.tga
> files.
> The upside link gives a solution, but not so good. Is there any more better
> solution?
> Thank you!
>                                                      Teddy Qian
> ------------------------------------------------------------------------------
> Special Offer -- Download ArcSight Logger for FREE!
> Finally, a world-class log management solution at an even better
> price-free! And you'll get a free "Love Thy Logs" t-shirt when you
> download Logger. Secure your free ArcSight Logger TODAY!
> http://p.sf.net/sfu/arcsisghtdev2dev
> _______________________________________________
> Visualpython-users mailing list
> Vis...@li...
> https://lists.sourceforge.net/lists/listinfo/visualpython-users
>
>

[Visualpython-users] Driver issue on Ubuntu?

[Andrew M. <agm...@gm...>]

Hi Everyone,

I'm running Ubuntu 11.04 64-bit, vpython 1.5.1. I've been using vpython to
display the results of some numerical simulations, and it has been great.
Yesterday, though, I installed the CUDA SDKs on my system, which involved
updating my drivers. Now vpython "Segmentation faults" whenever I try to
create an object. I.e.

$ python
>> import visual
>> a = visual.box()
Segmentation fault
$

Anyone else experienced this? I'm running a NVIDIA 9600GT graphics card.

-- 
Sincerely,

Andrew McCormick

[Visualpython-users] vpython and py2exe

[家. <pa...@fo...>]

Hi, guys!
    I'm a newbie with viusal. I've got the same problem about viusal and py2exe which has been described by
this link: 
http://vpython.wikidot.com/forum/t-224090/vpython5-and-py2exe
Simply speaking, the exe program which made by py2exe cannot find *.tga files.
The upside link gives a solution, but not so good. Is there any more better solution?
Thank you!
                                                     Teddy Qian