Thread: [Visualpython-users] new version crashed on Windows XP

This project is no longer active. See vpython.org.

Status: Abandoned

Brought to you by: bsherwood, dscherer

visualpython-users

[Visualpython-users] new version crashed on Windows XP

From: CL <clc...@gm...> - 2008-12-11 02:03:57

Hi,

I've installed the VPython-Win-Py2.5-5.0_candidate.exe on my PC. It
crashes immediately when I tried the sample programs and my old
programs.

I am able to run with 3.2.11 and 4.beta26 on my PC. (but I remember
there were some crashes on 4.beta26 with advance features).

I believe I have the latest video driver installed already. How can I
track down the probrem ?

CL

Re: [Visualpython-users] new version crashed on Windows XP

From: Bruce S. <Bru...@nc...> - 2008-12-11 02:37:23

This is unfamiliar behavior; I've seen few problems on Windows. And if 
you run an example program such as bounce2.py, or one of your own old 
programs, there should be no issues with graphics drivers, which one 
would expect would only affect the ability of your machine to display 
materials such as wood.

Here are some things to try. Please report what you observe.

Open a Python shell window and type "from visual import *".

If that works, verify that non-window aspects are working by typing "a = 
5*vector(1,2,3)" which should print out <5,10,15>.

Next try "box()" and see what happens.

To get a more detailed look, go to the "System" control panel and choose 
advanced settings, then environment variables, and create a user 
variable "VPYTHON_DEBUG" and give it the value 1.

Next, instead of using IDLE, run the Windows command prompt, found in 
Accessories in the program listings, and execute these statements:

cd c:\Python25\Lib\site-packages\visual\examples
\Python25\python.exe bounce2.py

You'll get a trace of activity in the Visual module which may give some 
indication of the problem.

Bruce Sherwood

CL wrote:
> Hi,
> 
> I've installed the VPython-Win-Py2.5-5.0_candidate.exe on my PC. It
> crashes immediately when I tried the sample programs and my old
> programs.
> 
> I am able to run with 3.2.11 and 4.beta26 on my PC. (but I remember
> there were some crashes on 4.beta26 with advance features).
> 
> I believe I have the latest video driver installed already. How can I
> track down the probrem ?
> 
> CL
> 
> ------------------------------------------------------------------------------
> SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada.
> The future of the web can't happen without you.  Join us at MIX09 to help
> pave the way to the Next Web now. Learn more and register at
> http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/
> _______________________________________________
> Visualpython-users mailing list
> Vis...@li...
> https://lists.sourceforge.net/lists/listinfo/visualpython-users

Re: [Visualpython-users] new version crashed on Windows XP

From: CL <clc...@gm...> - 2008-12-16 03:14:06

Hi Bruce

I have built vpython and found that the following code can fix the
problem on my PC:

The first crash is at ShowWindow in display::create() in windisplay.cpp

I've modifed it to:
	if (!wglMakeCurrent( dev_context, gl_context))
		WIN32_CRITICAL_ERROR( "wglMakeCurrent failed");
	ShowWindow( widget_handle, SW_SHOW);
	wglMakeCurrent( NULL, NULL );
Look like my video driver insist to have wglMakeCurrent called before ShowWindow

The second crash is at gl_extensions.cpp

template <class PFN>
void getPFN( PFN& func, display_kernel& d, const char* name ) {
	func = reinterpret_cast<PFN>( d.getProcAddress( name ) );
	if (!func)
		throw std::runtime_error(
			("Unable to get extension function: " +
			(std::string)name + " even though the extension is advertised.").c_str() );
}

When it is loading GL_ARB_multitexture
	if ( ARB_multitexture = d.hasExtension( "GL_ARB_multitexture" ) ) {
		F( glActiveTexture );
	}

The entry point glActiveTexture is not defined in my driver. I believe
it is also not defined in most old drivers. Since it is not defined,
an exception is flew. The exception is not handled.

I've changed it to:

	if ( ARB_multitexture = d.hasExtension( "GL_ARB_multitexture" ) ) {
		getPFN( glActiveTexture, d, "glActiveTextureARB" );
	}


After that, it is working fine. Textures are not supported, as vpython
seems requires shader extensions in order to support texture.

Re: [Visualpython-users] new version crashed on Windows XP

From: Bruce S. <Bru...@nc...> - 2008-12-16 22:50:59

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
  <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
David Scherer responds as follows:<br>
<div class="gmail_quote">
<blockquote class="gmail_quote"
 style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
  <div bgcolor="#ffffff" text="#000000">
  <pre>	if ( ARB_multitexture = d.hasExtension( "GL_ARB_multitexture" ) ) {
		getPFN( glActiveTexture, d, "glActiveTextureARB" );
	}

  </pre>
  </div>
</blockquote>
</div>
This fix can't be right.&nbsp; Either
glActiveTextureARB is part of that extension, in which case it MUST be
present if that name string is present, or it isn't, in which case the
wrong name string is being tested or the wrong function loaded.&nbsp; Or
there is a very serious bug in his drivers.<br>
<br>
Bruce Sherwood<br>
<br>
P.S. What exactly is your graphics hardware/software?<br>
<br>
CL wrote:
<blockquote
 cite="mid:d69...@ma..."
 type="cite">
  <pre wrap="">Hi Bruce

I have built vpython and found that the following code can fix the
problem on my PC:

The first crash is at ShowWindow in display::create() in windisplay.cpp

I've modifed it to:
	if (!wglMakeCurrent( dev_context, gl_context))
		WIN32_CRITICAL_ERROR( "wglMakeCurrent failed");
	ShowWindow( widget_handle, SW_SHOW);
	wglMakeCurrent( NULL, NULL );
Look like my video driver insist to have wglMakeCurrent called before ShowWindow

The second crash is at gl_extensions.cpp

template &lt;class PFN&gt;
void getPFN( PFN&amp; func, display_kernel&amp; d, const char* name ) {
	func = reinterpret_cast&lt;PFN&gt;( d.getProcAddress( name ) );
	if (!func)
		throw std::runtime_error(
			("Unable to get extension function: " +
			(std::string)name + " even though the extension is advertised.").c_str() );
}

When it is loading GL_ARB_multitexture
	if ( ARB_multitexture = d.hasExtension( "GL_ARB_multitexture" ) ) {
		F( glActiveTexture );
	}

The entry point glActiveTexture is not defined in my driver. I believe
it is also not defined in most old drivers. Since it is not defined,
an exception is flew. The exception is not handled.

I've changed it to:

	if ( ARB_multitexture = d.hasExtension( "GL_ARB_multitexture" ) ) {
		getPFN( glActiveTexture, d, "glActiveTextureARB" );
	}


After that, it is working fine. Textures are not supported, as vpython
seems requires shader extensions in order to support texture.

------------------------------------------------------------------------------
SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada.
The future of the web can't happen without you.  Join us at MIX09 to help
pave the way to the Next Web now. Learn more and register at
<a class="moz-txt-link-freetext" href="http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/">http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/</a>
_______________________________________________
Visualpython-users mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Vis...@li...">Vis...@li...</a>
<a class="moz-txt-link-freetext" href="https://lists.sourceforge.net/lists/listinfo/visualpython-users">https://lists.sourceforge.net/lists/listinfo/visualpython-users</a>
  </pre>
</blockquote>
</body>
</html>

Re: [Visualpython-users] new version crashed on Windows XP

From: CL <clc...@gm...> - 2008-12-17 02:26:37

Hi,

I have no knowledge in OpenGL implementation. I google it and someone said:

"glActiveTextureARB and glActiveTexture are the same function, except
that you have to explicitly obtain a pointer for glActiveTextureARB,
and glActiveTexture is supposed to be exposed by the GL implementation
if the implementation exposes OpenGL 1.2 (I believe).  So, on
Microsoft's impl, you probably want to use LoadExtension() and
glActiveTextureARB. "

I am using VIA/S3G UniChrome Pro IGP/MMX/SSE.

I believe most new hardware shall have botth glActiveTexture and
glActiveTextureARB implemented ?

Anyway, if getPFN log an error instead of flow an exception, it can
let vpython to run on more old PCs.


On 12/17/08, Bruce Sherwood <Bru...@nc...> wrote:
> David Scherer responds as follows:
>
> >
> > if ( ARB_multitexture = d.hasExtension( "GL_ARB_multitexture" ) ) {
> getPFN( glActiveTexture, d, "glActiveTextureARB" );
 }


> >
> This fix can't be right.  Either glActiveTextureARB is part of that
> extension, in which case it MUST be present if that name string is present,
> or it isn't, in which case the wrong name string is being tested or the
> wrong function loaded.  Or there is a very serious bug in his drivers.
>
> Bruce Sherwood
>
> P.S. What exactly is your graphics hardware/software?
>
> CL wrote:
> Hi Bruce

I have built vpython and found that the following code can fix
> the
problem on my PC:

The first crash is at ShowWindow in display::create()
> in windisplay.cpp

I've modifed it to:
 if (!wglMakeCurrent( dev_context,
> gl_context))
 WIN32_CRITICAL_ERROR( "wglMakeCurrent failed");
 ShowWindow(
> widget_handle, SW_SHOW);
 wglMakeCurrent( NULL, NULL );
Look like my video
> driver insist to have wglMakeCurrent called before ShowWindow

The second
> crash is at gl_extensions.cpp

template <class PFN>
void getPFN( PFN& func,
> display_kernel& d, const char* name ) {
 func = reinterpret_cast<PFN>(
> d.getProcAddress( name ) );
 if (!func)
 throw std::runtime_error(
 ("Unable
> to get extension function: " +
 (std::string)name + " even though the
> extension is advertised.").c_str() );
}

When it is loading
> GL_ARB_multitexture
 if ( ARB_multitexture = d.hasExtension(
> "GL_ARB_multitexture" ) ) {
 F( glActiveTexture );
 }

The entry point
> glActiveTexture is not defined in my driver. I believe
it is also not
> defined in most old drivers. Since it is not defined,
an exception is flew.
> The exception is not handled.

I've changed it to:

 if ( ARB_multitexture =
> d.hasExtension( "GL_ARB_multitexture" ) ) {
 getPFN( glActiveTexture, d,
> "glActiveTextureARB" );
 }


After that, it is working fine. Textures are
> not supported, as vpython
seems requires shader extensions in order to
> support
> texture.

------------------------------------------------------------------------------
SF.Net
> email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada.
The
> future of the web can't happen without you. Join us at MIX09 to help
pave
> the way to the Next Web now. Learn more and register
> at
http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/
_______________________________________________
Visualpython-users
> mailing
> list
Vis...@li...
https://lists.sourceforge.net/lists/listinfo/visualpython-users
>