OpenEuphoria

Re: OpenGl again.

• Posted by Paul Martin <twilight at WCC.NET> Apr 13, 1999
• 458 views

Hello again,

Well I hate replying to my own E-mails, but I've only got one other reply.
I was wondering if I stumped everyone or does nobody care? I hoping it more
that I stumped everone, but if it is because nobody cares then I need to
know that I'm wasting my time.

Thanks
Paul Martin


At 11:53 AM 4/8/99 -0500, you wrote:
>Hello everyone.
>
>If any of you have read my previous postings you'll know that I'm working
>on wrappers for OpenGL/GLUT. OpenGL is a 3D graphics API and GLUT is
>similar to Win32lib, except designed for OpenGL. You can find out more from
><www.opengl.org>. I have for the last four weeks been pulling my hair out
>trying to get it to work. I've been plagued by one problem that I
>absolutely can not track down, because windows returns an encryptic error
>message that does not point to any place in my program. I believe the
>problem may lie in GLUT and the callbacks, but I cannot be sure.
>
>I was hoping a few of you would mind downloading what I have, taking a look
>at it, and see what you can come up with. I really  wanted to get this to
>work on my own, but I'm missing some critical piece of the puzzle.
>
>So far GLUT opens a window, clears it and then bombs with the error message:
>
>>EXW caused an invalid page fault in
>>module EXW.EXE at 023f:00405053.
>>Registers:
>>EAX=00000000 CS=023f EIP=00405053 EFLGS=00210216
>>EBX=0000000f SS=0247 ESP=0056fb88 EBP=00000654
>>ECX=00000000 DS=0247 ESI=005806fc FS=420f
>>EDX=00000000 ES=0247 EDI=0056fba2 GS=0000
>>Bytes at CS:EIP:
>>8b 55 76 81 e2 ff 00 00 00 89 45 72 83 fa 04 75
>>Stack dump:
>>000001f6 0058040c 00000000 00000001 00000200 000001f6 00000201 00f30247
>00000200 000001f6 0058040c 00000002 00000202 00f30247 00ec0000 00000040
>
> and then
>
>>EXW caused an invalid page fault in
>>module <unknown> at 0000:0b75fc5d.
>>Registers:
>>EAX=bff87fc0 CS=023f EIP=0b75fc5d EFLGS=00210246
>>EBX=bff87fc0 SS=0247 ESP=005600f8 EBP=00560118
>>ECX=0056019c DS=0247 ESI=81760af0 FS=420f
>>EDX=bff76859 ES=0247 EDI=00560290 GS=0000
>>Bytes at CS:EIP:
>>
>>Stack dump:
>>bff7684d 00560290 bff87fc0 005601c4 0056019c 0056057c bff76859 bff87fc0
>005601ac bff87fc0 00560290 bff87fc0 005601c4 0056019c 0b75fc5d 00560304
>
>This means apparently I'm passing a bad value to GLUT. I've run a trace on
>the program and it occurs when it's in glutMainLoop() which is C procedure.
>
>If you are willing to take a look you will need Euphoria 2.1, because it
>requires multiple callbacks. You will also need the Mesa dll's. I have
>posted the wrappers (56k) at
><http://www.geocities.com/CapeCanaveral/Campus/8684/Cube.zip>. I have
>provided two demo programs cube.exw and simple.exw, both return with the
>same errors. The Mesa dll's (352k) can be download here
><http://www.geocities.com/CapeCanaveral/Campus/8684/mesa3dll.zip>. DO NOT
>put them in your windows\system directory, make a new directory elsewhere,
>and put them there. Mesa is not 100% OpenGL compliant so if you overwrite
>the ones in your windows\system directory other programs may break. If you
>want more documentation on Opengl and GLUT you can visit <www.opengl.org>.
>I've also include the C programs that I used for the demos, and the
>libraries for OpenGL/GLUT.
>
>You will probably need to edit the sequence "prefix" in each of the
>libraries (glu.ew, glut2.ew, and opengl3.ew), to tell it where you placed
>the Mesa dll's. Other than that they should run (sorta).
>
>Even if you are not successful at figuring out what's wrong, I'd also
>appreciate any feedback.
>
>Thanks
>Paul Martin
>
>