- HOpenGL - Haskell.org

news on FFI?
by Andre W B Furtado 24 Jan '02

24 Jan '02

Hi. I heard Manuel released a new FFI Addendum. I would like to know if that will help to solve that "uncaught exception problem" when leaving HOpenGL programs. -- Andre

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Open GL
by Nicolas Oury 07 Jan '02

07 Jan '02

I am very interested in OpenGL under Haskell and I am wondering if there re a way I could be usefull. By the way, I have a small and ugly (very dirty, no configure, no documentation) binding of wht in SDL library can be used to get read of GLUT ( I think callback aren't very easy o use in a functionnl way. I can make it cleane and put it on a web page if anyone is interested. Make me know. I wonder if there is any preversion simulating the draft version of OpenGL 2.0 on which one could work to be ready when the standard move. Best Regards, Nicolas Oury

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compilation problems
by Shuying Wang 05 Jan '02

05 Jan '02

Hi, I've just joined the list and have looked through the backlog of emails but I don't see anyone who's had my problems. Just a few questions... I would like to know what @green_card_comma@ does, as that generated an error in GLUT_Init.gc when I ran make depend. Replacing "@green_card_comma@" with "," seems to resolve it. Also, I have glut3 but code pertaining to glut4.x wasn't commented out? I had a look at configure.in and under " Test GLUT Xlib implementation", I think something like else glut_geq_4_9="-- " glut_geq_4_11="--" glut_geq_4_13="-- " is missing? Then I ran make, and I got the following error: /usr/bin/ghc -syslib lang -split-objs -odir GL_Errors -fglasgow-exts -I/usr/X11R6/include "-#include <GL/glut.h>" -recomp -Wall -O -c GL_Errors.hs -o GL_Errors.o /tmp/ghc6071.hc: In function `s2n5_ret': /tmp/ghc6071.hc:295: `GLU_INCOMPATIBLE_GL_VERSION' undeclared (first use in this function) /tmp/ghc6071.hc:295: (Each undeclared identifier is reported only once /tmp/ghc6071.hc:295: for each function it appears in.) /tmp/ghc6071.hc: In function `GLzuErrors_zdwunmarshallzuError_fast1': /tmp/ghc6071.hc:654: `GLU_INCOMPATIBLE_GL_VERSION' undeclared (first use in this function) make[1]: *** [GL_Errors.o] Error 1 And I'm not sure what I'm missing. Can someone please help me? I tried installing HOpenGL-1.01 with gc-2.03 and ghc-5.02 under debian (woody). thanks, Shuying

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Website has moved
by Sven Panne 04 Jan '02

04 Jan '02

The HOpenGL web site has moved to haskell.org, its new URL is: http://haskell.org/HOpenGL Apart from cosmetic changes, it now contains * version 1.01 again, which seems to have disappeared after a server crash at the previous site >:-( * a short description of HOpenGL's future * a list of bugs and patches for SGI's OpenGL .spec files Have fun, S.

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updateIORef
by Andre W B Furtado 13 Dec '01

13 Dec '01

Why does module UserInput (from the Misc examples) need to import module Misc just because of updateIORef? Isn't updateIORef already defined in module IOExts? -- Andre

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Texture problem
by Andre W B Furtado 11 Dec '01

11 Dec '01

I would like to write a program that does the following: 1. Create a TextureName for later use 2. Initialize GLUT and GL routines, creating a window 3. Draw something using the TextureName of step 1 Unfortunately, creating the TextureName seems not to work if no window was created. The program above will draw an empty polygon where it should have drawn a texture filled polygon. If I change step 1 by 2 (and vice-versa) the program works well, but this is not exactly what I want. Does anyone know why this happen? (in other words, why must a window be opened BEFORE I start do deal with a TextureName?) -- Andre

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GLfloat vs. GLdouble
by Andre W B Furtado 11 Dec '01

11 Dec '01

[sorry for the silly question] Which is the correct way to convert a GLfloat to a GLdouble? (There is any Prelude function that converts a Float to a Double?) -- Andre

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Quadrics
by Andre W B Furtado 27 Nov '01

27 Nov '01

In OpenGL, the following command is used to create a new Quadric Object: qObj = gluNewQuadric(); And, to delete it, we have: gluDeleteQuadric(qObj); In HOpenGL, to create a new Quadric, the command is: qObj <- newQuadric But how do I issue deleteQuadric? Its signature is: deleteQuadric :: QuadricObj -> Addr -> IO () but I don't know how to use it. What is this "Addr" parameter for? -- Andre

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make clean bug?
by Andre W B Furtado 19 Nov '01

19 Nov '01

(More feedback on HOpenGL-1.01 with GHC-5.02 + Cygwin + Windows98): One day I decided to issue the "make clean" command to free some space in HOpenGL. I was surprised when I discovered that, after doing this, my programs now complain: "could not find interface file for GLUT/GL". After I re-compiled HOpenGL once again, everything came back to normality. Is this a "make clean bug"? I noticed some "new" warning messages when compiling HOpenGL (I got the latest pack from Sven's site): Warning: This binding for `edges' shadows an existing binding -- Andre

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RE: Strange fatal error
by Julian Seward (Intl Vendor) 19 Nov '01

19 Nov '01

We fixed some obscure GC-related bugs in 5.02. The fixes are in 5.02.1. When you try it with 5.02.1, does the problem still happen? J -----Original Message----- From: Andre W B Furtado [mailto:awfurtado@uol.com.br] Sent: Tuesday, November 13, 2001 7:41 PM To: glasgow-haskell-users(a)haskell.org Cc: hopengl(a)haskell.org Subject: Strange fatal error Can anyone explain me the following error? fatal error: scavenge: unimplemented/strange closure type 0 @ 08C03FD0 (this happened with a program that reads and do some manipulations in a 3MB bitmap file, using HOpenGL-1.01 and GHC-5.02 under Windows 98 + Cygwin) Thanks, -- Andre

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