November 2003 - HOpenGL

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by ��ģ�� 23 Nov '03

23 Nov '03

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ANNOUNCE: HOpenGL 1.05 released
by Sven Panne 15 Nov '03

15 Nov '03

HOpenGL, a Haskell binding for OpenGL and GLUT version 1.05 I am pleased to announce the sixteenth release of the Haskell binding for GL 1.2.1 / GLU 1.3 / GLUT 3.7beta. It offers easy access to *the* industrial strength 3D graphics API and a GUI toolkit. More details about HOpenGL can be found at http://haskell.org/HOpenGL/ This is a compatibility/bug fix release with the following changes: * Fixed a memory allocation bug for GL state queries. * Works with new hierarchical libraries now. * Always use the correct calling convention. * The build system works with recent versions of GHC and GreenCard now. As always, feedback and/or patches are highly welcome. A note for people on the bleeding edge: If you are interested in the future of HOpenGL and its new API, you might wish to build GHC from CVS, configuring with `--enable-hopengl'. This will result in a GHC with two additional packages `OpenGL' and `GLUT'. The APIs have improved quite a bit and are now modeled around the notion of state variables. Furthermore, OpenGL's extension mechanism is now supported on all major platforms, including Linux, Windows and Mac OS X. Note that this is still work in progress, but early feedback would be very useful. Have fun! Sven

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Re: [HOpenGL] WinXP, ghc-6.0.1, HOpenGL-1.05 .. problems
by C.Reinke 15 Nov '03

15 Nov '03

- added GL/glut.h - applied HOpenGL-1.04 install patch - replaced evil hack with "ghc --print-libdir" - configure; make depend; make install again goes through, but this time there is a Graphics.UI.Glut (under HOpenGL, not in the main Graphics, btw). so far so good, but trying to compile the examples in my old FunWorld July snapshot doesn't get very far at all: Compiling Main ( Boids.hs, obj/Boids.o ) Linking ... c:/ghc/ghc-6.0.1/libHOpenGL.a(GL_Marshal__1.o)(.text+0x28):ghc2444.hc: undefined reference to `__stginit_CString_' c:/ghc/ghc-6.0.1/libHOpenGL.a(GL_Texturing__1.o)(.text+0x5a):ghc2844.hc: undefin ed reference to `__stginit_List_' c:/ghc/ghc-6.0.1/libHOpenGL.a(GL_BasicTypes__1.o)(.text+0x1e):ghc2944.hc: undefi ned reference to `__stginit_Bits_' make: *** [Boids] Error 1 Further suggestions?-) Claus

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Debian&HOpenGL, undefined symbol: glPixelStorei
by Ville Tirronen 15 Nov '03

15 Nov '03

Hi, I'm trying to get HOpenGL working on a unstable debian box. Since there were suitable packages available (ghc6, ghc6-hopengl) I installed those. After trying to "ghci6 -package GLUT" I get the following error message: Loading package OpenGL ... ghc-6.0.1: can't load .so/.DLL for: GLU (/usr/ X11R6/lib/libGLU.so: undefined symbol: glPixelStorei) With packages for ghc5 this seems to work but I cannot get any example compiled. The result for "ghc5 --make -package GLUT Planet.hs" is: ghc-5.04.3: can't find module `GL' (while processing "Planet.hs") Any help appreciated, Ville Tirronen

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WinXP, ghc-6.0.1, HOpenGL-1.05 .. problems
by C.Reinke 13 Nov '03

13 Nov '03

Having upgraded to ghc-6.0.1 since I last used HOpenGL, I once again embarked on re-installing.. - ghc-6.0.1 seems to lack GL/glut.h? copied that in.. - tons of warnings (most but not all about deprecation) - no errors stopping configure/make depend/make/make install.. there seem to be hidden errors, though, starting in make depend right after the green-card calls: cut: /cygdrive/c/ghc/ghc-6.0.1/bin/ghc: No such file or directory (`which ghc` on cygwin delivers the filename without .exe, but even if I add the suffix for cut, and try it out on the commandline, the filter doesn't find anything; I've got a feeling of deja vu on this one, btw..) - no Graphics.UI.GLUT in sight after install? I remember that ghc-5.04.2 with HOpenGL-1.04 and the usual patches worked without (visible) problems, so before I look for what is going wrong on my system, I just wanted to check whether the Subject-configuration is known to work on other people's systems? Cheers, Claus PS. Perhaps I shouldn't be looking at these old versions anyway, but this is still what HOpenGL users are most likely to have. Are there any plans for when the cvs-version will take over? And do I have a chance of building the cvs-version of HOpenGL without building any of the other stuff in fptools (ie. can I just use ghc-6.0.1 binary release to build it)?

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Size and position of subwindows
by Patrick Scheibe 13 Nov '03

13 Nov '03

Hi there. I'm modifying an old API-Style program and want to compile it with the new OpenGL-Haskell-API. In the past one defined a subwindow in the following way: uniW<- createSubWindow mainW (WindowPosition space space) (WindowSize 600 400) Now the parameters are away. You define a normal window by setting the statevars and create one. initialWindowSize $= Size 100 100 initialWindowPosition $= Position 100 100 createWindow progName Whats about subwindows? What have to be done if you want to create a subwindow at position 50,50 relatively to mainwindow with a specific size? And how does the reshaping of subwindows work? If you resize your mainwindow, the mainreshape is called with the new size. When and with what size is the subwindow reshapecallback-func called by OpenGL? Or am I forced to call it by myself in the mainreshape? Greetings Patrick

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problem with displayCallback and Double buffering
by Marc A. Ziegert 05 Nov '03

05 Nov '03

does anyone else have this problem? i want to use double buffering, but swapBuffers does not seem to work. to set the active window to... the active window (i think that has to work!) does not work, too. but i am able to compile and run glut examples with double buffering written in c. coeus@titan ~/Documents/haskell/hopengl/problem $ ghc -package GLUT -package OpenGL first.hs -lglut coeus@titan ~/Documents/haskell/hopengl/problem $ ./a.out displayModePossible? ...True begin swapBuffers

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