March 2011 - HOpenGL - Haskell.org

Render fonts in HopenGL
by er9999 25 Jul '11

25 Jul '11

Hello, Can anyone give me an example for fonts rendering? I tried to use FTGL library, but it is too complicated on Windows(compile). Is it possible to do it in a simple way? I need more than the given example in red book(Font.hs), something like outline font. By the way, I am new in OpenGL and Haskell, so the real exmaple should be the best. Thanks!

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How to contact OpenGL package maintainer (where is Sven?)
by Jason Dagit 06 Apr '11

06 Apr '11

I sent the message below to Haskell-Cafe about a week ago. I got one response saying that Sven has disappeared in the past but reappeared when updates were necessary. I still haven't heard from Sven. Now I'm widening my search. My original email to Sven was on March 11th. It looks like the OpenGL packages on hackage[1,2,3,4] have not been updated in some time. No updates later than Oct 2009. I tried to email Sven directly using the email address listed on hackage but after over two weeks I still haven't heard from him. I sent some patches to the opengl list about a week ago but I noticed that Sven hasn't posted on that list since Oct 2009 when he released the current version of OpenGLRaw. None of the public darcs repos have patches newer than Oct 2009. Also, the homepage url listed in the packages is a 404: http://www.haskell.org/HOpenGL/ My concern is that Sven has disappeared for some reason. I hope he's well. He has always done top notch work in the past maintaining these libraries. Perhaps he's simply busy or lost interest? Does anyone know if he was looking for a new maintainer? Perhaps you've heard from him more recently than Oct 2009? If a new maintainer is needed, I would consider nominating myself :) Thanks, Jason [1] http://hackage.haskell.org/package/OpenGLRaw [2] http://hackage.haskell.org/package/OpenGL [3] http://hackage.haskell.org/package/GLURaw [4] http://hackage.haskell.org/package/GLUT

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HOpenGL postRedisplay in Mac
by Francisco Listas 21 Mar '11

21 Mar '11

Hello all, I am following the tutorial on http://www.haskell.org/haskellwiki/OpenGLTutorial2 everything works ok, but the moment I add "postRedisplay Nothing" to the idle function nothing is displayed. I've tried passing the current window to postRedisplay, adding double buffering (it is supposed to be done internally on mac) but no image. If I comment out postRedisplay then I can see the image but no animation I am using Snow Leopard 10.6 and GHC from the 32bit Haskell Platform 2010.2.0.0 Any clue to what's happening? Thx, Francisco

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Patches to cabal files
by Jason Dagit 17 Mar '11

17 Mar '11

Hello, I had a hard time finding the source for the opengl bindings because the locations mentioned in the .cabals were no longer valid. In particular, http://www.haskell.org/HOpenGL/ is a 404. Eventually I stumbled on the wiki page, so I changed the above URL to http://www.haskell.org/haskellwiki/Opengl and added a link to the darcs repo in each cabal file. Also, 'cabal sdist' gave a few warnings and one error so I fixed those as well. I've attached patches for all these changes. Please let me know if you have any questions or concerns. Thanks, Jason

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Add texture to Sphere object
by er9999 11 Mar '11

11 Mar '11

Hello, How can I add a texture to the sphere object? In c++, I only need to do quadratic=gluNewQuadric(); gluQuadricNormals(quadratic, GLU_SMOOTH); gluQuadricTexture(quadratic, GL_TRUE); Then I can bind a texture to the sphere, can we do that in HOpenGL? If so, can anyone give me an example for that? I am new for Haskell and not sure how to convert to Haskell version. Thanks!

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Load image for texture mapping
by er9999 05 Mar '11

05 Mar '11

Hello, Does anyone know a way to read image in? I found a bmp loader, but it is a little out of date(I got cannot find module IOExts error.) And it seems this module is not the binding of Haskell or Hopengl. Can anyone give me some help? Thanks! -- Yu

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