- HOpenGL - Haskell.org

ANNOUNCE: GPipe-1.0.0: A functional graphics API for programmable GPUs
by Tobias Bexelius 04 Oct '09

04 Oct '09

I'm proud to announce the first release of GPipe-1.0.0: A functional graphics API for programmable GPUs. GPipe models the entire graphics pipeline in a purely functional, immutable and typesafe way. It is built on top of the programmable pipeline (i.e. non-fixed function) of OpenGL 2.1 and uses features such as vertex buffer objects (VBO's), texture objects and GLSL shader code synthetisation to create fast graphics programs. Buffers, textures and shaders are cached internally to ensure fast framerate, and GPipe is also capable of managing multiple windows and contexts. By creating your own instances of GPipes classes, it's possible to use additional datatypes on the GPU. You'll need full OpenGL 2.1 support, including GLSL 1.20 to use GPipe. Thanks to OpenGLRaw, you may still build GPipe programs on machines lacking this support. The package, including full documentation, can be found at: http://hackage.haskell.org/package/GPipe-1.0.0 Of course, you may also install it with: cabal install gpipe Cheers! Tobias Bexelius _________________________________________________________________ Hitta kärleken nu i vår! http://dejting.se.msn.com/channel/index.aspx?trackingid=1002952

3 2

ANNOUNCE: OpenGL 2.4.0.1
by Sven Panne 13 Sep '09

13 Sep '09

A new version of the OpenGL package has been uploaded to Hackage. * Fixed maxTextureUnit query. This change didn't make it in the last release... :-( Cheers, S.

1 0

ANNOUNCE: OpenGL 2.4.0.0
by Sven Panne 13 Sep '09

13 Sep '09

A new version of the OpenGL package has bee uploaded to Hackage. * Added contextProfile query. * Made a few tiny internal typing changes to make things work with the latest OpenGLRaw package. Cheers, S.

1 0

ANNOUNCE: OpenGLRaw 1.1.0.0
by Sven Panne 13 Sep '09

13 Sep '09

A new version of the OpenGLRaw package has been uploaded to Hackage. * Use opaque newtypes for the basic OpenGL types, adding the common instances for them, too. Note that this might break programs which depend on the concrete representations. Use explicit conversions where necessary, making all assumptions explicit. * Fixed linking issues on Mac OS X, the package should work out of the box without any warnings or additional flags now. * Fall back to GetProcAddress on Windows when WGL doesn't find an API entry. This should fix problems using core functions with some driver/OS combinations. * Added support for OpenGL 3.2 and the latest NV extensions. * All extensions export all their functions/tokens/types, even if they are in the core. This will keep the extension module exports more stable. * Fixed the types of the glPixelMap functions, using GLsizei instead of GLint for the size, following the OpenGL specification. Cheers, S.

1 0

ANNOUNCE: GLURaw 1.1.0.0
by Sven Panne 13 Sep '09

13 Sep '09

A new version of the GLURaw package has been uploaded to Hackage. * Fixed linking issues on Mac OS X, the package should work out of the box without any warnings or additional flags now. * Fixed the type of gluUnProject4, the near and far parameters are of type GLclampd, not GLdouble. This matches the GLU spec. Cheers, S.

1 0

ANNOUNCE: GLUT 2.2.2.0
by Sven Panne 13 Sep '09

13 Sep '09

A new version of the GLUT package has been uploaded to Hackage. * Fixed linking issues on Mac OS X, the package should work out of the box without any warnings or additional flags now. * Handle additional mouse buttons via 'AdditionalButton Int' in the MouseButton type. * Made a few minor typing adjustments, which don't really matter for the type synonyms used for the basic OpenGL types so far, but which do matter for the upcoming datatype renamings for them. * Aesthetic improvements in the brick shader example. Cheers, S.

1 0

RE: OpenGLRaw on Windows Vista
by Tobias Bexelius 13 Sep '09

13 Sep '09

Hi again, I've just solved my previous problem I had with the new HOpenGlRaw package. It seems that wglGetProcAddress wont retreieve pointers for core 1.1 functions (like glClearColor) and these must be retrieved with standard GetProcAddress calls instead (see http://www.opengl.org/discussion_boards/ubbthreads.php?ubb=showflat&Number=…) I made these changes to cbits/HsOpenGLRaw.hs [18-22]: void* hs_OpenGLRaw_getProcAddress(const char *name) { void* p = wglGetProcAddress((LPCSTR)name); if (p) return p; else return GetProcAddress(GetModuleHandle("opengl32"),(LPCSTR)name); } With those changes everything now works fine! I suggest you incorporate it into the next revision to make HOpenGLRaw work on windows for those of us that has opengl 3.1 hardware and drivers. Regards /Tobias Bexelius From: tobias_bexelius(a)hotmail.com To: hopengl(a)haskell.org Subject: OpenGLRaw on Windows Vista Date: Wed, 2 Sep 2009 21:51:38 +0200 Hi, I'm having trouble with the new Opengl 2.3.0.0 that's based on openglRaw. When I run an old opengl example (http://netsuperbrain.com/blog/wp-content/uploads/2008/11/teapots.hs) that used to work with previous versions of HOpenGL, I get the following error: teapots.exe: user error (unknown OpenGL extension entry glLightfv, check for GL_ARB_compatibility) This seems reasonable (OpenGl 3.1 doesnt support that fixed-function stuff without explicitly turning it on), but when I try to run my own small test program I get similar errors for OpenGL 3.1 stuff too: Test.exe: user error (unknown OpenGL extension entry glClearColor, check for OpenGL 3.1) If I don't put the glut32.dll in the same directory as those examples, I get an error saying something like: teapots.exe: user error (unknown GLUT entry glutInit) so maybe I need to tell my executables where to find the opengl dll to link against. I've tried to put opengl32.dll in the same directory, but with no luck. Suggestions, anyone? I have a Opengl 3.1 capable graphics card (ATI Radeon 4850) with new drivers (Castalyst 9.8). /Tobias Bexelius Använd nätet för att dela med dig av dina minnen till vem du vill. _________________________________________________________________ Med Windows Live kan du ordna, redigera och dela med dig av dina foton. http://www.microsoft.com/sverige/windows/windowslive/products/photo-gallery…

2 1

maxTextureUnit bug
by Csaba Hruska 13 Sep '09

13 Sep '09

Hi! I've found a bug in gl binding. The unmarshal function is wrong, because in this case there is no gl_TEXTURE0 offset. maxTextureUnit :: GettableStateVar TextureUnit maxTextureUnit = makeGettableStateVar (getEnum1 unmarshalTextureUnit GetMaxTextureUnits) unmarshalTextureUnit :: GLenum -> TextureUnit unmarshalTextureUnit x = TextureUnit (fromIntegral (x - gl_TEXTURE0)) Cheers, Csaba Hruska

2 1

Basic Lighting for CAD
by Tom Hawkins 08 Sep '09

08 Sep '09

Hi, I'm looking for a basic lighting configuration for a solid modeller I'm building. I don't need anything elaborate; I just want to set a color and get reasonable shading. I followed the guidelines from http://www.opengl.org/wiki/How_lighting_works, but my scenes are left only black and white (http://funhdl.org/ball.jpg) Are there any specifics to the Haskell API to properly configure lighting? Here are the lighting commands I call during program init: position (Light 0) $= Vertex4 1 1 0 1 ambient (Light 0) $= Color4 0 0 0 1 diffuse (Light 0) $= Color4 1 1 1 1 specular (Light 0) $= Color4 1 1 1 1 lightModelAmbient $= Color4 0.2 0.2 0.2 1 lighting $= Enabled light (Light 0) $= Enabled colorMaterial $= Enabled colorMaterial $= Just (FrontAndBack, AmbientAndDiffuse) materialSpecular FrontAndBack $= Color4 1 1 1 1 materialEmission FrontAndBack $= Color4 0 0 0 1 During a frame redraw, the only lighting functions called are disabling and enabling lighting to draw the coordinate system. Any ideas or recommendations? BTW, I also raised this question to the opengl forum: http://www.opengl.org/discussion_boards/ubbthreads.php?ubb=showflat&Number=… -Tom

2 2

OpenGLRaw on Windows Vista
by Tobias Bexelius 02 Sep '09

02 Sep '09

Hi, I'm having trouble with the new Opengl 2.3.0.0 that's based on openglRaw. When I run an old opengl example (http://netsuperbrain.com/blog/wp-content/uploads/2008/11/teapots.hs) that used to work with previous versions of HOpenGL, I get the following error: teapots.exe: user error (unknown OpenGL extension entry glLightfv, check for GL_ARB_compatibility) This seems reasonable (OpenGl 3.1 doesnt support that fixed-function stuff without explicitly turning it on), but when I try to run my own small test program I get similar errors for OpenGL 3.1 stuff too: Test.exe: user error (unknown OpenGL extension entry glClearColor, check for OpenGL 3.1) If I don't put the glut32.dll in the same directory as those examples, I get an error saying something like: teapots.exe: user error (unknown GLUT entry glutInit) so maybe I need to tell my executables where to find the opengl dll to link against. I've tried to put opengl32.dll in the same directory, but with no luck. Suggestions, anyone? I have a Opengl 3.1 capable graphics card (ATI Radeon 4850) with new drivers (Castalyst 9.8). /Tobias Bexelius _________________________________________________________________ Använd nätet för att dela med dig av dina minnen till vem du vill. http://www.microsoft.com/sverige/windows/windowslive/products/photos-share.…

1 0