cl-opengl-devel

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214 discussions

Re: [cl-opengl-devel] Patch for 2d mipmap generation and more mouse buttons
by Luís Oliveira 13 Feb '08

13 Feb '08

On 13/02/2008, Charlie McMackin <charliemac(a)gmail.com> wrote: > I'll give it a try, but it seems that no one else is hitting the error > on wheel-down due to -1 not be enumerated in mouse-button-state > either. (see other thread where I sent patch) Leads me to be more > suspect of my set-up. IIRC, I get that weird -1 when using the glut:mouse-wheel event. -- Luís Oliveira http://student.dei.uc.pt/~lmoliv/

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[cl-opengl-devel] Translating checker.c
by Sohail Somani 04 Feb '08

04 Feb '08

Hello, I am trying to translate the checker.c example from the textures chapter: http://www.sgi.com/products/software/opengl/examples/redbook/source/ checker.c Unfortunately, the code http://paste.lisp.org/display/55290 does not work for some reason. Any ideas? Thanks! -- Sohail Somani http://uint32t.blogspot.com

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[cl-opengl-devel] cl-opengl and clx naming conflict
by David Lichteblau 21 Jan '08

21 Jan '08

Hi, I was hoping to add cl-opengl as a main project to clbuild. Unfortunately cl-opengl and CLX both define a package called GL, so we cannot dump a core file including them. Is there a chance that cl-opengl might switch to a more specific package name? d.

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Re: [cl-opengl-devel] cl-glfw 0.3 with cl-opengl interoperability
by William Robinson 11 Jan '08

11 Jan '08

Luís Oliveira wrote: > In what ways does cl-glfw-opengl differ from cl-opengl? Well, it's more in-line with the cl-sdl style of opengl binding. As, initially I wrote my own OpenGL bindings because I was having difficulties with cl-sdl and lispbuilder on Mac OS X (and was generally averse to GLUT). So the main differences are: * You specify the function's “command suffix”, eg. (gl:color-3f 0 0.5 1) instead of just (gl:color 0 0.5 1), * The GL“enum” constants aren't defined in one large cffi defcenum, but they are just defined as constants, eg. use (gl:clear gl:+color-buffer-bit+) instead of (gl:clear :color-buffer-bit). * All of the OpenGL API and extensions are automatically generated from opengl.org's spec files. Though I have learned (after I wrote the generators) that there is a branch of cl-opengl with more dynamically generated stuff from spec files. * Each registered extension is a separate asd file (this includes the OpenGL and GLU versions, as well) * Instead of focusing on too many individual cases of lispification, I have striven to make (where possible according to the spec files) Lisp sequences transparent as OpenGL functions' array-pointer parameters (though this does require some extra allocation. of course). On the whole, I'd say the main difference is that cl-glfw-opengl is more OpenGLy and cl-opengl is more Lispy in style. Ciao bill, who forgot to CC the list first time.

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[cl-opengl-devel] cl-glfw 0.3 with cl-opengl interoperability
by William Robinson 11 Jan '08

11 Jan '08

Hi. Just a little note to say I've released cl-glfw-0.3 which now is able to work with cl-opengl (as well as with its own bindings, cl-glfw-opengl). So, maybe this option apart from SDL (with its custom application entry-point issues) and GLUT (for when you get stuck in a main loop) will be appealing to some. The only caveat, at the moment, is that libglfw mostly only comes as statically linked libraries by default. We have been petitioning the glfw maintainers for dynamically loaded libraries by default to ease this problem somewhat. Thanks for listening </flamebait> Ciao bill

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[cl-opengl-devel] Fun GPLed Common Lisp OpenGL Molecule Viewer
by doug＠hcsw.org 21 Dec '07

21 Dec '07

Hi LispNYC/cl-opengl-devel! I just released a new Common Lisp program that I quickly hacked for a school assignment and have since cleaned up a bit. We were supposed to use C but I, of course, used lisp. :) It's a fancy 3D, interacive viewer for molecules using the OpenGL graphics libraries and the awesome cl-opengl bindings. Currently included molecules: water, ethanol. Read more about it and download it here: http://hcsw.org/blog.pl I was wondering if anyone can confirm this works for them on whatever environments or has any other comments. Also, cl-opengl-devel: feel free to include it as an example with the bindings if you feel it will help anyone! The random walk framerate testing mode is neat. The code is also good for getting an intuitive feeling for how GL lighting works as well as a good example of using rotation matrices in CL (gl:with-pushed-matrix is brilliant). But as the blog post concludes: The next generation of this program will not be a way to view molecules, but instead a way of interactively exploring diverse types polyhedron, like, for instance, the icosahedron and the infinite class of anti-prisms. And don't forget that every polyhedron has a dual (where the centre of each face becomes a vertex). Flipping between a polyhedron and its dual in real-time will be sweet. Doug Hoyte Chief Operating Officer HCSW Silicon Graphics Division

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[cl-opengl-devel] RFC: Merging thomas branch into main
by Charlie McMackin 19 Dec '07

19 Dec '07

Since Luís hinted in a previous message to the list that consensus need be sought on whether or not to merge cl-opengl-thomas in to the main tree, I thought I would get the ball rolling for when he is free to do so (or not as the case may warrant). I offer these points as pro-merge: - With CFFI-new-types merged into CFFI-main, the main cl-opengl repo probably won't compile for anyone starting out using 'darcs get' or (require :cl-opengl) and will break for anyone using 'darcs pull' - Most recent patches have been requested to patch against the thomas branch - As far as I know, there's been no regression in the GL functionality area merge cons: - In it's current state, thomas will break some cl-glut-examples demos Anyone concluding differently or similarly? Comments? Charlie McMackin

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[cl-opengl-devel] Patch for faster texture uploads
by Bart Botta 19 Dec '07

19 Dec '07

gl:tex-image-2d seems a bit slow (~23 sec for a 1k by 1k texture on SBCL 1.0.2 win32), attached patch speeds it up ~100x (to ~0.25 sec). Problem was that the element type in with-opengl-array wasn't constant (since it had been passed as a parameter to tex-image-2d) so cffi couldn't optimize for a specific type. Patch moves the type check out of the copy loop, and duplicates the loop for each type, so each case can be optimized individually. -- Bart

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[cl-opengl-devel] Patch for texture coord generation.
by Mikael Lax 19 Dec '07

19 Dec '07

Hello, I've made a small patch to implement tex-gen (see 2.11.4). I had use of it the other day and I saw it was missing. I also noticed two small typos in package.lisp that I fixed (wrong sections being referenced in 2.11.*). Sincerely, Mikael Lax

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[cl-opengl-devel] Patch for some shader/object queries.
by Mikael Lax 19 Dec '07

19 Dec '07

Hello, I've implemented some of the functions in section 6.1.14 Shader and Program Queries. This also led to the FIXMEs in get-active-attrib and get-active-uniform being fixed (they relied on fixed buffer-sizes which are now queried). Sincerely, Mikael Lax

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