cl-opengl-devel

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214 discussions

[cl-opengl-devel] save 3d scene as .obj file
by ronni montoya 28 Nov '11

28 Nov '11

Hi, Is there is a way of saving a 3d scene into a .obj file in common lisp? Is there any library for this, i was looking for info and i just found a library called ply that allow only to read .obj file but not save any idea? thanks R,

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Re: [cl-opengl-devel] mouse-driven camera
by Luís Oliveira 24 Sep '11

24 Sep '11

On Sat, Sep 24, 2011 at 12:03 PM, ronni montoya <ronni.montoya(a)gmail.com> wrote: > Hello im new in this list, im learning opengl with common lisp, i was > wondering if there is a library or example that allow to control the > perspective of the camera with tthe mouse? Here's a tutorial: <http://www.lighthouse3d.com/tutorials/glut-tutorial/>. HTH, -- Luís Oliveira http://r42.eu/~luis/

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[cl-opengl-devel] mouse-driven camera
by ronni montoya 24 Sep '11

24 Sep '11

Hello im new in this list, im learning opengl with common lisp, i was wondering if there is a library or example that allow to control the perspective of the camera with tthe mouse? Is there is an easy way of doing this? thanks Ronny

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[cl-opengl-devel] CL-OpenGL ES?
by Simon Ortiz 19 Jul '11

19 Jul '11

dear cl-opengl people, I'm working on a project to make games on Android and iPhone using Lisp. Thanks to the work of R. Krishnan and S. Ageneau ECL runs on these devices. I'm taking it from there and I'm trying to draw to the screen from Lisp. So far, I've achieved modest results using my own (very small and rudimentary) OpenGL ES 1.1 interface, which uses ECL's low-level FFI facility. But I think that it would be a waste to come up with another OpenGL interface. I'm thinking, why not better use cl-opengl? So, I would like to ask you some questions: - what versions of OpenGL does cl-opengl support? - say I want to contribute to the project and adapt cl-opengl into cl-opengl-es11 (and in the far future cl-opengl-es20), how should I do it? From where can I take it? Is there a similar project I can join? Is anyone interested in joining efforts? Thank you very much in advance for your advice. Sincerely, -- Simón Ortiz B., M.Sc., Ing. en Computación Linux Registered User #388735

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[cl-opengl-devel] Using idle events to drive Slime
by Nikodemus Siivola 08 Jun '11

08 Jun '11

I define (defmethod glut:idle ((window glut:window)) (swank::process-requests t)) to keep Slime responsive while the event-loop runs (when running single-threaded) -- which is nice enough, but a tad inelegant not just because of the double-colon, but because it causes __every__ window to call PROCESS-REQUESTS. I'm wondering if there should be a single global *IDLE-HOOK* (or maybe REGISTER-IDLE-HOOK) in addition to the per-window method approach -- something which causes windows to automatically subscribe to Idle events without registering themselves in *WINDOWS-WITH-IDLE-EVENTS*. Cheers, -- Nikodemus

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Re: [cl-opengl-devel] cl-opengl-devel Digest, Vol 50, Issue 2
by Luke Crook 09 Apr '11

09 Apr '11

{Apologies to the group for top-posting} It looks like a substantial application. It was built using Common Lisp and OpenGL. Now you know it can be done. Isn't that sufficient? -Luke On Apr 9, 2011, at 9:00, "cl-opengl-devel-request(a)common-lisp.net" <cl-opengl-devel-request(a)common-lisp.net> wrote: > Send cl-opengl-devel mailing list submissions to > cl-opengl-devel(a)common-lisp.net > > To subscribe or unsubscribe via the World Wide Web, visit > http://common-lisp.net/cgi-bin/mailman/listinfo/cl-opengl-devel > or, via email, send a message with subject or body 'help' to > cl-opengl-devel-request(a)common-lisp.net > > You can reach the person managing the list at > cl-opengl-devel-owner(a)common-lisp.net > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of cl-opengl-devel digest..." > Today's Topics: > > 1. Re: a substantial Windows app (Brandon Van Every) > On Thu, Apr 7, 2011 at 7:21 PM, Luís Oliveira <luismbo(a)gmail.com> wrote: >> >> The most substantial app I'm aware of is Perfectstorm: >> <http://erleuchtet.org/2008/03/project-overview-perfectstorm.html>. >> However it might not build with a recent cl-opengl. > > The SVN repository given in that blog entry appears to be dead. Do > you know of some other way to obtain the source? I suspect this > project is no more. The blog says, "But beware! the current state is > not that presentable: you’ll just see pathfinding debug output at the > moment. When a first dummy is playable and the code is cleaned up a > bit we’ll make a project page." Google doesn't reveal any such page. > > > Cheers, > Brandon Van Every > > > _______________________________________________ > cl-opengl-devel mailing list > cl-opengl-devel(a)common-lisp.net > http://common-lisp.net/cgi-bin/mailman/listinfo/cl-opengl-devel

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[cl-opengl-devel] a substantial Windows app
by Brandon Van Every 08 Apr '11

08 Apr '11

Hi, I'm pretty new to Common Lisp, Clozure CL, Quicklisp, and cl-opengl. I'm looking for a substantial open source app that uses cl-opengl and builds on Windows. By "substantial" I mean more than a very basic game or tutorial or demo. Something that really puts cl-opengl to work, preferably with relatively modern OpenGL API functionality, such as vertex arrays and shaders and not glBegin glEnd semantics. Like, a First Person Shooter would be substantial, or a medical visualization would be substantial. The purpose is to understand how the substantial app is built, how robust or buggy the app is on this platform, and to evaluate the OpenGL performance of the app. Is there some easy way in Quicklisp to find all the packages that use cl-opengl? (ql:system-apropos "cl-opengl") only lists cl-opengl itself. I've been Googling about cl-opengl but that method is proving to be slow. "Builds on Windows" is important because sometimes packages want things that don't readily exist on Windows. For instance, until-it-dies makes use of FTGL, an obsolete library that hasn't been worked on since 2008. It doesn't have any Windows binaries for the foreign .dlls. Although I could go through the pain of modernizing an old VC8 .sln file, and renaming dependencies to FreeType per some other website I read, it's just not worth it to me. I want to look at a substantial app under active development that actually works on Windows. Generally I can handle foreign .dll dependencies as long as those foreign .dlls are under active development. I've been shoving various "SDKs" into C:\Program Files\ and adding their .dll directories to my PATH. It keeps Quicklisp happy. No idea yet if the end products will actually work, as .dll Hell could rear its ugly head. Cheers, Brandon Van Every

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[cl-opengl-devel] Bug in MAKE-NULL-GL-ARRAY
by Mason Smith 16 Feb '11

16 Feb '11

The current make-null-gl-array fails to run as currently defined. When called with (gl:make-null-gl-array :unsigned-short), SBCL gives the following error: 0 fell through CTYPECASE expression. Wanted one of (SYMBOL FUNCTION). [Condition of type SB-KERNEL:CASE-FAILURE] The problem seems simply to be that the arguments when calling MAKE-GL-ARRAY-FROM-POINTER are reversed. Specifically, instead of (make-gl-array-from-pointer (null-pointer) 0 type) the body of MAKE-NULL-GL-ARRAY should be (make-gl-array-from-pointer (null-pointer) type 0) Mason

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[cl-opengl-devel] Invoking cl-opengl under ubuntu
by Greg Bennett 29 Jan '11

29 Jan '11

Good afternoon from Greg Bennett I an venturing into graphics in cl undet linix. Specifically I am running ccl 64-bit under Ubuntu 10.04 using emacs+slime as an interface; but my lisp experience is from Allegro under Windows. Perhaps it is not surprising that I am (slightly) baffled by some of the set-up activities. I downloaded cl-opengl and read the .asd files for it, and for glu, glut, glut-examples too. I saw that all depended on cffi, so I used Ubuntu's apt-get install to do just that - fetch and install cffi - which went smoothly. It took me a while to find out where it was located (!) so I could fix up asdf:*central-registry* with a path to cffi.asd [Off-topic: is there an easy way to find where packages are installed ? The poking about I have done has yielded noting useful. Should I have 'known' cl-cffi would wind up in /usr/share/common-lisp/systems ?] Having twiddled the registry, I used (asdf:operate 'asdf:load-op 'cffi) which started cheerfully but then stopped with an simple-file error. For all the .lisp files in, for example, /usr/share/common-lisp/systems/source/alexandria are owned by root. It was in trying to process alexandria.lisp that things halted. I am the sole user of the linux box, but it seems that I need a way to tell ccl that it should run as root. If I am to build cl-opengl I have to get past this block, so I hope that someone can provide a magic incantation or two. Thanks for all assistance and advice Cheers /Greg Bennett

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[cl-opengl-devel] thanks from a happy developer!
by Brian Taylor 01 Nov '10

01 Nov '10

Greetings all! I just wanted to say thank you for all your work making cl-opengl such a fantastic bridge between cl and opengl. I'm constantly delighted to see how lispy it feels to use this library and how easy it is to be productive while referring to opengl documentation geared towards other languages. This is a really nice library to work with. -wubo

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