January 15, 2009 
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January 15, 2009 [00:02:22] *** HuntsMan has joined ##opengl[00:02:28] *** JernejL_ has joined ##OpenGL[00:04:18] *** Killari has joined ##OpenGL[00:04:21] <vick> fixermark: Well i am trying to use the code at http://sidvind.com/wiki/Skybox_tutorial. i am calling it at the end the scene displaying, but nothing is happening[00:04:35] <vick> fixermark: Maybe the box is too small ? i removed the gluLookAt line tho[00:05:51] <vick> Worse yet, when i added it , not only did it not work, but it removed all the textures i added so far and made all the objects white[00:07:19] <GuShH> always keep track of the opengl states... I'd say you should implement a proper rendering engine before getting into such things but oh well that's me always doing the right thing.[00:07:22] *** elite01 has quit IRC[00:07:45] *** Acryler has quit IRC[00:08:18] <vick> GuShH: What do you mean by proper rendering engine ?[00:08:47] <MatthiasM> vick: OpenGL is a state machine - you set states and the execute commands[00:08:51] <vick> GuShH: I am already loading files and rendering them with no problem, however i cannot apply the concept of the skybox for some reason[00:09:05] <GuShH> pretty much abstraction layers that sit on top of the immediate code and a rendering pipeline to handle all of your objects[00:09:13] <MatthiasM> vick: this makes it easy on one hand, but complicated when you want to plug in other code[00:09:24] <GuShH> which will allow you in the future to implement useful things such as frustum culling and whatnot.[00:09:31] <GuShH> even a scene graph.[00:09:41] <vick> Ahh.[00:09:50] <vick> But that doesn't explain why that code won't work[00:10:13] <GuShH> no but it tells you that shortcuts aren't always the best paths.[00:10:18] <vick> it's a simple concept, just create a box and add textures to it[00:10:26] <MatthiasM> eg my render engine only knows about geometry, shaders, textures, and a few render states[00:10:34] <vick> However one thing i dont understand is, how does it bring the whole scene already drawn within that box ?[00:10:49] <MatthiasM> vick: it doesn't[00:11:02] <GuShH> I didn't check the link but you usually do it in 2 passes to avoid any z-buffer issues.[00:11:09] <MatthiasM> vick: everything you execute won't change what as been done before[00:11:40] <vick> hmm i am a little bit confused[00:11:40] <MatthiasM> you can render simple sky boxes without depth test/write[00:11:49] <MatthiasM> then the size of the box doesn't matter at all[00:12:15] <vick> how ?[00:12:21] <MatthiasM> the only important thing is that you position the camera in the center of the box[00:12:23] <GuShH> the red book is your friend[00:12:40] <vick> MatthiasM: What about the lookat point ?[00:12:55] <MatthiasM> lookat is just a helper[00:13:05] <MatthiasM> understand what the parameters are[00:13:16] <vick> it's where the camera is looking at :P[00:14:32] <vick> Moreover why does it affect the rest of my scene when the all the operations are placed within glPushAttrib and glPushMatrix[00:15:41] <MatthiasM> I'm not going to debug your code[00:16:15] <MatthiasM> just look at what code you added - try to comment things out until you found the issue[00:16:30] <MatthiasM> and read in the SDk about the function to know what they do[00:16:41] <vick> MatthiasM: That's not what i am asking for, i am just saying it shouldn't affect the rest of the scene if it is placed within push and pop, correct ?[00:16:51] <vick> i'll do so now[00:17:16] <MatthiasM> and remember to check for errors[00:18:07] *** Jernej has quit IRC[00:19:48] *** cs_student has joined ##OpenGL[00:21:42] *** Jophish has quit IRC[00:21:50] *** cs_student is now known as poseidon[00:21:56] *** amz has joined ##opengl[00:24:23] *** HuntsMan has quit IRC[00:30:11] <GuShH> vick : copy&paste will only get you so far. Read a book or two not only on OpenGL but also in general programming. Writing code to reach a goal in a rush isn't always the best idea, chances are you'll end up rewriting it soon after you discover how little usefulness that code has. And all due to poor planning on your side!. Sit down and think it through, design your interfaces, make sure it all makes sense and only then try to i[00:30:11] <GuShH> mplement in code. Although that's not the end of the development cycle, it sure is a step up on what you're currently doing.[00:30:13] *** Bollinger has quit IRC[00:30:52] <GuShH> Sigh ... this client breaks up the strings in a rather sad way.[00:32:17] *** itewsh has quit IRC[00:32:59] *** cplusplus2 has quit IRC[00:37:45] *** iion has joined ##OpenGL[00:40:11] <fixermark> vick: In general, I draw the skybox first, then draw everything else.[00:40:45] <fixermark> Since one generally draws skyboxes with depth-testing off, this guarantees the skybox is "behind" everything else in the scene. Which is why the size of the skybox does not matter (as long as the camera is inside of it).[00:41:47] *** Amorphous has quit IRC[00:42:53] <vick> fixermark: I do change the camera position however when i move, will that make errors ?[00:43:12] *** tmccrary1 has joined ##OpenGL[00:43:27] <fixermark> vick: When it comes to the skybox, camera position doesn't matter as much as camera orientation.[00:43:55] <ol1veira_> fixermark: don't you mean depth-writes, when rendering before the scene?[00:44:19] <fixermark> (hypothetical situation: consider what space looks like around our solar system from the position of Earth as opposed to the position of Jupiter. Skyboxes are 'infinitely far away' in that sense; position doesn't matter to their appearance)[00:44:53] *** Amorphous has joined ##opengl[00:44:58] <fixermark> ol1veira_: I really mean glDisable(GL_DEPTH_TEST) ;)[00:46:47] *** dabreegster has joined ##OpenGL[00:47:23] <ol1veira_> I don't think I understand it then (but what do I know)[00:47:24] *** iion has quit IRC[00:47:53] <fixermark> ol1veira: It's a subtlety of OpenGL that tripped me up for awhile. glDisable(GL_DEPTH_TEST) disables both depth-testing AND writing to the depth buffer.[00:48:08] <fixermark> "Note that even if the depth buffer exists and the depth mask is non-zero, the depth buffer is not updated if the depth test is disabled."[00:48:24] <ol1veira_> Oh, that makes it clear ;)[00:48:35] <fixermark> (It took me some searching to figure out how to update the depth buffer without discarding fragments)[00:48:48] <TheFlash> glDepthMask can be used to disable writing.[00:49:16] <vick> lol, that is funny, the texture i am applying for the skybox instead got drawn on the objects in the scene[00:50:16] <fixermark> vick: That's why people are suggesting you take some time to work in more of a graphics engine---particularly a state controller. The OpenGL state machine can be a real bitch in terms of letting operations "bleed" from one object in the scene to another object in the scene.[00:50:55] <fixermark> We use a 'state guardian' object, of which there is a current one. To draw something in our engine, you create a new state guardian, configure it as you want, and then set it as 'current.'[00:51:17] <fixermark> Setting it as current compares it to the current state guardian, changes any states that are different, and then sets this new one as current, discarding the old one.[00:52:05] <fixermark> (When I say 'object' in the last two messages by the way, I mean C++ classes-and-instances object, not visual object. Gah, overloaded words) ;)[00:53:11] <vick> I dont get the idea of the state guardian[00:53:19] *** reprore_ has joined ##OpenGL[00:53:58] <TheFlash> Just, try to be careful.[00:54:34] *** fixermark has left ##OpenGL[00:55:23] <dabreegster> I'm trying to write a simple 2D scrolling example, overhead view. The way I'm conceptually thinking about this is that I can draw GL_QUADs everywhere ,even "off screen" and then set the camera by translating the scene. So I can draw everything once, and my refresh-after-keypress code would just "move the camera." Is that correct?[00:56:11] <TheFlash> Writing an "engine" instead of writing the application you are willing to do, may not be the best practise.[00:56:34] *** calav3ra__ has joined ##opengl[00:57:24] *** rnx has quit IRC[00:57:44] *** NotWil has joined ##OpenGL[00:59:25] *** calav3ra has joined ##opengl[01:01:12] *** eXtronuS_ has quit IRC[01:02:36] *** DGMurdockIII has joined ##OpenGL[01:03:23] *** Jernej has joined ##OpenGL[01:07:32] <DGMurdockIII> I don't suppose you know if it's possible to find the angle between two line segments?[01:08:07] *** calav3ra_ has quit IRC[01:08:20] <AlastairLynn> yes[01:08:47] <AlastairLynn> find unit vectors in the direction of both line segments[01:08:55] <AlastairLynn> take the arcsin of the dot product[01:09:21] <DGMurdockIII> is that all[01:09:26] <AlastairLynn> i lie[01:09:28] <AlastairLynn> it's the arccos[01:09:33] <AlastairLynn> and yes[01:09:34] <AlastairLynn> that is all[01:10:26] <DGMurdockIII> thanks[01:11:18] *** neoneye has quit IRC[01:14:50] *** `Wil has quit IRC[01:15:26] <vick> Do i need to make something after i do glBindTexture at the end to clean up or signify that i ended using that texture or so ?[01:15:40] <AlastairLynn> no[01:15:40] *** calav3ra__ has quit IRC[01:15:47] *** AlastairLynn has quit IRC[01:16:12] <dabreegster> AlastairLynn: I'm trying to follow some examples now and I'm not getting it. http://pastebin.com/m4e89a02a Drawing quads once and then trying to mess with the camera and not redraw.. is that right?[01:18:13] *** JernejL_ has quit IRC[01:18:19] *** jcazevedo has quit IRC[01:19:18] *** Suprano has quit IRC[01:19:48] *** Kasu has quit IRC[01:20:01] *** barbar__conan has joined ##OpenGL[01:27:02] <dabreegster> In other words, can I go through drawing GL_QUADs once and then "scroll" over by setting the camera and translating? Or do I have to keep redrawing the squares?[01:27:56] <mlucassmith> you have to redraw[01:29:08] <dabreegster> Alright.. so there's no point in translating once to account for the entire camera and then individual times for each tile, since I loadidentity after each tile to reset. I'd have to push/pop the matrix with the camera translation so I may as well, for each tile, just subtract camera_x[01:31:13] *** rnx has joined ##opengl[01:34:02] *** Quentarez has quit IRC[01:35:49] *** iion has joined ##OpenGL[01:36:18] *** Gorgoroth has quit IRC[01:42:44] *** GinoMan has quit IRC[01:44:12] *** loufoque has quit IRC[01:44:41] *** HuntsMan has joined ##opengl[01:45:38] *** korff_home has quit IRC[01:48:33] *** Goosey has quit IRC[01:48:35] *** vick has quit IRC[01:51:37] *** GinoMan has joined ##OpenGL[01:56:15] *** Gorgoroth has joined ##OpenGL[02:01:16] *** barbar__conan has quit IRC[02:02:04] *** JernejL_ has joined ##OpenGL[02:02:27] *** Rangar has quit IRC[02:03:28] <DGMurdockIII> GLfloat origSlope = (edge.two.y - edge.one.y) / (edge.two.x -edge.one.x); GLflaot perpSlope = -(edge.two.x - edge.one.x) / (edge.two.y -edge.one.y) can any one help me with that[02:04:24] *** dabreegster has left ##OpenGL[02:06:03] *** Xmas| has quit IRC[02:07:01] *** poseidon has quit IRC[02:09:01] *** dvoid_ has quit IRC[02:16:15] *** calav3ra has quit IRC[02:17:39] *** Jernej has quit IRC[02:17:49] *** a-stray-cat` has joined ##OpenGL[02:40:28] *** Spkka has quit IRC[02:46:24] *** johndoe has quit IRC[02:57:46] *** a133x has quit IRC[03:02:55] *** Jernej has joined ##OpenGL[03:17:38] *** JernejL_ has quit IRC[03:17:56] *** b0000 has quit IRC[03:26:12] *** paul424 has joined ##OpenGL[03:28:48] <paul424> Does anyone have problems with display list ? is it possible for opengl to give the same numbers for glGenList[03:29:08] <paul424> s/for/from[03:29:25] *** Gorgoroth has quit IRC[03:36:33] *** cs_student has joined ##OpenGL[03:37:05] *** MatthiasM has quit IRC[03:37:12] *** MatthiasM has joined ##opengl[03:47:33] *** iion has quit IRC[03:58:33] *** v has joined ##OpenGL[04:00:02] *** reprore_ has quit IRC[04:01:43] *** bob_ has joined ##OpenGL[04:02:47] *** JernejL_ has joined ##OpenGL[04:05:04] *** cs_student has quit IRC[04:06:31] *** qeed has quit IRC[04:08:35] *** stringfellow has quit IRC[04:19:15] *** Jernej has quit IRC[04:22:47] *** bob_ has quit IRC[04:24:10] *** bob999 has joined ##OpenGL[04:25:28] *** stevosICBM has joined ##OpenGL[04:25:40] *** bob999 has quit IRC[04:27:06] *** stringfellow has joined ##opengl[04:30:58] *** vade has joined ##OpenGL[04:33:20] *** ata2 has joined ##OpenGL[04:41:02] *** Eforen has quit IRC[04:41:36] *** `Wil has joined ##OpenGL[04:54:50] *** k3t^ has joined ##OpenGL[04:55:00] *** k3t has quit IRC[04:59:23] *** NotWil has quit IRC[04:59:30] *** k3t^ is now known as k3t[05:03:21] *** Jernej has joined ##OpenGL[05:04:49] *** bijoo_osdev has joined ##opengl[05:04:56] *** bijoo_appdev has joined ##OpenGL[05:08:51] *** vade has quit IRC[05:17:51] *** JernejL_ has quit IRC[05:19:44] *** iammisc has joined ##OpenGL[05:24:27] <iammisc> How come my model looks better when I use a face normal on vertices in GL_SMOOTH but I can see triangle outlines in GL_SMOOTH with proper per-vertex normals[05:25:25] *** Aintaer has quit IRC[05:31:20] *** NoLimitz has joined ##OpenGL[05:31:39] <iammisc> nvm, it only looks better for cubes[05:35:31] *** sparky has joined ##OpenGL[05:35:34] <sparky> hey people[05:37:31] <RTFM_FTW> hey sparky[05:38:09] <sparky> hey RT, how's life[05:38:35] <RTFM_FTW> pretty good[05:38:45] <sparky> oooh, big news, my son is scheduled to come out of the belly on friday, C-sectopm[05:38:47] <sparky> C-section[05:38:55] <RTFM_FTW> awesome[05:39:07] <sparky> he hasn't turned so hence the c-section[05:39:33] <sparky> an amnio tomorrow will verify whether or not the lunges are ready for the baby to come out. The doc says she's certain of it though[05:39:42] <sparky> but I could sue their asses off if she were wrong[05:39:47] <sparky> hence the amnio[05:40:44] <RTFM_FTW> yep[05:40:58] <RTFM_FTW> hopefully everything goes A-OK[05:41:19] <sparky> I think it will, my doc also delivered the baby of brook shields :)[05:41:20] <RTFM_FTW> heh then the adventure begins[05:41:30] <sparky> so we're like, almost, famous :)[05:41:33] <sparky> well, maybe not[05:41:36] <sparky> but still good :)[05:42:17] <sparky> oh yeah, and the dude from law and order he he :)[05:42:19] <NoLimitz> hey guys[05:44:14] *** Quentarez has joined ##OpenGL[05:45:19] *** paul424 has quit IRC[05:46:08] *** Aintaer has joined ##OpenGL[05:54:46] *** NoLimitz has quit IRC[05:57:27] *** amz has quit IRC[06:03:08] *** JernejL_ has joined ##OpenGL[06:10:19] *** Kyuuketsuki has joined ##opengl[06:11:38] <Kyuuketsuki> how might i subtract objects? say I want to take this cube I rendered here and hollow a sphere out of it?[06:11:51] <Kyuuketsuki> (hopefully that makes sense)[06:13:51] <HuntsMan> that's called CSG (Constructive Solid Geometry)[06:14:17] <Kyuuketsuki> after a google, yes, that is exactly what i'm looking for :3[06:14:37] <Kyuuketsuki> can this be done in opengl?[06:15:00] <HuntsMan> yes[06:18:51] <sparky> HuntsMan: thanks for clearing that up[06:19:11] <sparky> a very elaborate picture that is[06:19:12] <sparky> :)[06:19:18] *** Jernej has quit IRC[06:19:46] *** jimtendo has joined ##OpenGL[06:21:37] <jimtendo> Hey guys. In terms of 2D rendering, should co-ordinate x=0,y=0 generally be at the center of the screen or at the top left of the screen?[06:23:17] <tmccrary1> its bottom left by default in opengl[06:23:43] <tmccrary1> personally, I find top left most natural[06:24:06] <tmccrary1> opengls way is more like a graph[06:24:09] <Adrinael> It's whereever your projection puts it[06:24:33] <sparky> well, 0,0 would typically be the center[06:25:04] <sparky> at least for typical ogl[06:27:38] <jimtendo> Yeah, I think I may roll sparky's way.[06:27:40] <jimtendo> Thanks guys.[06:27:55] <jimtendo> (Probably easier to co-ordinate with the physics)[06:31:15] <Kyuuketsuki> HuntsMan: have a link for that?[06:32:42] <Kyuuketsuki> i found http://opencsg.org/ but the example doesn't even work[06:33:27] <Kyuuketsuki> so it's kind of difficult to experiment on[06:34:13] *** DGMurdockIII has quit IRC[06:45:10] <Kyuuketsuki> oh well[06:45:12] *** Kyuuketsuki has quit IRC[06:45:28] *** stevosICBM has quit IRC[06:51:05] *** jimtendo has quit IRC[06:53:18] *** vade has joined ##OpenGL[06:57:58] *** v has quit IRC[07:01:41] *** tmccrary has quit IRC[07:03:21] *** Jernej has joined ##OpenGL[07:03:27] *** tmccrary has joined ##OpenGL[07:10:33] *** korff_home has joined ##OpenGL[07:12:36] *** predaeus has joined ##opengl[07:13:04] *** GuShH_ has joined ##OpenGL[07:17:49] *** JernejL_ has quit IRC[07:18:16] *** rutski_ has quit IRC[07:21:19] *** GuShH has quit IRC[07:28:59] *** iammisc has left ##OpenGL[07:32:54] *** qazsxd has joined ##opengl[07:33:17] *** sparky_ has joined ##OpenGL[07:34:19] <qazsxd> Hi guyz..can i discuss something related to EGL here?[07:34:29] <qazsxd> or there is other IRC for EGL topics?[07:34:34] <qazsxd> if any one is aware of...[07:36:14] <rnx> what is it ?[07:36:56] *** twist_ has joined ##OpenGL[07:37:17] <qazsxd> It is an equivanelt of GLX to be used on top of OpenGL-ES[07:38:10] <qazsxd> @rnx: if you aware of what GLX extension is...then i can explain how EGL works/supposed to work[07:38:31] <rnx> i'd guess that's on topic here then[07:39:16] *** Quentarez has quit IRC[07:39:45] <qazsxd> This is to those who knows EGL, because not everyone might be aware of it...[07:40:11] <qazsxd> Can any one pls tell me how can i render my content from a EGLPixmap/EGLPbuffer to the screen?[07:40:16] <qazsxd> without using EGLwindow surface?[07:44:24] *** sparky has quit IRC[07:52:47] *** Rangar has joined ##OpenGL[07:52:55] *** A2intaer has joined ##OpenGL[07:53:06] *** sparky_ is now known as sparky[07:59:55] <qazsxd> no EGL expert here?[08:00:03] *** Jernej has quit IRC[08:02:26] <exDM69> qazsxd: seems not[08:02:36] <exDM69> I am intrested about EGL, tho[08:02:42] *** Jernej has joined ##OpenGL[08:06:44] <qazsxd> hmmmmm...:([08:09:23] *** Aintaer has quit IRC[08:09:38] *** twist_ has quit IRC[08:24:15] *** zommi has joined ##OpenGL[08:31:39] *** kbotnen_ has joined ##OpenGL[08:33:57] *** NotWil has joined ##OpenGL[08:37:20] *** kbotnen_ has quit IRC[08:39:58] *** scai 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*** rabbit- has joined ##OpenGL[09:45:27] *** `Wil has joined ##OpenGL[09:46:50] *** Ademan has quit IRC[09:57:50] *** kbotnen has quit IRC[09:59:24] *** hibread__ has quit IRC[09:59:24] *** NinZine has quit IRC[09:59:24] *** braden has quit IRC[09:59:25] *** turbo24prg has quit IRC[09:59:25] *** |chiz| has quit IRC[09:59:37] *** turbo24prg has joined ##OpenGL[09:59:37] *** |chiz| has joined ##OpenGL[09:59:49] *** hibread__ has joined ##opengl[10:00:06] *** NinZine has joined ##OpenGL[10:00:11] *** braden has joined ##OpenGL[10:02:31] *** NotWil has quit IRC[10:06:56] *** GuShH_ has quit IRC[10:06:56] *** dvoid_ has quit IRC[10:11:44] *** Jernej has joined ##OpenGL[10:13:20] *** Burga has joined ##OpenGL[10:14:10] *** Rangar has quit IRC[10:15:44] *** dizekat has left ##OpenGL[10:17:29] *** hogbog has joined ##opengl[10:17:42] *** boghog has quit IRC[10:18:27] *** hogbog is now known as boghog[10:22:36] *** Nescafe has joined ##OpenGL[10:26:02] *** qazsxd has left ##opengl[10:28:48] *** JernejL_ has quit IRC[10:29:00] *** JernejL_ has joined ##OpenGL[10:35:28] *** Walt has quit IRC[10:36:03] *** Wikian has joined ##OpenGL[10:36:15] *** Wikian has quit IRC[10:37:18] *** Acryler has joined ##OpenGL[10:40:10] *** dv_ has quit IRC[10:41:55] *** rnx has quit IRC[10:43:21] *** kbotnen has joined ##OpenGL[10:45:26] *** Jernej has quit IRC[10:51:05] *** eXtronuS_ has joined ##OpenGL[10:57:33] *** sohail has quit IRC[10:58:38] *** Gorgoroth has joined ##OpenGL[11:02:46] *** rabbit- has quit IRC[11:08:54] *** Madsy has joined ##OpenGL[11:10:07] *** benoit_ has joined ##OpenGL[11:10:30] *** benoit_ is now known as Guest9609[11:12:05] *** belou has quit IRC[11:17:58] *** Guest9609 is now known as belou[11:22:46] *** Ingenu has joined ##OpenGL[11:29:40] *** Jernej has joined ##OpenGL[11:33:48] *** batbrat has joined ##opengl[11:35:24] <batbrat> Hi everybody. I dropped out of this channel suddenly a week back, thanks to a headache, in the middle of a lesson from sparky.[11:36:42] <batbrat> I have since been unable to sit in front of my computer. Each time I did, I got a bad headache, saw double had a headache... This is my first time in front of a computer since then.[11:37:43] <batbrat> I just dropped by to apologise for not coming back the next day for learning the rest of the lesson.I am not back to full health yet, so I can't stay long now.[11:38:35] <batbrat> Once again, thanks to everybody on this forum, and sorry I didn't make it on time. I hope I can learn the rest once I recover. :)[11:39:29] *** Rangar has joined ##OpenGL[11:42:41] <quicksilver> :)[11:42:47] <quicksilver> good luck with your headache.[11:42:52] <quicksilver> drink lots of water and get plenty of rest.[11:43:15] *** PsiOmegaDelta has joined ##OpenGL[11:43:55] <batbrat> quicksilver: Thanks for your kind words.[11:44:07] <batbrat> quicksilver: I'll get rest and water :)[11:45:22] *** JernejL_ has quit IRC[11:45:27] <Plagman> <batbrat> I have since been unable to sit in front of my computer. Each time I did, I got a bad headache, saw double had a headache... This is my first time in front of a computer since then.[11:45:32] <Plagman> sparky will do that to you[11:45:52] <Plagman> honestly he bores me to death too[11:45:53] *** UUncia has quit IRC[11:49:25] <batbrat> Plagman: Thats funny. Still this wasn't sparky. It was all me. I have to go to a Doc on Feb15 to see if its my eyes. Thanks Plagman :)[11:51:03] <batbrat> Plagman: I was glad to learn from sparky. I appreciate all the help I get. I have conversed with sparky just the once though.[11:52:26] *** PsiOmega has quit IRC[11:56:12] *** UUncia has joined ##OpenGL[11:57:02] <batbrat> Ok. Bye everybody. I am going to go rest now. Great talking to you all. See you all as soon as I recover.[11:57:08] *** batbrat has left ##opengl[12:00:41] *** bijoo_appdev has quit IRC[12:00:41] *** bijoo_osdev has quit IRC[12:23:19] *** UUncia has quit IRC[12:23:51] *** litb has joined ##opengl[12:23:56] <litb> hi all :)[12:24:02] <litb> im in teh opengl class currently :)[12:27:16] *** UUncia has joined ##OpenGL[12:30:32] *** JernejL_ has joined ##OpenGL[12:31:14] *** sohail has joined ##OpenGL[12:32:21] *** LtJax has joined ##opengl[12:36:04] *** scai has joined ##opengl[12:39:18] *** johndoe has joined ##opengl[12:45:15] *** Jernej has quit IRC[12:49:18] *** Suprano has joined ##OpenGL[12:56:15] *** litb has quit IRC[13:01:40] *** HuntsMan has quit IRC[13:05:20] *** sparky_ has joined ##OpenGL[13:05:57] *** jcazevedo has joined ##OpenGL[13:07:34] *** sparky has quit IRC[13:23:02] *** pietia has joined ##OpenGL[13:29:57] *** Jernej has joined ##OpenGL[13:33:25] *** NotWil has joined ##OpenGL[13:35:26] *** LtJax has quit IRC[13:38:16] *** pietia_ has 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IRC[14:45:00] *** scai has left ##opengl[14:45:20] *** Jernej has quit IRC[14:50:43] *** sparky has joined ##OpenGL[14:58:48] *** bstock has joined ##OpenGL[15:02:52] *** sparky_ has quit IRC[15:04:29] *** UUncia has quit IRC[15:06:18] *** doub has joined ##opengl[15:07:37] *** calav3ra__ has quit IRC[15:09:44] *** calav3ra has joined ##opengl[15:14:22] *** pietia has quit IRC[15:16:53] *** calav3ra_ has joined ##opengl[15:27:18] <sparky> good morning guys[15:28:34] <boghog> hello[15:29:53] *** Den_Des has joined ##OpenGL[15:33:20] *** ol1veira1 has quit IRC[15:33:42] *** Den_Des has quit IRC[15:35:19] *** calav3ra has quit IRC[15:40:11] <belou> hello ![15:44:16] *** Gonzo has joined ##OpenGL[15:48:07] *** ol1veira_ has joined ##OpenGL[15:52:25] *** DrGonzo has quit IRC[15:54:29] *** dvoid_ has joined ##OpenGL[16:04:06] *** calav3ra_ has quit IRC[16:05:11] *** groton has quit IRC[16:06:32] *** calav3ra has joined ##opengl[16:11:12] *** groton has joined ##OpenGL[16:26:26] *** ata2 has quit IRC[16:30:48] *** pwned has quit IRC[16:30:55] *** pwned_ has joined ##opengl[16:32:40] *** LordMetroid has quit IRC[16:32:52] *** BenPa85 has joined ##opengl[16:42:52] *** djork has joined ##opengl[16:43:21] *** LtJax has joined ##opengl[16:43:45] *** pwned has joined ##opengl[16:46:50] *** scai has joined ##opengl[16:50:14] *** pwned_ has quit IRC[16:53:25] *** cplusplus has quit IRC[16:54:43] *** BenPa86 has joined ##opengl[16:55:21] *** MatthiasM has quit IRC[16:55:27] *** MatthiasM has joined ##opengl[16:55:40] *** druggy_ has joined ##opengl[16:56:45] *** itewsh has joined ##OpenGL[17:07:51] *** BenPa85 has quit IRC[17:08:06] *** Acry_ler has joined ##OpenGL[17:08:49] *** itouch has joined ##OpenGL[17:09:35] *** Acryler has quit IRC[17:12:35] *** druggy has quit IRC[17:12:57] *** wisey has joined ##OpenGL[17:13:13] *** djork has quit IRC[17:17:24] *** Yustme has joined ##OpenGL[17:17:46] *** Goosey has joined ##OpenGL[17:18:05] *** AlastairLynn has joined ##opengl[17:21:10] *** itewsh has quit IRC[17:22:17] *** reprore has joined ##OpenGL[17:23:42] *** `Wil has joined ##OpenGL[17:25:15] *** belou has quit IRC[17:28:32] *** GuShH has joined ##OpenGL[17:35:19] *** doub has quit IRC[17:36:40] *** LordMetroid has joined ##OpenGL[17:37:56] *** LordMetroid has quit IRC[17:38:11] *** LordMetroid has joined ##OpenGL[17:40:48] *** NotWil has quit IRC[17:56:11] *** KU0N has joined ##opengl[17:56:59] *** [AD]Turbo has quit IRC[17:59:04] *** elite01 has joined ##opengl[18:07:08] *** BenPa86 has quit IRC[18:08:42] *** matrium- has joined ##OpenGL[18:09:06] <matrium-> hi[18:10:29] <matrium-> I'm trying to debug my shader with glslDevil, but my variables values are just "?" while stepping through the shader program[18:17:31] *** GuShH has quit IRC[18:24:24] *** Renderwahn has joined ##OpenGL[18:30:36] *** Jernej has joined ##OpenGL[18:37:27] *** GX has joined ##OpenGL[18:38:36] *** Nescafe has quit IRC[18:39:07] *** djork has joined ##opengl[18:39:35] *** zommi has quit IRC[18:40:03] *** Viko2 has joined ##OpenGL[18:42:24] *** TheLorax has joined ##opengl[18:42:32] *** monkey_d_luffy has quit IRC[18:42:47] *** monkey_d_luffy has joined ##OpenGL[18:42:57] <TheLorax> do I need to call glEnableClientState at each render call or is it a global enable for the whole context?[18:44:57] *** vade has quit IRC[18:45:10] <matrium-> it's enabled until you call glDisableClientState[18:45:36] *** JernejL_ has quit IRC[18:46:00] <TheLorax> thanks[18:47:11] *** bijoo_osdev has joined ##opengl[18:47:11] *** bijoo_appdev has joined ##OpenGL[18:47:36] *** HumpingSpider has joined ##OpenGL[18:49:09] *** Viko2 has quit IRC[18:52:44] *** TheLorax has quit IRC[18:55:16] *** JernejL_ has joined ##OpenGL[19:03:32] *** mm765 is now known as mm765^away[19:05:03] *** XT95_ has joined ##OpenGL[19:06:02] *** Bollinger has quit IRC[19:07:16] *** wisey has quit IRC[19:11:07] *** Jernej has quit IRC[19:14:38] *** maxton has quit IRC[19:14:56] *** Jernej has joined ##OpenGL[19:16:34] *** wisey has joined ##OpenGL[19:16:49] *** xkpe has joined ##OpenGL[19:17:42] <xkpe> hello[19:17:52] *** Walt has joined ##opengl[19:17:56] *** braden has quit IRC[19:20:24] *** wey has joined ##opengl[19:20:55] *** pietia has joined ##OpenGL[19:21:50] <xkpe> im trying to copy the front buffer to the back buffer, the code has worked before, but not its not working im not sure if i missed something, can anyone take a look please? (its just 6 lines) http://cpp.ninjacodemonkeys.org/5035[19:21:55] *** Jernej has quit IRC[19:21:56] *** Bollinger has joined ##OpenGL[19:22:00] *** JernejL has joined ##OpenGL[19:22:36] <MatthiasM> xkpe: why are you doing that ?[19:23:04] *** reprore has quit IRC[19:24:37] *** mm765^away is now known as mm765[19:24:51] *** twist_ has joined ##OpenGL[19:24:56] <xkpe> sometimes i want to render realtime so i have double buffering but sometimes i only want to draw a cross on the cursor position so i use color mode xor do draw the cursor and draw/erase it drawing over it, but i still swap the buffers, so i need to copy the front buffer to the back buffer[19:26:45] <xkpe> i also may want to draw more complex things on xor mode so i'd rather do it on the back buffer and then swap[19:27:52] <MatthiasM> the front buffer may not contain any pixels at all when another window overlaps it[19:28:04] <MatthiasM> or if it's outside the screen - same for the backbuffer[19:28:20] <MatthiasM> if you want to do such things - render to front buffer without copying[19:28:24] *** steve918 has joined ##OpenGL[19:28:39] <MatthiasM> or keep your image in an offscreen buffer (eg FBO, pbuffer)[19:28:53] *** vade has joined ##OpenGL[19:29:27] *** JernejL_ has quit IRC[19:29:47] <xkpe> i am aware of the overlap problem[19:30:14] <xkpe> still i'd like to copy the back buffer to the front buffer, that code i posted was working before, is it missing something?[19:30:34] <xkpe> i thought that should work[19:31:50] *** a-stray-cat` has quit IRC[19:37:28] *** cplusplus has joined ##OpenGL[19:38:56] *** e_roder has joined ##OpenGL[19:39:00] <e_roder> hey[19:39:15] <e_roder> is it possible to combine opengl vertex transforms with vertex shader transforms?[19:39:50] <Ingenu> obviously not[19:39:56] <e_roder> i'd like to do model tranformation in opengl and then do world and projection transformations in the shader[19:40:16] <Ingenu> do everything in the shader[19:40:24] <Ingenu> it's only a matrix multiply anyway[19:40:27] <Ingenu> should be trivial[19:40:50] *** HuntsMan has joined ##opengl[19:41:01] <tmccrary> in a way you already do that with shaders (or there are builtins to accomplish this)[19:41:12] <e_roder> right[19:41:15] <e_roder> mul(x,y)[19:41:26] <tmccrary> you setup the modelview, which is then available as a builtin in the vertex shader[19:41:40] *** druggy_ has quit IRC[19:41:43] *** druggy has joined ##opengl[19:41:44] *** KU0N has quit IRC[19:42:11] <e_roder> set up the modelview?[19:43:09] <tmccrary> applying your models transform matrix to opengl's modelview matrix[19:43:24] <tmccrary> glMultMatrixf, etc[19:44:00] <e_roder> i guess i don't understand what you're suggesting[19:44:01] <e_roder> sorry[19:44:25] <e_roder> i don't understand the purpose nor the method[19:44:26] <tmccrary> You should probably read the red book[19:44:33] <tmccrary> its like the first thing you learn with opengl[19:45:08] <tmccrary> http://www.glprogramming.com/red/chapter03.html[19:45:56] <tmccrary> Alternatively, you could just supply your transform matrix to the shader via a uniform[19:46:09] <tmccrary> I doubt there's any real advantages in doing so though[19:46:09] <e_roder> that's my intention[19:46:35] <tmccrary> keep in mind, with shaders ALL your transforms are done in the shader[19:46:35] <e_roder> letting the gpu do the work?[19:46:42] <tmccrary> your geometry should be in its own local space[19:47:14] *** lewymati has joined ##OpenGL[19:51:37] *** TheLorax has joined ##opengl[19:54:23] <TheLorax> I'm getting an exception from gl.glVertexPointer..."array vertex_buffer_object must be enabled to call this method"[19:54:30] <TheLorax> anybody have experience with jogl?[19:54:45] <TheLorax> there are 2 google search results for this.[19:56:12] *** rnx has joined ##opengl[19:57:13] <tmccrary> did make a glEnableClientState call before hand?[19:57:20] <tmccrary> for GL_VERTEX_ARRAY[19:57:54] *** fusi has joined ##opengl[19:59:34] *** itouch has quit IRC[20:00:01] <TheLorax> tmccrary, yeah[20:01:35] *** a-stray-cat has joined ##OpenGL[20:01:40] <tmccrary> Maybe check to make sure it got bound properly when you called glBindBuffer[20:03:35] <TheLorax> tmccrary, err, weith gl get error?[20:03:51] *** boghog has quit IRC[20:03:52] *** fargiolas has joined ##OpenGL[20:04:33] *** LrdMtrod has joined ##OpenGL[20:05:42] <TheLorax> well, glGetError = GL_NO_ERRORS.[20:05:46] *** chai has joined ##OpenGL[20:05:52] <TheLorax> I'm pretty sure it's a jogl thing.[20:06:10] *** johndoevodka has quit IRC[20:06:20] <tmccrary> It sounds like its trying to help prevent a crash[20:06:29] <tmccrary> like a hard crash[20:06:30] *** e_roder has quit IRC[20:06:58] *** boghog has joined ##opengl[20:07:03] <chai> aright meganoob here, bear with me, can anyone help me compile a simple opengl/glut sample?[20:07:08] <TheLorax> I think the vbo extension is maybe not correctly initalized.[20:07:18] <TheLorax> chai, sure, post errors.[20:08:13] <chai> ok so i copied the first sample from http://mindfuck.de-brauwer.be/articles/glut/[20:08:26] <MatthiasM> TheLorax: LWJGL does the same - but it does not check client state enables - it just checks if a VBO is bound when calling this function[20:08:48] <chai> and compiled using the same line the site shows[20:08:49] *** LordMetroid has quit IRC[20:09:03] <chai> but still get all the gl functions as undefined errors[20:09:40] <chai> oh wait here it is GL/glut.h no such directory[20:09:50] <chai> but i definitely have glut[20:09:56] <MatthiasM> chai: install freeglut-dev package[20:10:49] <TheLorax> chai, linux right?[20:11:00] <chai> hah ok didn't have -dev package, thanks it works fine now[20:11:12] <TheLorax> brb....\[20:11:14] *** TheLorax has quit IRC[20:11:21] *** vampirefrog has joined ##OpenGL[20:11:43] *** vampirefrog has quit IRC[20:12:24] *** vampirefrog has joined ##OpenGL[20:15:10] *** steve918 has quit IRC[20:16:17] *** TheLorax has joined ##opengl[20:18:01] *** vampirefrog has quit IRC[20:25:13] *** LordMetroid has joined ##OpenGL[20:25:14] *** rnx has quit IRC[20:25:23] *** LrdMtrod has quit IRC[20:26:39] *** rnx has joined ##opengl[20:27:59] *** stringfellow has quit IRC[20:29:29] *** mm765 is now known as mm765^away[20:32:01] *** predaeus has quit IRC[20:32:51] <xkpe> MatthiasM, i solved my problem, i had the view matrix wrong when i was trying to copy, its working now[20:32:56] <xkpe> thanks for the help[20:33:12] <xkpe> and the sugestions[20:34:55] *** johndoe has joined ##opengl[20:40:17] *** LtJax has quit IRC[20:42:36] *** Spkka has joined ##OpenGL[20:42:51] *** Spkka has joined ##OpenGL[20:44:22] *** mattn2|home has joined ##OpenGL[20:53:37] *** Ingenu has quit IRC[20:54:57] *** Ingenu has joined ##OpenGL[20:55:10] *** msh07 has joined ##OpenGL[20:59:06] *** LtJax has joined ##opengl[21:01:49] *** xkpe has quit IRC[21:01:50] *** tmccrary has quit IRC[21:02:38] *** Rolenun has joined ##opengl[21:02:52] *** rorokimdim___ has joined ##opengl[21:03:28] *** rorokimdim___ has quit IRC[21:07:57] *** cplusplus2 has joined ##OpenGL[21:10:02] *** LtJax has quit IRC[21:11:39] *** davidc__ has quit IRC[21:12:51] *** kbotnen has quit IRC[21:13:47] *** lewymati has quit IRC[21:14:28] *** tmccrary has joined ##OpenGL[21:16:13] *** dfletcher has joined ##OpenGL[21:18:30] <dfletcher> hi so I made this fun media player UI http://i44.tinypic.com/2z8vrz6.jpg, http://i39.tinypic.com/15hkaw8.jpg[21:18:46] <dfletcher> it does most of the thumb loading in a separate thread, but I found I needed to call glTexImage2d in the main thread[21:18:50] <dfletcher> which is painfully slow[21:19:17] <dfletcher> anyone have ideas how to load the thumbs and keep everything smooth? is preloading them the only option?[21:19:32] <MatthiasM> ^PBO[21:19:44] *** pietia has quit IRC[21:22:52] <dfletcher> lead oxide?[21:23:06] <exDM69> dfletcher: pixel buffer object[21:23:19] <dfletcher> aha I didn't think that made sense ;)[21:23:20] <exDM69> you can set up asynchronous texture transfer[21:23:26] <dfletcher> aha![21:24:42] <dfletcher> oh I see, an extension[21:24:49] <exDM69> so first create a pbo (allocate memory from gpu), then memory map the buffer and write data to mapped pointer, unmap, bind the buffer and call glTexImage with data = NULL[21:25:31] <dfletcher> sounds good, I think though I'll detect if the extension exists, revert to what I do now if not there[21:25:51] *** cplusplus has quit IRC[21:26:36] <exDM69> that extension should exist on pretty much every half-modern gpu with decent drivers[21:26:46] *** druggy has quit IRC[21:26:58] <dfletcher> excellent, my main target is nvidia, thanks![21:27:31] <exDM69> even nvidia riva tnt should support that :)[21:35:56] *** maxton has joined ##OpenGL[21:36:34] *** NotWil has joined ##OpenGL[21:42:10] *** msh07 has quit IRC[21:42:34] *** matrium- has quit IRC[21:47:14] *** davidc__ has joined ##opengl[21:49:56] *** druggy has joined ##opengl[21:54:20] *** `Wil has quit IRC[21:56:07] *** TheLorax has quit IRC[21:59:35] *** RTFM_FTW has quit IRC[21:59:35] <A2intaer> small plane just crashed into the hudson river[21:59:41] *** A2intaer is now known as Aintaer[22:01:08] *** RTFM_FTW has joined ##OpenGL[22:01:14] *** mattn2|home has quit IRC[22:05:37] <tmccrary> It was a bird attack[22:05:51] <tmccrary> even the birds have become terrorists[22:20:22] *** b0000 has joined ##opengl[22:21:46] *** Renderwahn has quit IRC[22:31:22] *** m4ggus has joined ##opengl[22:32:25] *** jmd has joined ##OpenGL[22:36:30] *** qeed has joined ##opengl[22:37:43] *** pietia has joined ##OpenGL[22:52:46] *** Kasu has joined ##OpenGL[22:55:21] *** mm765^away is now known as mm765[22:59:29] *** sparky has quit IRC[22:59:31] *** wisey has quit IRC[23:01:39] *** sparky has joined ##OpenGL[23:03:15] *** Yustme has quit IRC[23:04:45] *** itsmonktastic has joined ##opengl[23:05:42] *** itsmonkt1stic has quit IRC[23:07:55] *** hansi_ has joined ##OpenGL[23:08:29] <jmd> On a certain display, glAccum fails in my app.[23:08:40] *** scai has left ##opengl[23:08:44] *** stringfellow has joined ##opengl[23:08:50] *** wey has quit IRC[23:08:50] <MatthiasM> jmd: use FBO[23:09:04] *** x0rx0r has joined ##OpenGL[23:09:05] <jmd> It fails with GL_INVALID_OPERATION[23:09:33] <jmd> according to the red book, this can only happen if there is no accumulation buffer, or if executed between Begin/End.[23:10:03] <MatthiasM> jmd: glGet[23:10:30] <HuntsMan> probably there's no accum buffer[23:12:00] *** cplusplus2 has quit IRC[23:13:17] *** HuntsMan has quit IRC[23:16:02] <jmd> HuntsMan, That's what I suspected, but gdk_gl_config_has_accum_buffer returns true.[23:16:18] <jmd> MatthiasM, What parameter should I get?[23:16:33] <MatthiasM> jmd: information about your accum buffer[23:17:50] *** sparky_ has joined ##OpenGL[23:18:00] *** groton has quit IRC[23:18:13] *** Walt has quit IRC[23:20:28] *** cplusplus has joined ##OpenGL[23:23:41] *** NevroPus has quit IRC[23:24:25] *** twist_ has quit IRC[23:26:06] *** sparky has quit IRC[23:27:12] <jmd> All bitplanes have a depth of zero![23:28:43] <MatthiasM> then you don't have accu[23:29:03] *** XT95_ has quit IRC[23:30:24] <jmd> gdk_gl_config_has_accum_buffer is lying then.[23:31:20] *** ol1veira_ has quit IRC[23:32:05] *** Ingenu has quit IRC[23:39:06] *** Acry_ler has quit IRC[23:40:09] <dfletcher> gdk is full of lies!! use SDL ;)[23:50:18] *** GX has quit IRC[23:52:43] *** johndoe has quit IRC[23:59:53] *** Spkka has quit IRC