November 16, 2014 
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November 16, 2014 [00:04:03] *** WorldGenesis has quit IRC[00:04:46] *** Guest46818 has quit IRC[00:04:46] *** Guest46818 has joined ##OpenGL[00:04:53] *** Guest46818 is now known as nitrix[00:05:41] *** erhan_ has quit IRC[00:13:30] *** jayne_ is now known as jayne[00:18:02] *** Waynes1 has quit IRC[00:18:15] *** DolphinDream has joined ##OpenGL[00:19:44] *** ablepharus has quit IRC[00:22:06] *** damir__ has quit IRC[00:25:05] *** Involuntary is now known as Jeanne-Kamikaze[00:26:12] *** drag0nius_ has quit IRC[00:30:38] *** Kane has quit IRC[00:32:49] *** XCVB has quit IRC[00:34:04] *** groton has quit IRC[00:40:56] *** CainJacobi has quit IRC[00:45:01] *** CainJacobi has joined ##OpenGL[00:52:57] *** Biliogadafr1 has quit IRC[00:54:37] *** Jeanne-Kamikaze has quit IRC[00:54:56] *** asido has quit IRC[00:59:37] *** robot-beethoven has joined ##OpenGL[01:09:13] *** Keniyal has quit IRC[01:09:50] *** Keniyal has joined ##OpenGL[01:12:18] *** DapperPixpy has joined ##OpenGL[01:23:58] <japro> so i keep being unsure about when i need to set draw buffers or don't[01:24:39] <japro> like do i technically need to change draw buffers between GL_COLOR_ATTACHMENTN and GL_BACK_LEFT etc? when switching between custom fbos and the default 0 fbo?[01:25:01] <japro> it seems just setting to color attachments "works"[01:27:25] *** b4b has quit IRC[01:28:17] <derhass_> japro: the draw-buffers are per-fbo state[01:28:26] <derhass_> including fbo 0[01:29:24] *** pizthewiz has quit IRC[01:31:23] <japro> that makes sense i guess :)[01:32:21] *** void256 has quit IRC[01:35:42] <newguise1234> for gldrawelementsinstanced, the vertexcoord attrib should have a divisor of 0? and it should just step through your associated array_element_buffer like usual, and go back to the beginning at the beginning of each instance?[01:36:00] <newguise1234> sorry for the how muddled it is.[01:37:54] <japro> pretty much[01:38:35] <newguise1234> not gonna ask anyone to look through my code, but I get segfaults whenever I try to use a new Draw call lol TT___TT[01:40:05] *** tcsc has joined ##OpenGL[01:45:01] *** AlexRussia has quit IRC[01:45:49] *** AlexRussia_ has joined ##OpenGL[01:46:40] <japro> hmm, is there a way to clear different attachments to different values?[01:47:02] <newguise1234> how so?[01:47:56] *** b4b has joined ##OpenGL[01:48:20] <Hunts> japro: glClearBuffer[01:49:35] <slime> (or use glDrawBuffer + glClear)[01:52:46] *** tm604 has quit IRC[01:54:02] *** tm604 has joined ##OpenGL[01:57:40] <newguise1234> is this interpretation correct?[01:57:42] <newguise1234> http://pastebin.com/vHbVxBPm[01:57:54] <newguise1234> it should draw one single triangle[01:59:33] *** tcsc has quit IRC[02:04:55] *** charlie5 has joined ##OpenGL[02:06:40] *** BreadProduct has quit IRC[02:07:48] *** Lemml has quit IRC[02:09:50] *** pizthewiz has joined ##OpenGL[02:16:00] *** pizthewiz has quit IRC[02:16:37] *** Zupo3 has quit IRC[02:24:10] *** pizthewiz has joined ##OpenGL[02:27:48] *** alhsekufahlsief has left ##OpenGL[02:29:56] *** DolphinDream has quit IRC[02:31:44] *** timsche has quit IRC[02:36:50] *** foreignFunction has quit IRC[02:36:52] *** pizthewiz has quit IRC[02:41:57] *** Ad1 has quit IRC[02:43:01] *** luxigo has joined ##OpenGL[02:43:40] *** DolphinDream has joined ##OpenGL[02:43:47] *** CamonZ has quit IRC[02:49:22] *** iKlsR has joined ##OpenGL[02:49:36] *** ninzine has quit IRC[02:49:53] *** luxigo has quit IRC[02:51:08] *** ninzine has joined ##OpenGL[02:57:13] *** pizthewiz has joined ##OpenGL[02:57:50] *** ninzine has quit IRC[03:03:04] <newguise1234> well, it seems I may have some misunderstanding still. After I unbind my VAO, I unbind my ELEMENT_ARRAY_BUFFER.[03:03:12] *** Garner has quit IRC[03:03:23] *** unreal_ is now known as unreal[03:03:29] <newguise1234> When I bind my VAO again, I get a segfault upon a draw call unless I've seperately bound the ELEMENT_ARRAY_BUFFER as well[03:03:46] <newguise1234> I thought the binding the vao bound the ELEMENT_ARRAY_BUFFER?[03:03:50] <derhass_> it does[03:04:39] *** ninzine has joined ##OpenGL[03:05:53] <newguise1234> and thats the experience I had before, I guess I've a problem in my code hidden away somewhere[03:06:47] *** luxigo has joined ##OpenGL[03:13:06] *** Misu has quit IRC[03:15:39] *** hexagoxel has quit IRC[03:17:18] *** bkre_ has quit IRC[03:19:02] *** centrinia has joined ##OpenGL[03:26:08] *** edwardjohn has joined ##OpenGL[03:30:15] <edwardjohn> I have a FBO to which I’m only rendering depths. I’ve got an issue where the FBO isn’t being cleared properly when the window size is smaller than the FBO. I’m setting my viewport to the buffer size after binding it and before clearing but I can’t seem to resolve this.[03:31:39] <derhass_> the clear does not even care about the viewport[03:31:55] <derhass_> the only way to restrict the area affected by glClear whould be the scissor test[03:32:25] <XMPPwocky> yeah it's just scissorting[03:32:30] <XMPPwocky> and what is "not properly"[03:32:39] <XMPPwocky> the exact behavior is important[03:33:16] <derhass_> I get the hunch that the fbo is not the issue at all, but the final rendering to the real frambuffer[03:33:33] <edwardjohn> Yes, so I thought it might be scissor test and I set that to the buffer size also but it didn’t resolve the issue.[03:36:22] *** Lucretia has quit IRC[03:36:25] <edwardjohn> I’m using the FBO for shadow rendering. I’m using a sampler2DShadow in my lighting fragment shader to check the relative depths. In the test case I render nothing to the fbo (just initialise and clear it) and just compare to 1 which should always return 1.[03:37:08] <XMPPwocky> what version of gl[03:37:17] <edwardjohn> I then render the result to the colour buffer (as a way of debugging). I can see a clear region that is white (as expected) that increases and decreases as I changed the window size relative to the buffer size.[03:37:33] <edwardjohn> 3.2, using LWJGL and java (if that helps)[03:38:00] *** Lucretia has joined ##OpenGL[03:38:46] <derhass_> edwardjohn: that is prpbably just because you acess the texture at the wrong places[03:39:28] *** pizthewiz has quit IRC[03:40:08] <edwardjohn> I’ve verified my map coordinates and they all see to be correct. I will reverify if you feel that’s the issue.[03:41:05] <derhass_> well, I don't know for sure[03:43:12] <edwardjohn> To check my coordinates into the map I force anything that is outside 0-1 as 0 on the red chanel for x and the green channel for y. the value for z is the result of the texture lookup on the map for those coordinates.[03:45:01] <edwardjohn> I’m not sure if that was clear, but I’m fairly certian that my coordinates are correct.[03:45:16] *** luxigo has quit IRC[03:48:56] *** HuntsMan2 has joined ##OpenGL[03:49:11] <edwardjohn> derhass_, either way, one thing I can be sure of is that the window size is having an impact on the effect I’m observing.[03:50:35] <derhass_> yeah[03:50:45] <derhass_> and there are many possible candidates for that[03:51:01] <derhass_> the projection matrices being one of them[03:52:52] *** Hunts has quit IRC[03:52:59] <edwardjohn> So, in my vertex shaders I’m passing all DCMs in as uniforms. I don’t set GL_projection or anything … Don’t know if that helps.[03:54:51] <derhass_> well. it is not about GL_PROJECTION, but about the projection matrix[03:54:59] <derhass_> you probably use one[03:55:08] <derhass_> or maybe not. who knows?[03:56:39] <edwardjohn> Yes, I do. Well several to be more correct. In this instance I’m sing a projection matric of the light to the taget for which I want to generate shadows and then another for the view from the eye/camera.[03:57:53] *** BitPuffin has quit IRC[03:58:26] <edwardjohn> And, I can verify that, as far as I can tell they are working as one would expect. I should add that so long as the buffersize is less than the window size my shadow rendering works just fine.[04:00:01] <edwardjohn> However, when the window is smaller (attempting to render shadows that stretch over large areas with a reasonable resoloution) then only part of the shadow map gets populated with depth properly, proportionally effectd by the difference between window and buffer size.[04:00:35] *** iKlsR has quit IRC[04:11:02] *** DolphinDream has quit IRC[04:12:03] <edwardjohn> derhass_, assuming it’s not the projection matrices either, what would be your next suggestion please.[04:12:28] <derhass_> i've no idea[04:12:41] <derhass_> that kind of guesswork is not really getting us anywhere[04:12:53] <derhass_> and I'm to tired anyway[04:12:58] <derhass_> it's 4:12 am here[04:15:13] <edwardjohn> 03:14 am here. Well, I appriciate you suggesting areas to look - as I’ve been debuggin for a while and am lost as to where my issue might be coming from. So while I understand and agree with you, if you do think of anything I’d appriciate it ^^[04:18:23] *** pragma- has quit IRC[04:24:06] *** DolphinDream has joined ##OpenGL[04:26:13] *** Codex_ has joined ##OpenGL[04:26:52] *** pizthewiz has joined ##OpenGL[04:28:03] *** Hadrien has joined ##OpenGL[04:33:10] *** pragma- has joined ##OpenGL[04:34:08] *** ragecryx has quit IRC[04:37:28] *** Cabanossi has quit IRC[04:39:04] *** Cabanossi has joined ##OpenGL[04:43:34] *** Crehl has quit IRC[04:47:48] *** Orion] has quit IRC[04:55:12] *** samrat has joined ##OpenGL[05:01:02] *** DapperPixpy has quit IRC[05:03:01] *** Hadrien has quit IRC[05:04:17] *** hahuang61 has quit IRC[05:06:28] *** konom has joined ##OpenGL[05:09:11] *** hahuang61 has joined ##OpenGL[05:14:47] *** plasticle has joined ##OpenGL[05:15:13] *** plasticle has quit IRC[05:16:57] *** urraka has quit IRC[05:17:08] *** lenarhoyt has quit IRC[05:17:21] *** pizthewiz has quit IRC[05:17:25] *** plasticle has joined ##OpenGL[05:18:01] *** plasticle has quit IRC[05:20:07] *** shingshang has joined ##OpenGL[05:23:16] *** pizthewiz has joined ##OpenGL[05:29:02] *** zajfy has joined ##OpenGL[05:36:46] *** edwardjohn has quit IRC[05:44:53] *** RyanPridgeon has quit IRC[05:45:03] *** seangrov` has quit IRC[06:02:45] *** Bigpet_ has quit IRC[06:03:33] *** pizthewiz has quit IRC[06:06:22] *** delicado has joined ##OpenGL[06:12:55] <delicado> does opengl support uploading textures in "chunks"? i have an engine where everything is pooled, maximum pool block is ~1MB and so some textures larger than this are written into multiple blocks and are always not contiguous in memory.[06:13:51] <Codex_> cant you collect the chunks together before passing to opengl?[06:14:18] *** bb010g has joined ##OpenGL[06:17:21] <slime> you can use glTexSubImage (after allocating the texture with glTexImage + a null pointer, or glTexStorage)[06:17:42] <slime> also that sounds like an odd design[06:18:16] <delicado> yes i can allocate larger a buffer then write the chunks into it so it will be contiguous, but that would defeat my purpose of pooling, and thats another allocation+write+free operation[06:22:28] *** delicado has quit IRC[06:27:54] *** BreadProduct has joined ##OpenGL[06:28:54] *** BreadProduct_ has joined ##OpenGL[06:29:06] *** delicado has joined ##OpenGL[06:31:33] <delicado> fragmentation was my main issue before i did pooling, the engine is an streaming engine, like all streaming engine resources are being loaded and unloaded a lot. thanks glTextSubImage is what i need[06:31:50] *** b4b has quit IRC[06:32:39] *** BreadProduct has quit IRC[06:32:42] *** BreadProduct_ is now known as BreadProduct[06:32:48] *** SleekoNiko has quit IRC[06:50:26] *** b4b has joined ##OpenGL[06:51:13] *** wiky has joined ##OpenGL[06:51:45] *** wiky has quit IRC[06:51:53] *** samrat has quit IRC[06:53:39] *** XCVB has joined ##OpenGL[06:53:54] *** samrat has joined ##OpenGL[06:55:12] <XCVB> is there a function to use hex instead of using float in glColor3f[06:57:41] <slime> glColor3ub[06:59:21] <XCVB> so glColor4ub would be RGBA[07:00:09] *** SleekoNiko has joined ##OpenGL[07:00:46] *** XCVB has quit IRC[07:04:06] *** Riking has left ##OpenGL[07:15:44] *** bjz has quit IRC[07:20:47] *** hdon has quit IRC[07:22:06] *** WorldGenesis has joined ##OpenGL[07:24:46] *** b4b has quit IRC[07:26:33] *** Khlorghaal has joined ##OpenGL[07:29:59] *** qeed has quit IRC[07:41:42] *** stef has quit IRC[07:43:14] *** stef has joined ##OpenGL[07:45:27] *** WorldGenesis has quit IRC[07:55:13] *** delicado has quit IRC[07:58:52] *** Bigcheese_ is now known as Bigcheese[07:59:08] *** det- has joined ##OpenGL[07:59:17] *** det has quit IRC[08:06:06] *** charlie5 has quit IRC[08:07:13] *** bjz has joined ##OpenGL[08:11:32] *** bjz has quit IRC[08:18:04] *** BreadProduct has quit IRC[08:30:57] *** Garmine42 has quit IRC[08:36:27] <Codex_> http://sivut.koti.soon.fi/~terop/clouds.png[08:36:45] *** Lemml has joined 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ManDay has joined ##OpenGL[11:20:40] *** cr`nge has joined ##OpenGL[11:34:47] *** charlie5 has joined ##OpenGL[11:50:30] *** robot-beethoven has quit IRC[11:58:36] *** CamonZ has joined ##OpenGL[11:59:10] *** Suchorski has joined ##OpenGL[12:00:08] *** pauldachz has quit IRC[12:03:19] *** Hadrien has joined ##OpenGL[12:05:50] *** erhan_ has joined ##OpenGL[12:07:30] *** luxigo has quit IRC[12:08:02] *** RyanPridgeon has joined ##OpenGL[12:08:28] *** Misu has joined ##OpenGL[12:10:55] *** Ad1 has joined ##OpenGL[12:14:21] *** delicado has joined ##OpenGL[12:23:32] *** delicado is now known as Guest21346[12:25:25] *** Guest21346 has quit IRC[12:27:51] *** BitPuffin has joined ##OpenGL[12:29:20] *** AlexRussia_ is now known as AlexRussia[12:36:37] *** Misu2 has joined ##OpenGL[12:37:42] *** Misu has quit IRC[12:40:14] *** Keniyal has quit IRC[12:46:04] *** soulz has quit IRC[12:46:06] *** Misu2 has quit IRC[12:47:04] *** TheBix has quit IRC[12:48:41] *** Misu has joined ##OpenGL[12:50:38] *** paul424 has joined ##OpenGL[12:51:17] *** hexagoxel has joined ##OpenGL[12:53:18] *** Beetny has quit IRC[13:01:02] *** Demon_Fox has quit IRC[13:01:36] *** Misu2 has joined ##OpenGL[13:01:42] *** Misu has quit IRC[13:07:21] *** ManDay has quit IRC[13:07:29] *** Hadrien has quit IRC[13:09:21] *** foreignFunction has joined ##OpenGL[13:12:17] *** Shogun has joined ##OpenGL[13:14:54] *** Misu2 has quit IRC[13:17:41] *** Misu has joined ##OpenGL[13:31:07] *** AlexRussia has quit IRC[13:34:52] *** DolphinDream has quit IRC[13:35:28] *** DolphinDream has joined ##OpenGL[13:39:00] *** AlexRussia has joined ##OpenGL[13:40:40] *** monov has joined ##OpenGL[13:41:05] *** james4k has joined ##OpenGL[13:41:36] *** samrat has joined ##OpenGL[13:43:01] <monov> hi. http://imgur.com/wxRbVgs i'm rendering two overlapping cuboids (their faces share common pixels in XYZ). And when I rotate the scene around, along the overlapping edge there are sometimes 1-2 black pixels. any idea what might cause this?[13:43:03] *** urraka has joined ##OpenGL[13:43:20] <monov> it's not z-fighting because the two cuboids are lit and colored identically[13:44:53] *** Codex_ has quit IRC[13:46:07] *** james4k has quit IRC[13:46:32] *** DolphinDream has quit IRC[13:51:42] *** tha_grid has joined ##OpenGL[13:51:55] *** soulz has joined ##OpenGL[13:52:27] <tha_grid> hello all, i looking at some code and its not behaving like the manpage; glTexImage2D is not taking a *data argument[13:53:08] <tha_grid> there is some default behavior going on i assume?[13:54:19] *** soulz has quit IRC[13:54:28] <tha_grid> oh the fragment shader is generating frags for frame[13:55:38] <japro> what do you mean it is not "taking" it?[13:56:38] *** monov has quit IRC[14:01:42] *** timsche has joined ##OpenGL[14:03:05] *** samrat has quit IRC[14:05:52] *** samrat has joined ##OpenGL[14:09:48] <Yaniel> null as the data pointer?[14:12:42] *** samrat has quit IRC[14:14:08] *** paul424 has quit IRC[14:14:45] *** Smilex has joined ##OpenGL[14:15:10] <Smilex> Does glVertexAttribPointer have to be called per VBO?[14:16:40] <Yaniel> per vertex attribute[14:16:41] <HuntsMan2> no, per attribute[14:17:37] <Smilex> And it doesn't matter that a VBO is bound? I'm asking because I got strange results that I assumed was because of this[14:17:37] *** Codex_ has joined ##OpenGL[14:18:11] <derhass_> the vbo binding is essential[14:18:12] <HuntsMan2> Smilex: if a VBO is bound, then the data for the attribute comes from that VBO[14:19:10] <Yaniel> the currently bound VBO is part of the attribute data[14:19:25] <Yaniel> and is taken from the moment you call glVertexAttribPointer[14:19:43] <Smilex> HuntsMan2: I get that that's what happens when I draw, but I'm wondering if the attrib state has anything to do with the VBO that was bound when the attrib was declared (with glVertexAttribPointer)[14:20:23] <Smilex> Yaniel: Then I have to call glVertexAttribPointer for each VBO?[14:20:26] <HuntsMan2> Smilex: I just told you that yes, it does matter[14:20:29] <Yaniel> well, yes[14:20:33] <HuntsMan2> it is not for when you draw[14:20:40] <Yaniel> for each attribute in each vbo you want to use[14:20:42] *** paperManu_ has joined ##OpenGL[14:20:49] <Smilex> HuntsMan2: Sorry, didn't understand you then[14:21:05] <Smilex> Ok thanks guys[14:21:18] <derhass_> hmmm. HuntsMan2? what happened to HuntsMan1?[14:21:45] <HuntsMan2> derhass_: died by a criminal called peer :D[14:21:54] <Smilex> w[14:22:01] *** derhass_ is now known as derhass[14:22:08] <derhass> :)[14:22:56] <Smilex> Btw, is Vogl on topic here?[14:23:27] <HuntsMan2> what's Vogl? :D[14:23:44] *** jorj has joined ##OpenGL[14:24:00] <derhass> Smilex: it probably is[14:24:05] <Smilex> Valve's OGL debugger[14:24:07] *** Codex_ has quit IRC[14:25:30] <Smilex> Well does anyone else have issues with it, where it just freezes when you try to generate a trace of your application, but it works for the glxspheres test app?[14:27:25] *** AlexRussia has quit IRC[14:27:51] <derhass> Smilex: i never got it to work with my app[14:28:19] <Smilex> derhass: did you test it with glxspheres?[14:30:25] *** Crehl has joined ##OpenGL[14:30:42] *** samrat has joined ##OpenGL[14:32:35] *** delicado has joined ##OpenGL[14:33:06] *** centrinia has quit IRC[14:34:25] *** AlexRussia has joined ##OpenGL[14:46:15] *** Guest80091 has quit IRC[14:46:15] *** Guest80091 has joined ##OpenGL[14:46:20] *** Guest80091 is now known as Garmine[14:53:08] *** Jack_ has joined ##OpenGL[14:53:38] *** soulz has joined ##OpenGL[14:55:56] *** soulz has quit IRC[14:56:17] *** Guest40708 has quit IRC[14:58:02] *** Biliogadafr has joined ##OpenGL[15:04:52] *** RiVale has joined ##OpenGL[15:04:54] *** RyanPridgeon has quit IRC[15:06:46] *** delicado has quit IRC[15:15:54] *** Suchorski has quit IRC[15:15:59] *** Alina-malina has quit IRC[15:17:58] *** Match has joined ##OpenGL[15:18:38] *** Cabanossi has quit IRC[15:21:27] *** Alina-malina has joined ##OpenGL[15:21:27] *** Alina-malina has joined ##OpenGL[15:21:59] *** Jack has joined ##OpenGL[15:22:23] *** Jack is now known as Guest74787[15:24:20] *** Jack_ has quit IRC[15:25:13] *** Guest74787 has quit IRC[15:26:17] *** timsche has quit IRC[15:28:20] *** Alina-malina has quit IRC[15:29:46] *** bkre_ has joined ##OpenGL[15:31:34] *** Alina-malina has joined ##OpenGL[15:35:50] *** srcspider has joined ##OpenGL[15:36:02] *** srcspider has quit IRC[15:37:19] <Yaniel> sure it is on topic[15:37:34] *** bjz has joined ##OpenGL[15:40:06] *** charlie5 has quit IRC[15:41:21] *** samrat has quit IRC[15:43:37] *** edwardjohn has joined ##OpenGL[15:52:37] *** ragecryx has joined ##OpenGL[15:52:45] *** Bigpet_ has quit IRC[15:52:55] *** xissburg has joined ##OpenGL[15:56:59] *** RiVale has quit IRC[15:57:29] *** RiVale has joined ##OpenGL[15:58:59] *** qeed has joined ##OpenGL[16:05:47] *** slidercrank has quit IRC[16:08:06] *** Hadrien has joined ##OpenGL[16:09:33] *** DiffuseStorm has joined ##OpenGL[16:09:37] *** DiffuseStorm has left ##OpenGL[16:09:44] *** DiffuseStorm has joined ##OpenGL[16:11:21] *** ManDay has joined ##OpenGL[16:12:39] *** soulz has joined ##OpenGL[16:12:57] <DiffuseStorm> Nothing is happening after a glDrawArrays call, so not a crash, but the application froze in some way. What could be going on? Did something on the OpenGL side crash?[16:13:32] <DiffuseStorm> It's obviously something I'm doing wrong, some wrong arguments or something, but I'm wondering why the application simply freezes.[16:13:41] <HuntsMan2> opengl side?[16:13:49] <HuntsMan2> you can pastebin code[16:14:23] <Bloodust> froze?[16:14:30] <DiffuseStorm> glDrawArrays does not return[16:15:04] <DiffuseStorm> NVM[16:15:06] <DiffuseStorm> segmentation fault[16:15:53] <DiffuseStorm> Interesting, I had to start the application through the command line instead of through my IDE to see that.[16:16:39] <HuntsMan2> maybe your IDE attached a debugger and that's why the application look frozen[16:18:12] *** hdon has joined ##OpenGL[16:18:31] *** samrat has joined ##OpenGL[16:21:04] *** Jeanne-Kamikaze has joined ##OpenGL[16:21:35] *** Match has quit IRC[16:23:46] *** tha_grid has quit IRC[16:24:50] <Yaniel> I'd start looking for uninitialized variables by now[16:25:28] <Yaniel> IDEs tend to run stuff in a debugger which in turn tends to zero out all variables[16:25:56] <Yaniel> as a result strange stuff happens in release builds and on the command line[16:26:59] <Bloodust> yeah... dont dev on release settings[16:27:05] *** bb010g has quit IRC[16:32:13] *** Madsy has quit IRC[16:35:12] *** Madsy has joined ##OpenGL[16:37:11] *** lenarhoyt has joined ##OpenGL[16:45:49] *** samrat has quit IRC[16:50:50] *** Orion] has joined ##OpenGL[16:54:00] *** timsche has joined ##OpenGL[17:00:09] *** Hadrien has quit IRC[17:02:57] *** Waynes has quit IRC[17:03:34] *** Waynes has joined ##OpenGL[17:09:42] *** Khlorghaal has quit IRC[17:17:02] *** b4b has joined ##OpenGL[17:18:47] *** james4k has joined ##OpenGL[17:20:38] *** Ad1 has quit IRC[17:22:20] *** bjz has quit IRC[17:22:35] *** bjz has joined ##OpenGL[17:23:23] *** james4k has quit IRC[17:25:20] *** MLM has joined ##OpenGL[17:25:52] *** ManDay has quit IRC[17:27:16] *** kuldeepdhaka has joined ##OpenGL[17:27:43] *** HunterD has joined ##OpenGL[17:29:54] *** delicado has joined ##OpenGL[17:38:37] *** HunterD has quit IRC[17:52:02] *** ValicekB has quit IRC[17:53:02] <hdon> hi all :) can i skip GL_ELEMENT_ARRAY_BUFFER if my buffer would literally just be sequentially 0...n ?[17:54:08] <cmr-> hdon: sure[17:54:18] <hdon> oh... sweet[17:54:20] <hdon> thanks[17:54:26] <cmr-> hdon: just make sure you don't forget to bind 0[17:54:53] *** cmr- is now known as cmr[17:54:54] *** cmr has joined ##OpenGL[17:55:52] <hdon> cmr, how do i do that?[17:56:07] <hdon> cause my driver just segfaulted when i did that[17:56:17] *** Twinklebear has joined ##OpenGL[17:56:58] <cmr> glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0)[17:57:14] <hdon> i think that is alread the case, but maybe i'm wrong. *tries*[17:57:51] *** RyanPridgeon has joined ##OpenGL[17:57:59] <hdon> same result cmr. could i have a driver bug?[17:58:47] <cmr> I truly can't imagine that unbinding a target would be broken in *any* driver[17:59:02] *** ValicekB has joined ##OpenGL[17:59:57] <hdon> cmr, sorry, the segfault is occurring in the same place as before, in glDrawElements()[18:00:20] <cmr> hdon: ah, you can't call glDrawElements without ELEMENT_ARRAY_BUFFER being bound to something[18:00:23] <cmr> use glDrawArrays like usual[18:00:26] <hdon> ahhhh right![18:00:32] *** erhan_ has quit IRC[18:03:07] <hdon> thanks cmr :)[18:04:16] *** kuldeepdhaka has quit IRC[18:04:24] *** timsche has quit IRC[18:07:26] *** Plasmastar has quit IRC[18:08:05] *** samrat has joined ##OpenGL[18:08:05] *** Misu has quit IRC[18:08:41] *** Misu has joined ##OpenGL[18:13:58] *** Plasmastar has joined ##OpenGL[18:15:35] *** alhsekufahlsief has joined ##OpenGL[18:16:06] *** alhsekufahlsief has left ##OpenGL[18:16:36] *** erhan_ has joined ##OpenGL[18:17:23] *** alhsekufahlsief has joined ##OpenGL[18:20:50] *** cr`nge has quit IRC[18:22:06] *** pauldachz has joined ##OpenGL[18:25:19] *** jbud has joined ##OpenGL[18:25:21] *** AlexRussia has quit IRC[18:25:33] *** shingshang has quit IRC[18:26:26] *** 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joined ##OpenGL[19:22:17] *** Zupoman has joined ##OpenGL[19:29:25] *** zgreg_ has joined ##OpenGL[19:29:25] *** zgreg has quit IRC[19:30:31] *** ice9 has joined ##OpenGL[19:32:11] <ice9> whats the difference between OpenGL and OpenSceneGraph?[19:32:22] *** zgreg_ has quit IRC[19:33:25] *** realz__ is now known as realz[19:33:29] *** realz has joined ##OpenGL[19:34:56] *** zgreg has joined ##OpenGL[19:36:27] *** Twinklebear has quit IRC[19:36:58] <DiffuseStorm> ice9: Basically, OpenGL is a way to talk to the GPU, GPU makers like AMD and NVIDIA create drivers and hardware that implement OpenGL.[19:37:48] <DiffuseStorm> ice9: While OpenSceneGraph is a library that uses OpenGL but implements higher level concepts like a SceneGraph. So it figures out what to tell the gpu to draw, for example.[19:40:56] *** linuxuz3r has joined ##OpenGL[19:42:34] *** alhsekufahlsief1 has joined ##OpenGL[19:42:34] <ice9> DiffuseStorm: great; so to draw and visualize something as in simulation it's easier to do it in OSG[19:43:39] *** ville has quit IRC[19:44:27] <bob_twinkles> probably, OSG handles a lot of nuts and bolts for you[19:44:31] *** timsche has joined ##OpenGL[19:45:17] *** ville has joined ##OpenGL[19:45:36] *** alhsekufahlsief has quit IRC[19:48:31] *** telex has quit IRC[19:49:13] *** SnakeTrailSteve has quit IRC[19:50:39] *** telex has joined ##OpenGL[19:52:10] *** ValicekB has quit IRC[19:53:35] *** zgreg has quit IRC[19:54:37] *** Khlorghaal has joined ##OpenGL[19:55:37] *** ice9 has quit IRC[19:56:43] *** DiffuseStorm has quit IRC[19:57:51] *** zgreg has joined ##OpenGL[19:58:20] *** jdolan has quit IRC[19:59:04] *** ValicekB has joined ##OpenGL[20:02:08] *** SnakeTrailSteve has joined ##OpenGL[20:05:57] *** 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##OpenGL[21:13:21] *** samrat has joined ##OpenGL[21:15:07] *** TunnelCat has quit IRC[21:15:59] *** zgreg has joined ##OpenGL[21:16:37] *** paul424 has quit IRC[21:16:49] *** Ad1_RN has quit IRC[21:17:42] *** zgreg has quit IRC[21:18:03] *** shintah has quit IRC[21:18:39] *** paul424 has joined ##OpenGL[21:18:47] *** clauswitt has joined ##OpenGL[21:20:58] *** zgreg has joined ##OpenGL[21:21:14] *** Twinklebear has joined ##OpenGL[21:22:07] *** Ad1 has joined ##OpenGL[21:22:13] *** Zerflag has quit IRC[21:22:50] *** Zerflag has joined ##OpenGL[21:23:13] *** Garner has quit IRC[21:23:21] *** shintah has joined ##OpenGL[21:25:01] *** b4b has quit IRC[21:27:02] *** erhan_ has quit IRC[21:27:20] *** Zerflag has quit IRC[21:31:57] *** erhan_ has joined ##OpenGL[21:33:02] *** edwardjohn has quit IRC[21:35:28] *** paul424 has quit IRC[21:37:54] *** Biliogadafr has joined ##OpenGL[21:39:49] *** Zerflag_ has joined ##OpenGL[21:42:52] *** Zerflag_ has quit IRC[21:45:59] *** clauswitt has quit IRC[21:46:03] *** walnutown has joined ##OpenGL[21:47:37] *** walnutown has left ##OpenGL[21:48:16] *** Micro_AC_DC is now known as AlexRussia[21:50:22] *** clauswitt has joined ##OpenGL[21:51:27] *** XCVB has joined ##OpenGL[21:51:36] *** Garner has joined ##OpenGL[21:52:28] <XCVB> Is there a cube map editor like tiled but in 3d[21:56:52] *** Match has quit IRC[21:57:17] *** zgreg has quit IRC[22:01:24] *** zgreg has joined ##OpenGL[22:08:53] *** b4b has joined ##OpenGL[22:10:04] *** Biliogadafr has quit IRC[22:11:20] *** Biliogadafr has joined ##OpenGL[22:11:25] *** DiffuseStorm has quit IRC[22:11:32] *** Zerflag has joined ##OpenGL[22:14:36] *** Biliogadafr has quit IRC[22:15:49] *** Demon_Fox has joined ##OpenGL[22:17:14] *** Jonatan_ has quit IRC[22:17:56] *** Biliogadafr has joined ##OpenGL[22:19:03] *** Chais has joined ##OpenGL[22:19:26] <Chais> what's the usual order of operations when dealing with modelview matrices?[22:19:34] *** Smilex has joined ##OpenGL[22:19:57] *** Biliogadafr has quit IRC[22:20:14] *** zgreg has quit IRC[22:20:20] *** zgreg has joined ##OpenGL[22:20:26] <Smilex> Are there any tools for debugging GLSL shaders that run on Linux? glsl-debugger doesn't work[22:20:37] <Codex_> chais: vec4 v = in_P * in_T * in_MV * vec4(in_Position,1.0);[22:21:38] *** Biliogadafr has joined ##OpenGL[22:21:43] <Chais> Codex_: in_T benig?[22:21:48] <Chais> *being[22:22:37] <Codex_> uniform mat4 in_T;[22:22:48] <Codex_> those are just some matrices[22:23:06] <Chais> I'm stumbling around with webgl here. I'm trying to get rotatition around multiple, independent axis[22:23:23] *** SHLV has quit IRC[22:23:26] <Chais> and for some reason the torus I'm trying to rotate is also moving around[22:24:54] *** narcan has joined ##OpenGL[22:26:46] *** Biliogadafr has quit IRC[22:28:56] *** Jonatan has joined ##OpenGL[22:29:32] *** Biliogadafr has joined ##OpenGL[22:30:10] *** kuldeepdhaka has quit IRC[22:30:53] *** lenarhoyt has quit IRC[22:35:33] *** edwardjohn has joined ##OpenGL[22:35:34] *** Biliogadafr has quit IRC[22:37:34] *** edwardjohn has quit IRC[22:37:51] *** Biliogadafr has joined ##OpenGL[22:38:40] *** Langdal has joined ##OpenGL[22:44:04] *** luxigo has joined ##OpenGL[22:44:47] *** Lemml has quit IRC[22:45:29] *** themanwithnoface has quit IRC[22:46:25] *** Biliogadafr has quit IRC[22:46:27] <Langdal> How can I colour the cylinder I made with gluCylinder() ? To color other objects I use a colour buffer and a simple vertex shader and fragment shader, but it doesn't seem to work with gluCylinder.[22:46:37] *** samrat has quit IRC[22:47:00] <Langdal> But if I hardcode the colour returned by the fragment shader, then it works.[22:48:50] *** Biliogadafr has joined ##OpenGL[22:49:28] *** Biliogadafr has quit IRC[22:50:07] *** zgreg has quit IRC[22:50:35] *** Shogun has quit IRC[22:51:55] *** XCVB has quit IRC[22:53:12] *** Voidwalkr has joined ##OpenGL[22:55:06] *** quovadis has joined ##OpenGL[22:56:44] *** Suchorski has joined ##OpenGL[22:57:36] *** void256 has joined ##OpenGL[22:58:38] *** zgreg has joined ##OpenGL[23:03:27] *** Zerflag has quit IRC[23:05:26] *** zgreg has quit IRC[23:05:37] <chrisf> Langdal: should really not use glu[23:07:06] <DrBenway> this might sound trivial but i'm creating a square that goes from -0.5 to 0.5 and the same on the y axis. Then i'm creating an orthographic projection matrix that also goes from -0.5 0.5 for left right bot top and then 1 and -1 for near and far. rendering this should make the square be exactly what the screen is?[23:07:10] <Langdal> chrisf: For other things I have used a VBO of vertices and glDrawArrays, but I'm not sure how to draw a cylinder without glu.[23:07:22] <DrBenway> or is there another factor that im forgetting[23:07:32] *** TyrfingMjolnir has joined ##OpenGL[23:07:38] <DrBenway> it's almost there but there seems to be a missing section at the top of the screen[23:07:55] *** Waynes has quit IRC[23:07:57] <chrisf> Langdal: find or write a similar generator; stick the resulting geometry in a vbo[23:08:42] <Codex_> langdal: i had to write cylinder (and few other shapes) from scratch to make them use modern opengl[23:08:43] *** zgreg has joined ##OpenGL[23:09:03] <Langdal> Ok I'll try to write my own generator[23:09:11] *** james4k has joined ##OpenGL[23:11:17] *** luxigo has quit IRC[23:12:35] <chrisf> Langdal: glu's generators use glBegin/glEnd behind the scenes.[23:13:55] *** DolphinDream has joined ##OpenGL[23:14:13] <Langdal> chrisf: I see. I was hoping it would be something similar to glDrawArrays except that the function provided the vertices.[23:15:24] *** luxigo has joined ##OpenGL[23:15:35] <Codex_> langdal: here's what I ended up after doing some shapes: http://sivut.koti.soon.fi/~terop/GameApi.html[23:15:58] <Langdal> Codex_: Thank you, I will look at it[23:16:10] <Codex_> langdal: it builds some data structures, instead of just blitting to screen[23:16:28] *** Bigpet_ has joined ##OpenGL[23:16:50] *** Jeanne-Kamikaze has quit IRC[23:17:54] *** bb010g has joined ##OpenGL[23:18:37] *** Lucretia has quit IRC[23:19:44] *** luxigo has quit IRC[23:19:46] *** Lucretia has joined ##OpenGL[23:21:52] *** ShadowIce has quit IRC[23:25:29] *** zgreg has quit IRC[23:25:35] *** zgreg has joined ##OpenGL[23:25:58] *** luxigo has joined ##OpenGL[23:26:28] *** magicthing has left ##OpenGL[23:30:59] *** hexagoxel has quit IRC[23:32:28] *** zgreg has quit IRC[23:32:34] *** zgreg has joined ##OpenGL[23:35:44] *** erhan_ has quit IRC[23:36:09] *** slidercrank has joined ##OpenGL[23:36:29] <Codex_> i did this recently: http://sivut.koti.soon.fi/~terop/clouds.png[23:39:54] <Smilex> modf in GLSL returns one value as an argument. How do I pass it a "pointer"?[23:40:40] <Stragus> You want to break a pointer into an integer and fractional part?[23:41:36] <Smilex> Stragus: no I want to break a float, but I don't know what to pass to the second parameter[23:42:16] *** luxigo has quit IRC[23:44:12] <Madsy> Smilex: Have you read the spec for the function? Seems pretty clear to me[23:44:21] <Madsy> https://www.opengl.org/sdk/docs/man/html/modf.xhtml[23:44:41] *** luxigo has joined ##OpenGL[23:44:49] <Smilex> Madsy, I did. I tried calling a = modf(b, out c) but I get an error[23:45:04] <glYoda> "modf in GLSL returns one value as an argument. How do I pass it a "pointer"?" …you don't -- there aren't any "pointers" in GLSL[23:45:13] <Madsy> You don't write "out"[23:45:27] <glYoda> there is no "pass by pointer" either[23:45:34] <glYoda> read the spec[23:46:14] *** zgreg has quit IRC[23:46:23] <Smilex> glYoda: I know there's no pointer, which is why I added the "". But I want pointer-like functionality. I want to get that second return value[23:46:46] <glYoda> again you don't… such functionality doesn't exist in this langauge[23:46:52] <glYoda> *language[23:46:58] <glYoda> the spec is quite clear about this[23:47:01] <HuntsMan2> Smilex: what second return value? there is no such return value[23:47:06] <Smilex> Madsy: The reference card says otherwise. Either way, it failed when I didn't add the 'out'. Perhaps some other error of mine?[23:47:15] *** bb010g has quit IRC[23:47:26] *** centrinia is now known as robbb_www1[23:47:34] <Madsy> Smilex: All gentypes must be of the same type[23:47:35] <Smilex> HuntsMan2: the second parameter, named 'i'[23:47:35] <glYoda> explain the problem you are trying to solve here… i.e. why you think you need this particular sort of feature[23:48:05] <HuntsMan2> Smilex: ah, just put a variable there :D[23:48:35] <Madsy> Smilex: So in your example, a,b and c must be of the same type[23:48:36] <Smilex> glYoda: I need to seperate a float, which is calculated by gl_FragCoord.x / column.[23:49:06] *** james4k has quit IRC[23:49:11] <Smilex> 0:17(11): error: no matching function for call to `modf(float, float)'; candidates are:[23:49:18] <Smilex> that's what I get if I just pass the value[23:49:34] *** luxigo has quit IRC[23:49:36] <glYoda> frexp then[23:49:41] <Smilex> frexp?[23:49:43] <HuntsMan2> Smilex: and what's the code?[23:49:53] <Smilex> Also, I'm assuming vec2 defaults to float values[23:50:12] <glYoda> assuming you wish to decompose your "float" type[23:50:24] <Smilex> HuntsMan2: Do you by chance know how to easily paste code out of Vim?[23:50:37] <HuntsMan2> Smilex: nope[23:50:42] <glYoda> (i.e. into the relevant significand and exponent terms)[23:51:31] <Smilex> glYoda: I expect frexp won't run on ES 2?[23:51:38] <glYoda> in any case modf isn't going to give you what you want[23:51:41] <Smilex> says it was introduced at 4.0[23:51:59] <glYoda> of course it won't be supported under ES2[23:52:48] <Smilex> I want that to support mobile devices[23:52:51] *** luxigo has joined ##OpenGL[23:53:51] *** robbb_www1 is now known as MinFarshaw[23:54:44] *** james4k has joined ##OpenGL[23:55:16] <glYoda> it would have been useful to state that up front[23:55:38] <glYoda> in any case as I said earlier modf isn't going to give you what you want[23:56:06] <glYoda> and frexp (which AFAICT is what you seem to be after) isn't going to be available under ES 2.x[23:56:07] *** Codex_ has quit IRC[23:56:28] *** Smilex has quit IRC[23:57:27] <glYoda> while one could decompose this manually I wouldn't consider that to be a worthwhile exercise[23:58:18] *** Smilex has joined ##OpenGL[23:59:42] *** zgreg has joined ##OpenGL