July 8, 2019 
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July 8, 2019 [00:00:11] <derhass> why should the texture allocation generate an error? I don't see anything wrong with that[00:00:24] *** karab44 <karab44!~karab44@unaffiliated/karab44> has quit IRC ()[00:02:49] *** Cyp_ <Cyp_!~Cyp_@2a05:f6c7:2883::2> has quit IRC (Ping timeout: 252 seconds)[00:07:53] <execi> i don't see anything wrong with it either, anymore:D[00:08:15] <execi> and yeah, i set up a debug context with a debug callback to print out errors now...[00:09:22] <derhass> it is funny (or maybe sad?) how many people still do not use debug output although support for it is really widespread nowadays[00:09:53] <derhass> I even added it to my "Hello Cube" example to make the feature more popular to beginners[00:10:23] <execi> oh, i'm not the only one![00:10:38] <execi> it's really simple to set up too, so myeah[00:11:28] <derhass> most tutorials etc. simply don't mention it[00:19:53] <FLHerne> derhass: Do other drivers not have some equivalent to MESA_DEBUG?[00:20:23] *** porky11 <porky11!~porky11@p200300F843C828F0523EAAFFFE8E5C72.dip0.t-ipconnect.de> has quit IRC (Quit: Leaving)[00:20:38] <derhass> FLHerne: I'm not aware of that, at least[00:20:52] <FLHerne> (env. var to dump GL debug errors to stderr without explicit callback boilerplate)[00:21:05] <derhass> yeah, I know the mesa one[00:21:14] <derhass> what I meant is I'm not aware of other drivers offering that[00:21:29] <derhass> havent read it in context of the nvidia proprietary driver[00:21:46] <derhass> and also never seen such a feature on any windows driver[00:21:46] <FLHerne> I mean, it's probably best practice to handle them properly, but I don't exactly plan on anyone else seeing GL errors at all :P[00:22:11] <derhass> but I never specifically searched for it either, so it might exist[00:22:31] <derhass> FLHerne: then don't use GL[00:22:51] <FLHerne> Odd, I wonder why[00:22:57] <derhass> there is too much interception goin on for you to hide your gl erros from others really wanting to look[00:23:18] <FLHerne> Oh, I didn't mean that[00:23:56] <derhass> you can use a no-error context :)[00:25:29] <FLHerne> Just that if I don't need error-callback handlers for my own use, I don't care about them because when it's done there should be no errors[00:25:35] <FLHerne> Oh, yes, that's a thing[00:28:51] <derhass> well, I really advice the use of a debug callback during development, and also at least suggest to leave it in as some option in a release build. at some point, some strange behavior migh appear on some weird costumer setup, and being able to get the gl debug output of that might help debugging it[00:29:18] <derhass> it of course always depends[00:47:28] *** LunarJetman <LunarJetman!LunarJetma@94.14.216.120> has quit IRC (Ping timeout: 246 seconds)[01:00:05] *** tab-key <tab-key!~mantra@2601:601:c980:8fd:9529:9608:3123:369d> has joined ##OpenGL[01:01:28] *** mukunda <mukunda!~mukunda@adsl-68-19-173-211.jan.bellsouth.net> has joined ##OpenGL[01:10:50] *** Karyon <Karyon!~Karyon@unaffiliated/karyon> has joined ##OpenGL[01:11:07] *** bpmedley 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(www.adiirc.com))[12:06:09] *** Goanna <Goanna!~AdiIRC@124-170-161-30.dyn.iinet.net.au> has joined ##OpenGL[12:19:12] *** Singmyr <Singmyr!~Singmyr@c83-253-123-62.bredband.comhem.se> has quit IRC (Ping timeout: 245 seconds)[12:21:15] *** pa <pa!~pa@unaffiliated/pa> has joined ##OpenGL[12:22:13] <Yaniel> derhass: where's that example?[12:23:07] <Yaniel> could replace the examples currently in the topic, they look a bit scary[12:30:23] *** immibis <immibis!~immibis@222-153-90-196-fibre.sparkbb.co.nz> has quit IRC (Remote host closed the connection)[12:37:43] *** immibis <immibis!~immibis@222-153-90-196-fibre.sparkbb.co.nz> has joined ##OpenGL[12:38:36] *** Goanna <Goanna!~AdiIRC@124-170-161-30.dyn.iinet.net.au> has quit IRC (Remote host closed the connection)[12:40:19] *** Goanna <Goanna!~AdiIRC@124-170-161-30.dyn.iinet.net.au> has joined ##OpenGL[12:55:27] *** iderik <iderik!~weechat@h-162-65.A147.priv.bahnhof.se> has joined ##OpenGL[13:02:36] *** DrGonzo <DrGonzo!~DrGonzo@modemcable080.164-57-74.mc.videotron.ca> has joined ##OpenGL[13:03:18] *** slime <slime!~slime73@blk-215-81-93.eastlink.ca> has joined ##OpenGL[13:04:45] *** CoolerZ <CoolerZ!~coolerext@14.139.38.135> has joined ##OpenGL[13:20:29] *** slime <slime!~slime73@blk-215-81-93.eastlink.ca> has quit IRC (Quit: This computer has gone to sleep)[13:21:48] *** pa <pa!~pa@unaffiliated/pa> has quit IRC (Ping timeout: 244 seconds)[13:32:43] *** Singmyr <Singmyr!~Singmyr@c83-253-123-62.bredband.comhem.se> has joined ##OpenGL[13:35:17] *** pa <pa!~pa@unaffiliated/pa> has joined ##OpenGL[13:35:45] *** DrGonzo <DrGonzo!~DrGonzo@modemcable080.164-57-74.mc.videotron.ca> has quit IRC (Ping timeout: 244 seconds)[13:42:51] *** Goanna <Goanna!~AdiIRC@124-170-161-30.dyn.iinet.net.au> has quit IRC (Quit: Going offline, see ya! (www.adiirc.com))[13:44:59] *** groton <groton!~groton@unaffiliated/groton> has joined ##OpenGL[13:45:05] *** groton <groton!~groton@unaffiliated/groton> has quit IRC (Client Quit)[13:45:16] <derhass> Yaniel: https://github.com/derhass/HelloCube[14:01:58] *** deathwishdave <deathwishdave!~deathwish@18-65.aztec.hns.net> has joined ##OpenGL[14:36:48] *** mads- <mads-!~mfrstar@tenderloin.whatbox.ca> has joined ##OpenGL[14:37:23] <mads-> I'm brand new at OpenGL and want to learn it over the summer. Can you recommend a good book or is the best approach to use the tutorial in topic?[14:40:55] <Yaniel> the tutorial[14:41:46] <Yaniel> there are some decent books but unless you strongly prefer learning from dead trees the online tutorials will be more up to date and often more informative[14:42:23] <Yaniel> and if you have an e-reader you can download the tutorial linked in the topic for that[14:43:13] <mads-> Yaniel: I prefer books to a degree. But if the online one is better and more updated I will pick quality :) Thanks[14:43:31] <Yaniel> one word of warning before you start: you should *really* know your programming language of choice[14:43:42] <Yaniel> especially how it works with libraries[14:44:27] <Yaniel> in my experience e-ink is practically as pleasant on the eyes as paper so the e-book remains a viable compromise :)[14:46:43] <BPL> out of curiosity, which book you guys are talking about? the learnopengl.com site?[14:46:46] <Yaniel> yes[14:46:59] <Yaniel> "the tutorial in the topic"[14:47:16] <BPL> ah, ok :) , y, it's a pretty basic good tutorial to get started[14:47:25] <derhass> I'd prefer https://alfonse.bitbucket.io/oldtut/[14:47:27] <Yaniel> :D[14:47:42] <Yaniel> it does go all the way to physically-based shading and image-based lighting[14:48:23] <Yaniel> so I wouldn't exactly call it basic[14:52:22] *** immibis <immibis!~immibis@222-153-90-196-fibre.sparkbb.co.nz> has quit IRC (Ping timeout: 246 seconds)[15:04:38] *** snyp <snyp!~Snyp@202.83.17.8> has quit IRC (Ping timeout: 245 seconds)[15:05:37] *** esrse <esrse!~nil@175.126.171.165> has quit IRC (Ping timeout: 248 seconds)[15:05:51] <mads-> BPL: Why is it called oldtut? Is there a new one?[15:06:18] <derhass> mads-: I'm not aware of a new version of it[15:06:25] <Yaniel> it's some old tutorial that used to be hosted elsewhere[15:06:34] <Yaniel> IIRC[15:06:45] <derhass> actually, It only covers what we now call "modern" GL (core profile)[15:06:46] <BPL> mads-: you wanted to ping derhass ;) , never read that tutorial, although looks nice as well[15:07:04] <derhass> although, "modern" GL is a decade old by this point[15:07:08] <derhass> but it is still fine[15:07:31] <BPL> mads-: So you're gonna learn opengl, any experience with other 3d graphics or other APIs?[15:07:45] <BPL> *with 3d graphics[15:09:11] <mads-> BPL: Aah sorry, just put in lenses :) I have experience in ray tracing.[15:09:13] <mads-> you?[15:10:33] <BPL> ah, that's cool, if you've got experience with raytracing learning opengl is a next good logical step. Me? I've got a bit of experience with 3d graphics in general[15:12:37] <BPL> mads-: If you want to take a different approach to learn opengl, before reading any opengl book maybe this one https://github.com/ssloy/tinyrenderer/wiki is also worth looking[15:13:48] <BPL> oh, I see the author has added more tiny* projects, I only knew about the tinyrenderer one hehe :)[15:13:58] *** hellozee <hellozee!~hellozee@2409:4066:13:994:2c88:ea58:15e2:bc3f> has quit IRC (Ping timeout: 252 seconds)[15:13:58] <BPL> cool stuff[15:16:38] <BPL> https://github.com/ssloy/tinyraytracer/wiki/Part-1:-understandable-raytracing#conclusion ... 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ZZZzzz…)[20:53:49] *** zalt <zalt!~lambda443@unaffiliated/lambda443> has joined ##OpenGL[20:57:00] *** KAHR-Alpha <KAHR-Alpha!~Alpha@2a01cb0d024a6600dddef45c5862a040.ipv6.abo.wanadoo.fr> has joined ##OpenGL[21:06:04] *** Karyon <Karyon!~Karyon@unaffiliated/karyon> has quit IRC (Ping timeout: 264 seconds)[21:16:07] *** tinshoes <tinshoes!~pseudotin@2601:180:4102:bcc9:b443:caf:5ee5:3b81> has quit IRC (Read error: Connection reset by peer)[21:16:48] *** gehn <gehn!gehn@gateway/vpn/privateinternetaccess/gehn> has joined ##OpenGL[21:27:25] *** Guest29508 <Guest29508!~Aster@c80-217-128-16.bredband.comhem.se> has quit IRC (Changing host)[21:27:25] *** Guest29508 <Guest29508!~Aster@april-fools/2013/ninth/aster> has joined ##OpenGL[21:27:30] *** Guest29508 is now known as Aster[21:37:11] *** Singmyr <Singmyr!~Singmyr@c83-253-123-62.bredband.comhem.se> has joined ##OpenGL[21:47:51] *** iderik <iderik!~weechat@h-162-65.A147.priv.bahnhof.se> has quit IRC (Quit: iderik)[22:04:51] *** wedr <wedr!484a82af@pool-72-74-130-175.bstnma.fios.verizon.net> has joined ##OpenGL[22:06:16] <wedr> Which is correct for setting up the offset value to pass to glVertexAttribPointer() for interweaving vertex data? sizeof(GL_FLOAT) or sizeof(GLfloat) ?[22:06:48] <wedr> Nevermind, found my answer immediately after asking about it.[22:06:58] <wedr> GL_FLOAT is a macro, GLfloat is a type.[22:07:18] <derhass> and both seem wrong[22:07:20] *** Kane <Kane!~Kane@home.yarg.fr> has quit IRC (Quit: Leaving)[22:07:31] <wedr> hmmmmm[22:08:26] <wedr> derhass The reason I asked is because there is this SO answer that's credited to you here. https://stackoverflow.com/questions/16380005/opengl-3-4-glvertexattribpointer-stride-and-offset-miscalculation And in the answer, it used sizeof(GL_FLOAT) and I was thinking what is appropriate for this.[22:08:33] <derhass> not sure what your vertex layout really is, of course[22:08:56] <wedr> It's fine. It's just interweaved (xyzrgb, xyzrgb, etc.)[22:09:34] <derhass> then I don't see where an offset of sizeof(GLfloat) would be appropriate[22:10:43] <wedr> I guess. It's supposed to be 3 * sizeof(GLfloat) and 6 * sizeof(GLfloat), respectively for vertex position and vertex color.[22:11:08] <derhass> I think it is closer, but still not correct[22:11:15] <gehn> why would sizeof(GLfloat) be wrong?[22:11:26] <gehn> GLfloat should literally just be an alias to `float` no?[22:11:37] <derhass> gehn: that wasn't my point[22:12:32] <wedr> I don't have an answer. :([22:13:00] <derhass> wedr: if your buffer is (xyzrgb, xyzrgb), what would be the byte offset to the first x?[22:13:24] <wedr> The byte offset would be 0[22:13:29] <derhass> I also think so[22:15:40] <wedr> Ok, this is what I wrote. https://hatebin.com/uriveqsdwi and this is the output result on the screen. https://i.imgur.com/xIDBiIX.png I think i did this correctly now.[22:15:52] *** cfoch <cfoch!uid153227@gateway/web/irccloud.com/x-bjqiabumldvqmwzf> has quit IRC (Quit: Connection closed for inactivity)[22:16:22] <derhass> yeah, that looks plausible now[22:17:06] <wedr> Thanks for your answer on Stack Overflow[22:17:43] <derhass> LOL, did I answer that question?[22:17:49] <derhass> could b e[22:18:01] <wedr> You indirectly answered it.[22:18:08] <derhass> 2013. lol[22:22:43] *** slvn_ <slvn_!~slvn_@2a01:e34:ef55:a6f0:9d69:fc7e:6beb:85b2> has quit IRC (Quit: Leaving)[22:24:57] *** shhuun_ <shhuun_!~shun@80.214.113.107> has joined ##OpenGL[22:26:45] *** slime <slime!~slime73@24.215.81.93> has joined ##OpenGL[22:31:46] *** CoolerX <CoolerX!~coolerext@14.139.38.135> has quit IRC (Quit: Leaving)[22:40:49] *** ImQ009 <ImQ009!~ImQ009@unaffiliated/imq009> has quit IRC (Quit: Leaving)[22:52:27] *** immibis <immibis!~immibis@222-153-90-196-fibre.sparkbb.co.nz> has joined ##OpenGL[22:59:08] *** mort <mort!~mort96@snow/mort96> has quit IRC (Remote host closed the connection)[23:04:01] *** immibis <immibis!~immibis@222-153-90-196-fibre.sparkbb.co.nz> has quit IRC (Ping timeout: 248 seconds)[23:04:27] *** ipe <ipe!~ipe@91-156-247-55.elisa-laajakaista.fi> has quit IRC (Read error: Connection reset by peer)[23:05:58] *** gehn <gehn!gehn@gateway/vpn/privateinternetaccess/gehn> has quit IRC (Quit: Leaving)[23:08:09] *** LunarJetman <LunarJetman!LunarJetma@94.14.216.120> has quit IRC (Ping timeout: 268 seconds)[23:08:15] *** ciaala <ciaala!~crypt@2a02:120b:2c1f:5f40:6ef0:49ff:feee:4777> has quit IRC (Quit: Konversation terminated!)[23:08:22] *** Goanna <Goanna!~AdiIRC@124-170-161-30.dyn.iinet.net.au> has joined ##OpenGL[23:11:39] *** dansho <dansho!~dansho4@71-84-161-204.dhcp.astr.or.charter.com> has joined ##OpenGL[23:17:29] *** lilabsence <lilabsence!~RizzoTheR@dyndsl-031-150-142-089.ewe-ip-backbone.de> has quit IRC (Remote host closed the connection)[23:17:47] *** lilabsence <lilabsence!~RizzoTheR@dyndsl-031-150-142-089.ewe-ip-backbone.de> has joined ##OpenGL[23:18:06] *** LunarJetman <LunarJetman!LunarJetma@94.14.216.120> has joined ##OpenGL[23:31:25] *** hellozee <hellozee!~hellozee@2409:4066:13:994:2c88:ea58:15e2:bc3f> has quit IRC (Ping timeout: 276 seconds)[23:56:30] *** stefkos <stefkos!~Pawel@79.184.189.107.ipv4.supernova.orange.pl> has quit IRC (Quit: Going offline, see ya! 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