November 18, 2014 
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November 18, 2014 [00:00:02] *** paul424 has joined ##OpenGL[00:00:28] *** snakenerd has joined ##OpenGL[00:01:05] *** snakenerd has quit IRC[00:05:56] *** ClarusCogitatio has quit IRC[00:08:30] *** robot-beethoven has joined ##OpenGL[00:10:02] *** ClarusCogitatio has joined ##OpenGL[00:11:20] *** PasNox has quit IRC[00:13:43] *** Shockk has joined ##OpenGL[00:13:54] <Shockk> hello, I have a quick question about deprecation in opengl[00:14:18] *** Misu has quit IRC[00:14:29] <Shockk> I'm writing an application and I detect if opengl 3.2 is supported on the current system,[00:15:20] <Shockk> this causes an issue because os x creates a 3.3 core context instead of a 3.2 core context; and I wanted to ask:[00:15:35] <foobaz> a 3.3 context is also a perfectly valid 3.2 context[00:16:14] <foobaz> i write all my code for 3.3, my driver gives me a 4.4 context, it works fine[00:16:32] <Shockk> if I support major >= 3 and minor >= 2, will an opengl core context always have the 3.2 features, or does the possibility exist that some of these features would be deprecated?[00:17:22] <foobaz> technically, any core context should have the 3.2 features, because core profile was added in 3.2[00:17:44] <foobaz> but unfortunately mesa on linux will give you a 3.1 "core profile" context[00:17:58] <foobaz> if 3.1 is the highest supported[00:18:11] * Shockk nods[00:18:28] <Shockk> so if I just check that major is at least 3 and minor at least 2, should I be okay?[00:18:34] <foobaz> yea[00:18:40] <Shockk> great, thanks very much[00:18:57] *** doomlord_1 has joined ##OpenGL[00:19:02] <chrisf> uh, careful wth that check. as stated, 4,0 wouldnt work[00:19:12] <Shockk> oh[00:19:12] <derhass_> well. strictly speaking, newer versions can delcare existing features as deprecated, or can remove them[00:19:15] <derhass_> this actually happens[00:19:18] <Shockk> chrisf: good point[00:19:29] <derhass_> but for rather obscure stuff[00:19:39] <Shockk> derhass_: ah I see[00:19:48] <foobaz> the only major deprecation event in opengl history did not break existing code in that way[00:19:54] <foobaz> i don't think it's likely to happen in the future either[00:20:06] <derhass_> foobaz: it already has happened[00:20:31] <foobaz> how? if you want a core profile context you have to specifically request it, or use an API new enough to default to it[00:21:00] <derhass_> foobaz: it is not about core vs. compat[00:21:08] <foobaz> line widths?[00:21:08] <derhass_> foobaz: 4.2 did deprectae features, 4.3 did[00:21:21] <foobaz> GL_POLYGON_SMOOTH?[00:22:06] <slime> derhass_: which features?[00:22:13] *** TheBunnyZOS has quit IRC[00:22:56] <derhass_> slime: 4.3 removed glGetPointerv, for example[00:23:14] <derhass_> mostly old cruft which they forgot to remove earlier[00:23:50] *** Waynes has quit IRC[00:26:00] *** Alina-malina has quit IRC[00:26:25] *** Textmode has joined ##OpenGL[00:26:32] *** shintah has quit IRC[00:28:47] *** Alina-malina has joined ##OpenGL[00:28:47] *** Alina-malina has quit IRC[00:28:47] *** Alina-malina has joined ##OpenGL[00:30:44] *** Lemml has quit IRC[00:31:45] *** Demon_Fox has joined ##OpenGL[00:35:16] <CapsAdmine> how can i trigger a glsl program link error?[00:35:21] <CapsAdmine> i want to test some error reporting[00:35:29] <TheLorax> anybody know how to turn on the statistics overlay in bugle?[00:36:46] <Codex_> caps: call a function that doesnt exists[00:36:55] <CapsAdmine> thanks[00:37:29] *** pizthewiz has joined ##OpenGL[00:37:58] <CapsAdmine> hmm that triggers a compile error[00:38:00] <CapsAdmine> undefined variable[00:38:16] <Codex_> you need to forward declare the function[00:38:20] <CapsAdmine> right[00:38:37] <derhass_> just rename main[00:39:12] *** bkre has quit IRC[00:39:33] *** Thrzsh has quit IRC[00:39:55] <bob_twinkles> #define do_science main[00:42:07] <derhass_> the other way around[00:42:58] <bob_twinkles> well that depends on whether or not we are breaking things or fixing things[00:47:49] *** Bloodust has quit IRC[00:48:38] 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##OpenGL[02:07:52] *** paperManu_ has joined ##OpenGL[02:13:07] *** razieliyo has quit IRC[02:15:37] *** hahuang61 has quit IRC[02:24:27] *** centrinia has joined ##OpenGL[02:24:58] *** Crehl has quit IRC[02:25:17] *** rmelo has quit IRC[02:28:09] *** giucam has quit IRC[02:28:25] *** giucam has joined ##OpenGL[02:32:25] *** mayankmadan__ has quit IRC[02:33:02] *** konom has quit IRC[02:34:36] *** paul424 has quit IRC[02:37:29] <foobaz> nvidia launched the new tesla k80[02:37:39] <foobaz> strangely, it uses kepler cores instead of maxwell[02:38:18] <foobaz> but it is a new kepler chip, gk210[02:40:42] *** TyrfingMjolnir has joined ##OpenGL[02:41:56] *** Thrzsh has joined ##OpenGL[02:42:32] *** BitPuffin has quit IRC[02:44:41] *** lahwran has quit IRC[02:46:56] *** lahwran has joined ##OpenGL[02:58:01] *** charlie5 has quit IRC[03:01:34] *** charlie5 has joined ##OpenGL[03:01:54] *** asdtrfygjhknklm has left ##OpenGL[03:07:19] *** b4b has joined ##OpenGL[03:08:09] *** lenarhoy1 has quit 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IRC[06:32:05] *** mat^2 has quit IRC[06:32:28] *** AlexRussia has quit IRC[06:32:31] *** mat^2 has joined ##OpenGL[06:38:42] *** pizthewiz has quit IRC[06:39:02] *** kidnapped_robot has quit IRC[06:39:31] *** delicado has joined ##OpenGL[06:41:25] <delicado> hi can textures and geometry data be combined on a single buffer and able to use them in a single draw call? like a single buffer for the texture and vertex data[06:45:21] *** meoblast001 has quit IRC[06:46:40] *** tcsc has quit IRC[06:48:04] *** iKlsR has quit IRC[06:52:56] *** narcan has quit IRC[07:01:39] *** RoBut1311 has quit IRC[07:09:44] *** karswell has joined ##OpenGL[07:10:45] *** pizthewiz has joined ##OpenGL[07:20:33] <XMPPwocky> delicado: texture coordinates, yes[07:20:44] <XMPPwocky> texture data, probably not[07:25:16] *** delicado has quit IRC[07:28:02] *** DrSkyLizard has quit IRC[07:30:03] *** hahuang61 has joined ##OpenGL[07:40:05] *** shintah has joined ##OpenGL[07:45:33] *** TheLorax has quit IRC[07:48:12] *** Serus has quit IRC[07:49:52] *** centrinia has joined ##OpenGL[07:51:32] *** M-ou-se has quit IRC[07:51:57] *** M-ou-se has joined ##OpenGL[07:53:23] *** TyrfingMjolnir has joined ##OpenGL[07:53:40] *** damir__ has quit IRC[07:56:06] *** zzuegg2 has joined ##OpenGL[07:56:17] *** zzuegg has quit IRC[07:58:23] *** ToreTank has joined ##OpenGL[07:58:45] *** Jack_ has joined ##OpenGL[08:00:26] *** wutata- has joined ##OpenGL[08:00:57] *** Jack__ has quit IRC[08:01:34] *** luxigo has joined ##OpenGL[08:03:06] *** MLM has quit IRC[08:08:58] *** DrBenway has quit IRC[08:09:36] *** Twinklebear has quit IRC[08:15:09] *** puerum has quit IRC[08:16:37] *** Codex_ has quit IRC[08:17:56] *** jbud has quit IRC[08:20:16] *** ToreTank has quit IRC[08:21:25] *** ToreTank has joined ##OpenGL[08:31:31] <neure> hi[08:33:38] <glYoda> "hi can textures and geometry data be combined on a single buffer and able to use them in a single draw call? like a single buffer for the texture and vertex data" …you could but you wouldn't want to[08:35:26] *** Gamecubic has quit IRC[08:35:46] *** Madsy has quit IRC[08:35:48] *** Burga has joined ##OpenGL[08:37:54] *** DrSkyLizard has joined ##OpenGL[08:38:24] *** Beetny has joined ##OpenGL[08:40:21] *** kuldeepdhaka has joined ##OpenGL[08:40:49] *** Jack__ has joined ##OpenGL[08:43:10] *** Jack_ has quit IRC[08:47:38] *** damir__ has joined ##OpenGL[08:53:52] *** pizthewiz has quit IRC[08:55:29] *** Sirolf has joined ##OpenGL[09:09:11] *** robot-beethoven has quit IRC[09:09:14] *** Chais has quit IRC[09:09:36] *** Sirolf has quit IRC[09:10:48] *** Chais has joined ##OpenGL[09:11:30] *** clauswitt has joined ##OpenGL[09:12:52] *** Textmode has quit IRC[09:15:54] *** Textmode has joined ##OpenGL[09:19:48] *** TheBeerinator has joined ##OpenGL[09:27:07] *** PasNox has joined ##OpenGL[09:27:24] *** ocharles has quit IRC[09:28:12] *** ocharles_ has joined ##OpenGL[09:31:24] *** luxigo has quit IRC[09:36:23] *** luxigo has joined ##OpenGL[09:37:49] *** CrizMobius has joined ##OpenGL[09:45:23] *** linuxuz3r has quit IRC[09:46:40] *** hexagoxel_ has joined ##OpenGL[09:47:16] *** anton02 has joined ##OpenGL[09:47:22] <anton02> how do you convert an isometric image coming from 4 differently positioned cameras to a top-down image?[09:47:32] *** narcan has joined ##OpenGL[09:50:09] <Bloodust> take all the surfaces that point upwards and remove everything else?[09:56:43] *** Jeanne-Kamikaze has joined ##OpenGL[09:59:59] *** Garner has joined ##OpenGL[10:00:04] <anton02> i mean jpg image[10:01:03] <magicthing> nice my irclogs don't go as high to read what the latest response to my question was :F could someone do me a favour? :F[10:02:55] <Bloodust> anton02 magic?[10:03:23] *** jdolan has quit IRC[10:05:22] <hdon> hi all :) got a weird question![10:06:17] <hdon> in OpenGL 2.1, if i want to use VBO, can i still use fixed-function rendering pipeline?[10:06:36] <slime> yes, if you really want[10:06:38] <hdon> and if so, how do i glVertexAttribPointer? where do i get the attribute index?[10:06:38] <Bloodust> sure[10:06:53] <Bloodust> you can use the old pointer functions[10:06:56] <hdon> or are there other functions like glVertexColorPointer[10:06:57] <Bloodust> vertexpointer etc.[10:06:59] <slime> you'd use glVertexPointer/glColorPointer/etc. rather than glVertexAttribPointer[10:06:59] <hdon> ahh[10:07:13] <hdon> thanks :) my friend has really old GPU, i'm trying to help him speed up his program..[10:07:26] <Bloodust> probably wont help[10:09:39] *** mat^2 has quit IRC[10:11:29] *** narcan has quit IRC[10:12:42] *** BitPuffin has joined ##OpenGL[10:14:21] *** delicado has joined ##OpenGL[10:20:44] *** erhan_ has joined ##OpenGL[10:26:02] *** rmelo has joined ##OpenGL[10:32:23] *** rmelo has quit IRC[10:36:22] *** delicado has quit IRC[10:36:52] *** mat^2 has joined ##OpenGL[10:37:33] *** Textmode has quit IRC[10:38:57] *** luxigo has quit IRC[10:40:03] *** Khlorghaal has joined ##OpenGL[10:45:38] *** redeemed has joined ##OpenGL[10:46:24] *** hahuang61 has quit IRC[10:46:46] *** BreadProduct has joined ##OpenGL[11:02:24] *** AlexRussia has joined ##OpenGL[11:02:36] <anton02> Bloodust: this is what i mean http://i.imgur.com/Q71gCHg.png[11:03:15] *** DiffuseStorm has joined ##OpenGL[11:06:42] <Bloodust> okey[11:07:00] <Bloodust> I dont know how to achieve such magic[11:07:45] <Hunts> anton02: that's done with computer vision algorithms[11:07:50] <Hunts> check the book where that image comes from ;)[11:08:10] *** Lemml has joined ##OpenGL[11:09:56] *** ToreTank1 has joined ##OpenGL[11:10:51] *** TyrfingMjolnir has quit IRC[11:10:53] *** ToreTank has quit IRC[11:14:23] *** ToreTank1 has quit IRC[11:15:11] *** doev has joined ##OpenGL[11:16:15] <DiffuseStorm> I'm making a small gui library using OpenGL. If a widget has its own coordinate space, 0 to widget's width and height, and is located somewhere within the window, how can I use OpenGL to help me with this and to clip any data that goes outside of it? I'm thinking a matrix to map from the 0-width/height range to -1 - 1. And a glViewport to set the rendered image to the correct place in the window? Do I understand glViewport corr[11:16:15] <DiffuseStorm> ectly?[11:16:22] *** ToreTank has joined ##OpenGL[11:17:58] *** snakenerd has joined ##OpenGL[11:17:59] <AbiBuccaneer> DiffuseStorm, yes, that should work - as the docs say, "glViewport specifies the affine transformation of x and y from normalized device coordinates to window coordinates."[11:18:24] <Bloodust> well, opengl clips everything that doesnt fit your screen automatically[11:18:54] *** narcan has joined ##OpenGL[11:19:06] *** Waynes has joined ##OpenGL[11:19:35] <AbiBuccaneer> yeah, using glViewport, the normalized device coordinate boundaries of your widget will be [-1..1]^2, and anything outside the viewport will be clipped - so it does what you want[11:19:53] <DiffuseStorm> okay great[11:20:59] *** Tag_ has joined ##OpenGL[11:21:42] *** bjz has joined ##OpenGL[11:22:50] *** konom has joined ##OpenGL[11:23:09] *** Demon_Fox has quit IRC[11:24:07] *** delicado has joined ##OpenGL[11:24:10] <delicado> in game engines like the cryengine, does it do texture swapping in each frame? i mean when i look at the sample demo i see high resolution textures in each object, probably 2048x2048 or maybe 4096x4096. when you have a bunch of these HD textures you can easily exceed the amount of video ram your pc or console have. so how does cryengine does it?[11:24:55] <Bloodust> it streams textures in an out every once in a while[11:25:06] *** hexagoxel_ has quit IRC[11:25:42] *** Lucretia has quit IRC[11:26:37] <delicado> Bloodust: so can you render and stream textures simultaneously? i think i have read about this[11:27:02] <Bloodust> sure[11:27:20] <Bloodust> you can, for example, use PBOs for asynchronous texture streaming[11:29:13] *** BitPuffin has quit IRC[11:29:32] *** Hunts has quit IRC[11:30:19] <delicado> okay this is cool, got to play with PBOs now[11:31:16] <Bloodust> the basics are pretty simple[11:31:30] <Bloodust> but it gets difficult real fast after that[11:35:28] <delicado> ohh it will be easy[11:36:13] *** Match has joined ##OpenGL[11:40:09] *** Folkol has quit IRC[11:44:33] *** anton02 has quit IRC[11:54:49] *** indefini has quit IRC[11:58:43] *** hexagoxel has joined ##OpenGL[12:04:59] *** Zupo has quit IRC[12:07:18] *** GargantuaSauce has quit IRC[12:07:59] *** mm765 has joined ##OpenGL[12:10:44] *** clauswitt has quit IRC[12:19:45] *** Jeanne-Kamikaze has quit IRC[12:20:21] *** Burga has quit IRC[12:23:26] *** snakenerd has quit IRC[12:26:13] *** charlie5 has joined ##OpenGL[12:28:47] *** snakenerd has joined ##OpenGL[12:31:45] *** asido has joined ##OpenGL[12:32:31] *** clauswitt has joined ##OpenGL[12:39:09] *** GargantuaSauce has joined ##OpenGL[12:44:06] *** zzuegg2 has quit IRC[12:45:17] *** zzuegg has joined ##OpenGL[12:52:48] *** doev has quit IRC[12:53:37] *** AlexRussia has quit IRC[12:55:28] *** doev has joined ##OpenGL[12:56:16] *** AlexRussia has joined ##OpenGL[12:57:50] *** indefini has joined ##OpenGL[13:00:02] *** Lucretia has joined ##OpenGL[13:01:18] *** AlexRussia has quit IRC[13:03:47] *** TyrfingMjolnir has joined ##OpenGL[13:04:00] *** doev has quit IRC[13:04:38] *** Lucretia has quit IRC[13:04:38] *** Lucretia has joined ##OpenGL[13:06:16] *** doev has joined ##OpenGL[13:07:21] *** samrat has quit IRC[13:09:26] *** TunnelCat has joined ##OpenGL[13:09:40] *** bjz has quit IRC[13:10:33] *** TyrfingMjolnir has quit IRC[13:10:41] *** asido has quit IRC[13:12:17] *** bjz has joined ##OpenGL[13:13:03] *** asido has joined ##OpenGL[13:13:13] *** snakenerd has quit IRC[13:14:00] *** BitPuffin has joined ##OpenGL[13:15:27] *** shintahW2 has joined ##OpenGL[13:16:36] *** boblehest has joined ##OpenGL[13:17:00] *** Syzygy_ has quit IRC[13:17:57] *** shintahW has quit IRC[13:17:57] *** shintahW2 is now known as shintahW[13:18:12] *** boblehest_ has quit IRC[13:20:38] *** paperManu_ has joined ##OpenGL[13:24:11] *** TyrfingMjolnir has joined ##OpenGL[13:28:08] *** Tag_ has quit IRC[13:28:08] *** clincher has quit IRC[13:29:44] *** clincher has joined ##OpenGL[13:31:43] *** TyrfingMjolnir has quit IRC[13:31:46] *** Langdal has joined ##OpenGL[13:32:45] *** TyrfingMjolnir has joined ##OpenGL[13:32:58] <Langdal> Hi. What happens if I try to use a uniform value without it being explicity set? Also is there a way inside the shader code to check whether the uniform is set?[13:34:52] <Adrinael> If not changed, they're zero[13:35:14] <Adrinael> You can't tell from the shader if the application has set it[13:35:32] <AbiBuccaneer> https://www.opengl.org/wiki/Uniform_(GLSL) "Uniforms are intended to be set by the user. However, you can initialize them to a default value using standard GLSL initalizer syntax:"[13:35:45] *** Codex_ has joined ##OpenGL[13:35:45] <Adrinael> You can initialize -- oh I'm slow[13:37:07] *** mayankmadan has joined ##OpenGL[13:37:08] *** TyrfingMjolnir has quit IRC[13:37:45] <dawik> i thought changing a uniform generated an error[13:37:55] <dawik> attempting to change it*[13:38:07] <neure> does android GLES wrap extensions that dont show up in ndk gl2ext.h?[13:38:11] *** TyrfingMjolnir has joined ##OpenGL[13:38:21] <Adrinael> dawik, by change I mean calling glUniform*()[13:38:30] <neure> their gl2ext.h is dated 2010-04-09[13:38:53] <neure> and there are extensions which are not covered by that version of gl2ext.h[13:39:53] *** ablepharus has joined ##OpenGL[13:40:17] *** snakenerd has joined ##OpenGL[13:42:08] *** Beetny has quit IRC[13:43:36] *** BreadProduct_ has joined ##OpenGL[13:44:10] <neure> or alternatively, would someone have list of extensions supported by some recent GLES device?[13:44:23] *** snakenerd has quit IRC[13:44:46] *** TyrfingMjolnir has quit IRC[13:47:21] *** BreadProduct has quit IRC[13:47:23] *** BreadProduct_ is now known as BreadProduct[13:48:11] <AbiBuccaneer> neure, gfxbench is your friend - http://gfxbench.com/device.jsp?benchmark=gfx30&os=Android&api=gl&D=Samsung+Galaxy+S5+%28SM-G900%2C+SM-G900x%2C+SC-04F%2C+SCL23%29&testgroup=info[13:48:19] <AbiBuccaneer> expand the "3D API" field[13:49:45] <neure> i see[13:50:17] <neure> so the answer is that this device for example reports extensions which are not supported by latest/any gl2ext.h in android ndk[13:50:38] <neure> which means.. I should use gl2ext.h from khronos and not from android ndk... right?[13:51:14] <Langdal> Adrinael, so If I have a uniform vec3 it's automatically initialized to something like a vector of 3 zero-values while an int is initialized to just 0 ?[13:52:43] *** jubei has joined ##OpenGL[13:55:21] *** paul424 has joined ##OpenGL[14:02:13] *** luxigo has joined ##OpenGL[14:06:38] <Adrinael> Langdal, aye[14:09:55] *** xissburg has joined ##OpenGL[14:13:29] *** zzuegg has quit IRC[14:14:06] *** zzuegg has joined ##OpenGL[14:14:45] *** zajfy has joined ##OpenGL[14:16:28] *** kuldeepdhaka has quit IRC[14:16:52] *** delicado has quit IRC[14:16:56] *** paperManu_ has quit IRC[14:17:57] *** slidercrank has joined ##OpenGL[14:21:32] *** razieliyo has joined ##OpenGL[14:26:08] *** shintahW has quit IRC[14:28:46] *** moser has quit IRC[14:31:42] *** DrSkyLizard has quit IRC[14:34:33] *** centrinia_ has joined ##OpenGL[14:34:43] *** centrinia_ has quit IRC[14:36:03] *** shintahW has joined ##OpenGL[14:40:17] *** mayankmadan_ has joined ##OpenGL[14:40:19] *** DolphinDream has joined ##OpenGL[14:41:26] *** mayankmadan has quit IRC[14:41:50] *** kuldeepdhaka has joined ##OpenGL[14:46:00] *** moser has joined ##OpenGL[14:47:22] *** FrodoTheHobbit has quit IRC[14:50:40] *** tehrain has joined ##OpenGL[14:50:44] *** DolphinDream has quit IRC[14:52:01] *** urraka has joined ##OpenGL[14:53:30] *** jubei has quit IRC[14:54:38] *** narcan has quit IRC[14:57:00] *** paul424 has quit IRC[14:57:48] *** Zupo2 has joined ##OpenGL[15:14:30] *** DolphinDream has joined ##OpenGL[15:17:22] *** Drakon has quit IRC[15:17:58] *** telex has quit IRC[15:18:39] *** telex has joined ##OpenGL[15:20:52] *** jubei has joined ##OpenGL[15:21:31] *** Zupo2 has quit IRC[15:21:40] *** Zupo2 has joined ##OpenGL[15:22:10] *** centrinia has quit IRC[15:35:16] *** Zupo3 has joined ##OpenGL[15:37:02] *** jdolan has joined ##OpenGL[15:38:17] *** Zupo2 has quit IRC[15:41:57] *** xissburg has quit IRC[15:43:13] *** mayankmadan__ has joined ##OpenGL[15:43:38] *** xissburg has joined ##OpenGL[15:44:19] *** erhan__ has joined ##OpenGL[15:45:17] *** mayankmadan_ has quit IRC[15:45:36] *** FrodoTheHobbit has joined ##OpenGL[15:47:35] *** Zupoman has joined ##OpenGL[15:50:17] *** FrodoTheHobbit has quit IRC[15:52:50] *** lasserix has joined ##OpenGL[15:52:58] *** DolphinDream has quit IRC[15:57:21] *** b4b has joined ##OpenGL[15:58:44] *** b4b has quit IRC[15:58:55] *** Drakon_ has joined ##OpenGL[15:58:56] *** snakenerd has joined ##OpenGL[15:59:48] *** Drakon_ is now known as Drakon[16:05:34] *** clauswitt has quit IRC[16:07:04] *** Keniyal has joined ##OpenGL[16:07:45] *** karab44 has joined ##OpenGL[16:08:37] *** damir__ has quit IRC[16:09:49] *** Madsy has joined ##OpenGL[16:11:10] *** gregor1255 has joined ##OpenGL[16:13:07] <gregor1255> hi, I'm thinking about making an oscilloscope. I guess I would capture audio and once I captured enough (depending on sample- and framerate), I'd render that into a frame that would then be displayed[16:13:40] <gregor1255> is opengl any good at this? (just displaying pre-rendered frames)[16:14:36] <dawik> I dont see why not[16:15:30] <tehrain> I do it for precisely that[16:20:02] *** M-ou-se has quit IRC[16:20:37] *** M-ou-se has joined ##OpenGL[16:21:16] *** wutata- has quit IRC[16:21:17] <AbiBuccaneer> gregor1255, it works okay for that, but you may find that however you're currently rendering your frame could be improved with OpenGL :)[16:22:10] *** M-ou-se has quit IRC[16:22:33] <gregor1255> AbiBuccaneer: I haven't started coding yet, I just wanted to find out which graphics library is a good idea for my purposes.[16:23:04] *** M-ou-se has joined ##OpenGL[16:27:31] <gregor1255> anyway, thanks, sounds like opengl with do fine.[16:28:04] <gregor1255> *will[16:37:26] *** erhan__ has quit IRC[16:38:29] *** Gamecubic has joined ##OpenGL[16:41:09] *** razieliyo has quit IRC[16:45:43] *** gregor1255 has left ##OpenGL[16:48:38] *** Garner has quit IRC[16:52:06] *** Thrzsh has joined ##OpenGL[16:52:38] *** pizthewiz has joined ##OpenGL[16:54:08] *** damir__ has joined ##OpenGL[16:56:53] *** DapperPixpy has joined ##OpenGL[16:59:16] *** CrizMobius has quit IRC[17:00:44] *** MiniCow has joined ##OpenGL[17:03:01] *** slidercrank has quit IRC[17:03:53] *** Waynes1 has joined ##OpenGL[17:05:22] *** Waynes has quit IRC[17:06:21] *** Keniyal has quit IRC[17:11:14] *** slidercrank has joined ##OpenGL[17:12:09] *** lasserix has quit IRC[17:12:24] *** Ad1_RN has quit IRC[17:12:38] *** Ad1 has joined ##OpenGL[17:12:40] *** lenarhoyt has joined ##OpenGL[17:12:44] *** Thrzsh has quit IRC[17:14:08] *** DolphinDream has joined ##OpenGL[17:18:48] *** DolphinDream has quit IRC[17:20:47] *** PasNox has quit IRC[17:25:36] *** ManDay has joined ##OpenGL[17:30:50] *** Garner has joined ##OpenGL[17:33:47] <lenarhoyt> if I want to transform a normal only with the model matrix I have to use the inverse transpose too, right?[17:34:24] *** erhan__ has joined ##OpenGL[17:34:49] *** redeemed has quit IRC[17:34:49] <lenarhoyt> so n' = inverse(transpose(model)) * vec4(nx, ny, nz, 0); n'' = n'.xyz / n'.w; ?[17:36:54] *** erhan__ has quit IRC[17:38:46] *** DolphinDream has joined ##OpenGL[17:38:58] *** pizthewiz has quit IRC[17:39:46] *** kriskrop1 has quit IRC[17:42:39] *** kriskropd has joined ##OpenGL[17:49:07] *** clincher has quit IRC[17:49:18] *** staylor has joined ##OpenGL[17:50:35] *** clincher has joined ##OpenGL[17:53:59] <ClaudiusMaximus> lenarhoyt: inverse transpose of the 3x3 top left part, normals don't have w[17:54:46] *** Codex_ has quit IRC[17:55:19] *** pizthewiz has joined ##OpenGL[17:55:21] <lenarhoyt> ClaudiusMaximus: is that the same as setting the w component of the normal to 0?[17:55:43] <lenarhoyt> *isn't[17:57:05] <lenarhoyt> oh, w remains 0, so I don't need to de-homogenize it?[17:57:33] <ClaudiusMaximus> don't know[18:08:17] *** jubei has quit IRC[18:08:21] *** Jack__ has quit IRC[18:19:19] *** ablepharus has quit IRC[18:23:27] *** Serus has joined ##OpenGL[18:26:11] *** doomlord_1 has 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has quit IRC[21:50:20] *** telex has quit IRC[21:51:05] *** hdon has quit IRC[21:52:36] *** telex has joined ##OpenGL[21:55:49] <roboman2444> anyone got any precautions for transferring from a glReadPixels sort of deal to a PBO based one?[21:57:55] *** MiniCow has quit IRC[21:59:12] *** davidveiga has joined ##OpenGL[22:02:40] *** snakenerd has quit IRC[22:03:19] *** staylor has quit IRC[22:04:16] *** Garner has joined ##OpenGL[22:07:53] *** Keniyal has joined ##OpenGL[22:09:34] *** linuxuz3r has joined ##OpenGL[22:11:54] *** Garmine has quit IRC[22:16:26] *** clauswitt has quit IRC[22:18:57] *** Garmine has joined ##OpenGL[22:19:21] *** Garmine is now known as Guest16173[22:19:38] *** Guest16173 has quit IRC[22:28:06] *** qeed has joined ##OpenGL[22:33:14] *** BitPuffin has joined ##OpenGL[22:33:47] *** Plasmastar has joined ##OpenGL[22:36:31] *** jdolan has quit IRC[22:36:31] *** BlackPhoenix is now known as BlackFox[22:37:24] *** HuntsMan has joined ##OpenGL[22:39:24] *** doomlord_1 has joined ##OpenGL[22:46:03] *** doomlord_1 has quit IRC[22:48:31] *** Zoishima has joined ##OpenGL[22:48:38] <Zoishima> Hi all[22:49:16] *** asido has quit IRC[22:49:31] <Zoishima> has anyboy idea why I have betters FPS result when I not use VBO in my game?[22:49:37] <Zoishima> *better[22:50:10] <Codex_> move some opengl calls outside of frame loop[22:50:13] <slime> poor use of buffer data functions[22:50:24] <slime> (it's easy to do that poorly)[22:50:39] <Zoishima> I only use bufferdate once time at loading[22:51:01] <Zoishima> I have a BSP Quake3 map with 10k of faces[22:51:05] *** abs25 has joined ##OpenGL[22:51:12] <Zoishima> and I have build a VBO for each face[22:51:31] <Zoishima> and I have better results when I process it not using VBO[22:51:53] <Codex_> how many vbos you have total?[22:52:10] <abs25> I got a question, I am using java and libgdx library, I want to use shaders, as far as I udnerstand I can only use GL 2.0 ES so that it is compatible with android, but I do not know in what I can write GLSL, in what editor? and where to start learning?[22:52:11] <Zoishima> 10K of VBO ( one per face )[22:52:23] <Codex_> that sounds like a problem[22:52:39] <Codex_> usually you put 10k vertices on the same vbo[22:53:16] <Guest74884> do VBOs have a lot of overhead?[22:53:23] <Zoishima> I have between 4 and 6 vertices per face[22:53:39] *** Guest74884 is now known as phillipw[22:54:02] *** slime has quit IRC[22:54:16] <Codex_> the problem is that you'll have large number of draw() calls, when there should be just a few[22:54:30] *** absof25 has joined ##OpenGL[22:54:30] <foobaz> phillipw: VBOs are very fast to use but very slow to modify[22:54:49] <phillipw> ah[22:55:01] *** absof25 has quit IRC[22:55:07] <Zoishima> Codex_, but it have no sense tha I have better results without use it[22:55:21] <TheBunnyZOS> <_<[22:55:34] <foobaz> ideally you only want to upload new VBOs when you load a new level or model[22:55:52] <TheBunnyZOS> you could put the ENTIRE level in 1 VBO Im betting[22:55:53] <foobaz> sometimes you have to change them during the game but you definitely shouldn't do it every frame[22:56:37] <Zoishima> thanks for your time[22:56:37] *** doomlord_1 has joined ##OpenGL[22:56:43] *** Zoishima has quit IRC[22:56:54] <TheBunnyZOS> WTF[22:57:18] *** ManDay has quit IRC[23:02:52] *** Madsy has quit IRC[23:02:53] <abs25> guys :/ ?[23:04:12] *** foreignFunction has quit IRC[23:04:45] <HuntsMan> abs25: any text editor[23:05:10] <abs25> but I dont know definitions of functions and stuff[23:05:32] <abs25> do you all write it without all the fancy IDE features?[23:05:37] <HuntsMan> uhm yeah?[23:05:59] <HuntsMan> you can read tutorials to familiarize yourself[23:06:01] *** DolphinDream has quit IRC[23:06:02] <HuntsMan> look into the topic[23:06:14] <abs25> what is the best place to srat with?[23:06:17] <abs25> start*[23:07:47] <Stragus> You don't need any special IDE or editor to write GLSL, like any other programming language[23:08:24] <abs25> ok, so where should I start, with what tutorials?[23:09:12] *** ToreTank1 has joined ##OpenGL[23:09:35] *** Shockk has joined ##OpenGL[23:10:21] <Stragus> abs25: I'm not sure what the best GLSL tutorials are these days, let me have a quick look..[23:10:36] *** pizthewiz has quit IRC[23:10:53] <Stragus> In any case, that should be pretty good: https://www.opengl.org/sdk/docs/tutorials/TyphoonLabs/[23:10:56] *** Shockk has left ##OpenGL[23:11:12] <abs25> thank you for your help Stragus[23:11:34] *** Match has quit IRC[23:11:40] *** ToreTank has quit IRC[23:11:46] <Stragus> Something that gets into code faster would still be good, there's nothing too complex about GLSL[23:12:10] <abs25> seems very complex to me[23:12:13] <abs25> I just started[23:12:28] <abs25> and most confusing part is that I cant see syntax errors while writing them :/[23:12:40] <Stragus> It's pretty much like C code[23:13:10] <abs25> yeah, I can see that[23:13:22] <Stragus> That seems okay: http://zach.in.tu-clausthal.de/teaching/cg_literatur/glsl_tutorial/[23:13:47] <abs25> so shader is like a seperate program?[23:13:54] <abs25> it doesnt matter what my game runs on basicly?[23:14:11] *** pizthewiz has joined ##OpenGL[23:14:25] <Stragus> A shader is a tiny bit of code that you want to run per-vertex or per-fragment[23:15:01] <Stragus> Basic examples: a vertex shader multiplying the vertex by your modelview*projection matrix, and a fragment shader multiplying some color by a texture[23:15:38] *** hdon has joined ##OpenGL[23:16:46] <abs25> how do I define vertexes?[23:16:52] <abs25> or even better[23:16:58] <abs25> how do I define part of the screen to run shaders on?[23:17:15] *** jdolan has joined ##OpenGL[23:17:48] <Stragus> That's not how it works[23:18:23] <Stragus> You bind vertex&fragment shaders, every vertex you send will run your vertex shader, and every fragment from these triangles will run your fragment shader[23:19:10] <abs25> oh[23:19:12] *** jdolan has quit 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