textures or shader _i'm not quite sure
I have come to a dead end in my understanding – which isn’t to much of a stretch since I’m relatively new but I was hoping someone could point me in the right direction.
Essentially I’m trying to create a glow/soft bright light or halo type effect for a 3d object. But I’m confused as to whether the answer to this lies in the glsl Shader or the objects texture. Or more likely – a combination of both.
I have read with great interest vade’s and andrews post on opengl shaders but can’t quite see if they are actually the answer to my question.
I also came across a great combination shader that created a bloom type effect and rendered it to a video plane via jit.gl.slab. I attempted to use this texture as the texture for a 3d object – which worked but didn’t have any of the luster of the 2d / video plane version.
I’m not sure whether this is because of lighting or other environmental settings – or because a texture is never going to be a source of luminescent values.
Another thought was, alpha values might help in this regard – but again I wasn’t sure which part of the chain to apply this too.
I hope this makes some sense – and any help is much appreciated.
see if this helps clarify. post back some questions if it doesn’t.
----------begin_max5_patcher---------- 2909.3oc6bs0iihiE94p9UXEsOrqTpLXy8QiVUyJsutOrSq8ktGUxAbRb2Db Fvo5plQy+8w2nBj.DBPnRup6VUHFHvwemK9bN9X+G2e2rkrWH4y.+H3if6t6 Ot+t6TmRdh6Lsua1V7KQI3b0sMKhscKIkOat9ZbxKb04oq.ux1CVS3.LX49z nM.1J.IKikkOGvydEjQdflR4TbB82ooqA7Mzbf72uOiT73RnojH19T0yDYNY 59sr87DBWQAVlythkxyo+NQdNn0hhSSiUjCa4me.5Oqz8lh2pt2Y+ORVLNEW bscXdzFA87TFIhqQBaO4yC.g5Ct9xC1vEVfe8.IQSKnHn7b+482K+XdGgwTx WEj3InXLIA+pn6XYMq1NOr8Nu9N4utin6HyVhSWO6MptD13zWrwAo.EGe0AO OEBEVBZ1PiiIokI1JfEpGfUSxb+zCO.9OLN4GAeXCAvRSdUJToDsvbfP5BGw 2iSDmdIQd5XZ9NA9RhAbl3dHfuRSiYeUdmxVOSiILwMjdcDGc75q3XfBqQZw Qji63KNxYqWmPZWl6DgKpDWpS1xosNCpRm4sOGu9xVRdNdM4DoERJdYBA72f iipU8ccTe4wFjvVqVoM732DrL1JQ+WRZLIC7AF3CZ6wK9T5OuamPw4ekvXaA +6UqDTpPcguA7KI3k4WGEDqdBdtHigZ8AO33qfzD58KavRj6gG9myFXuGEzW KxZYFWKsni+IVjuZcdonyGpN.du688d7nP83Q1UDABmfwp+LkuXcxhM3zXgY kkrruTOHftTCKyav3BxsmXjd7CiWMgdiOB0jI2bs1g7vqWQqtHmg4Liw9gev 3a0sIjIifiAaw7E61vRWuHZ8hO+R90Dhr6qsUqxVWfHmwGiZW+xHCI0u.OJI 71DmpSWKrYnR7JdRvDxnuzrRGbf.WwXSdsCbiugISnUWnkoyfVqSd5sP1ZBw 56v31ULkGZMY.Vlz8eUnRcVAL7B0+fgCCTLw.3dF0Oqw1DkHjoMj7EaYOeEM NAq298OmQwIsY81oLzDngFuIxxzuwkfBkH8bWDSl03L1eGLHA85EXUnbYxoA T4iLL3+Oztr6s1kYXM6ql1UCfRBCGOZXRiY4wt2Y.SqYAMi8eBrblj7.GUyP 4D9bPbFVBjxvPifUahp1ztZSmqnXGbXvafNwhHj1CgIzmpuPDzjwmpH7NkeB hiihaBMZ4xNXPvUgoKWqo1Sp0YzXgSm6HFDS+cNKaeN3wD55MbI8ZxuDTb8H r3KVKre6uGiXIrLfk3+P4crikS4TVp3ht5+.Oh2yYBa+zHYCkitGjc6PdVFe WessGD+xUynr0sPAu27qn8KIWJ6Bp9qJ65gl4W1uu7KmgwufHs4H+uU4WvS3 WOzt9E58ke4NL6g9deyyurpie0hBF78kg4MLFlIdkomgcXlsLbLdFNMeEKa6 SJ2q.nIKcJCzScjqYFirdOSmRg3HdG3wX5VfmiEvIvZJyxhs0.C4w.jvoKuT 6.Kkylz3jHgifoZgHz.gHey3hmIg4kePjLCtX.Fw6llPdljkKLuU5tuaVo7X ni6zNTk+YOc4F334b3EJ.70IrnuPhKMqJ2MKlr5xdJrcjzC+BUuqxGUuSZ5N o0gTNlaH9xuY79D9S0yspd8U3HRi+3F3J2MSNFCKURFU9spgdLuvOBLQDTgx U2QJdWM+XNikrDm8LMmJFZpB2PHPiSoBiWDNUSQBSLEWjtcWFUOTyamaKgii wbrlPJwnJWPMkjCpnzT47Go7nkzKvgFmSsSl7zx+hZSGsRdnvJZwmuQ3MIVq tPwD.JeYyJNsxnf9Ky6YeU81ZtqVlD5pAfSFvoi3RWgEqI.VpNeqGUECuHF6 NhC1H7yR4qUNXetr3VR1uE+Exqf+tt4RZJN6UfPGdOGrkESlCvowfL4OwbVZ tvfLN5KfkuBL5j+ixuyJ9XY2IAxZGi6jLXVgmzlUflR7qqqN6k5IryMTa3qU o4Ih8rLYe1arh23Q.CWS5hqpHJhvBmhikEhzWYfc3LNXMdedNEmBDiWvECWL ILB6AxHJpZEe+RSN3sAi3SyxYq3oj77OMSVIhFdRivJZDgUmgJeC0IhVarN7 jvEttn5pDl3Y2rU4xHkfDnaE2rDlVzMfRDdfJfP8uIrzUVtVEVXgyIAdh+4O u1uAOBLNYzAQm.ykNOWI235bWKkQp9l7sbCBlW62N9MUlO6NX9r1NlstfkbO 1S7qKetZB2OxUcbFdKXkvD0g5k6LCP2LGu4jo23baMTD00VUPGtGmX8FRt9D XOhyRHhftiH.blvlivxONSVrzIRhQd9Iwxj+PM3W3w86hkoVw2ifSYI9V3qz JVFPNv7j.wACDhQVtkfXnE71AiooQYDbN4GhI5u.HpBCc1HBegCD97TZ9nvl JWoqK5UIyGmNiuRSthQTlNCpuUKN8VgWKMhPJer0f6zAme2UjN5JBBNXqNd2 zthHceeRcEAgFID03JRvz5Jx20b5pli8H4RzsplivwyoUwwYj.Tshi22UbtQ UbFZzuZSh1VA2l5M3sxnClVUGuwARqT.0SllSK99VT1YI3kl4OUNqXfH1Bbb LkSelTZ4ObFktK.naYpTab8G0Wn2TrSEdHacdw42cr2jRTIzCdrjaVvEEMki cXsvonIM8YRFWUvFp1l4X.1i3pm.NZvH4.WPndVgrOef3nobVFzFnFwXuQCM 1aa2.MToh5NH36AKdSNxs8XkT.WUAC5DdyjikR15VnlPMuWJu7mFugv63jOa ORgki70kH9oEqS2rAcn7Djlman7DTud40qmGjy1mEUz+KbzGTkPhI4bwXBEk KxGOXI9na7v5GvphVY7NFMkmWDHP3BWY2UaUQ3ISQKvu1I4oKtGgtx8nqDcK m1jqJc6fblXNw2lLhZHm5oaoggaI5tyBP92Vz82njseGoamaJxtFg1Vfa3sC cacIZk2Nzsr9B5DcWi8+2Uwa6tJmbaIei5rbh0sEc2Y8RzsEc2U4azXJeaNo nCnKa6b7yj3mzqVzmvbQXdK2y09HWoLt6ckL2kZjttq25Cs0BrdcBaINwTO5 u8Hlc+AjXjVatq1mjjGkQHoWz1p0Eu4Izy53WuWHUrmZEL9qx1QcaSC05lIR odBzs8dxHtjMxIIfCaMSCZcsnWs6MsZV5IGNDoWMP5sDOuIauo4PkjdDnXeY fhTVXdkC0tqx06sflRnii0js4FHSCiYqUTmw4XxN9lk6WshjoVPfBfYTWyTs Ja4NLzyb3ba7QioRW6aXFVshMk538c0J5qSnmmR2x0dpWncY5MivQaaKpUgC +AIb.0a5L58wgwEijfwpc4q2SutaJCA8Z2jAZoUGP1G1tJsgK7BPNt1WcAEN Xo3+jLYEHtrd3woexHEGUO6SRCeYbKbPBN5Jm06Jr1KGUWRfVmsm33Mwtj7a aI7LF.Ycc25bfvAwf0Ir20u6djntip4mWiRGGVkAqNMMGgkiRpSgtdZXT0GB 0IbtNSSVcglPSJM0EXxexoHzMEEY62E9FrAZBVOMYqlNGy1efoQfSwbHzeZE 1EZMXRwOXWj6gvokl5BNENshYcfhtPiCxELgqzeckTldogpZLPRE0EF5kQp5 g+M6m6lF1VClRCKmD6FnTuIkM6zEEzKihB0KKF8Vmlogk+nfc1mgRmXKIcA7 fWH+zwQY80wj2jvCsFJ0FdEn1gRSdcwJyz5WDpS9E4bYzjgO5FDbvk7pMrJM zq6Hntf5jA7ocXNTmr1bglabPZLyr4oq2WXpzPGGjAZc7FNz5d64UiSWfVmo 0ad6tLvLZZcqw4Fjl5hyet2dwX.c5ULFZepLCyoZMEDKxd.Dqsd0pWskimwv sdDZug2Qb5TG4BQ8o.bc7uRfqw19ofqnwed+eA.5vQEE -----------end_max5_patcher-----------
Thats really perfect, thanks exactly what I was talking about.
Its brought up some really interesting questions for me though. I’m quite confused!!
I’m intrigued as to how you can have a 3d scene within a video plane – I thought it was a 2d concept.
So is the texture you are sending to the bloom computation the 3d sketch created elsewhere in the page? I notice the similar name ‘cap’ on their attributes but I am unfamiliar with the @capture attribute associated with jit.gl.sketch object. Speaking I couldn’t find reference to the attribute in the help file, the jit.gl.sketch reference page, or the ob3d reference page. Is there a reference somewhere else?
Finally, I was getting a lot of errors originally when I loaded the patch. This was fixed when I enabled the videoplane before firing up the patch. Any idea as to why this occured?
Thanks again for the example , This incapsulation sort of thing must enable an incredible amount of possibilities.
> I’m intrigued as to how you can have a 3d scene within a video plane – I thought it was a 2d concept.
this is the "Render To Texture" or "RTT" concept. google is your homeboy.
> So is the texture you are sending to the bloom computation the 3d sketch created elsewhere in the page? I notice the similar name ‘cap’ on their attributes but I am unfamiliar with the @capture attribute associated with jit.gl.sketch object. Speaking I couldn’t find reference to the attribute in the help file, the jit.gl.sketch reference page, or the ob3d reference page. Is there a reference somewhere else?
oddly enough, it looks like capture is not in the reference page. don’t know why that is. basically you give a 3D gl object’s capture attribute a named texture to render itself to. the 3d obj then no longer renders to the window, but instead render’s to the texture object. search the forum for "capture" and "texture". also study andrew benson’s jitter recipes.
> Finally, I was getting a lot of errors originally when I loaded the patch. This was fixed when I enabled the videoplane before firing up the patch. Any idea as to why this occured?
yeah, that’s what i was trying to comment about in the patch. hopefully some of these texture initialization issues will get resolved in a future update.
also note, there is another tricky thing going on in that patch. the gridshapes are not drawing themselves at all (either to the window or to the texture). instead they are named, and then the gl.sketch object draws them with the "drawobject" command.
thanks again Rob, lots to be looking into. nice
Someone tryed to apply this shader to a 3d object with jit.gl.model? I´m trying to apply some "glow" effect to a .obj with no success… any ideas?
Wow, so fast¡
Thank you Wesley, that´s the other patch i´ve trying; it works perfectly, but I need the object to be rendered with jit.artkmulti of Andrew Roth; but the object just dissapears when I create the object jit.gl.node, I´m trying to deal with it..
Forums > Jitter