jungjaehwa Posted December 11, 2012 Share Posted December 11, 2012 Hello, there. This is Jamie here. I would like to ask you that what is correctly the point cloud in Houdini? And then how to use that widely? I found a few hip files on OdForce and Google. But I can not fully understand about the point cloud. As far as I know that The point cloud is 3d scaned data with xyz format.; Very confusing... Please kindly help me. I am looking forward to hearing from you soon. Thanks a lot. Best, Jamie 1 Quote Link to comment Share on other sites More sharing options...
Hazoc Posted December 11, 2012 Share Posted December 11, 2012 (edited) Well do you know what photon maps are? Houdini's point clouds have a lot in common. They are like particles that can store what ever data you want. They could act as a source of simulation forces, sources of light(photon map) or some wild shader data. For example, you access the point data by telling the point cloud your current shading position in a shader and the point cloud returns you attribute values of the points near the given position which you can then use as a part of shading process. There are many examples available. Edited December 11, 2012 by Hazoc Quote Link to comment Share on other sites More sharing options...
jungjaehwa Posted December 11, 2012 Author Share Posted December 11, 2012 (edited) Hi, Hazoc. Thanks a lot for your favor. I need to know more. Houdini's point clouds similar to Renderman with point cloud "ptc format" ? Right ? And It has a list of attribute like point SOP? Such as an XYZ position, color, alpha, uv, normal... First off I am testing a SSS Scatter SOP to understanding the point clouds. Have a great day. I would like to talk again in order to get more information. Edited December 11, 2012 by jungjaehwa Quote Link to comment Share on other sites More sharing options...
ikarus Posted December 11, 2012 Share Posted December 11, 2012 (edited) A point cloud can behave like any other format in houdini except it only stores points and point data. It's data structure makes it faster to do computations with and takes up less space. http://www.sidefx.co...unctions/pcopen http://www.sidefx.co...tions/pciterate http://www.sidefx.co...ctions/pcimport These are the bread and butter vex pointcloud functions Edited December 11, 2012 by ikarus 1 Quote Link to comment Share on other sites More sharing options...
anim Posted December 11, 2012 Share Posted December 11, 2012 nowadays it's more about http://www.sidefx.co.../vop/pcnumfound and http://www.sidefx.co...p/pcimportbyidx and must not forget about http://www.sidefx.co...es/vop/pcfilter which can handle many standard pointcloud filtering cases without the need of building custom loops 1 Quote Link to comment Share on other sites More sharing options...
ikarus Posted December 12, 2012 Share Posted December 12, 2012 well those are really just pc loops packaged for specific purposes Quote Link to comment Share on other sites More sharing options...
jungjaehwa Posted December 12, 2012 Author Share Posted December 12, 2012 Dear Ikarus, Thank you so much for your help. -------------------------------------------- Dear Anim, Thanks a lot for your link. Today I had a great fun watching the movie 'Rise of the Guardians'. Great~ I guess that there are so much using particle like point clouds. I am testing more and more still getting used. Have a great day. Quote Link to comment Share on other sites More sharing options...
jungjaehwa Posted December 13, 2012 Author Share Posted December 13, 2012 I can not find that how to make point clouds. A SSS Scatter SOP is not work to make a pc file on Render hit the button. My Houdini version is the Houdini FX Version 12.1.33 Non-Commercial Edition. Please help me~ Quote Link to comment Share on other sites More sharing options...
jungjaehwa Posted December 13, 2012 Author Share Posted December 13, 2012 I find it out in Houdini Help Documentation & Examples. -------------------------------------------------------------------- .../examples/nodes/vop/pciterate/PointCloudLookup.otl Have a great day. Thanks all. Quote Link to comment Share on other sites More sharing options...
BOON Posted December 13, 2012 Share Posted December 13, 2012 (edited) I can not find that how to make point clouds. A SSS Scatter SOP is not work to make a pc file on Render hit the button. My Houdini version is the Houdini FX Version 12.1.33 Non-Commercial Edition. Please help me~ try op:`opfullpath("<NODE_PATH_HERE>")` in the "Point Cloud Texture" parm or, you can cache out a file with ".pc" extension and read it back at the same parameter Edited December 13, 2012 by BOON Quote Link to comment Share on other sites More sharing options...
jungjaehwa Posted December 17, 2012 Author Share Posted December 17, 2012 Hi BOON, Thank you so much for your help. But I can not do that.^^ Could you make a hip file please? Quote Link to comment Share on other sites More sharing options...
BOON Posted December 17, 2012 Share Posted December 17, 2012 Here u go... PointCloudOpen.rar Quote Link to comment Share on other sites More sharing options...
jungjaehwa Posted December 18, 2012 Author Share Posted December 18, 2012 Hello! BOON. I greatly appreciate what you got interested in my question. Thanks for your attached. Have a great day. Quote Link to comment Share on other sites More sharing options...
jungjaehwa Posted December 20, 2012 Author Share Posted December 20, 2012 There is a great tutorial about the POINT CLOUD. Houdini Directable Particles http://www.cmivfx.com/tutorials/view/460/Houdini+Directable+Particles The Point Cloud in Houdini is a cool way to control all I make to want. Have a good day. Quote Link to comment Share on other sites More sharing options...
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