Re: [osg-users] Streaming world and integer limits
Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50875#50875 What does it mean? I'm new to graphics engines and I just wanted to know was it possible to do several things or I shouldn't just waste my time digging into OSG. -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50907#50907 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Streaming world and integer limits
I appreciate your answer. I understood that I should firstly read books before asking silly questions. That's happened because I tried to understand OSG using BlitzBasic knowledge :x -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50911#50911 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Streaming world and integer limits
I'm saying about position of a node. If I model earth (for example) then the camera (for example) or another node will move from southern pole (0, 0) to equator (0, MAX_INT) and then it will move again to southern pole though it increments its position (not decrements), due to integer overflow (MAX_INT + inc_pos = inc_pos). Again, if I have a node with position (200, 200) and a child node with position (MAX_INT, MAX_INT) the result position of the child's node will be MAX_INT + 200, MAX_INT + 200. That means integer overflow again. These two cases are not clear for me. Sorry, if I've expressed myself not so clearly. Thanks for your answers. -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50875#50875 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Streaming world and integer limits
Hi Where did you found anything about node positions being stored as integers in OSG? Nodes are positioned with osg::Transform derived classes which use floating point (single or double precision, depending on build configuration) matrices\vectors\quaternions for transformations. Cheers. 30.10.2012, 12:17, Dmitry K. zzfi...@hotbox.ru: I'm saying about position of a node. If I model earth (for example) then the camera (for example) or another node will move from southern pole (0, 0) to equator (0, MAX_INT) and then it will move again to southern pole though it increments its position (not decrements), due to integer overflow (MAX_INT + inc_pos = inc_pos). Again, if I have a node with position (200, 200) and a child node with position (MAX_INT, MAX_INT) the result position of the child's node will be MAX_INT + 200, MAX_INT + 200. That means integer overflow again. These two cases are not clear for me. Sorry, if I've expressed myself not so clearly. Thanks for your answers. -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50875#50875 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Streaming world and integer limits
OK, thanks, looks like I need to read more about OpenSceneGraph before asking such questions. -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50881#50881 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Streaming world and integer limits
If you're modeling on the earth, you should be using double precision for your camera position... -Original Message- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Dmitry K. Sent: Tuesday, October 30, 2012 2:16 AM To: osg-users@lists.openscenegraph.org Subject: Re: [osg-users] Streaming world and integer limits I'm saying about position of a node. If I model earth (for example) then the camera (for example) or another node will move from southern pole (0, 0) to equator (0, MAX_INT) and then it will move again to southern pole though it increments its position (not decrements), due to integer overflow (MAX_INT + inc_pos = inc_pos). Again, if I have a node with position (200, 200) and a child node with position (MAX_INT, MAX_INT) the result position of the child's node will be MAX_INT + 200, MAX_INT + 200. That means integer overflow again. These two cases are not clear for me. Sorry, if I've expressed myself not so clearly. Thanks for your answers. -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50875#50875 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or g ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
