Hi Quanteek? Could you sign with the name you wish to be addressed as please.
With drawing the type of model you want to I would recommend avoiding using lots of transforms and separate chunks of geometry as it both loads the CPU and GPU a great deal. Modern GPU's prefer a relatively large chunks of geometry, so a whole branch network or a whole tree might be best placed into a single geometry. Another area you could look into is using the OSG draw instanced support, and apply transforms for a series of elements draw of an array of transforms. Robert. On Sat, Mar 14, 2009 at 3:13 PM, Quanteek <[email protected]> wrote: > Hey everyone, > > I am new to OSG and I am sure that I have misunderstood something about > rendering into OSG. > > I have got two models of pattern : one for a cylinder, and one for a leaf of > a tree. > > The openGl way would be to use a display List and store my pattern into and > when I have to redraw the thing into a different place than pre-calculated > one I use glMultMatrix and glCallList with the good number. > > In osg I load them into a osg::Geometry thanks to a PrimitiveSet (ElementUInt > + Polygon) but I create a Geometry for every new place. > So typically I have got a Geode for cylinder and a Geode for leaf because I > will not use same material. And into the Geode cylinder I attach a lot of > different geometries, same thing into leaf. > > Am I wrong ? (I am sure I am :p) Is the good way to create a Geode with a > unique Geometry and then using the MatrixTransform ? Is it not to heavy for > rendering a big scene ? And is collada plugin will export correctly the scene > ? > > Sorry for all these begineers questions but I have looked into documentation > and I am a little bit confusing with all informations. > > P.S. : My scene is only a real tree but with a lot of informations (i.e. each > branch are divided into several (100) cylinders and I have got each leaf too > draw) I have put a screen of wireframe mode > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=8477#8477 > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
