Hi Micahel, For static transforms there will be no need to retain the whole transform hierarchy, instead I'd recommend accumulating all these transforms to provide a position that you need to place your markers. As a first step you could keep your AutoTransform above your final geometry, but just remove the transforms above the AutoTransform, this won't provide you with maximum performance possible but it'll certainly be a step in the right direction, and if you get the performance you need job done. If this isn't sufficient then you'll need to look at other techniques such as vertex shaders for computing the the scaling.
Robert. On 12 July 2012 14:28, Michael Schanne <michael.scha...@gmail.com> wrote: > Our application is a CAD-type app. Our domain objects already store their > locations relative to other objects, so we thought it made sense to mirror > that in our scene graph. Most of these transforms will not change from one > frame to the next, only when the user adds/removes/moves an object, or at > certain other times. > > We also have a live video image provided by a real camera that we are > projecting into the scene through projective texture mapping. It's important > to maintain 20 fps for the video, not so much for the rest of the scene. > Some of our domain objects are represented by 3D surfaces that we want the > video projected onto. Others are overlay type objects that will not have the > video texture applied to them. For each type of object, we have a single > Geode that we then share between all the leaf MatrixTransforms corresponding > to each object's location. > > For the sample graph in my earlier post, each of the 2000 subgraphs are > initially identical. However at certain points in time one or more matrices > in the subgraphs might change, so they would no longer be identical. We also > need to be able to easily add or remove objects at any level at any time. > > ... > > Thank you! > > Cheers, > Michael > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=48815#48815 > > > > > > _______________________________________________ > 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
