Hi Peter you wrote
=== > right now my idea is to figure out a way to create a way to create forest > scenes for a project I'm working on, and use sort of a method of > pre-rendering the scene, and then applying it in a way which would allow for > at a certain altitude/distance and below, the trees and such would be 3d, > however further out that would be done with 2d billboards, similar to the > trees in MS FSX or X-Plane 9. The areas would be pre-generated by defining in > a layout tool certain regions in which to make a mass of trees, or putting > individual trees/shrubs in manually, and then saving it into a landscape > that's usable. The general idea is to create a method of simulating forests > for ground operations at a higher detail, or for jets, a lower detail the > further up you get. I would try to use a layout tool using something like > google earth for reference imagery, to try to decide where to put these > chunks, and individual areas, and put down the objects. Then I might work on > a ground texture method whi > ch would allow for higher detail ground textures the closer you get. The > layout tool is still a work in progress, or at least version 2 is, so that's > up in the air. The overall idea though is to create a functional foliage > system for the project which would allow for high details on the ground, > while maintaining good frame rates in the air. The databases would all be > based off placing it in a editor based off satellite imagery, and using > polygons to define some areas where it's just a big massive forest for > example. > > ------------------ 1) placing trees see end of page http://www.vterrain.org/Plants/distrib.html , it has links to ready implementations 2) for trees paging you may check http://www.ogre3d.org/wiki/index.php/PagedGeometry_Engine which is less general than features offered in OSG, but it would be great in case you have an example for community to integrate both terrain paging and geometry of trees paging. The way you will load scenery ( either as a set of points with special attributes for trees and actual geometry of trees) will determine the shape of your page loader. BTW for trees there is a free software ( still unreleased and you may try to find previous version somewhere ) http://dryad.stanford.edu/ - you may contact them and urge to move faster in releasing code - it is quite a while that they promised to release it :) 3) for billboard phase there is already 'billboard' forest in samples. you may also try to develop 'forests regions' - namely 'building' like boxes with irregular shapes and with prerendered ( maybe even bumped ) textures on them. which will look from above like forest with elevation on ground. Regards Sergey http://www.hmelyoff.com _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
