Hi Jason, The PagedLOD node is designed to incrementally load level of detail levels as not to leave null children and to avoid popping straight from low level of detail to heigh level of detail. Chris Hanson has done some custom work which circumvents this for his own app, but its not something that is in the OpenSceneGraph core itself.
Personally I'd create a quad tree with the each PagedLOD only have two children, the low level of detail which is always present, and the external tile, this external tile would be a group contain four PagedLOD's. You code could procedurally generate this without the need for complex code to circumvent the way the core OSG works. Quad trees are generally well suited to most databases anyway in terms of balancing culling and LOD management. Robert. On 10/24/06, Jason Beverage <[EMAIL PROTECTED]> wrote:
Hi everyone, I've been working on a project that uses PagedLOD along with a pseudo loader to dynamically create geometry based on LOD. Things are working great so far, but there is just one problem I'm having that I need some help with. Per a previous mailing list post by Robert, I've created my children with the first child as an inline node and the rest contain the range data and filename used for the pseudo loader. They are arranged in order from lowest level of detail to highest. The issue that I'm having is that the database pager seems to always want to load all previous children before it loads the correct level of detail. For example, if I start very far away from my model, I see the lowest level of detail. If I zoom in very quickly to be right next to the model, I should see the highest. The pager will load all the children in order until it gets the highest level of detail instead of directly loading the highest level. Since things are being generated dynamically, these unnecessary loads can hurt performance. Is there something I can tweak to change this behavior? Thanks! Jason _______________________________________________ osg-users mailing list [email protected] http://openscenegraph.net/mailman/listinfo/osg-users http://www.openscenegraph.org/
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