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发表时间 : 2007-11-26 09:09:52 | 浏览 : 4607    评论 : 2
What is PagedGeometry?

The PagedGeometry engine is an add-on to the OGRE Graphics Engine, which provides highly optimized methods for rendering massive amounts of small meshes covering a possibly infinite area. This is especially well suited for dense forests and outdoor scenes, with millions of trees, bushes, grass, rocks, etc., etc.

Paged geometry gives you many advantages over plain entities, the main one being speed: With proper usage of detail levels, outdoor scenes managed by PagedGeometry can be >100x faster than plain entities. Another advantage is that the geometry is paged; in other words, only entities which are immediately needed (to be displayed) are loaded. This allows you to expand the boundaries of your virtual world almost infinitely (only limited by floating point precision), providing the player with a more realistically scaled game area.


Features
● Complete API documentation included, describing every feature in detail
● 4 tutorials included to teach you how to get PagedGeometry set up and optimized in your project
● 7 examples included to demonstrate the actual use of various selected features
● Dynamic geometry paging system, which enables infinite worlds
● Batched rendering LOD for optimized rendering of near-by trees
● Impostor rendering LOD for extremely fast rendering of distant trees
● Flexible LOD display system, which can be expanded to display geometry with any technique you can implement
● Flexible LOD configuration system, which allows you to configure any combination of supported LODs in any way you want
● Optional cross-LOD fade transitions, and far LOD fade-out, fully configurable
● Flexible PageLoader system, allowing you to dynamically load geometry from any source you can imagine
● Easy addition / removal of trees with bit packing, allowing millions of trees to be stored in RAM using only a few MBs
● Color-map support for trees, which enables you to apply terrain lightmaps to your trees with one simple function call
● Animated, optimized grass rendering system. Supports density maps, color maps, wind animations, height range restriction, and much more.


Download PagedGeometry SDK

PagedGeometry SDK v1.02 for Visual C++ .Net 2005 (8.0) - 1.61 MB
PagedGeometry SDK v1.02 for Linux - 0.90 MB
Includes tutorials, examples, and API documentation.

After downloading PagedGeometry, read "GettingStarted.txt", which will help you make sure everything is set up properly for PagedGeometry to run. Note: If you want to get the absolute latest "development" release of PagedGeometry, you can download it from the ogreaddon CVS under "forests".


Download Precompiled Examples

PagedGeometry v1.01 precompiled examples - 3.97 MB
Includes precompiled examples only

The above download includes only the examples that are included in the SDK, precompiled to EXE (Windows only). Note that the main purpose of these examples is to demonstrate how to use PagedGeometry in your code, so they aren't nearly as useful without the source code.


Screenshots & Videos




Videos (slightly outdated):
Jungle Video (5.53 MB, WMV Format)
Vast Forest Video (5.62 MB, WMV Format)
Grass Shadows Video (3.72 MB, WMV Format)


Support

If you have bug reports, feature requests, or need any kind of help, you can post in the PagedGeometry section of the Addons Forum.

Click here to go to the PagedGeometry Addon Forum

最近VR访客

rhett 评论于2007-11-26 09:19:58
不错
我想这个查件应该是把静态几何体,LOD这两个技术结合起来,以地形页为渲染单位.
此外,GPU GEMS2有一篇文章专门介绍大面积的植被模拟,很不错

[ 本帖最后由 rhett 于 2007-11-26 09:25 AM 编辑 ]
一剑西来 评论于2007-11-26 12:37:44
顶一下,我刚在OGRE网上看到这个,确实是不错。场景很漂亮

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