The Application Of Algorithm Research About Model Data Based On Large-scale Scene

Along with the progress made in 3D modeling technology, the object models in virtual environments are getting more and more complicated and the whole scene usually overloads the capabilities of graphics chips. The technology of simplify 3D model for objects in the scene according to their visual importance and optimize triangle distribution of the scene has become a key technology of the real-time rendering.The paper aimed at improves the computer's ability to run according to simplify the established models data in visual scene. It in depth studies on the part of the algorithm as following three aspects.1. The constructions of terrain data. It is very important to establish the terrain data in the visual scene. The system integrated two kinds of algorithems of elevation map and imported vector.2. The system used LOD technology on the constructions, it researched and achieved the simplify algorithm about terrain quad-tree LOD. It direct-viewing represents the effect of the algorithm according to increasing or decreasing the smallest details of the value.3. Researched the blanking algorithm and realized the cut of objects in visual scene.4. The objects in visual like trees and so on are not need high importance in view, and these objects could be used by texture mapping technology to rendering.The experiment certificated that the algorithms we used could greatly improve the computer's efficiency, fast and easy to be realized.