Hybrid Primitive-based Rendering Techniques On Three Dimensional Models

With the fast development of modern technology, virtual reality technique is becoming more and more sophisticated. And it is applied to many fields such as aviation simulation, space techniques, engineering and manufacturing as well as media entertainment. This paper mainly focuses on three dimensional model reconstruction techniques which enjoy extensive application in many fields.Three-dimensional model rendering technique is very important in the model reconstruction field. So it is developing very fast. There are mainly two kinds of approaches. One is the traditional polygon-based rendering. The other is point-based rendering. Both of the two has different advantages and disadvantages. Point-based rendering has advantages in the aspects of speed and storage requirement; while polygon-based rendering has advantages in rendering models that have precise subtle details.This paper presents a three-dimensional rendering system called FALCON, which constructs a tree hierarchy of nodes through preprocessing. At rendering time, it adopts view frustum culling and level of detain techniques to render each nodes when traversing the hierarchy. What's more, it is a hybrid primitive based rendering system. When under relatively low precision condition, it adopts point-based rendering. While under high precision condition, especially when magnifying, it adopts polygon-based rendering to achieve more precisely detailed effect.Due to the fast development of network techniques, network-based rendering techniques have also become to hotspot of modern science. In order to extend the network-based application of FALCON system, we further discuss the network streaming techniques on three-dimensional models. We expect further improvement of algorithms and data structures for network application.