多層次幾何模型切換機制之研究

Abstract

在複雜的虛擬環境下,為了達到互動式的畫面交替速率,考慮不同層次的細 部顯示是一個合適的方法.觀察者和物體之間的距離常常被視為不同細部 層次選擇的考量.在本論文中,我們將考慮其他幾個不同層次的選擇標準, 諸如視角,霧的影響,照明度,和車子移動的速度等等.另外,我們提出一個 漸進式的層次切換方法.最後,我們將這些方法應用在駕駛模擬上. In complex virtual environments, considering different levels of detail for displaying is an appropriate approach to achieve interactive frame rates. The distance between observer and object has always been regarded as a switching criterion for multiple levels of detail. In this thesis, several other criteria, such as view angle, the effect of fog, illumination, and the velocity of vehicle, are taken into account. In addition, a progressive switching approach for level of detail is proposed. Finally, theapproaches are applied to an application of driving simulation.