视景仿真中三维地球的建模

给出了一种基于Blue Marble纹理和GTOPO30高程数据的三维地球建模方法，可消除地表各分块间的缝隙。地表形状模拟精度高，结合多分辨率纹理和高程，实现了对地球的变视角和缩放操作，在飞行模拟、导弹发射、卫星绕地球飞行等涉及到地球大场景或全球视景的仿真中被广泛采用。该建模方法对类似的建模提供了一种新思路，有较高的通用性和实用性。

3D Earth Modeling in Visual Simulation

This paper presents a new method on 3D earth modeling based on the blue marble texture and GTOPO30 DEM data. The gaps between surface tiles are eliminated and the surface of the earth is simulated accurately. By means of multi-LOD of the texture and the DEM data, the 3D earth can be viewed from any direction and can also be zoomed. Such 3D earth can be adopted in visualizations such as flight simulation, missile launch and satellite orbiting. The modeling method also presents a new idea on other similar modelings, and is of high generality and usability.