Research of Mipmap Textures for Virtual Global Terrain Environment

Mipmap is the best way to make the texture resolution suitable for viewpoint position,which means that the nearer the viewpoint is to the 3D object,the higher texture resolution it requires,and the farther,the lower.The author introduces Mipmap texture into Virtual Global Terrain Environment,just to make it one part of the Pyramid Model and make the simulation more quick and more realistic.First,the author puts forward a new way of generating Mipmap textures,to make up for the disadvantages of current Mipmap texture generation methods.As Mipmap textures may expand the Pyramid Model,the author then discusses how to compress Mipmap textures in an effective way,which can not only decrease the textures' storage,but also speed up the loading and creation of Mipmap textures during real-time rendering.Meanwhile,some experiments are done to demonstrate the performance of these methods. At last,the author shows us how to save compressed Mipmap textures in the Pyramid Model.