基于三角网格的三维地形局部贴图方法的研究

纹理映射技术是一种提高图形真实感的有效手段.目前常用的一些三维开发软件，如Vrml、Java3D，一整片曲面只能一次加一种纹理，不能满足以不同的纹理贴图来表现不同地貌的需求.为此给出一种基于三角网模型的三维地形的局部贴图方法，在整个三角曲面片中，通过用户划定范围并且对划定后的范围进行局部贴图，从而可在一个曲面片上表现不同的地貌特征.该方法优于通过多张地形曲面表现多地形不同地貌的方法.

Partial texture mapping method of 3D terrain based on triangular mesh

Texture mapping technique is an effective method to enhance realistic of the graph.At present,popular 3D developing software such as Vrml and Java3D can establish only one kind of texture on a entire piece of curved surface,and can not satisfy the demand of displaying different landform by different texture mapping.Aiming at the problem,the partial texture mapping method of 3D terrain based on triangle mesh model was given.The main idea is that the entire piece of triangle curved surface are divided into sub-piece by user,and each sub-piece is rendered by different partial texture mapping so as to represent different landform characteristic on one curved surface piece.This method is better than the one that represents different landforms characteristic using multi pieces of curved surface.