三维地理信息系统中纹理的非参数映射及矢量剪切  

NON-PARAMETER MAPPING AND VECTOR CUT OF TEXTURE IN 3D GIS

作　　者：田宜平[1] 刘刚[1] 韩志军[1] 吴冲龙[1] 

机构地区：[1]中国地质大学资源学院,湖北武汉430074

出　　处：《地质科技情报》2000年第2期103-106,共4页Geological Science and Technology Information

基　　金：国家自然科学基金"九五"重点项目! (49732 0 0 5 );国土资源部矿产定量预测与勘查评价开放实验室基金项目"地学信息系统的三维建模工

摘　　要：根据日常生活和地矿工作的实际需要 ,利用相似变形原理 ,提出了一种新的非参数映射法——实物标志点映射法 ,同时给出了纹理映射后的矢量剪切算法——空间曲面网格与剪切平面求交的算法。这种新的纹理映射法和矢量剪切算法简单易行且准确可靠 ,而且具有很强的灵活性和适应性 ,推广应用前景良好。一个典型城市景观的应用实例说明了该方法的有效性。Application of texture mapping is very popular in 3D GIS.There are many surfaces that can't be described by equation in real world.Non-parameter mapping of texture will be selected.According to demands in practical work,a new non-parameter mapping method—solid character point mapping method,is put forward based on similar deformation principle.After texture mapping,a vector cut algorithm calculating intersection points between spatial curve mesh and cut plane is also presented.The new texture mapping method and vector cut algorithm are easy,accurate,flexible and prospective,whose effect is demonstrated by a typical example of urban landscape.

关 键 词：GIS 纹理 非参数映射 矢量剪切 

分 类 号：P9[天文地球—自然地理学]