三维数据场可视化透明处理技术

A Technique for the Visualization Processing of 3D Data Field

将折射效应考虑到Ｄ．Ｓ．Ｋａｙ（１９７９）提出的基于曲面法向量Ｚ分量的非线性透明方法中，克服了线性透明算法缺乏真实感的不足。利用Ｗｈｉｔｔｅｄ（１９８０）的光照模型，实现了具有多光源有背景的透明真实感处理。所编程序只要输入物体材料的透明特性，就会产生透明程度不同的真实感图形。

The nonlinear algorithm for transparency technique considering refracted effectiveness of light presented by D. S. Kay(1979)on the basis of the Z component of normal vectors over curved surfaces has some advantages over linear one. A ray tracing algorithm based on the Whitted(1980)globle illumination model with multilight source and back-grounded is applied to fulfill shading, shadow and transparency. With our programme established optical coefficients of a material may be input and realistic images in different degrees of transparency may be produced.