基于数据离散场等值线绘制的研究

对工程应用中的等值线图的绘制进行了研究。在原有网格线法、点阵法的基础上，设计了三角形网格法，该方法选用原数据离散点为网格结点，用链表存储三角形网格，设计了三角形网格生成和确定等值线的算法；为使曲线达到C^1或C^2光滑连续，又设计了追踪等值点算法；并给出了离散场等值线的计算机可视化填充技术，即利用RGB颜色模型，对三角形网格进行处理。最后用实例证明三角形网格法的可行性，该方法误差小易易实现。

The Drawing of Isograms Based on Data Dispersed Field

Isograms includes contour lines, isotherms, fathom lines and so on. In practical engineering, the drawing of such isograms is much easier with fewer errors if they are protracted by a triangular gridding divisor, compared with those drawn by gridding divisor or lattice divisor. A triangular gridding divisor makes the gridding crunodes as the disperse points of the original data. The table of chain memorizes the triangular gridding. This study has provided the way to form a triangular gridding and work out isograms. In order to enable the curve to be as smooth a continuum as C 1 or C 2, it also provides the way to trace the equivalent points. Besides, it supplies the computer visual filling technique of dispersed field isograms, treating triangular gridding by use of the RGB color model. It concludes with an example that demonstrates the feasibility of the triangular gridding divisor.