图形:用一种颜色绘制的3d图表，但有阴影效果(和通常的3d模型一样)

Question

你能告诉我们如何用一种颜色绘制3d图表，但要有阴影效果吗？

任何pm3d的使用都会根据z的值给出颜色，这是我不需要的，而且实际上(视觉上)不会给出阴影。

我想看到图表作为一个通常的三维模型(像往常的3d编辑器一样)。

现在我使用了一个我不满意的选项：

    set hidden3d
    set pm3d
    set palette rgbformulae 22,13,-31

    splot inputFullPath using 2:1:4 with pm3d notitle

​

​

我想看看这样的3d图：

​

​

Answer 1

一个简单的3D照明模型与镜面高亮介绍了在gnuketVersion5.2。见help lighting。以下是文档中的一个段落和一个指向在线演示集的链接。

gnuplot> help lighting

 By default the colors assigned to pm3d objects are not dependent on orientation
 or viewing angle. This state corresponds to `set pm3d nolighting`.
 The command `set pm3d lighting` selects a simple lighting model consisting of a
 single fixed source of illumination contributing 50% of the overall lighting.
 The strength of this light relative to the ambient illumination can be adjusted
 by `set pm3d lighting primary <fraction>`.  Inclusion of specular highlighting
 can be adjusted by setting a fractional contribution:
      set pm3d lighting primary 0.50 specular 0.0   # no highlights
      set pm3d lighting primary 0.50 specular 0.6   # strong highlights

链接到在线收集的照明演示

​

​