如何避免pm3d曲面遮挡其前面的其他对象？

debugcn 发表于 Dev

奥特玛·绍布（Ottmar Schaub）

我正在尝试绘制方程x + y + 2z = 0的简单线性曲面。这是我的文件：

set xrange [-4:4]
set yrange [-4:4]
set zrange [-4:4]
set xlabel 'x'
set ylabel 'y'
set zlabel 'z'
set xyplane at -4.0
unset xzeroaxis
unset yzeroaxis
unset zzeroaxis
set border 1023-128 
set xtics out nomirror
set ytics out nomirror
set ztics out
set xtics add ('' -4)
set label 1 "{/:Italic x} + {/:Italic y} + 2{/:Italic z} = 0" at 4,4.2,-2 font 'Times New Roman, 11'
set arrow 1 from 0,0,-4 to 0,0,4 filled
set arrow 2 from 0,-4,0 to 0,4,0 filled
set arrow 3 from -4,0,0 to 4,0,0 filled
set arrow 4 from 3.9,4.1,-2.1 to 3.6,3.6,-2.5
unset key
set pm3d lighting primary 0.5 specular 0.6
set style fill transparent solid 1 noborder 
set palette defined (0 "cyan", 1 "green")
unset colorbox
set pm3d depthorder
splot -x/2-y/2 with pm3d

结果

我使用箭头来显示轴，因为它们似乎被固定在xy平面上，并且移动它会导致tic和边框进一步出现问题。但是现在的问题是，它们完全被表面遮挡了。当它们“刺穿”表面时，是否有允许出现在前面的设置？我想使表面半透明，但是使用这些设置可以使问题更加清楚。

伊森

gnuplot> help layer

 A gnuplot plot is built up by drawing its various components in a fixed order.
 This order can be modified by assigning some components to a specific layer
 using the keywords `behind`, `back`, or `front`. For example, to replace the
 background color of the plot area you could define a colored rectangle with the
 attribute `behind`.
      set object 1 rectangle from graph 0,0 to graph 1,1 fc rgb "gray" behind
 The order of drawing is
      behind
      back
      the plot itself
      the plot legend (`key`)
      front
 Within each layer elements are drawn in the order
      grid, axis, and border elements
      pixmaps in numerical order

因此，基本上，您需要向要显示在绘图前面的对象添加“ front”属性。

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