Here's a short gnuplot example that illustrates 3-d function plotting with contours and hiddenlineremoval.
下面是一个简单的gnuplot例子，它给出了一个具有等高线和隐线消除的3 - D图形。
2
This paper presents a pixel level algorithm for drawing implicit surfaces, which accomplishes hiddenlineremoval according to the feather of implicit surface.
文章提出了一个隐式曲面的象素级生成算法，并针对隐式曲面的特点实现了隐藏线消隐。
3
The base contour is enabled along with hiddenlineremoval, and the sinc plot is created with the splot command using the internally available math library functions.