Gnuplot: how to plot 3d image using vertex data?

Question

I'm new to Gnuplot. I want to draw a 3d image by vertex data. how do I plot this data file correctly?

thank you for reading

---datafile format is like this---

x y z

0.0 2.1 4

0.5 0.4 1.2

0.2 0.3 0.3

0.6 0.4 0.9

0.3 0.6 0.2

0.4 3.2 1.6

.

This data format is from an STL file. I must use an STL data for calculating some physical quantity. This x,y,z data is vertices. — kouzou tanaka
What kind of image do you expect? Can you link to a similar one? — choroba
nasa3d.arc.nasa.gov/detail/bennu this is the same file type. I will use these vertex. I wouldn't use normals — kouzou tanaka

gdupras gdupras · Accepted Answer · 2020-04-22T15:05:26

Assuming your data is in the file vertex.dat, you can do

splot 'vertex.dat' using 1:2:3 with lines

to draw a line between consecutive points. The output is something like this: