CODEWITHSUNDEEP
gnuplot
John Doe
John Doe

Reputation: 145

gnuplot: solid filled triangle in 3D - splot function

I have this file (x.txt):

0 0 0
0 0 2
2 2 1
0 0 0

which has coordinates of vertexes that should make the triangle.

I want the triangle to be filled. I tried few ways, but didn't succeed:

splot "x.txt" with lines     #triangle is not filled

splot "x.txt" with pm3d      #I can see only points

set style fill solid
splot "x.txt" with lines     #Just lines

I saw few examples on the internet showing how to do it, but none of them worked for my points. Example: http://gnuplot.sourceforge.net/demo/hidden2.html - almost what I want. I want the color not to change and be the same on the whole surface of the triangle.

Upvotes: 1

Views: 2614

Answers (1)

Christoph
Christoph

Reputation: 48440

If you want to show only this one triangle, you must change your file a bit and use set pm3d ftriangles. Usually, this is used to draw a smooth boundary if two subsequent scans don't have the same number of points:

File x.txt:

0 0 0

0 0 2
2 2 1

Plot it with 

set pm3d ftriangles
splot 'x.txt' w pm3d notitle

The result with 4.6.3 is:

enter image description here

Upvotes: 1

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