Recent changes to 2867: hidden3d not working as expected

#2867 hidden3d not working as expected

Igor Bray — Tue, 14 Apr 2026 23:28:00 -0000

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#2867 hidden3d not working as expected

Igor Bray — Tue, 14 Apr 2026 23:21:17 -0000

Problem fixed. It seems with "set hidden3d" it is important to add "u 1:2:3" to the splot command:
gnuplot> set multiplot layout 1,2
multiplot> sp 'theta_1/grid2/splot.111' w l ls 1
multiplot> set hidden3d
multiplot> sp 'theta_1/grid2/splot.111' u 1:2:3 w l ls 1

#2867 hidden3d not working as expected

Ethan Merritt — Tue, 14 Apr 2026 16:32:16 -0000

Please attach the data file also. I is hard to reproduce a data plot without the data.

hidden3d not working as expected

Anonymous — Tue, 14 Apr 2026 12:47:19 -0000

Using the following commands the attached screenshot is generated:
gnuplot> set multiplot layout 1,2
multiplot> sp 'theta_1/grid2/splot.111' w l ls 1
multiplot> set hidden3d
multiplot> sp 'theta_1/grid2/splot.111' w l ls 1
multiplot> unset multiplot

The problem is that the image on the right has lost color, and does not have different colors for the top and bottom parts of the surface. Played with "offset <n>" options with no luck. Interestingly, the image on the right takes around 10 times longer to generate. Have tested this on three different Linux environments using gnuplot 5.2, 5.4 and 6.0, all of which yield the same output. I still have the output from gnuplot 4.6 which worked perfectly.</n>

hidden3d not working as expected

Anonymous — Tue, 14 Apr 2026 12:47:19 -0000

Ticket 2867 has been modified: hidden3d not working as expected
Edited By: Igor Bray (igorbray)