[Octave-bug-tracker] [bug #42561] gnuplot colors incorrect for 'demo trimesh'

[Dan Sebald]

Follow-up Comment #25, bug #42561 (project octave):

gnuplot is 1-based indexing, so the toolkit adds 1, otherwise it is the same
scaling.  If one concentrates on the colors of the points of the mesh, they
should be the same between OpenGL and gnuplot.  We can pick a different
formula in gnuplot for blending colors, maybe one will be similar; or maybe it
is the ordering of the points that needs to change.

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