[Octave-bug-tracker] [bug #48109] Trisurf fails to colour triangles correctly.

[Hugo Raguet]

Follow-up Comment #2, bug #48109 (project octave):

Hello

similar problem here, Octave 4.2.1 on Linux.
Obviously, `trisurf` is supposed to specify *one color per triangles*.
However, the source code expects one color per vertex, which is wrong:

...
        error ("trisurf: C must have 'numel (Z)' elements");
...
      error ("trisurf: TrueColor C matrix must be 'numel (Z)' rows by 3
columns");
...
    c = z(:);
...

However; when calling directly the primitive `patch` function (which is
eventually called in trisurf.m, but with wrong arguments), all is well.
This might explain other `trisurf`related bugs, and seems to be easily fixed.

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