Re: pm3d and parametric function surface plots

[Petr M. <mi...@ph...>]

(*) The ordering works with the torus example. But then I have tried this
demo:

set pm3d depth
splot 'whale.dat' with pm3d

but it does not do the ordering. What's wrong?

(*) The option "set pm3d ... depth" should have also "... nodepth" variant
to switch this feature off.

(*) Quadrangles may take a lot of memory. I propose to change double to
float (should probably happen also for gpdPoint structure).

typedef struct {
    double gray;
    double z; /* maximal z value after rotation to graph coordinate system
*/
    gpdPoint corners[4];
    gpiPoint icorners[4]; /* also if EXTENDED_COLOR_SPECS is not defined */
} quadrangle;


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