bug in depthorder?

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

The enclosed script using the "pm3d depthorder" gives wrong ordering of 
faces on gnuplot-cvs, and sometimes wrong and sometimes good ordering on 
gnuplot 4.2. Also try to rotate the plot by mouse. How can this happen?

***

f(x,y)=sin(x*y*pi/180)/(x*y*pi/180)

if (1)  set xrange [-720:720]; set yrange [-720:720]; \
        set sample 10; set isosamples 10; set table 'a.dat'; splot f(x,y); 
unset table; reset

set auto fix
#set xrange [0:10]; set yrange [0:10]
set xlabel "x axis"; set ylabel "y axis"
set xyplane at 0

set pm3d

set pm3d depthorder

set view 64, 287
splot 'a.dat' with pm3d

pause 1

set view 64, 286; replot