plot problem in 3.4.2 (was: Testing binaries of octave for windows (MinGW32) is updated)

[Uwe Brauer]

   > Correction.

   > *******
   > I feel that on windows XP start up time is longer than that in win 7.
   > ********** 
right it needs some 3 minutes to start up. There are 2
things I have to mention

    -  plotting is slow, and the connection to scite works
       but is even slower!

    -  there is a problem with a special file which uses
       isosurface etc. I attach the code below.

I have compiled version 3.4.2 for ubuntu and I have used
your precompiled version in XP. For both version I obtain
the same plot result. BTW the code does not work in 3.2.4!!

However there are users on this list using version 3.4.2
officially distributed by suse, they obtain a different
plot, which is closer to the plot obtained by matlab.

It is also possible to modify the code such that the plot is
separated in subplots, these subplots are shown in all
compiled version.

I have attached the plot in question already on the list and
therefore don't want to send it again.


I am deeply puzzled and would like to ask for help.

Uwe Brauer 

Code in question

graphics_toolkit fltk 

[x,y,z]=meshgrid(-20:.5:20);
function Psi=FdOn320(x,y,z)
r=sqrt(x.^2+y.^2+z.^2);
Psi=exp(-r./3).*(3*z.^2-r.^2).*2*sqrt(15/(120*pi))/81;
end
Psi=FdOn320(x,y,z);
m=min(Psi(:));
M=max(Psi(:));
color=[1 1 0;1 0 1; 0 1 1;0 1 0;1 0 0; 0 0 1; 0 0 0];
n=2;
for i=1:n-1
    isovalue=m+i*(M-m)/n;
    fv = isosurface(x,y,z,Psi,isovalue);
    hpatch = patch(fv)
    isonormals(x,y,z,Psi,hpatch);
    Alphalevel=0.2+0.8*i/n;
     set(hpatch,'FaceColor',color(i,:),'EdgeColor','black')
     daspect([1,1,1])
     view(3); 
     axis tight
end