Re: [Octaviz-help] Specify view from the command line or script.

[Jonathan S. <jjs...@vc...>]

Peter A. Gustafson wrote:
> Hi,
> 
> On Friday 05 October 2007 09:59:05 am you wrote:
>>> Hi,
>>> vtk_contour and vtk_contourf.  I think vtk_contourf actually does what I
>>> want, however in some plots the black contour lines do not show up.
>> Can you provide an example where the lines do not show?
> 
> After more testing... I think the lines are present in general but not visible 
> in the screen when viewed from different perspectives.  If/when I get a 
> better handle on this, I will provide more detail.
> 
>>> When using either as a standalone function, it would be nice if I could
>>> turn the zaxis labels etc off.  I think this can be done but I don't
>>> know how.
>> If you look in vtk_contour.m, there is a commented line near the bottom:
>>
>> %f.axes.YAxisVisibilityOff();
>>
> 
> I tried this and it seems to work _most_ of the time, though not all the time.  
> I would turn it back on if I were you, as I would say it is better to error 
> on the side of working most of the time than having extra labels present all 
> of the time.
> 

Changed in CVS.

>>> In working on a view function, I'm running into trouble printing to pdf
>>> (tex) where labels are clipped.  I see:
>>>
>>> f.renderer.GetActiveCamera().SetClippingRange(...);
>>>
>>> Is this how I would ensure that all labels are printed?
>> Not sure off hand.  Can you provide an example where you are having
>> trouble?
> 
> Try the following:
> 
> [x,y,z]=peaks();
> f=vtk_figure(0);
> vtk_blackonwhite;
> vtk_meshc(x,y,z);
> vtk_axis("square");
> f.renderer.GetActiveCamera().SetPosition(-1, -1.25, .3);
> f.renderer.GetActiveCamera().SetFocalPoint(0,0,0);
> f.renderer.GetActiveCamera().SetViewAngle(5);
> f.renderer.GetActiveCamera().SetViewUp(0., 0., 1.);
> f.renderer.GetActiveCamera().SetClippingRange(0, 10);
> f.renderer.GetActiveCamera().SetParallelScale(0.87);
> f.window.SetSize(400,400);
> vtk_update(f);
> vtk_xlabel("x");
> vtk_ylabel("y");
> vtk_zlabel("zzzzzzzz");
> vtk_print("test.tex","-dpdf","-tex","-vect");
> 
> For me, the zlabel doesn't show. It does show up if it is a single character 
> z, or if I move the plot with the mouse so that the zzzzs are in the middle 
> of the plot.

This is an issue with the postscript/pdf converter (GL2PS).  I get the 
same behavior (the zzzz label not showing) if I just print straight to 
pdf without the -tex flag.  The suggestion I have at the moment is to 
change the aspect ratio of the window like this:

f.window.SetSize(500,400);

This solves the problem for your particular example.  It should also be 
possible to use SetFocalPoint, SetDistance, etc., to adjust the 
placement of the figure in the window, but I haven't yet figured out how 
to then update the rendering without resetting all of these...  Let me 
know if you have any success with those commands.

> 
> Another question, can fon't sizing be turned off.  I want identical font sizes 
> managed by tex.  
> 

At the moment I can only suggest that you post-process your .tex file. 
Perhaps something like:

sed -i -e /fontsize/d test.tex

will work for you.

Regards,
Jonathan