[vtkusers] Mesa / VTK problems

[Prabhu Ramachandran]

>>>>> "BP" == Brian Paul <brian_e_paul at yahoo.com> writes:

    BP> OK, I'm starting to look into the missing triangle problem.

Thanks!

    BP> I've downloaded VTK 3.2 and I'm compiling it now.  Is there a
    BP> sample program which exhibits the problem?  I'd like someone
    BP> to explain exactly how to reproduce the bug with minimal
    BP> hassle.

You can try to compile and run vtk/graphics/examplesCxx/medical1.cxx
first.  This should display ok.  Then try out
vtk/graphics/examplesCxx/medical2.cxx

This will show you missing polygons above the lip and below the nose.

I also see random disappearance of actors at times with some of my
Python scripts but am unable to replicate it.  Will let you know when
I am able to get a repeatable error.

    BP> I'm building from the vtk32-src-unix.tgz source archive but I
    BP> have no idea where to get the (non-RPM) "data files" from.

Go to http://public.kitware.com/VTK/get-software.php and grab the data
files there the files are of the form:  vtk20data.part*

    BP> Regarding the VTK build process, I think that 'user.make'
    BP> could have some more reasonable default values.  At least on
    BP> RedHat 7.2, using /usr/include and /usr/lib for Tcl, Tk and
    BP> Mesa works.

Well, VTK 4.0 has much improved support for building and installing.
It uses CMake for the build/configure process
(http://public.kitware.com/CMake). However, VTK 4.0 has not yet been
released though -- you'd need to get it off CVS.

Thanks again,
prabhu