Need a rooftop!

Wed Apr 19 04:59:51 EDT 2000

Hi Matthieu,

the following may be the reason for your trouble:

1. In the CELLS section you used 1-offset point indices instead of 0-offset
ones. Please try the following:

CELLS 4 16
 3 0 1 2
 3 1 3 2
 3 3 4 2
 3 4 0 2

2. You need to assign the scalars to the points or to the cells by the
keywords POINT_DATA or CELL_DATA prior to SCALARS:

POINT_DATA 5
SCALARS thickness8 float
LOOKUP_TABLE default
 0.0
 0.0
 1.0
 0.0
 0.0

Please have a look to the File Formats examples of the "vtk User's Guide"!
It is worth to be bought for fast vtk programming! :)
The same examples can also be found in "The Visualization Toolkit",
... or simply download it as pdf file from
http://www.kitware.com/FileFormats.pdf ,
... or ask the vtk users community again ...

As you see, the vtk way of getting information is a manifold one! :)

Hope, this helps!

Patric Weis
MYCRONA GmbH

- - - Original Message - - -

                    Matthieu                                                                                                              
                    <mpaindavoine at umassd.ed        An:     vtkusers at public.kitware.com                                                    
                    u>                             Kopie:                                                                                 
                    Gesendet von:                  Thema:  Need a rooftop!                                                                
                    owner-vtkusers at public.k                                                                                               
                    itware.com                                                                                                            

                    19.04.00 05:30                                                                                                        

Hello,

I am beginning with VTK, and I am trying to visualize a rooftop. It's
actually a broiled down version of my problem, but it will do for now.
The data file is attached.
I run a program to visualize it, and it crashes, dumping core and all
that. The first error VTK finds is something like
vtkUnstructuredGridReader.... Unrecognized keywords: scalars.
I run the same program on the blow.vtk data set, and it works fine.
I would like to know what is wrong with my data file.

I gladly welcome any suggestion.
Thank you,

Matthieu
# vtk DataFile Version 1.0
roof
ASCII

DATASET UNSTRUCTURED_GRID
POINTS 5 float
 0.0 0.0 0.0
 1.0 0.0 0.0
 0.5 0.5 1.0
 1.0 1.0 0.0
 0.0 1.0 0.0

CELLS 4 16
 3 1 2 3
 3 2 4 3
 3 4 5 3
 3 5 1 3

CELL_TYPES 4
 5
 5
 5
 5

SCALARS thickness8 float
LOOKUP_TABLE default
 0.0
 0.0
 1.0
 0.0
 0.0

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