[vtkusers] file format: Polygonal Data - POINTS, POLYGONS - wireframe, surface visualization

[Chris Kennedy]

hi,
I'm creating VTK format files and I have trouble when I visualize the 
data. In wireframe it looks ok, but in Surface mode I have triangles 
showing up that I don't understand.  I get the same behavior independent 
of whether I close the polygon or not.

# vtk DataFile Version 2.0
polydata for mask m3
ASCII
DATASET POLYDATA
POINTS 12 float
25.0 0.0 3.0
25.0 8.0 3.0
15.5 8.0 3.0
15.5 11.0 3.0
12.5 11.0 3.0
12.5 19.0 3.0
0.5 19.0 3.0
0.5 9.0 3.0
10.5 9.0 3.0
10.5 6.5 3.0
14.0 6.5 3.0
14.0 0.0 3.0
 
POLYGONS 1 14
13   0 1 2 3 4 5 6 7 8 9 10 11 0

# =====================

Do I need to define additional data for the POLYDATA type to get this to 
show up properly? or is subsequent processing thru a filter required?

thanks
 
Chris Kennedy
Think Peak, Inc.