In your native dx file, you need to be sure to add a dep attribute
for the other components. For the 'data' component, you must have put
the following:
attribute "dep" string "positions"
You must add this same line to your other components as well. Then
your Mark will work just as you expect.
David
Hello everybody,
I am now able to build a net and to get pretty pictures of my own
datas, but I have still some problems in understanting the DX data
structure and the way to choose from a field the data array to be used
for coloring an object. Any help would be greatly appreciated.
My datas are typically pressure at the surface of on aircraft made of
several 2D surface grids. I have now an interface writing my own datas
into the native DX format (Many thanks to Trevor Wood) and a very simple
net with import->color->shade->image and some additionnal modules to
build the symmetrical part of the aircraft, use a personal colormap, add
a colorbar and bound the datas to some desired min and max values.
The DX data file defines a group object containing a number of fields.
Each field is built from some arrays previously defined in the data file
and has the following structure :
object n class field
component "position" value npos
component "connection" value ncon
component "data" value narray1
component "vitesses" value nvect
component "Kp" value narray1
component "Pi/Pi0" value narray2
The "data" component and the "Kp" component are pointing on the same
"narray1" array for Static Pressure. The "Pi/Pi0" component is pointing
on the "narray2" array for Total Pressure. My net gives pictures colored
from the "Kp" component, but when I add the "Mark" module between
"Import" and "Color" to change the default data array for the "Pi/Pi0"
component, the "Color" modules complains :
Color : Bad parameter, missing data dependent attribute
But the data array seems to be the expected one : a "Describe" module or
the data driven "Colormap" module behind "Mark" both show the expected
data range for the "Pi/Pi0" component, but I can't get a picture of the
aircraft. The net works again if I change for "Kp" in the "Mark" module.
My questions are :
-is the "data" component always needed in a field definition or can we
have only arrays with user defined names ?
-is it possible to import the desired array in a field without using
"Mark" to build the data flow ?
-if "Mark" is the only way to import the desired array, what is missing
in my net or in my data file ?
Thanks in advance for your help.
--
Richard GRENON
ONERA
Departement d'Aerodynamique Appliquee - DAAP/ACI
BP 72, 92322 CHATILLON CEDEX - FRANCE
phone : +33 1 46 73 42 17
fax : +33 1 46 73 41 46
mailto:[EMAIL PROTECTED]
http://www.onera.fr
--
.............................................................................
David L. Thompson The University of Montana
mailto:[EMAIL PROTECTED] Computer Science Department
http://www.cs.umt.edu/u/dthompsn Missoula, MT 59812
Work Phone : (406)257-8530
