Re: [opendx-users] Choosing the data array
Thanks everybody for your help. In fact no attribute clause was defined in my data file, and it was working only with the array pointed to by the data field component. Now I have put an attribute dep clause for each data array and Mark is working as expected. Best regards -- 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
[opendx-users] Choosing the data array
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
Re: [opendx-users] Choosing the data array
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 Each object that is going to be used as a data component must have a data dep clause defined for it. You probably left one out. something like: object blah blah numbers (or file pointer) attribute dep string positions Chris Pelkie Vice President/Scientific Visualization Producer Conceptual Reality Presentations, Inc. 30 West Meadow Drive Ithaca, NY 14850 [EMAIL PROTECTED]
Re: [opendx-users] Choosing the data array
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
