ParaView 3 Telecon 05/08/2007

Item	People	Description
1	All	ParaView 3.2 Deliverables Progress
2	Weirs	V&V Scripting
3	Karelitz	Use Logarithmic Scale greyed out
4	All	Open level 4 bugs
5	Moreland	Resolved bugs
6	Moreland	Animation GUI

V&V Scripting

Greg Weirs is a user of PV who knows little of PV and VTK code. Greg has been the primary V&V driver. Most of our V&V request come indirectly from him.

He is trying to use PV to do quantitative analysis. He wants the dynamic interaction that PV provides while being able to write scripts in the programmable filter. Once he gets the information he desires through PV, he is trying to repeat that for other data. Right now, he is using Python scripting to do so.

The scripts written so far are the same basic operations done in the GUI. They use the programmable filter fairly heavily. The chalanging parts:

• The pipeline/visualization model is different that what Greg and his colleagues are used to. It is difficult for him to match his problem description (e.g. pull some values out of an array) to the PV paradigms.
• The multiple passes of the pipeline (REQUEST_INFORMATION, REQUEST_DATA, etc) are confusing.
• PV and VTK tend to think in the global sense in that you attach filters to the entire data set. In the V&V analysis world, you are often focused on the cell level (it's values, its neighbors, etc.).

Only major request: there is no direct access form the GUI to the data model (cells, points, connectivity, fields, etc.).