Pointwise's structured solver for domains is a true "surface" solver, in that grid points are inserted directly on a specified geometrical shape (the database). The options in this frame are used to specify the manner in which that shape is maintained during solution.
The Shape pull down list contains the following options:
The Projection Method option determines how grid points are moved onto the database. There are two choices:
Note: The projection type selected for the Edit, Project command will be stored as an attribute of a domain so that when using Grid, Solve, the Projection Method will default to the same.
Once the Projection Method has been specified, it is time to define the orientation of such projection. To this end, you can use the options provided in the Projection Orientation section of the frame.
The Set button becomes enabled when the Projection Method is set to Linear and the Use Default checkbox (explained below) is unchecked. When this button is pressed, it indicates that the domain grid points will be projected onto the specified database surface along a fixed vector perpendicular to the Display window (screen-z)
The Use Default checkbox is used to indicate whether the default projection orientation should be used (option checked on) or not (option unchecked). Note that the default projection orientation is computed by averaging the grid's normal vector at each grid point.
In the Target Database Selction frame, Begin allows you to select the target projection entities from all those currently visible. After this button is pressed you can select database entities from either the List panel or Display window. The current set of target entities is already picked when the button is first pressed. The button remains depressed with the text End now displayed. Pressing End stops selection of projection database entities.
The Use Default button in this frame is used to indicate whether the domain grid points will be projected onto the default set of database entities or not. The default database entities are computed for each grid based on which entities are currently referenced by the domain's grid points, both on the interior and the domain's bounding connectors.