extrude

The extrude module accepts any mesh and adds one to the dimensionality of the input by extruding the mesh in the Z direction. The interface enables changing the height scale for extruded cells and extruding by a constant, any nodal or cell data component. This module is often used with the import vector gis module to convert polygonal shapefiles into extruded volumetric cells.

When Node Data Component is chosen, the output cells will be extruded by the Scale Factor times the value of whichever nodal data component is selected on the right. With nodal data extrusion you must select "Positive Extrusions Only" or "Negative Extrusions Only". Since each node of a triangle or quadrilateral can have different values, it is possible for a single cell to have both positive and negative data values at its nodes. If this type of cell is extruded both directions, the cell topology can become tangled.

For this reason, nodal data extrusions must be limited to one direction. To extrude in both directions, merely use two extrude modules in parallel, one set to positive and the other to negative.

Module Input Ports

• Input Field [Field] Accepts a field with or without data

Module Output Ports

• Output Field [Field / Minor] Outputs the field
• Output Object [Renderable]: Outputs to the viewer