Collaboration diagram for Importing Unstructured Grids:
Introduction
An unstructured grid entity depends on a contiguously numbered (0..N-1) collection of XYZ values know as an unstructured vertex list. All unstructured grid entites associated with a given unstructured vertex list define their element connectivity using indices into this shared list. Though uncommon, the creation of multiple, distinct unstructured vertex lists is supported. Each list can have its own collection of topologically distinct, unstructured grid entities. An unstructured vertex list must be created before its associated unstructured grid entities can be created. An element cannot be added to an unstructured grid entity until after the XYZ values indexed by the element have been added to the unstructured vertex list.
Creating an Unstructured Vertex List
- Create an unstructured vertex list using PwModCreateUnsVertexList(), PwModCreateUnsVertexList3(), or PwModCreateUnsVertexList2().
- Set the number of vertices in the unstructured vertex list using PwVlstAllocate().
- Load the XYZ values into the unstructured vertex list using PwVlstSetXYZVal(), PwVlstSetXYZ(), or PwVlstSetXYZData().
Creating an Unstructured Grid Entity from Elements
- Create an unstructured entity using PwVlstCreateUnsBlock(), PwVlstCreateUnsDomain(), or PwVlstCreateUnsBoundary().
- Set the number of elements by type using PwUnsBlkAllocateElements() or PwUnsDomAllocateElements().
- Load the element connectivity into the unstructured entity using PwUnsBlkSetElement() or PwUnsDomSetElement().
Creating an Unstructured Grid Entity from Faces
- Create an unstructured grid assembler using PwVlstCreateBlockAssembler().
- Add element faces to the assembler using PwAsmPushElementFace().
- After adding the last face, call PwAsmFinalize() to stitch the faces together into unstuctured grid entities.