This section describes the use of a suite of VisTools modules termed “global” modules. These modules are designed to provide sevices for managing solution domain and results data for an entire discretized mathematical model. These modules support finite element (unstructured) grids. For finite element analysis systems, the global modules form a complete set of data structures for model and results information. A summary of the basic features of the global modules appear below:
Element (cell) connectivity and adjacency management for unstructured and structured grid topologies.
Store and query node and element associations such as material identifier, analysis coordinate system identifier, etc.
Query for external faces, unique edges, feature edges, etc. for any model subset.
Support for curvilinear, rectilinear and uniform structured grids.
Generate and manage element, face, edge and node subsets. Perform Boolean operations on subsets.
Support user defined entity identifier to sequential index translation, (arbitrary node and element numbers).
Manipulation of scalar, vector and tensor field data. Provide for mapping of fields between nodes, elements and element nodes. Compute invariants of vector and tensor fields.
Manipulation and storage of sparse scalar, vector and tensor field data based at element faces and element edges.
Quick searching over the spatial domain or results range for lists of entities which have a set of properties.
Comprehensive data structures for full model features such as load and constraint cases, element, material and solution properties, coordinate systems and units.
Compute element shape parameters and perform connectivity consistency checking.
1.1. Module Summary
The global modules are designed to be integrated into existing engineering pre and/or post processing systems or used as a comprehensive code base for building new engineering systems. The modules may be used in existing visualization software systems, finite element pre/post processors or visual data analysis systems with minimal impact upon established data structures. Major data structures such as element connectivity and node coordinate arrays may be maintained by the host application or managed by a global module. The modules currently delivered as VisTools global modules are as follows.
Grid Topology and Geometry
Connect - Finite element (unstructured) grids
GridFun - Define grid function pointers to host grid (domain) data
Entity Sets and Identifier Translation
Group - Manage entity sets
IdTran - Perform identifier translation and manage entity lists
ElemDat - Manage element face and edge data
History - Manage history results
State - Manage solution results
RedMat - Manage system degree of freedom vectors and matrices
ZState - Results compression
Space and Range Searching
Space - Spatial searching
Range - Range searching
Load, Constraints and Initial Condition Cases
LCase - Load Case
RCase - Restraint Case
MCase - Multipoint Constraint Case
ICase - Initial Condition Case
CPair - Contact Pairs
APair - Analytic Surfaces.
Element, Material, Solution and General Properties
EProp - Element Properties
MProp - Material Properties
SProp - Solution Properties
TCurve - Tabular Functions
RProp - Results Properties
GProp - General Properties
UProp - User Properties
CoordSys - Coordinate Systems
CPair - Contact Pairs
ASurf - Analytic Surfaces.
RBody - Rigid Bodies
Units - Units
Model - Finite element model encapsulation
ElemChk - Element checking
MassPrp - Mass properties