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SOFTWARE ABSTRACT

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PACKAGE ID001107MLTPL00 GRIZ*
KWIC TitleFinite Element Results Visualization for Unstructured Grids 
AUTHORSDouglas E. Speck; Donald J. Dovey
LIMITATION/AUDIENCE CODECOPY/LIM
COMPLETION DATE08/01/1996 
PUBLICATION DATE07/15/1996 
DESCRIPTIONGRIZ is a general-purpose post-processing application supporting interactive visualization of finite element analysis results on unstructured grids. In addition to basic pseudocolor renderings of state variables over the mesh surface, GRIZ provides modern visualization techniques such as isocontours and isosurfaces, cutting planes, vector field display, and particle traces. GRIZ accepts both command-line and mouse-driven input, and is portable to virtually any UNIX platform which provides Motif and OpenGl libraries. 
PACKAGE CONTENTSMedia Directory; Software Abstract; Installation Guides for SUN, and IBM; Media Includes Source Code, Compilation Instructions, Linking Instructions, User Guide; 1 CD ROM 
SOURCE CODE INCLUDED?
MEDIA QUANTITY
METHOD OF SOLUTIONGRIZ interpolates element-based results back to the mesh nodes using volume-weighted averaging. The nodal values are used to interpolate into a colormap to determine the color at each node. Visible element faces, with their associated vertex (nodal) colors are rendered using the OpenGL graphics library. 
COMPUTERMLT-PLTFM 
OPERATING SYSTEMSUNIX 
SOFTWARE LIMITATIONSLimited by constraints of dynamic memory allocation on host computer. 
RELATED SOFTWARESupersedes TAURUS finite element post-processor. Input files created in TAURUS Plotfile Format by finite element analysis codes DYNA, NIKE, and TOPAZ. 
UNIQUE FEATURESVisualization of 3D and 2D engineering results on unstructured grids; fringe (pseudocolor) plots; isosurfaces; isocontours; cutting planes; vector field display; vector carpets; particle traces; reflection planes; time-series plots; results animation; flexible control by material; flexible lighting; graphical and command-line control; hardcopy and image file output; scripting. 
OTHER PROG/OPER SYS INFORequires Motif and OpenGL libraries. The DIGLIB code is included with the package. 
REFERENCESDouglas E. Speck and Donald J Dovey, GRIZ, Finite Element Analysis Results Visualization for Unstructured Grids, User Manual, UCRL-MA-115696 Rev.1, March 1996. 
HARDWARE REQSThe source distribution requires 8.22 Mbytes, uncompressed. However, only 20% of this is required for compilation; the rest is documentation and sample data files. The binary (32-bit) is approximately 500 Kbyte. Additional memory requirements during execution are dependent upon the size of the finite element mesh being post-processed. 
TIME REQUIREMENTSInitialization and rendering are highly dependent upon the size of the finite element mesh being post-processed, the type (s) of elements in the mesh, and the availability of hardware acceleration for rendering operations. Small meshes (less than 1000 elements) may take only seconds to initialize and each frame may render in much less than a second; very large meshes (>500000 elements) may take 20 minutes or more to initialize and 10 minutes or more to render each frame. 
ABSTRACT STATUSSubmitted July 1996. Released screened 8/8/96. 
SPONSORDOE/ER 
RESEARCH ORGLawrence Livermore National Laboratory 
PACKAGE TYPESCREENED 

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