496 lines
17 KiB
HTML
496 lines
17 KiB
HTML
<html lang="en-gb" dir="ltr">
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<head>
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<title>LaGriT</title>
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<meta name="description" content="LaGriT : LaGriT is a library providing mesh generation and optimization for a variety of polyhedra and dimensions.">
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LaGriT
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'descriptiveWords' : 20,
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<!-- Main Body text -->
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<div class="tm-main uk-section uk-section-default">
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<div class="uk-container uk-container-small uk-position-relative">
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<p><img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/arrow2.gif" />“30”
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“30”](http://www.ees.lanl.gov/staff/rao/mstkla/mstkla.md#MSTKLA_Init) <img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/arrow3.gif" />“30”
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“30”](http://www.ees.lanl.gov/staff/rao/mstkla/prelim.md) <img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/arrow4.gif" />“30”
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“30”](http://www.ees.lanl.gov/staff/rao/mstkla/MeshRegion.md)</p>
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<hr />
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<hr />
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<p><strong>MESH INITIALIZATION:</strong> </p>
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<hr />
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<p> </p>
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<p><em>void</em> <strong>MSTKLA_Init</strong>(<em>void</em>);</p>
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<p>Initialize the mesh toolkit.</p>
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<hr />
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<hr />
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<p><strong>MESH OPERATORS</strong></p>
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<p> </p>
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<p>These operators work on variables of type <em>PMeshObj.</em></p>
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<hr />
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<p><em>PMeshObj</em> <strong>MESH_Create</strong>();</p>
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<p>Creates a default mesh object and returns it - At this point all the
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info</p>
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<p>in it is useless.</p>
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<hr />
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<p><em>void</em> <strong>MESH_InitFromFile</strong>(<em>PMeshObj</em> mesh, *char
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**filename, *char</p>
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<p><em>*format, *int</em> iotype, *char
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*
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**name);</p>
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<p>Read a mesh in from “<em>filename</em>” and initialize the “<em>mesh</em>”.</p>
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<p>The file is in the format “<em>format</em>” (“<em>lagrit</em>” for LaGriT dumps,
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“<em>gmv</em>” for GMV files, “<em>avs</em>” for AVS files).</p>
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<p><em>‘iotype’</em> is 1 for ascii and 0 for binary.</p>
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<p>‘<em>name</em>’ is the name of the mesh that is read and returned</p>
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<p>If a LaGriT file is read, the geometric model info will be read as well.</p>
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<hr />
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<p><em>void</em> <strong>MESH_InitFromCMO</strong>(<em>PMeshObj</em> mesh, <em>char</em>
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*cmoname);</p>
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<p>Initialize the mesh object from a given cmo. If ‘<em>cmoname</em>’ is NULL (say
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sent in as the character string ), the mesh object is initialized from
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the default mesh object. If not the given cmo is made is active and the
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mesh object is</p>
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<p>initialized from that.</p>
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<p><img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/note1.gif" />“31” “32”This implies that
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sometime in the middle of a LaGriT subroutine, one can call a C routine
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which initializes a mesh object and then uses the functionality of
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MSTKLA!! (Cool!)</p>
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<hr />
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<p><em>int</em> <strong>MESH_Select</strong>(<em>PMeshObj</em> mesh);</p>
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<p>Make a particular mesh object active</p>
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<hr />
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<p><em>void</em> <strong>MESH_Delete</strong>(<em>PMeshObj</em> mesh);</p>
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<p>Delete a particular mesh object.</p>
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<p><img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/note1.gif" />“31” “32”
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*</p>
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<ul>
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<li>NOT YET IMPLEMENTED</li>
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</ul>
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<p>*</p>
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<ul>
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<li>WILL BE IN SOON</li>
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</ul>
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<hr />
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<p><em>void</em> <strong>MESH_WriteToFile</strong>(<em>PMeshObj</em> mesh, <em>char</em>
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<em>filename, *char</em></p>
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<p><em>format, *int</em> iotype);</p>
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<p><img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/note1.gif" />“31” “32”
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*</p>
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<ul>
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<li>NOT YET IMPLEMENTED</li>
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</ul>
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<p>*</p>
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<ul>
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<li>WILL BE IN SOON
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*
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*</li>
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</ul>
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<hr />
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<p><em>PMeshObj</em> <strong>MESH_Duplicate</strong>(<em>PMeshObj</em> mesh);</p>
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<p><img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/note1.gif" />“31” “32”
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*</p>
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<ul>
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<li>NOT YET IMPLEMENTED</li>
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</ul>
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<p>*
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*</p>
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<hr />
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<p><em>int</em> <strong>MESH_NumVertices</strong>(<em>PMeshObj</em> mesh);</p>
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<p>Number of vertices (nodes) in the mesh.</p>
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<p><img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/bullet12.gif" />“27” “31”
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*
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*</p>
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<ul>
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<li>IMPORTANT</li>
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</ul>
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<p>*
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*
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*</p>
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<p>This count may include deleted vertices, parent vertices and other</p>
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<p>types of vertices that should be ignored. So when looping through</p>
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<p>vertices of a mesh, one should check if the vertex is to be ignored</p>
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<p>by checking if MV_Type returns VIGNORE or VDELETED.</p>
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<hr />
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<p><em>int</em> <strong>MESH_NumRegions</strong>(<em>PMeshObj</em> mesh);</p>
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<p>Number of regions (elements) in the mesh.</p>
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<p><img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/bullet12.gif" />“27” “31”
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*
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*</p>
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<ul>
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<li>IMPORTANT</li>
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</ul>
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<p>*
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*
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*</p>
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<p>This count may include deleted regions. While looping through the</p>
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<p>regions of a mesh, one should check if the region is to be ignored</p>
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<p>by checking if MR_Type returns RDELETED.</p>
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<hr />
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<p><em>PMeshVert</em> <strong>MESH_Vertex</strong>(<em>PMeshObj</em> mesh, <em>int</em> i);</p>
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<p>Fetch the i’th vertex (node) of the mesh (This is C so remember i</p>
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<p>starts from 0) The returned mesh vertex object can be queried for</p>
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<p>information. The returned vertex must always be checked for its type</p>
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<p>to see if it deleted or must otherwise be ignored.</p>
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<hr />
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<p><em>PMeshRegn</em> <strong>MESH_Region</strong>(<em>PMeshObj</em> mesh, <em>int</em> i);</p>
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<p>Fetch the i’th region (element) of the mesh. The returned mesh region</p>
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<p>can be queried for information. The returned region must be checked if</p>
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<p>it is a deleted region.</p>
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<hr />
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<p><em>void</em> <strong>MESH_BldUpAdj</strong>(<em>PMeshObj</em> mesh);</p>
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<p>Build the vertex to region connectivity. This will allow upward</p>
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<p>adjacency operator MV_Regions to be called. In fact those operators</p>
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<p>will function properly only after this is called.</p>
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<hr />
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<p><em>void</em> <strong>MESH_DelUpAdj</strong>(<em>PMeshObj</em> mesh);</p>
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<p>Delete the vertex to region connectivity information to save</p>
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<p>memory. It is not possible for MSTKLA to determine when this</p>
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<p>information is not needed and call this routine automatically.</p>
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<hr />
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<p><em>void</em> <strong>MESH_IncrNodeLists</strong>(<em>PMeshObj</em> mesh);</p>
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<p>Increment all the node lists.</p>
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<p><img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/note1.gif" />“31” “32”(
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*</p>
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<ul>
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<li>NOT FULLY TESTED</li>
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</ul>
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<p>*
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*)</p>
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<hr />
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<p><em>void</em> <strong>MESH_IncrElemLists</strong>(<em>PMeshObj</em> mesh);</p>
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<p>Increment all the element lists.</p>
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<p><img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/note1.gif" />“31” “32”(
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*</p>
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<ul>
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<li>NOT FULLY TESTED</li>
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</ul>
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<p>*
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*)</p>
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<hr />
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<p><em>void</em> <strong>MESH_CmprNodeLists</strong>(<em>PMeshObj</em> mesh);</p>
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<p>Compress all the element lists.</p>
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<p><img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/note1.gif" />“31” “32”
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*
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*</p>
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<ul>
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<li>NOT YET
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IMPLEMENTED
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*
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*
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*</li>
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</ul>
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<p><img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/bullet12.gif" />“27” “31”
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*
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*</p>
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<ul>
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<li>IMPORTANT !!!</li>
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</ul>
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<p>*
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*
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*</p>
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<p>There is one side effect of compression of lists. If one is storing a</p>
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<p>list of node numbers or PMeshVerts (which for the LaGriT interface are</p>
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<p>just integers cast as pointers), then after compression, the node</p>
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<p>numbers or PMeshVert “addresses” may not be referring to the nodes you</p>
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<p>think they are.</p>
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<hr />
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<p><em>void</em> <strong>MESH_CmprElemLists</strong>(<em>PMeshObj</em> mesh);</p>
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<p>Compress all the element lists.
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*
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*</p>
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<ul>
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<li>NOT YET IMPLEMENTED
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*
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*
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*</li>
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</ul>
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<p><img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/bullet12.gif" />“27” “31”
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*
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*</p>
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<ul>
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<li>IMPORTANT !!!</li>
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</ul>
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<p>*
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*
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*</p>
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<p>There is one side effect of compression of lists. If one is storing a</p>
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<p>list of element numbers or PMeshRegns (which for the LaGriT interface</p>
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<p>are just integers cast as pointers), then after compression, the</p>
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<p>element numbers or PMeshRegn “addresses” may not be referring to the</p>
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<p>elements you think they are.</p>
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<p> </p>
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<p>
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<img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/arrow2.gif" />“30”
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“30”](http://www.ees.lanl.gov/staff/rao/mstkla/mstkla.md#MSTKLA_Init) <img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/arrow3.gif" />“30”
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“30”](http://www.ees.lanl.gov/staff/rao/mstkla/prelim.md) <img height="300" width="300" src="https://lanl.github.io/LaGriT/assets/images/arrow4.gif" />“30”
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“30”](http://www.ees.lanl.gov/staff/rao/mstkla/MeshRegion.md)</p>
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</div>
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</div>
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