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<TITLE>/</TITLE> |
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<BODY> |
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<A HREF = "index.html">[Index for ./FEM]</A> |
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<A HREF = "../index.html">[Return to Master Index]</A> |
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<H1>findelem</H1> |
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<H2>(./FEM/findelem.m)</H2> |
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<HR><H3>Function Synopsis</H3> |
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<pre>j=findelem(fem_grid_struct,xylist)</pre> |
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<HR><H3>Help text</H3> |
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<pre> |
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FINDELEM element finding utility |
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FINDELEM finds the element number for the |
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current mouse position. FINDELEM prompts |
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the user to click on the current axes and returns |
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the element for the "click-on" position, or NaN |
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if the click is outside the domain. |
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|
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Alternatively, a list of horizontal points can |
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be passed in and a list of element numbers, one for |
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each input point, will be returned; NaN is returned |
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for each point outside of the FEM domain. |
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|
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In determining which element has been selected, |
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FINDELEM needs elemental areas and shape functions. |
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The routines <A HREF = "../3.FEM/belint.html">BELINT</A> and <A HREF = "../3.FEM/el_areas.html">EL_AREAS</A> compute these arrays |
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and add them to a previously created <A HREF = "../3.FEM/fem_grid_struct.html">fem_grid_struct</A>. |
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These two functions MUST be run before FINDELEM will |
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run. |
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<A HREF = "../3.FEM/belint.html">BELINT</A> is run as: |
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new_struct=<A HREF = "../3.FEM/belint.html">belint</A>(<A HREF = "../3.FEM/fem_grid_struct.html">fem_grid_struct</A>); |
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<A HREF = "../3.FEM/el_areas.html">EL_AREAS</A> is run as: |
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[new_struct,ineg]=<A HREF = "../3.FEM/el_areas.html">el_areas</A>(<A HREF = "../3.FEM/fem_grid_struct.html">fem_grid_struct</A>); |
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INPUT : <A HREF = "../3.FEM/fem_grid_struct.html">fem_grid_struct</A> - (from <A HREF = "../3.FEM/loadgrid.html">LOADGRID</A>, see <A HREF = "../3.FEM/fem_grid_struct.html">FEM_GRID_STRUCT</A>) |
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xylist - points to find elements for [n x 2 double] |
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OUTPUT : an element number(s) |
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CALL : >> j=findelem(<A HREF = "../3.FEM/fem_grid_struct.html">fem_grid_struct</A>) for interactive |
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OR >> j=findelem(<A HREF = "../3.FEM/fem_grid_struct.html">fem_grid_struct</A>,xylist) |
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|
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Written by : Brian O. Blanton |
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Summer 1997 |
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|
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</pre> |
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<HR><H3>Cross-Reference Information</H3>This function calls |
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<pre><UL> |
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<LI><A HREF = "../3.FEM/is_valid_struct.html">is_valid_struct</A>./FEM/is_valid_struct.m</LI> |
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<LI><A HREF = "../3.FEM/is_valid_struct2.html">is_valid_struct2</A>./FEM/is_valid_struct2.m</LI> |
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</UL></pre> |
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This function is called by |
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<pre><UL> |
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<LI><A HREF = "../3.FEM/basis2d.html">basis2d</A> ./FEM/basis2d.m</LI> |
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<LI><A HREF = "../3.FEM/showelem.html">showelem</A> ./FEM/showelem.m</LI> |
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</UL></pre> |
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<HR> |
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Produced by <A HREF="http://www.nd.edu/Courses/kantor/matlab/mat2html">mat2html</A> on Tue Feb 2 16:15:45 EST 1999 |
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<BR> |
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Cross-Directory links are: OFF<BR> |
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