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<A HREF = "index.html">[Index for ./FEM]</A> |
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<H1>which_elem</H1> |
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<H2>(./FEM/which_elem.m)</H2> |
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<HR><H3>Function Synopsis</H3> |
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<pre>j=which_elem(fem_grid_struct,xylist)</pre> |
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<HR><H3>Help text</H3> |
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<pre> |
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WHICH_ELEM determine bounding finite element in given domain |
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WHICH_ELEM finds the element number for the |
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current mouse position. WHICH_ELEM 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. |
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In determining which element has been selected, |
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WHICH_ELEM 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 WHICH_ELEM 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=which_elem(<A HREF = "../3.FEM/fem_grid_struct.html">fem_grid_struct</A>) for interactive |
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or |
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>> j=which_elem(<A HREF = "../3.FEM/fem_grid_struct.html">fem_grid_struct</A>,xylist) |
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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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