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triangulation_order1_display.html
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<html>
<head>
<title>
TRIANGULATION_ORDER1_DISPLAY - Plot Triangulated Piecewise Constant Data
</title>
</head>
<body bgcolor="#eeeeee" link="#cc0000" alink="#ff3300" vlink="#000055">
<h1 align = "center">
TRIANGULATION_ORDER1_DISPLAY <br> Plot Triangulated Piecewise Constant Data
</h1>
<hr>
<p>
<b>TRIANGULATION_ORDER1_DISPLAY</b>
is a MATLAB program which
can make a 3D plot of piecewise constant data defined on a mesh of triangles.
</p>
<p>
The input from the user includes:
<ul>
<li>
<b>NODE_XY(1:2,1:NODE_NUM)</b>, a list of the coordinates of nodes;
</li>
<li>
<b>ELEMENT_NODE(1:3,1:ELEMENT_NUM)</b>, a list of the nodes that
make up each element in the mesh;
</li>
<li>
<b>VALUE(1:TRIANGLE_NUM)</b>, the value associated with each element;
</li>
</ul>
</p>
<h3 align = "center">
Usage:
</h3>
<p>
<blockquote>
<b>triangulation_order1_display</b> ( <i>'prefix'</i> )
</blockquote>
where <i>'prefix'</i> is the common file prefix:
<ul>
<li>
<i>'prefix'</i>_nodes.txt, lists the node coordinates;
</li>
<li>
<i>'prefix'</i>_elements.txt lists the indices of nodes that form elements.
</li>
<li>
<i>'prefix'</i>_values.txt lists the value to be assigned each element.
</li>
</ul>
reads the data and makes a plot.
</p>
<h3 align = "center">
Licensing:
</h3>
<p>
The computer code and data files described and made available on this web page
are distributed under
<a href = "../../txt/gnu_lgpl.txt">the GNU LGPL license.</a>
</p>
<h3 align = "center">
Languages:
</h3>
<p>
<b>TRIANGULATION_ORDER1_DISPLAY</b> is available in
<a href = "../../m_src/triangulation_order1_display/triangulation_order1_display.html">a MATLAB version</a>.
</p>
<h3 align = "center">
Related Data and Programs:
</h3>
<p>
<a href = "../../m_src/bezier_surface_display/bezier_surface_display.html">
BEZIER_SURFACE_DISPLAY</a>,
a MATLAB program which
reads two files defining a Bezier surface and displays it
within MATLAB.
</p>
<p>
<a href = "../../m_src/mesh_display/mesh_display.html">
MESH_DISPLAY</a>,
a MATLAB program which
reads data defining a polygonal mesh and displays it, with optional numbering.
</p>
<p>
<a href = "../../m_src/obj_display/obj_display.html">
OBJ_DISPLAY</a>,
a MATLAB program which
reads an OBJ file defining a 3D object and displays it within MATLAB.
</p>
<p>
<a href = "../../m_src/ply_display/ply_display.html">
PLY_DISPLAY</a>,
a MATLAB program which
displays an image of a 3D graphics file in PLY format;
</p>
<p>
<a href = "../../m_src/polygonal_surface_display/polygonal_surface_display.html">
POLYGONAL_SURFACE_DISPLAY</a>,
a MATLAB program which
reads two files defining a polygonal surface and displays it
within MATLAB.
</p>
<p>
<a href = "../../m_src/quad_mesh_order1_display/quad_mesh_order1_display.html">
QUAD_MESH_ORDER1_DISPLAY</a>,
a MATLAB program which
plots piecewise constant data associated with a mesh of quadrilaterals;
</p>
<p>
<a href = "../../m_src/quad_surface_display/quad_surface_display.html">
QUAD_SURFACE_DISPLAY</a>,
a MATLAB program which
reads files defining a 3D quadrilateral mesh surface and displays it
within MATLAB.
</p>
<p>
<a href = "../../m_src/stla_display/stla_display.html">
STLA_DISPLAY</a>,
a MATLAB program which
reads an ASCII STL file defining a 3D object and displays it within MATLAB.
</p>
<p>
<a href = "../../m_src/tet_mesh_display/tet_mesh_display.html">
TET_MESH_DISPLAY</a>,
a MATLAB program
which reads files defining a tet mesh and displays an image
within MATLAB.
</p>
<p>
<a href = "../../m_src/tri_surface_display/tri_surface_display.html">
TRI_SURFACE_DISPLAY</a>,
a MATLAB program which reads data defining a triangular mesh
of a 3D surface and displays it.
</p>
<p>
<a href = "../../m_src/triangulation/triangulation.html">
TRIANGULATION</a>,
a MATLAB library of routines for carrying
out various operations on order 3 ("linear") or order 6
("quadratic") triangulations.
</p>
<p>
<a href = "../../cpp_src/triangulation_display_opengl/triangulation_display_opengl.html">
TRIANGULATION_DISPLAY_OPENGL</a>
is a C++ program which
reads files defining a triangulation and displays an image using Open GL.
</p>
<p>
<a href = "../../m_src/triangulation_node_to_element/triangulation_node_to_element.html">
TRIANGULATION_NODE_TO_ELEMENT</a>,
a MATLAB program which
reads files describing a set of nodes, their triangulation, and the
value of one or more quantities at each node, and outputs a file
that averages the quantities for each element. This operation
in effect creates an "order1" finite element model of the data.
</p>
<p>
<a href = "../../m_src/triangulation_order3_contour/triangulation_order3_contour.html">
TRIANGULATION_ORDER3_CONTOUR</a>,
a MATLAB library which
makes a contour plot of a scalar quantity that is defined on
a finite element mesh of three-node triangles.
</p>
<p>
<a href = "../../m_src/triangulation_order6_contour/triangulation_order6_contour.html">
TRIANGULATION_ORDER6_CONTOUR</a>,
a MATLAB library which
makes a contour plot of a scalar quantity that is defined on
a finite element mesh of six-node triangles.
</p>
<p>
<a href = "../../m_src/triangulation_orient/triangulation_orient.html">
TRIANGULATION_ORIENT</a>,
a MATLAB program
that reads data defining a triangulation, makes sure that
every triangle has positive orientation, and if not, writes a
corrected triangle file.
</p>
<p>
<a href = "../../m_src/triangulation_plot/triangulation_plot.html">
TRIANGULATION_PLOT</a>,
a MATLAB library which
plots the nodes and triangles that make up a finite element
mesh.
</p>
<p>
<a href = "../../m_src/triangulation_quad/triangulation_quad.html">
TRIANGULATION_QUAD</a>,
a MATLAB program which
estimates the integral of a function over a triangulated region.
</p>
<p>
<a href = "../../m_src/triangulation_refine/triangulation_refine.html">
TRIANGULATION_REFINE</a>,
a MATLAB program which
reads data defining a triangulation, replaces each triangle
by four congruent smaller ones, and writes the new triangulation
information to a file.
</p>
<h3 align = "center">
Source Code:
</h3>
<p>
<ul>
<li>
<a href = "triangulation_order1_display.m">
triangulation_order1_display.m</a>,
displays a 3D plot of piecewise data on a mesh of triangles.
</li>
</ul>
</p>
<h3 align = "center">
Examples and Tests:
</h3>
<p>
<b>EXAMPLE1</b> is a set of node, element and value data.
Files you may copy include:
<ul>
<li>
<a href = "example1_nodes.txt">
example1_nodes.txt</a>, the coordinates of the nodes.
</li>
<li>
<a href = "example1_elements.txt">
example1_elements.txt</a>, the indices of nodes that make the elements.
</li>
<li>
<a href = "example1_values.txt">
example1_values.txt</a>, the value associated with each element.
</li>
<li>
<a href = "example1.png">
example1.png</a>,
a PNG image of the MATLAB plot.
</li>
</ul>
</p>
<p>
<b>EXAMPLE2</b> is a set of node, element and value data.
Files you may copy include:
<ul>
<li>
<a href = "example2_nodes.txt">
example2_nodes.txt</a>, the coordinates of the nodes.
</li>
<li>
<a href = "example2_elements.txt">
example2_elements.txt</a>, the indices of nodes that make the elements.
</li>
<li>
<a href = "example2_values.txt">
example2_values.txt</a>, the value associated with each element.
</li>
<li>
<a href = "example2.png">
example2.png</a>,
a PNG image of the MATLAB plot.
</li>
</ul>
</p>
<p>
You can go up one level to <a href = "../m_src.html">
the MATLAB source codes</a>.
</p>
<hr>
<i>
Last revised on 24 May 2006.
</i>
<!-- John Burkardt -->
</body>
</html>