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<html>
<head>
<title>
ELLIPSE_GRID - Grid Points Within an Ellipse
</title>
</head>
<body bgcolor="#EEEEEE" link="#CC0000" alink="#FF3300" vlink="#000055">
<h1 align = "center">
ELLIPSE_GRID <br> Grid Points Within an Ellipse
</h1>
<hr>
<p>
<b>ELLIPSE_GRID</b>
is a Python library which
generates a grid of points
over the interior of an ellipse in 2D.
</p>
<p>
The library allows the user to define an ellipse by
choosing its center and the length of its major and minor axes.
The user also choose N, the number of subintervals into which the
minor radius will be subdivided. It then returns the gridpoints
defined by that choice.
</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>ELLIPSE_GRID</b> is available in
<a href = "../../c_src/ellipse_grid/ellipse_grid.html">a C version</a> and
<a href = "../../cpp_src/ellipse_grid/ellipse_grid.html">a C++ version</a> and
<a href = "../../f77_src/ellipse_grid/ellipse_grid.html">a FORTRAN77 version</a> and
<a href = "../../f_src/ellipse_grid/ellipse_grid.html">a FORTRAN90 version</a> and
<a href = "../../m_src/ellipse_grid/ellipse_grid.html">a MATLAB version</a> and
<a href = "../../py_src/ellipse_grid/ellipse_grid.html">a Python version</a>.
</p>
<h3 align = "center">
Related Data and Programs:
</h3>
<p>
<a href = "../../py_src/ball_grid/ball_grid.html">
BALL_GRID</a>,
a Python library which
computes a grid of points
over the interior of a ball in 3D.
</p>
<p>
<a href = "../../py_src/circle_arc_grid/circle_arc_grid.html">
CIRCLE_ARC_GRID</a>,
a Python library which
computes a grid of points
along a circle or circular arc in 2D.
</p>
<p>
<a href = "../../py_src/cube_grid/cube_grid.html">
CUBE_GRID</a>,
a Python library which
computes a grid of points
over the interior of a cube in 3D.
</p>
<p>
<a href = "../../py_src/disk_grid/disk_grid.html">
DISK_GRID</a>,
a Python library which
computes a grid of points
over the interior of a disk in 2D.
</p>
<p>
<a href = "../../m_src/ellipse_monte_carlo/ellipse_monte_carlo.html">
ELLIPSE_MONTE_CARLO</a>
a MATLAB library which
uses the Monte Carlo method to estimate the value of integrals
over the interior of an ellipse in 2D.
</p>
<p>
<a href = "../../py_src/ellipsoid_grid/ellipsoid_grid.html">
ELLIPSOID_GRID</a>,
a Python library which
computes a grid of points
over the interior of an ellipsoid in 3D.
</p>
<p>
<a href = "../../py_src/hypercube_grid/hypercube_grid.html">
HYPERCUBE_GRID</a>,
a Python library which
computes a grid of points
over the interior of a hypercube in M dimensions.
</p>
<p>
<a href = "../../py_src/line_grid/line_grid.html">
LINE_GRID</a>,
a Python library which
computes a grid of points
over the interior of a line segment in 1D.
</p>
<p>
<a href = "../../py_src/polygon_grid/polygon_grid.html">
POLYGON_GRID</a>,
a Python library which
generates a grid of points
over the interior of a polygon in 2D.
</p>
<p>
<a href = "../../py_src/pyramid_grid/pyramid_grid.html">
PYRAMID_GRID</a>,
a Python library which
computes a grid of points
over the interior of the unit pyramid in 3D;
</p>
<p>
<a href = "../../py_src/simplex_grid/simplex_grid.html">
SIMPLEX_GRID</a>,
a Python library which
generates a regular grid of points
over the interior of an arbitrary simplex in M dimensions.
</p>
<p>
<a href = "../../py_src/sphere_fibonacci_grid/sphere_fibonacci_grid.html">
SPHERE_FIBONACCI_GRID</a>,
a Python library which
uses a Fibonacci spiral to create a grid of points
on the surface of the unit sphere in 3D.
</p>
<p>
<a href = "../../py_src/sphere_llq_grid/sphere_llq_grid.html">
SPHERE_LLQ_GRID</a>,
a Python library which
uses longitudes and latitudes to create grids of points,
lines, and quadrilaterals
on the surface of the unit sphere in 3D.
</p>
<p>
<a href = "../../py_src/sphere_llt_grid/sphere_llt_grid.html">
SPHERE_LLT_GRID</a>,
a Python library which
uses longitudes and latitudes to create grids of points,
lines, and triangles
on the surface of the unit sphere in 3D.
</p>
<p>
<a href = "../../py_src/square_grid/square_grid.html">
SQUARE_GRID</a>,
a Python library which
computes a grid of points
over the interior of a square in 2D.
</p>
<p>
<a href = "../../py_src/tetrahedron_grid/tetrahedron_grid.html">
TETRAHEDRON_GRID</a>,
a Python library which
computes a grid of points
over the interior of a tetrahedron in 3D.
</p>
<p>
<a href = "../../py_src/triangle_grid/triangle_grid.html">
TRIANGLE_GRID</a>,
a Python library which
computes a grid of points
over the interior of a triangle in 2D.
</p>
<p>
<a href = "../../py_src/wedge_grid/wedge_grid.html">
WEDGE_GRID</a>,
a Python library which
computes a grid of points
over the interior of the unit wedge in 3D.
</p>
<h3 align = "center">
Source Code:
</h3>
<p>
<ul>
<li>
<a href = "ellipse_grid_points.py">ellipse_grid_points.py</a>,
computes grid points inside an ellipse.
</li>
<li>
<a href = "ellipse_grid_count.py">ellipse_grid_count.py</a>,
counts grid points inside an ellipse.
</li>
<li>
<a href = "ellipse_grid_display.py">ellipse_grid_display.py</a>,
displays grid points inside an ellipse.
</li>
<li>
<a href = "r82vec_print_part.py">r82vec_print_part.py</a>,
prints part of a vector of (X,Y) data.
</li>
<li>
<a href = "r8mat_transpose_write.py">r8mat_transpose_write.py</a>,
writes the transpose of an R8MAT to a file.
</li>
<li>
<a href = "timestamp.py">timestamp.py</a>,
prints the current YMDHMS date as a time stamp.
</li>
</ul>
</p>
<h3 align = "center">
Examples and Tests:
</h3>
<p>
<ul>
<li>
<a href = "ellipse_grid_test.py">ellipse_grid_test.py</a>,
calls all the tests.
</li>
<li>
<a href = "ellipse_grid_test.sh">ellipse_grid_test.sh</a>,
runs all the tests.
</li>
<li>
<a href = "ellipse_grid_test_output.txt">ellipse_grid_test_output.txt</a>,
the output file.
</li>
<li>
<a href = "ellipse_grid.xy">ellipse_grid.xy</a>,
the list of grid points.
</li>
<li>
<a href = "ellipse_grid.png">ellipse_grid.png</a>,
an image of the points.
</li>
<li>
<a href = "ellipse_grid_display.png">ellipse_grid_display.png</a>,
an image of the points used for a demonstration of ellipse_grid_display.
</li>
</ul>
</p>
<p>
You can go up one level to <a href = "../py_src.html">
the Python source codes</a>.
</p>
<hr>
<i>
Last revised on 08 April 2015.
</i>
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