CIRCLE_RULE is a C++ library which computes quadrature rules over the circumference of the unit circle in 2D.
The user specifies the value NT, the number of equally spaced angles. The program returns vectors T(1:NT) and W(1:NT), which define the rule Q(f).
Given NT and the vectors T and W, the integral I(f) of a function f(x,y) is estimated by Q(f) as follows:
q = 0.0 for i = 1, nt x = cos ( t(i) ) y = sin ( t(i) ) q = q + w(j) * f ( x, y ) end
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
CIRCLE_RULE is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version.
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CIRCLE_ARC_GRID, a C++ program which computes points equally spaced along a circular arc;
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PYRAMID_FELIPPA_RULE, a C++ library which returns Felippa's quadratures rules for approximating integrals over the interior of a pyramid in 3D.
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STROUD, a C++ library which defines quadrature rules for a variety of M-dimensional regions, including the interior of the square, cube and hypercube, the pyramid, cone and ellipse, the hexagon, the M-dimensional octahedron, the circle, sphere and hypersphere, the triangle, tetrahedron and simplex, and the surface of the circle, sphere and hypersphere.
TETRAHEDRON_FELIPPA_RULE, a C++ library which returns Felippa's quadratures rules for approximating integrals over the interior of a tetrahedron in 3D.
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TRIANGLE_FELIPPA_RULE, a C++ library which returns Felippa's quadratures rules for approximating integrals over the interior of a triangle in 2D.
WEDGE_FELIPPA_RULE, a C++ library which returns quadratures rules for approximating integrals over the interior of the unit wedge in 3D.
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