Latitude/Longitude Quadrilateral Grids on a Sphere

**SPHERE_LLQ_GRID**,
a C library which
constructs a grids of quadrilaterals using latitude and longitude lines
over the surface of a sphere in 3D.

The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.

**SPHERE_LLQ_GRID** is available in
a C version and
a C++ version and
a FORTRAN90 version and
a MATLAB version and
a Python version.

BALL_GRID, a C library which computes a grid of points over the interior of a ball in 3D.

CIRCLE_ARC_GRID, a C program which computes points equally spaced along a circular arc;

CUBE_GRID, a C library which computes a grid of points over the interior of a cube in 3D.

DISK_GRID, a C library which computes a grid of points over the interior of a disk in 2D.

ELLIPSE_GRID, a C library which computes a grid of points over the interior of an ellipse in 2D.

ELLIPSOID_GRID, a C library which computes a grid of points over the interior of an ellipsoid in 3D.

HYPERCUBE_GRID, a C library which computes a grid of points over the interior of a hypercube in M dimensions.

LINE_GRID, a C library which computes a grid of points over the interior of a line segment in 1D.

POLYGON_GRID, a C library which generates a grid of points over the interior of a polygon in 2D.

PYRAMID_GRID, a C library which computes a grid of points over the interior of the unit pyramid in 3D;

SIMPLEX_GRID, a C library which generates a grid of points over the interior of a simplex in M dimensions.

SPHERE_FIBONACCI_GRID, a C library which computes a grid of points using the Fibonacci spiral over the surface of a sphere in 3D.

SPHERE_GRID, a C library which computes a grid of points over the surface of a sphere in 3D.

SPHERE_LLT_GRID, a C library which computes a grid of triangles bounded by latitude and longitude lines over the surface of a sphere in 3D.

SQUARE_GRID, a C library which computes a grid of points over the interior of a square in 2D.

TETRAHEDRON_GRID, a C library which computes a grid of points over the interior of a tetrahedron in 3D.

TRIANGLE_GRID, a C library which computes a grid of points over the interior of a triangle in 2D.

WEDGE_GRID, a C library which computes a grid of points over the interior of the unit wedge in 3D.

- sphere_llq_grid.c, the source code.
- sphere_llq_grid.sh, compiles the source code.
- sphere_llq_grid.h, the include file