_compute_sphere_overlap(d, r1, r2)
See for example http://mathworld.wolfram.com/Sphere-SphereIntersection.html for more details.
Distance between centers.
Radius of the first sphere.
Radius of the second sphere.
Fraction of volume of the overlap between the two spheres.
Compute volume overlap fraction between two spheres of radii r1
and r2
, with centers separated by a distance d
.
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