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44 lines
1.3 KiB
C++
44 lines
1.3 KiB
C++
// This code is in the public domain -- Ignacio Castaño <castano@gmail.com>
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#pragma once
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#ifndef NV_MATH_SPHERE_H
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#define NV_MATH_SPHERE_H
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#include "Vector.h"
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namespace nv
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{
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class Sphere
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{
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public:
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Sphere() {}
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Sphere(Vector3::Arg center, float radius) : center(center), radius(radius) {}
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Sphere(Vector3::Arg center) : center(center), radius(0.0f) {}
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Sphere(Vector3::Arg p0, Vector3::Arg p1);
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Sphere(Vector3::Arg p0, Vector3::Arg p1, Vector3::Arg p2);
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Sphere(Vector3::Arg p0, Vector3::Arg p1, Vector3::Arg p2, Vector3::Arg p3);
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Vector3 center;
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float radius;
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};
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// Returns negative values if point is inside.
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float distanceSquared(const Sphere & sphere, const Vector3 &point);
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// Welz's algorithm. Fairly slow, recursive implementation uses large stack.
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Sphere miniBall(const Vector3 * pointArray, uint pointCount);
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Sphere approximateSphere_Ritter(const Vector3 * pointArray, uint pointCount);
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Sphere approximateSphere_AABB(const Vector3 * pointArray, uint pointCount);
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Sphere approximateSphere_EPOS6(const Vector3 * pointArray, uint pointCount);
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Sphere approximateSphere_EPOS14(const Vector3 * pointArray, uint pointCount);
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} // nv namespace
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#endif // NV_MATH_SPHERE_H
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