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#ifndef SPHERE_H #define SPHERE_H typedef struct Sphere Sphere; extern GeomClass *SphereClass; void SphereMinMax(Sphere *sphere, HPoint3 *min, HPoint3 *max); void SphereCenter(Sphere *sphere, HPoint3 *center); float SphereRadius(Sphere *sphere); void SphereSwitchSpace(Sphere *sphere, int space); /* Makes sphere encompassing both other spheres - new sphere if dest == NULL, * just puts results in dest otherwise */ Sphere *SphereUnion3(Sphere *a, Sphere *b, Sphere *dest); /* points is actually a six-element array containing the points with * the minimum and maximum x, y, and z coordinates. */ void SphereEncompassBounds(Sphere *sphere, HPoint3 *points); /* Returns zero if didn't change sphere, non-zero if did */ int SphereAddHPt3(Sphere *sphere, HPoint3 *point, Transform T); int SphereAddHPt3N(Sphere *sphere, HPoint3 *point, int n, Transform T); /* Modifies sphere to surround all points */ void SphereEncompassHPt3N(Sphere *sphere, HPoint3 *point, int n, Transform T); /* Finds points with the maximum dimensional span - spanPts is an array * of 6 elements (2 points per axis) */ void MaxDimensionalSpan(HPoint3 *spanPts, HPoint3 *point); void MaxDimensionalSpanN(HPoint3 *spanPts, HPoint3 *points, int n); #endif
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.