PostGIS  3.4.0dev-r@@SVN_REVISION@@

◆ distance3d_sqr_pt4d_pt4d()

static double distance3d_sqr_pt4d_pt4d ( const POINT4D *  p1,
const POINT4D *  p2 
)
inlinestatic

Definition at line 31 of file lwkmeans.c.

32 {
33  double hside = p2->x - p1->x;
34  double vside = p2->y - p1->y;
35  double zside = p2->z - p1->z;
36 
37  return hside * hside + vside * vside + zside * zside;
38 }
POINT4D::x
double x
Definition: liblwgeom.h:414
POINT4D::z
double z
Definition: liblwgeom.h:414
POINT4D::y
double y
Definition: liblwgeom.h:414

References POINT4D::x, POINT4D::y, and POINT4D::z.

Referenced by kmeans_init(), and update_r().

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