FUNCTION fHtmXyz

Returns htmid given x,y,z in cartesian coordinates in J2000

Returns the Hierarchical Triangular Mesh (HTM) ID of a given point, given x,y,z in cartesian (J2000) reference frame. The vector (x,y,z) will be normalized to unit vector if non-zero and set to (1,0,0) if zero. Returns the 21-deep htmid of this object.
Parameters:

@x float, unit vector for ra+dec
@y float, unit vector for ra+dec
@z float, unit vector for ra+dec
returns htmID bigint
select dbo.fHtmXyz(1,0,0)
gives 17042430230528
see also fHtmEq

Input and output parameters

name type length inout pnum

@x float 8 input 1

@y float 8 input 2

@z float 8 input 3

bigint 8 input 0

name	type	length	inout	pnum
@x	float	8	input	1
@y	float	8	input	2
@z	float	8	input	3
	bigint	8	input	0