Returns the vectorial product of two vectors.

Location in HEALPix directory tree: src/f90/mod/pix_tools.f90

FORMAT

call vect_prod( v1, v2, v3 )

ARGUMENTS

name&dimensionality	kind	in/out	description

v1(3)	DP	IN	cartesian vector ${\bf v}_1$ .
v2(3)	DP	IN	cartesian vector ${\bf v}_2$ .
v3(3)	DP	OUT	cartesian vector ${\bf v}_3 = {\bf v}_1 \times {\bf v}_2$

EXAMPLE:

use healpix_types use pix_tools, only : vect_prod real(DP), dimension(3) :: vec real(DP) :: one = 1.0_dp call vect_prod((/2,0,0/)*one, (/0,1,0/)*one, vec) print*, vec

will return : 0.00E+000 0.00E+000 2.00

RELATED ROUTINES

This section lists the routines related to vect_prod

angdist: computes the angular distance between 2 vectors

Eric Hivon 2010-06-18

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