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utility
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cmd_head.c,
count_tokens.c,
cp_file.c,
errmsg.c,
file_opened.c,
find_line.c,
find_string.c,
fn_base.c,
fn_dir.c,
fn_ext.c,
fn_root.c,
gchoice.c,
gdata_line.c,
gdouble.c,
gfield.c,
gint.c,
gntoken.c,
graphics_ok.c,
gstring.c,
lock.c,
lower.c,
mat_multiply.c,
mat_transform.c,
mat_transpose.c,
mv_file.c,
new_extension.c,
nolead.c,
notrail.c,
ordinal.c,
pfield.c,
squish_blanks.c,
test.c,
unlock.c,
upper.c,
utility.h,
utility.make,
valchars.c,
vec_angle.c,
vec_crossprod.c,
vec_diff.c,
vec_dotprod.c,
vec_length.c,
vec_norm.c,
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#include "utility.h"
double vec_norm(vector1,vector2)
/*============================================================================*/
/* PURPOSE: NORMALIZE A VECTOR.
/* INPUTS:
/* VECTOR1 (X,Y,Z) TRIPLET.
/* OUTPUTS:
/* VECTOR2 (X,Y,Z) TRIPLET EQUAL TO NORMALIZED VECTOR.
/* FUNCTION VALUE VECTOR LENGTH USED IN NORMALIZATION (FAILURE IF ZERO).
/* WRITTEN: M.V.GRIESHABER
/* LAST MODIFICATION: 11 JUNE 1991 MVG
*/
double vector1[3];
double vector2[3];
{
double length;
int i;
/* DETERMINE THE LENGTH OF THE VECTOR. IF ZERO, CAN'T NORMALIZE.*/
if ((length=vec_length(vector1)) > 0.0)
{
for(i=0 ; i<3 ; i++)
{
vector2[i]=vector1[i]/length;
}
}
return(length);
}
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