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include <gset.h>
include "rvpackage.h"
include "rvflags.h"
include "rvcomdef.h"
include "rvkeywords.h"
include "rvsample.h"
# RVUTIL.X -- Catch-all file that contains various and sundry utility routines
# used throughout the package.
# DEX - Raise 'cv' to a power of ten (10)
double procedure dex (cv)
real cv
double ln10, dx
begin
ln10 = 2.30258509299404d0
if ((cv*ln10) > 512) {
call rv_errmsg ("dex(): cv = %f")
call pargr (cv)
call flush (STDERR)
call error (0, "Floating overflow would have been tripped.")
}
dx = exp (cv * ln10)
return (dx)
end
# RV_AVGPIX - Find average pixel value in an array
real procedure rv_avgpix (data, npts)
real data[npts] #I data array
int npts #I No. points in array
real avg
double sum
int i
begin
sum = 0.0
do i = 1, npts
sum = sum + double (data[i])
avg = real (sum / double (npts))
return ( avg )
end
# RV_CUT - Mark a regions of the spectrum to be used in the correlation.
# Appends to the current regions string
procedure rv_cut (rv, x, sx, ex)
pointer rv #I RV struct pointer
real x #I Current cursor x position
real sx #O Start x position
real ex #O End x position
double dex()
real sregion, eregion, yp
begin
sregion = x # get endpoints
call rv_getpts (rv, eregion, yp, 1)
if (RV_PIXCORR(rv) == NO && RV_DCFLAG(rv) != -1) {
call rv_fixx (sregion, eregion, real(dex(RV_GLOB_W1(rv))),
real(dex(RV_GLOB_W2(rv))))
} else {
call rv_fixx (sregion, eregion, RV_GLOB_W1(rv), RV_GLOB_W2(rv))
}
sx = sregion
ex = eregion
end
# RV_FILL_BLANKS - Given an input string, substitue blanks with an underscore.
procedure rv_fill_blanks (in, out, maxch)
char in[maxch], out[maxch]
int maxch
int i
begin
i = 1
while (in[i] != EOS && i != maxch) {
if (in[i] == ' ')
out[i] = '_'
else
out[i] = in[i]
i = i + 1
}
out[i] = EOS
end
# RV_FIXX - Check for bounds on x's.
procedure rv_fixx (x1, x2, lx1, rx2)
real x1 #U 'left' x cursor
real x2 #U 'right' x cursor
real lx1 #I min allowed x point
real rx2 #I max allowed x point
real temp
begin
if (x2 < x1) { # Swap 'em
temp = min (x2, rx2)
x2 = max (x1, lx1)
x1 = temp
}
end
# RV_GETPTS - Read cursor to get another point.
procedure rv_getpts (rv, x, y, owcs)
pointer rv #I RV struct pointer
real x, y #I Cursor coords
int owcs #I Output wcs of coords
int wcs, key, stat
char command[SZ_FNAME]
int clgcur()
begin
call printf ("again: ")
stat = clgcur ("cursor", x, y, wcs, key, command, SZ_LINE)
if (owcs != wcs)
call gctran (RV_GP(rv), x, y, x, y, wcs, owcs)
call printf (" \n")
end
# RV_GETSHIFT - Find an extreme in the data array of type indicated and
# return the index in the array.
int procedure rv_getshift (data, npts, type)
real data[npts] #I data array
int npts #I No. points in array
int type #I type of extreme to find
int i, imax, imin
real max, min
begin
if (type == MAXIMUM) {
max = data[1]
imax = 1
do i = 2,npts {
if (data[i] > max) {
max = data[i]
imax = i
}
}
return (imax)
} else {
min = data[1]
imin = 1
do i = 2,npts {
if (data[i] < min) {
min = data[i]
imin = i
}
}
return (imin)
}
end
# RV_MAXPIX - Find maximum pixel value in an array
real procedure rv_maxpix (data, npts)
real data[npts] #I data array
int npts #I No. points in array
real max
int i
begin
max = data[1]
do i = 2,npts
if (data[i] > max)
max = data[i]
return (max)
end
# RV_MINPIX - Find minimum pixel value in an array
real procedure rv_minpix (data, npts)
real data[npts] #I data array
int npts #I No. points in array
real min
int i
begin
min = data[1]
do i = 2,npts
if (data[i] < min)
min = data[i]
return (min)
end
# RV_PAUSE - Print a string and await any key for an action.
procedure rv_pause (str)
char str[ARB]
real x, y
int wcs, key, stat
char command[SZ_FNAME]
int clgcur()
begin
call printf ("%s")
call pargstr (str)
call flush (STDOUT)
stat = clgcur ("cursor", x, y, wcs, key, command, SZ_FNAME)
if ('I' == key)
call error (0, "Quitting")
return
end
# RV_PRSHIFT - Use the cursor to print the difference in pixels.
procedure rv_prshift (rv, xpos)
pointer rv #I RV struct pointer
real xpos #I 1st x position
real xpos2, y, shift, pix_shift
double rv_shift2vel()
begin
call rv_getpts(rv, xpos2, y, 1)
shift = xpos2 - xpos
pix_shift = (log10(xpos2) - log10(xpos)) / RV_OWPC(rv)
call rv_mode_prompt (rv)
if (RV_DCFLAG(rv) != -1) {
call printf (" Difference = %.2f Km/sec (~%d pix) (~%.3f A)\n")
call pargd (rv_shift2vel(rv,pix_shift))
call pargi (int(pix_shift))
call pargr (shift)
} else {
call printf (" Difference = %.2f pixels.\n")
call pargr (pix_shift)
}
end
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