dustem_read_gcosth.pro
2.71 KB
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FUNCTION dustem_read_gcosth,file,silent=silent $
,gcosth_values=gcosth_values
;+
; NAME:
; dustem_read_gcosth
;
; PURPOSE:
; reads information relating to the grain G=cos(theta) scattering factors
; from the corresponding .DAT file
;
; CATEGORY:
; DustEMWrap, Distributed, LowLevel, Initialization
;
; CALLING SEQUENCE:
; st=dustem_read_gcosth(file)
;
; INPUTS:
; file : input file to be read
;
; OPTIONAL INPUT PARAMETERS:
;
; OUTPUTS:
; st : dustem data structure
;
; OPTIONAL OUTPUT PARAMETERS:
; gcosth_values : values of gcosth read from file [Nsize x Nwav]
;
; ACCEPTED KEY-WORDS:
; help : writes this help
;
; COMMON BLOCKS:
; None
;
; SIDE EFFECTS:
;
; RESTRICTIONS:
; The DustEM fortran code must be installed
; The DustEMWrap IDL code must be installed
;
; PROCEDURES AND SUBROUTINES USED:
;
; EXAMPLES:
;
; MODIFICATION HISTORY:
; Evolution details on the DustEMWrap gitlab.
; See http://dustemwrap.irap.omp.eu/ for FAQ and help.
;-
IF keyword_set(help) THEN BEGIN
doc_library,'dustem_read_gcosth'
full_st=0.
goto,the_end
ENDIF
st=''
Nmax=10000L ; we assume that there are less than this many lines in the file
sts=strarr(Nmax)
openr,unit,file,/get_lun
;==read comments
str='' & first_char='#'
WHILE first_char EQ '#' DO BEGIN
readf,unit,str
first_char=strmid(str,0,1)
ENDWHILE
;read number of sizes
Nsizes=fix(str)
;Get sizes
readf,unit,str
sizes=float(str_sep(strcompress(strtrim(str,2)),' '))
Ncol=Nsizes
; test read the next line to see if it contains densities
;readf,unit,str
;first_char=strmid(str,0,1)
;IF first_char ne '#' THEN BEGIN
; sizes=float(str_sep(strcompress(strtrim(str,2)),' '))
;ENDIF ELSE BEGIN
; sizes=fltarr(Nsizes)+la_undef()
;ENDELSE
;==read comments
str='' & first_char='#'
WHILE first_char EQ '#' DO BEGIN
readf,unit,str
first_char=strmid(str,0,1)
ENDWHILE
;== read Gcosth
sts[0]=str
nlines=1L
first_char=' '
WHILE not eof(unit) and first_char NE '#' DO BEGIN
readf,unit,st
sts[nlines]=st
nlines=nlines+1
first_char=strmid(st,0,1)
ENDWHILE
gcosth_str=sts[0:nlines-1]
close,unit
free_lun,unit
Nlines=n_elements(gcosth_str)
gcosth_values=fltarr(Nlines,Ncol)
FOR i=0L,Nlines-1 DO gcosth_values[i,*]=str_sep(strcompress(strtrim(gcosth_str[i],2)),' ')
;== Make output structure
cmd='one_st={'
FOR i=0L,Ncol-1 DO BEGIN
cmd=cmd+'v'+strtrim(i+1,2)+':'+'0.'
IF i NE Ncol-1 THEN BEGIN
cmd=cmd+','
ENDIF ELSE BEGIN
cmd=cmd+'}'
ENDELSE
ENDFOR
toto=execute(cmd)
gcosth_st=replicate(one_st,Nlines)
;=== fill in the gcosth structure
FOR j=0L,Ncol-1 DO BEGIN
gcosth_st.(j)=reform(gcosth_values(*,j))
ENDFOR
full_st={file:file,Nsizes:Nsizes,sizes:sizes,Gcosth:gcosth_st}
the_end:
return,full_st
END