FUNCTION dustem_plugin_modify_spinning_sed, key=key, val=val, scope=scope, help=help

;+
; NAME:
;    dustem_create_stext
; PURPOSE:
;    MODIFIES THE SPINNING DUST SED BY INTRODUCING A POLARIZATION FRACTION p AND A POLARIZATION ANGLE psi
; CATEGORY:
;    DUSTEM Wrapper
; CALLING SEQUENCE:
;    dustem_plugin_modify_spinning_sed(st,key=key,val=val)
; INPUTS:
;    st (st = dustem_run(p_dim))
; OPTIONAL INPUT PARAMETERS:
;    key  = input parameter number
;    val  = input parameter value
; OUTPUTS:
;    out = array containing the extinction stokes parameters
; OPTIONAL OUTPUT PARAMETERS:
;    None
; ACCEPTED KEY-WORDS:
;    help                  = if set, print this help
; COMMON BLOCKS:
;    None
; SIDE EFFECTS:
;    None
; RESTRICTIONS:
;    The dustem fortran code must be installed
;    The dustem idl wrapper must be installed
; PROCEDURE:
;    This is a dustem plugin
;-

IF keyword_set(help) THEN BEGIN
  doc_library,'dustem_plugin_modify_spinning_sed'
  goto,the_end
ENDIF


scope='REPLACE_POLSED+REPLACE_QSED+REPLACE_USED'

IF  ptr_valid((*!dustem_fit).CURRENT_PARAM_VALUES) THEN BEGIN
    p_dii=(*(*!dustem_fit).CURRENT_PARAM_VALUES)    
    st=dustem_run(p_dii)
    
ENDIF ELSE BEGIN
          p_dii=(*(*!dustem_fit).PARAM_INIT_VALUES)  
          st=dustem_run(p_di)

      ENDELSE 


psi=0.
smallp=0. ;supposing the spinning dust is 
IF keyword_set(key) THEN BEGIN 
  ind1=where(key EQ 1,count1)
  ind2=where(key EQ 2,count2)
  IF count1 NE 0 THEN smallp=val[ind1[0]] ; setting psi from pd   
  IF count2 NE 0 THEN psi=val[ind2[0]] ; setting psi from pd
ENDIF


fact = 1.e4*1.E20/(4.*!pi)/(3.e8/1.e-6/(st.polsed).wav)*1.e20/1.e7


SpinningI=(st.sed.em_grain_1)+(st.sed.em_grain_2)*fact
SpinningP=SpinningI*smallp

Nwaves=(size(SpinningI))[1]

polar_ippsi2iqu,SpinningI,SpinningQ,SpinningU,replicate(smallp,Nwaves),replicate(psi,Nwaves) 

out=fltarr(Nwaves,4)

out[*,0]=SpinningI
out[*,1]=SpinningQ
out[*,2]=SpinningU
out[*,3]=SpinningP

return, out

the_end:


end