load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
load "$NCARG_ROOT/lib/ncarg/nclscripts/wrf/WRFUserARW.ncl"

begin

; for use of high resolution map database, execute
; 'setenv NCARG_RANGS /network/rit/lab/atm419lab/zhou/rangs' (on snow)
; 'setenv NCARG_RANGS /atm419lab/zhou/rangs' (on ash, reed)
; before running the script

c="./cmap_shear.txt"
cmap=asciiread(c,(/72,3/),"float")
cmap=cmap/255

center=asciiread("../../FAILURE_START/failure_start_latlon.txt",(/79,2/),"float")
;print(center(:,1))
tinfo=asciiread("../../FAILURE_START/failure_start_time.txt",(/79,2/),"integer")
yyyymmddhh=tinfo(:,1)
;print(yyyymmddhh)
name=asciiread("../../FAILURE_START/failure_name_chron.txt",(/79/),"string")
;print(name)

dcase=dimsizes(yyyymmddhh)
shear_comp=new((/dcase,29,29/),"float")

do case=0,dcase-1,1

print("working on "+yyyymmddhh(case)+" -- "+name(case))

data=addfile("../../FAILURE_START/ei.oper.an.pl.regn128uv."+yyyymmddhh(case),"r")
;names=getfilevarnames(data)
;print(names)

U:=data->U_GDS4_ISBL
U!0="lev"
U!1="lat"
U!2="lon"

V:=data->V_GDS4_ISBL
V!0="lev"
V!1="lat"
V!2="lon"

;printVarSummary(U)
;print(num(ismissing(U)))
;print(U&lev)
;print(U&lat)

lat=U&lat
lon=U&lon
centlat_ind=ind_nearest_coord(center(case,0),lat,0)
centlon_ind=ind_nearest_coord(center(case,1),lon,0)
centlat=lat(centlat_ind)
centlon=lon(centlon_ind)

dsizes=dimsizes(U)
;print(dsizes)
dlat=dsizes(1)
dlon=dsizes(2)

du=U(14,:,:)-U(30,:,:)
dv=V(14,:,:)-V(30,:,:)
shear=sqrt(du^2+dv^2)

copy_VarMeta(U(0,:,:),du)
copy_VarMeta(U(0,:,:),dv)
copy_VarMeta(U(0,:,:),shear)
;printVarSummary(shear)

shear_comp(case,:,:)=shear(centlat_ind+14:centlat_ind-14,centlon_ind-14:centlon_ind+14)
;printVarSummary(shear_comp)

wks=gsn_open_wks("png","failure_start_case_"+case)
gsn_define_colormap(wks,cmap)

res=True

res@gsnAddCyclic=False
res@gsnFrame=False
res@gsnMaximize=False
res@gsnStringFont=21
res@gsnLeftString="850-200hPa shear (m/s)"
res@gsnLeftStringOrthogonalPosF=0.01
res@gsnLeftStringFontHeightF=0.015
res@gsnRightString=name(case)+" @ "+sprinti("%10.0i",yyyymmddhh(case))
;res@gsnRightString="+"+sprinti("%0.2i",counter)+"h"
;res@gsnRightString="+"+sprintf("%4.1f",counter*0.5)+"h"
res@gsnRightStringOrthogonalPosF=0.01
res@gsnRightStringFontHeightF=0.015
res@gsnScalarContour=True

res@vpXF=0.15
res@vpYF=0.95
res@vpHeightF=0.7
res@vpWidthF=0.7

res@vcRefMagnitudeF=20
res@vcRefLengthF=0.035
res@vcGlyphStyle="CurlyVector"
res@vcLineArrowThicknessF=3.0
res@vcRefAnnoOrthogonalPosF=-0.079
res@vcRefAnnoParallelPosF=1.0
res@vcMinDistanceF=0.03
res@vcMonoLineArrowColor=True
res@vcLineArrowColor=0
res@vcRefAnnoArrowUseVecColor=False
res@vcRefAnnoArrowLineColor=1

;res@stLineColor=0
;res@stArrowLengthF=0.004
;res@stMinArrowSpacingF=0.004
;res@stMinDistanceF=0.1
;res@stLineThicknessF=2.0
;res@stStepSizeF=0.01

res@cnFillOn=True
res@cnLevelSelectionMode="ExplicitLevels"
res@cnLevels=ispan(0,50,1)
res@cnFillOpacityF=1
res@cnLinesOn=False

res@lbBoxSeparatorLinesOn=False
res@lbLabelStride=10

res@pmLabelBarHeightF=0.1

res@mpDataResolution="FinestResolution"
res@mpDataBaseVersion="HighRes"
res@mpLimitMode="LatLon"
;res@mpCenterLatF=centlat
;res@mpCenterLonF=centlon
res@mpMinLatF=centlat-10
res@mpMaxLatF=centlat+10
res@mpMinLonF=centlon-10
res@mpMaxLonF=centlon+10
res@mpMonoFillColor=False
res@mpFillColors=(/-1,-1,-1/)
res@mpOutlineOn=True

res@tmXTOn                = False
res@tmYROn                = False

res@tmXBMode              = "Explicit"
res@tmXBValues            = ispan(100,180,10)
res@tmXBLabels            = (/"100~S~o~N~E","110~S~o~N~","120~S~o~N~E",\
                              "130~S~o~N~","140~S~o~N~E","150~S~o~N~",\
                              "160~S~o~N~E","170~S~o~N~","180~S~o~N~E"/)
res@tmXBMajorLengthF      = 0.01
res@tmXBMajorOutwardLengthF=0.0
res@tmXBMajorThicknessF   = 3.0
;res@tmXBMinorOn           = False
res@tmXBMinorPerMajor     = 4
res@tmXBMinorLengthF      = 0.004
res@tmXBMinorOutwardLengthF=0.0
res@tmXBMinorThicknessF   = 2.0
res@tmXBLabelFont         = 21
res@tmXBLabelFontHeightF  = 0.015
res@tmXBLabelDeltaF       = -0.6

res@tmYLMode              = "Explicit"
res@tmYLValues            = ispan(0,50,10)
res@tmYLLabels            = (/"0~S~o~N~","10~S~o~N~N","20~S~o~N~",\
                              "30~S~o~N~N","40~S~o~N~","50~S~o~N~N"/)
res@tmYLMajorLengthF      = 0.01
res@tmYLMajorOutwardLengthF=0.0
res@tmYLMajorThicknessF   = 3.0
;res@tmYLMinorOn           = False
res@tmYLMinorPerMajor     = 4
res@tmYLMinorLengthF      = 0.004
res@tmYLMinorOutwardLengthF=0.0
res@tmYLMinorThicknessF   = 2.0
res@tmYLLabelFont         = 21
res@tmYLLabelFontHeightF  = 0.015
res@tmYLLabelDeltaF       = -0.3

plot=gsn_csm_vector_scalar_map(wks,du,dv,shear,res)
;plot=gsn_csm_streamline_contour_map(wks,du,dv,shear,res)

frame(wks)

end do

rm=systemfunc("rm -rf shear_composite.nc")

fout=addfile("./shear_composite.nc","c")
fout->shear=shear_comp

end