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,(/103,3/),"float")
cmap=cmap/255

avg_shear=asciiread("avg_shear.txt",(/92,3/),"float")
avg_shear_u_all_cases=avg(avg_shear(:,0))
avg_shear_v_all_cases=avg(avg_shear(:,1))
avg_shear_mag_all_cases=avg(avg_shear(:,2))

data=addfile("./shear_composite.nc","r")
U=data->U
V=data->V

;printVarSummary(U)

U!0="case"
V!0="case"

;printVarSummary(U)

U&lat=fspan(-20,20,161)
U&lon=fspan(-20,20,161)
V&lat=fspan(-20,20,161)
V&lon=fspan(-20,20,161)
;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)

;printVarSummary(U)

dsizes=dimsizes(U)
;print(dsizes)
dcases=dsizes(0)
dlat=dsizes(1)
dlon=dsizes(2)

U_avg=dim_avg_n_Wrap(U,0)
V_avg=dim_avg_n_Wrap(V,0)
MAG_avg=sqrt(U_avg^2+V_avg^2)

copy_VarMeta(U_avg,MAG_avg)
;printVarSummary(MAG_avg)

wks=gsn_open_wks("png","composite")
gsn_define_colormap(wks,cmap)

res=True

res@gsnAddCyclic=False
res@gsnFrame=False
res@gsnDraw=False
res@gsnMaximize=False
res@gsnStringFont=21
res@gsnLeftString="200-850hPa shear (kt)"
res@gsnLeftStringOrthogonalPosF=0.01
res@gsnLeftStringFontHeightF=0.015
res@gsnRightString="composite of 92 cases"
;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@trYMinF=-20
res@trYMaxF=20
res@trXMinF=-20
res@trXMaxF=20

;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(-15,15,5)
res@tmXBLabels            = res@tmXBValues
;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(-15,15,5)
res@tmYLLabels            = res@tmYLValues
;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


res@cnFillOn=True
res@cnLevelSelectionMode="ExplicitLevels"
res@cnLevels=fspan(0,100,101)
res@cnFillOpacityF=1
res@cnLinesOn=False

res@lbBoxSeparatorLinesOn=False
res@lbLabelStride=10
res@lbLabelFontHeightF=0.015

res@pmLabelBarHeightF=0.1

MAG_avg_kts=MAG_avg/0.51444

copy_VarMeta(MAG_avg,MAG_avg_kts)

plot1=gsn_csm_contour(wks,MAG_avg_kts,res)

U_avg_kts=U_avg/0.51444
V_avg_kts=V_avg/0.51444

copy_VarMeta(U_avg,U_avg_kts)
copy_VarMeta(V_avg,V_avg_kts)

res@vcRefMagnitudeF=65
res@vcRefLengthF=0.025
;res@vcGlyphStyle="CurlyVector"
res@vcGlyphStyle="WindBarb"
;res@vcLineArrowThicknessF=3.0
res@vcWindBarbLineThicknessF=2.0
res@vcWindBarbTickLengthF=0.4
res@vcRefAnnoOrthogonalPosF=-0.079
res@vcRefAnnoParallelPosF=1.0
;res@vcMinDistanceF=0.03
res@vcMonoLineArrowColor=True
;res@vcLineArrowColor=1
res@vcWindBarbColor="white"
res@vcRefAnnoArrowUseVecColor=False
res@vcRefAnnoArrowLineColor="black"

res@vcWindBarbTickSpacingF=0.125
res@vcRefAnnoOn=False
res@vcMonoWindBarbColor=True
res@vcGlyphOpacityF=1.0

plot2=gsn_csm_vector(wks,U_avg_kts(::10,::10),V_avg_kts(::10,::10),res)

u_azi=U_avg
v_azi=V_avg

u_azi=0
v_azi=0

u_azi(81,81)=avg_shear_u_all_cases/0.51444
v_azi(81,81)=avg_shear_v_all_cases/0.51444
print(sqrt(u_azi(81,81)^2+v_azi(81,81)^2))

u_azi@_FillValue=0
v_azi@_FillValue=0

res@vcRefLengthF=0.090
res@vcWindBarbLineThicknessF=15.0
res@vcWindBarbColor="cyan"
res@vcWindBarbTickSpacingF=0.2

res@vcRefAnnoOn=False
res@vcScalarMissingValColor=-1
res@vcGlyphOpacityF=1.0

plot3=gsn_csm_vector(wks,u_azi,v_azi,res)

resc=True
resc@gsLineColor="cyan" ;RGB for "cyan" is (0 255 255)
resc@gsLineThicknessF=10
resc@gsLineDashPattern=2
resc@gsLineDashSegLenF=0.3
circle_ll(wks,plot1,0,0,5,resc)

draw(plot1)
draw(plot3)
draw(plot2)

frame(wks)

end