axback.pro

   cgDisplay, WID=1,xs=1100, ys=1100,xpos=1200, ypos=800
nbeg=0
nend=nlast
nfile=0
for nfile=nbeg, nend do begin
pload,nfile
time=t[nfile]
den=rho[*,*]
v1 =vx1[*,*]
v2 =vx2[*,*]
v3 =vx3[*,*]
b1 =bx1[*,*]
b2 =bx2[*,*]
b3 =bx3[*,*]
pr =prs[*,*]

x2d=rebin(reform(x1,nx1,1),nx1,nx2)
y2d=rebin(reform(x2,1,nx2),nx1,nx2)
   r  = x2d;
   r2 = r*r;
   r3 = r2*r;
     
     betap=1.25e-2
     kappa=1.
     Bmag = sqrt(2.0*kappa/betap);

bxback= 2.0*Bmag*cos(y2d)/r3;
byback=   Bmag*sin(y2d)/r3;

bx1=bx1+bxback
bx2=bx2+byback


xx=x1
yy=!PI/2-x2
polar, den, xx,yy
xx=x1
yy=!PI/2-x2
polar, v1, xx,yy
xx=x1
yy=!PI/2-x2
polar, v2, xx,yy
xx=x1
yy=!PI/2-x2
polar, v3, xx,yy
xx=x1
yy=!PI/2-x2
polar, b1, xx,yy
xx=x1
yy=!PI/2-x2
polar, b2, xx,yy
xx=x1
yy=!PI/2-x2
polar, b3, xx,yy
xx=x1
yy=!PI/2-x2
polar, pr, xx,yy

bx2by2=b1^2+b2^2

print, 'max, min, v1', max(v1), min(v1)
print, 'max, min, v2', max(v2), min(v2)
print, 'max, min, v3', max(v3), min(v3)
print, 'max, min, b1', max(b1), min(b1)
print, 'max, min, b2', max(b2), min(b2)
print, 'max, min, b3', max(b3), min(b3)

dataptr=ptrarr(12)

titlestr=strarr(12,30)
dataptr[0]=ptr_new(v1)
dataptr[1]=ptr_new(v2)
dataptr[2]=ptr_new(v3)
dataptr[3]=ptr_new(b1)
dataptr[4]=ptr_new(b2)
dataptr[5]=ptr_new(b3)
dataptr[6]=ptr_new(pr)
dataptr[7]=ptr_new(alog(den))
dataptr[8]=ptr_new(alog(bx2by2))

titlestr[0,*]='v1'
titlestr[1,*]='v2'
titlestr[2,*]='v3'
titlestr[3,*]='b1'
titlestr[4,*]='b2'
titlestr[5,*]='b3'
titlestr[6,*]='rho'
titlestr[7,*]='rho'
titlestr[8,*]='bx^2+by^2'




   cgLoadCT, 22, /Brewer, /Reverse
   pos = cglayout([1,1] , OXMargin=[5,5], OYMargin=[5,7], XGap=3, YGap=7)
   ;FOR j=0,8 DO BEGIN
   j=0
     p = pos[*,j]
     j=7
	r=cgscalevector( *dataptr(j), 1,254)
	imin=min(*dataptr[j])
	imax=max(*dataptr[j])
     cgImage, r, Position=p
  cgcontour,xx#yy, xx,yy , /nodata, /noerase, xtitle='x', pos=p, title=titlestr(j), Charsize=cgDefCharsize()*0.5
     cgColorBar, position=[p[0], p[1]-0.03, p[2], p[1]-0.02],range=[imin-1e-6,imax+1e-6], Charsize=cgDefCharsize()*0.5
   ;ENDFOR
   cgText, 0.5, 0.96, /Normal,  'SDI time='+string(time/2./!DPI, format='(F6.2)'), Alignment=0.5, Charsize=cgDefCharsize()*1.25


bpres=(b1^2+b2^2+b3^2)/2.d
bet=bpres/pr
stag=bpres/den*(v1^2+v2^2+v3^2)


cgcontour,bet, xx,yy,pos=p, levels=1, /overplot

q=13
help, b1
cv1=congrid(b1, q,q)
cv2=congrid(b2, q,q)
cx=congrid(xx, q)
cy=congrid(yy, q)
;velovect, cv1,cv2, cx,cy, /noerase,/overplot, position=pos , color=cgcolor('white'), c_thick=4

xf=2.0
;for i=1.26, xf,0.1 do begin

;field_line, b1, b2, xx,yy,  i,0.05, rr,zz
;oplot, rr,zz,color=255
;field_line, b1(0), b2(0), x1,x2,  10,i, rr,zz
;oplot, rr,zz,color=255
;endfor

 for qq=x1[1],5,0.25 do begin
seed=[qq,!PI*9.9/20.]
myxq=x1
myyq=x2
br=bx1
bth=bx2/sqrt(xpos^2+ypos^2)
field_line, br,bth,0,myxq,myyq,0,seed=seed ,pl, method="BS23", tol=1.e-6
oplot, pl[0,*]*sin(pl[1,*]), pl[0,*]*cos(pl[1,*]), color=cgcolor('black')
pl=0
seed=0
endfor

endfor

end