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linguist/samples/NCL/traj_3.ncl
2015-07-09 07:17:01 -07:00

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;*************************************************
; traj_3.ncl
;*************************************************
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
external TRAJ "./particle.so"
;*************************************************
begin
path = "./data.asc"
data = asciiread(path,(/500,6/),"float")
;*************************************************
; some parameters
;*************************************************
np = 1
nq = 500
ncor= 8
xrot = new((/np,nq/),float)
yrot = new((/np,nq/),float)
xaxis = new(ncor,float)
yaxis = new(ncor,float)
;**************************************************
; convert data into rotated format
;**************************************************
TRAJ::particle(path,xrot,yrot,nq,np,xaxis,yaxis,ncor)
;**************************************************
; create plot
;**************************************************
wks = gsn_open_wks("ps","traj") ; Open an ps file
xyres = True
xyres@gsnFrame = False ; don't advance the frame
xyres@gsnDraw = False ; don't draw indivdual plots
xyres@tmXTBorderOn = False ; don't draw top axis
xyres@tmXBBorderOn = False ; don't draw bottom axis
xyres@tmYRBorderOn = False ; don't draw right axis
xyres@tmYLBorderOn = False ; don't draw left axis
xyres@tmXTOn = False ; don't draw top-axis tick marks
xyres@tmXBOn = False ; don't draw bottom-axis tick marks
xyres@tmYROn = False ; don't draw right-axis tick marks
xyres@tmYLOn = False ; don't draw left-axis tick marks
xyres@xyLineColors = (/"red"/) ; set the line color to red
xyres@xyLineThicknessF = 4.0 ; 4 times the line thickness
xyres@trXMaxF = 15000 ; choose range of axis even though
xyres@trXMinF = -10000 ; we don't see them
xyres@trYMaxF = 1000
xyres@trYMinF = -1000
plot = gsn_xy(wks,xrot,yrot,xyres) ; Draw trajectory
;**********************************************
; create arrays needed for the bounding box
;**********************************************
a1 = new(5,float)
b1 = new(5,float)
a2 = new(5,float)
b2 = new(5,float)
a3 = new(2,float)
b3 = new(2,float)
a4 = new(2,float)
b4 = new(2,float)
a5 = new(2,float)
b5 = new(2,float)
a6 = new(2,float)
b6 = new(2,float)
a0 = new(2,float)
b0 = new(2,float)
;**********************************************
; determine values of each bounding line from information
; returned from particle.f
;**********************************************
a1(0:3) = xaxis(:3)
b1(0:3) = yaxis(:3)
a1(4) = xaxis(0)
b1(4) = yaxis(0)
a2(0:3) = xaxis(4:)
b2(0:3) = yaxis(4:)
a2(4) = xaxis(4)
b2(4) = yaxis(4)
a3 = xaxis(0:4:4)
b3 = yaxis(0:4:4)
a4 = xaxis(1:5:4)
b4 = yaxis(1:5:4)
a5 = xaxis(2:6:4)
b5 = yaxis(2:6:4)
a6 = xaxis(3:7:4)
b6 = yaxis(3:7:4)
a0(0) = xaxis(3)
b0(0) = yaxis(3)
a0(1) = xrot(0,0)
b0(1) = yrot(0,0)
;***************************************************************
; create bounding box by drawing multiple xy plots on top of
; each other. each with their individual axis turned off.
;***************************************************************
xyres@xyLineColors = (/"black"/) ; line color
xyres@xyLineThicknessF = 1.0 ; regular line thickness
bottom = gsn_xy(wks,a1,b1,xyres) ; Draw the bottom bounding box.
top = gsn_xy(wks,a2,b2,xyres) ; Draw the top bounding box.
side1 = gsn_xy(wks,a3,b3,xyres) ; Draw a side line.
side2 = gsn_xy(wks,a4,b4,xyres) ; Draw a side line.
side3 = gsn_xy(wks,a5,b5,xyres) ; Draw a side line.
side4 = gsn_xy(wks,a6,b6,xyres) ; Draw a side line.
;***************************************************************
; now draw a large brown line to represent the chimney
;***************************************************************
xyres@xyLineColors = (/"brown"/) ; chimney color
xyres@xyLineThicknessF = 9.0 ; thick line
xyres@tiMainString = "Pollutant Trajectory in a 3D Volume"
chimney = gsn_xy(wks,a0,b0,xyres) ; Draw the chimney.
draw(wks)
frame(wks)
end