/usr/share/ncarg/nclex/streamlineplot/st02n.ncl is in libncarg-data 6.3.0-6build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; ;
; Copyright (C) 1993 ;
; University Corporation for Atmospheric Research ;
; All Rights Reserved ;
; ;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;
; File: st02n.ncl
;
; Author: David Brown
; National Center for Atmospheric Research
; PO 3000, Boulder, Colorado
;
;
; Date: Wed Apr 3 17:00:55 MST 1996
;
; Description: Given a simple mathematically generated data set,
; demonstrates line-drawn streamline arrows and the use
; of some basic StreamlinePlot resources
;
begin
N=30
M=25
PI=3.14159
;
; Generate vector data arrays
;
V = 10.0 * cos(onedtond((2.0 * PI / M) * ispan(0,M-1,1),(/N,M/)))
U = 10.0 * cos(onedtond((2.0 * PI / N) * ispan(0,N-1,1),(/M,N/)))
;
; We will need to transpose U so dimension names will be needed
;
U!0 = "x"
U!1 = "y"
;
; Create an application context. Set the app dir to the current directory
; so the application looks for a resource file in the working directory.
;
appid = create "st02" appClass defaultapp
"appUsrDir" : "./"
"appDefaultParent" : True
end create
;
; Default is to display output to an X workstation
;
wks_type = "x11"
if (str_lower(wks_type).eq."ncgm")
;
; Create an NCGM workstation.
;
wid = create "st02Work" ncgmWorkstationClass defaultapp
"wkMetaName" : "./st02n.ncgm"
end create
end if
if (str_lower(wks_type).eq."x11") then
;
; Create an X workstation.
;
wid = create "st02Work" windowWorkstationClass defaultapp
"wkPause" : True
end create
end if
if (str_lower(wks_type).eq."oldps") then
;
; Create an older-style PostScript workstation.
;
wid = create "st02Work" psWorkstationClass defaultapp
"wkPSFileName" : "./st02n.ps"
end create
end if
if (str_lower(wks_type).eq."oldpdf") then
;
; Create an older-style PDF workstation.
;
wid = create "st02Work" pdfWorkstationClass defaultapp
"wkPDFFileName" : "./st02n.pdf"
end create
end if
if (str_lower(wks_type).eq."pdf".or.str_lower(wks_type).eq."ps") then
;
; Create a cairo PS/PDF Workstation object.
;
wid = create "st02Work" documentWorkstationClass defaultapp
"wkFileName" : "./st02n"
"wkFormat" : wks_type
end create
end if
if (str_lower(wks_type).eq."png") then
;
; Create a cairo PNG Workstation object.
;
wid = create "st02Work" imageWorkstationClass defaultapp
"wkFileName" : "./st02n"
"wkFormat" : wks_type
end create
end if
;
; Create a VectorField data object using the data set defined above.
; By default the array bounds will define the data boundaries (zero-based,
; as in C language conventions)
;
vfid = create "vfield" vectorFieldClass appid
"vfUDataArray" : U( y | :, x | :)
"vfVDataArray" : V
end create
;
; Create a StreamlinePlot object, supplying the VectorField object as data
;
stid = create "streamlineplot" streamlinePlotClass wid
"tiMainString" : "Modifying StreamlinePlot resources"
"stVectorFieldData" : vfid
end create
draw(stid)
frame(wid)
;
; Get the values of several resources that are set dynamically based
; on the assumed NDC size of a grid cell. Each of this will be separately
; modified in the course of this example to illustrate their effect.
;
getvalues stid
"stStepSizeF" : stepsize
"stArrowLengthF" : arrowlength
"stMinLineSpacingF" : spacing
end getvalues
;
; Increase the step size
;
setvalues stid
"tiMainString" : "Larger Step Size"
"stStepSizeF" : stepsize * 4.0
end setvalues
draw(stid)
frame(wid)
;
; Decrease the step size
;
setvalues stid
"tiMainString" : "Smaller Step Size"
"stStepSizeF" : stepsize * 0.25
end setvalues
draw(stid)
frame(wid)
;
; Increase the minimum line spacing
;
setvalues stid
"tiMainString" : "Larger Minimum Line Spacing"
"stMinLineSpacingF" : spacing * 4.0
"stStepSizeF" : stepsize
end setvalues
draw(stid)
frame(wid)
;
; Decrease the minimum line spacing
;
setvalues stid
"tiMainString" : "Smaller Minimum Line Spacing"
"stMinLineSpacingF" : spacing * 0.25
end setvalues
draw(stid)
frame(wid)
;
; Increase the line starting grid stride
;
setvalues stid
"tiMainString" : "Larger Line Starting Grid Stride"
"stMinLineSpacingF" : spacing
"stLineStartStride" : 3
end setvalues
draw(stid)
frame(wid)
;
; Decrease the line starting grid stride
;
setvalues stid
"tiMainString" : "Smaller Line Starting Grid Stride"
"stLineStartStride" : 1
end setvalues
draw(stid)
frame(wid)
;
; Increase the arrow size
;
setvalues stid
"tiMainString" : "Larger Arrows"
"stLineStartStride" : 2
"stArrowLengthF" : arrowlength * 2.0
end setvalues
draw(stid)
frame(wid)
;
; Clean up
;
delete(appid)
end
|