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
|
require 'narray'
require 'pgplot'
include Pgplot
include NMath
def main
exit unless pgbeg('?',1,1)
print " Routine PGCONT\n"
pgex31
print " Routine PGCONS\n"
pgex32
print " Routine PGCONB\n"
pgex33
print " Routine PGCONT with PGCONL labels\n"
pgex36
#print " Routine PGCONX with arrow labels\n"
#pgex37
#print " Routine PGCONX\n"
#pgex34
print " Routine PGCONF\n"
pgexx1
pgend
end
# ====== Utility ======
class PgLinestyle
attr_accessor :width
attr_accessor :color
attr_accessor :style
def initialize(opt=nil)
@width = 1
@color = 1
@style = 1
if opt.is_a?(Hash)
@width = opt[:width] || @width
@width = opt['width'] || @width
@color = opt[:color] || @color
@color = opt['color'] || @color
@style = opt[:style] || @style
@style = opt['style'] || @style
end
end
def set
pgslw @width
pgsci @color
pgsls @style
end
end # class PgLinestyle
NC=21
Pgline_default = PgLinestyle.new
$sty = (1..NC).collect{|i|
if i<10
x = PgLinestyle.new(:width =>1, :color =>2, :style =>2)
else
x = PgLinestyle.new(:width =>1, :color =>3, :style =>1)
end
if i%5==0
x.width = 5
end
x
}
i = NArray.sfloat(40,1).indgen!(1)
j = NArray.sfloat(1,40).indgen!(1)
$f = cos( 0.3*sqrt(i*2)-0.4*j/3 ) * cos( 0.4*i/3 ) + (i-j)/40.0
$lv = NArray.sfloat(NC).indgen!*($f.max-$f.min)/NC+$f.min
#NArray.span($f.minmax,NC)
# ====== Exsample routine ======
def pgex31
pgpage
pgsvp(0.05,0.95,0.05,0.95)
pgswin(1.0,40.0,1.0,40.0)
pgbox('bcts',0.0,0,'bcts',0.0,0)
pgmtxt('t',1.0,0.0,0.0,'Contouring using PGCONT')
pgbbuf
for i in 0...NC
$sty[i].set
pgcont $f, $lv[i]
end
Pgline_default.set
pgebuf
end
def pgex32
pgpage
pgsvp(0.05,0.95,0.05,0.95)
pgswin(1.0,40.0,1.0,40.0)
pgbox('bcts',0.0,0,'bcts',0.0,0)
pgmtxt('t',1.0,0.0,0.0,'Contouring using PGCONS')
pgbbuf
for i in 0...NC
$sty[i].set
pgcons $f, $lv[i]
end
Pgline_default.set
pgebuf
end
def pgex33
pgpage
pgsvp(0.05,0.95,0.05,0.95)
pgswin(1.0,40.0,1.0,40.0)
pgbox('bcts',0.0,0,'bcts',0.0,0)
pgmtxt('t',1.0,0.0,0.0,'Contouring using PGCONB')
pgbbuf
blank = -65536.0
f = $f.dup
i = NArray.sfloat(40,1).indgen!(1)
j = NArray.sfloat(1,40).indgen!(1)
r = sqrt((i-20.5)**2 + (j-20.5)**2)
idx = ((r>20).or(r<3.0)).where
f[idx] = blank
pgsci 1
pgpt( (i+NArray.int(1,40))[idx], (j+NArray.int(40,1))[idx], 1 )
for i in 0...NC
$sty[i].set
pgconb f, $lv[i], blank
end
Pgline_default.set
pgebuf
end
def pgex36
pgpage
pgsvp(0.05,0.95,0.05,0.95)
pgswin(1.0,40.0,1.0,40.0)
pgbox('bcts',0.0,0,'bcts',0.0,0)
pgmtxt('t',1.0,0.0,0.0,'Contouring using PGCONT and PGCONL labels')
pgbbuf
for i in 0...NC
$sty[i].set
pgcons $f, $lv[i]
end
pgslw 1
pgsls 1
1.step(20,2) {|i|
pgsci $sty[i].color
pgconl $f,$lv[i],"%2i"%(i+1),16,8
}
Pgline_default.set
pgebuf
end
def pgexx1
nx=ny=51
c = [3.0, 3.2, 3.5, 3.6, 3.766413, 4.0 ,5.0, 10.0, 100.0]
xmin =-2.0
xmax = 2.0
ymin =-2.0
ymax = 2.0
mu = 0.3
dx = (xmax-xmin)/(nx-1)
dy = (ymax-ymin)/(ny-1)
tr = [xmin-dx, dx, 0.0, ymin-dy, 0.0, dy]
x = tr[0] + NArray.sfloat(nx,1).indgen!(1)*tr[1]
y = tr[3] + NArray.sfloat(1,ny).indgen!(1)*tr[5]
z = (1.0-mu)*(2.0/sqrt((x-mu)**2+y**2)+(x-mu)**2+y**2) +
mu*(2.0/sqrt((x+1.0-mu)**2+y**2)+(x+1.0-mu)**2+y**2)
pgpage
pgvstd
pgwnad(xmin, xmax, ymin, ymax)
pgsfs(1)
for i in 0..c.size-2
r = 0.5+0.5*(i-1)/(c.size-1)
pgscr(i+10, r, r, r)
pgsci(i+10)
pgconf(z,c[i]..c[i+1],tr)
end
pgsci(3)
pgcont(z,c,tr)
pgsci(1)
pgsch(0.6)
pgbox('bctsin',1.0,10,'bctsinv',1.0,10)
pgsch(1.0)
pgmtxt('t',1.0,0.0,0.0,'Contour filling using PGCONF')
end
main
|
