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
|
C***********************************************************************
C Module: contest.f
C
C Copyright (C) 1996 Harold Youngren, Mark Drela
C
C This program is free software; you can redistribute it and/or modify
C it under the terms of the GNU General Public License as published by
C the Free Software Foundation; either version 2 of the License, or
C (at your option) any later version.
C
C This program is distributed in the hope that it will be useful,
C but WITHOUT ANY WARRANTY; without even the implied warranty of
C MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
C GNU General Public License for more details.
C
C You should have received a copy of the GNU General Public License
C along with this program; if not, write to the Free Software
C Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
C
C Report problems to: guppy@maine.com
C or drela@mit.edu
C***********************************************************************
program contest
C
C--- Test of Xplot11 quadrilateral and triangle contour primitives
C
CHARACTER CHR*2, HUES*10
DIMENSION X(4), Y(4), Z(4)
DIMENSION XTRI(3), YTRI(3), ZTRI(3)
C
DIMENSION XCU(50), YCU(50)
DIMENSION XCL(50), YCL(50)
DIMENSION XP(50), YP(50), NE(50)
C
DATA X / 0., 1., 1., 0. /
DATA Y / 0., 0., 1., 1. /
DATA Z / 0., 1., 0., 2. /
C
IDEV = 3
nlevel = 50
ncolors = 64
WRITE(*,*) ' '
WRITE(*,*) 'Contour primitives test:'
WRITE(*,*) ' (contour fills on single square polygon)'
WRITE(*,*) ' '
WRITE(*,*) 'Data points...'
do i = 1, 4
write(*,*) i,' x = ',X(i),' y = ',Y(i),' z = ',Z(i)
end do
C
C---Decide about what devices to plot to
WRITE(*,*) ' '
1 WRITE(*,*) ' Enter -1 for no PS, 0 for B&W PS, 1 for color PS'
READ(*,1000,end=2000) CHR
ips = -1
if(CHR.ne.' ') then
READ(CHR,*,end=2000,err=2000) ips
endif
IDEV = 1
IF(ips.eq.0) IDEV = 3
IF(ips.ge.1) IDEV = 5
ipslu = 0
C
C--- Get contour data
ZL = 0.
ZU = 2.
write(*,*) ' '
write(*,*) 'Contour limits ',ZL,' to ',ZU
write(*,*) 'Enter # of contour levels'
read (*,*) nlevel
C
ipslu = 0
CALL PLINITIALIZE
HUES = 'ROYGCBM'
C
C---Set up colormap spectrum colors
if(ncolors.LE.1) ncolors = 0
CALL COLORSPECTRUMHUES(ncolors,HUES)
C
do ITYP = 1, 2
C
CALL PLOPEN(0.5,ipslu,IDEV)
call newcolorname('green')
CALL PLOTABS(.75,.75,-3)
CALL PLCHAR (999.,999.,.1,'Contour test ',0.,-1)
if(ITYP.NE.2) then
WRITE(*,*) 'Polygon contoured and filled as quadrilateral'
CALL PLCHAR (999.,999.,.1,'Quadrilateral',0.,-1)
else
WRITE(*,*) 'Polygon contoured and filled as two triangles'
CALL PLCHAR (999.,999.,.1,'Two Triangles',0.,-1)
endif
CALL PLOT(0.,-0.5,-3)
CALL PLCHAR (999.,999.,.1,'Nlevels = ',0.,-1)
CALL PLNUMB (999.,999.,.1,FLOAT(nlevel),0.,-1)
CALL PLCHAR (999.,999.,.1,' Ncolors = ',0.,-1)
CALL PLNUMB (999.,999.,.1,FLOAT(ncolors),0.,-1)
CALL PLOT(2.,2.,-3)
call factor(4.)
C
C--- Set contour levels and increments
NCONT = NLEVEL + 1
DZ = (ZU-ZL)/FLOAT(NCONT)
C
DO N = 1, NCONT
ZUPR = FLOAT(N)*DZ
ZLWR = FLOAT(N-1)*DZ
C
C--- Set color based on contour #
ICOL = (NCOLORS-1)*FLOAT(N-1)/FLOAT(NCONT-1) + 1
CALL NEWCOLOR(-ICOL)
C
C--- Reset the line and area counters for each level
NA = 0
NV = 0
NCU = 0
NCL = 0
C
if(ITYP.NE.2) then
C
C--- Contour a quadrilateral
CALL CONTQUAD(X,Y,Z,ZUPR,ZLWR,
& NCU,XCU,YCU,
& NCL,XCL,YCL,
& NA,NE,NV,XP,YP)
C
else
C
C--- Triangle contouring, use two triangles, split quad on 1-3 diagonal
xtri(1) = x(1)
ytri(1) = y(1)
ztri(1) = z(1)
xtri(2) = x(2)
ytri(2) = y(2)
ztri(2) = z(2)
xtri(3) = x(3)
ytri(3) = y(3)
ztri(3) = z(3)
CALL CONTTRI(xtri,ytri,ztri,ZUPR,ZLWR,
& NCU,XCU,YCU,
& NCL,XCL,YCL,
& NA,NE,NV,XP,YP)
xtri(1) = x(3)
ytri(1) = y(3)
ztri(1) = z(3)
xtri(2) = x(4)
ytri(2) = y(4)
ztri(2) = z(4)
xtri(3) = x(1)
ytri(3) = y(1)
ztri(3) = z(1)
CALL CONTTRI(xtri,ytri,ztri,ZUPR,ZLWR,
& NCU,XCU,YCU,
& NCL,XCL,YCL,
& NA,NE,NV,XP,YP)
endif
C
C
C--- Plot the filled contour polygons
nv = 1
DO IA = 1, NA
call polyline(xp(nv),yp(nv),ne(ia),1)
nv = nv+ne(ia)
END DO
C
C--- Plot the contour lines (w/o color in this case).
C Otherwise you could leave out the polygon fills and comment out the
C color change to BLACK to get colored line contours.
C
call newcolorname('BLACK')
C--- All lower contour lines
do nn = 1, ncl,2
call plot(xcl(nn),ycl(nn),3)
call plot(xcl(nn+1),ycl(nn+1),2)
end do
C--- And the last upper line
if(N.EQ.NCONT) then
do nn = 1, ncu,2
call plot(xcu(nn),ycu(nn),3)
call plot(xcu(nn+1),ycu(nn+1),2)
end do
endif
C
END DO
CALL PLFLUSH
C
read(*,1000) chr
CALL PLOT(0.,0.,-999)
C
end do
CALL PLOT(0.,0.,+999)
C
1000 FORMAT(A)
C
2000 STOP
END
|
