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C***********************************************************************
C Module: squares.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***********************************************************************
C---Test of filled polyline plotting
C Displays a sine wave of filled color rectangles
dimension xp(100), yp(100), x(100), y(100)
C
CHARACTER*4 INP, DUMMY
LOGICAL LDBUFF
CH = 0.02
C
x(1) = 0.
y(1) = 0.
x(2) = 0.5
y(2) = 0.
x(3) = 0.5
y(3) = 0.3
x(4) = 0.
y(4) = 0.3
x(5) = x(1)
y(5) = y(1)
n = 5
C
C---Decide about what devices to plot to
WRITE(*,*) ' '
WRITE(*,*) 'SQUARES Plot test'
WRITE(*,*) ' You may just <cr> for each question to take defaults'
WRITE(*,*) ' '
WRITE(*,*) ' Double buffer? (Y/n)'
READ(*,1000,end=2000) INP
LDBUFF = .NOT.(INP.EQ.'n' .OR. INP.EQ.'N')
C
IDEV = 1
ipslu = 0
relsize = 0.7
ccc relsize = -0.7
C
C---- for REPLOT: X11 only
IDEVRP = 1
C
C
CALL PLINITIALIZE
C
C---Now, how many colors...
WRITE(*,*) ' Enter # colors (0 or 1 gives no colors)'
READ(*,1000,end=2000) INP
ncolors = 64
if(INP.ne.' ') then
READ(INP,*,end=2000,err=2000) ncolors
endif
C---Set up colormap spectrum colors
if(ncolors.LE.1) ncolors = 0
CALL COLORSPECTRUMHUES(ncolors,'MBCGYR')
C
C---Cycle the colors twice through the sinewave
10 DO IX = 1, 2*ncolors+1
C
CALL PLOPEN(relsize,ipslu,IDEV)
C---Set up double buffering for plotting
IF(LDBUFF) THEN
CALL DRAWTOBUFFER
ENDIF
C
CALL PLOT(0.5,0.5,-3)
do ii = 1,ncolors
iix = mod(ii-1+ix-1,ncolors) + 1
cc write(*,*) 'ii,ix,iix ',ii,ix,iix
call NEWCOLOR(-iix)
f = float(ii-1)/float(ncolors-1)
xx = 9.0*f
yy = 3.0*sin(2.0*3.1416*f)
do i = 1, n
xp(i) = x(i) + xx
yp(i) = 4.0 + y(i) + yy
end do
call POLYLINE(xp,yp,n,1)
end do
C
CALL NEWCOLORNAME('green')
CALL PLCHAR(0.,0.,10.*CH,'Test ',0.0,5)
CALL NEWCOLORRGB(0,0,255)
CALL PLCHAR(999.,999.,10.*CH,'of ',0.0,3)
CALL NEWCOLORNAME('yellow')
CALL PLCHAR(999.,999.,10.*CH,'Color ',0.0,6)
CALL NEWCOLORNAME('red')
CALL PLCHAR(999.,999.,10.*CH,'Fill',0.0,4)
C
C---Display the buffered plot
c IF(LDBUFF) THEN
c CALL SHOWBUFFER
c ELSE
CALL PLFLUSH
c ENDIF
C
C---Timing loop hack to slow things down
c DO I = 1, 1000000
c XXX = sin(float(i))
c END DO
C
C---Stop every frame as a check
ccc READ(5,1000) DUMMY
c
END DO
C
ccc relsize = -relsize
C
WRITE(*,*) 'Hit return to end test, R to recycle'
READ(5,1000) DUMMY
IF(DUMMY.EQ.'r' .OR. DUMMY.EQ.'R') GO TO 10
1000 FORMAT(A)
C
2000 CALL PLCLOSE
STOP
END
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