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C $Id: x13f.fm4,v 1.10 2004/01/17 16:41:39 rlaboiss Exp $
C Pie chart demo.
C
C Copyright (C) 2004 Alan W. Irwin
C
C This file is part of PLplot.
C
C PLplot is free software; you can redistribute it and/or modify
C it under the terms of the GNU General Library Public License as
C published by the Free Software Foundation; either version 2 of the
C License, or (at your option) any later version.
C
C PLplot 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 Library General Public License for more details.
C
C You should have received a copy of the GNU Library General Public
C License along with PLplot; if not, write to the Free Software
C Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
implicit none
real*8 PI
parameter (PI = 3.1415926535897932384d0)
real*8 just, dx, dy, x(500), y(500), per(5)
integer i, j, dthet, theta0, theta1, theta
character*20 text(5)
data text / 'Maurice', 'Geoffrey', 'Alan', 'Rafael', 'Vince'/
integer PL_PARSE_FULL
parameter(PL_PARSE_FULL = 1)
C Process command-line arguments
call plparseopts(PL_PARSE_FULL)
per(1) = 10.d0
per(2) = 32.d0
per(3) = 12.d0
per(4) = 30.d0
per(5) = 16.d0
C Ask user to specify the output device.
call plinit()
call plenv( 0.d0, 10.d0, 0.d0, 10.d0, 1, -2 )
call plcol0(2)
C n.b. all theta quantities scaled by 2*pi/500 to be integers to avoid
C floating point logic problems.
theta0 = 0
dthet = 1
do i = 0, 4
j = 0
x(j+1) = 5.d0
y(j+1) = 5.d0
j = j + 1
C n.b. the theta quantities multiplied by 2*pi/500 afterward so
C in fact per is interpreted as a percentage.
theta1 = theta0 + 5*per(i+1)
if (i .eq. 4) theta1 = 500
do theta = theta0, theta1, dthet
x(j+1) = 5 + 3*cos((2.d0*pi/500.d0)*theta)
y(j+1) = 5 + 3*sin((2.d0*pi/500.d0)*theta)
j = j + 1
enddo
call plcol0(i+1)
call plpsty( mod(i+3, 8) + 1 )
call plfill( j, x, y )
call plcol0(1)
call plline( j, x, y )
just = (2.d0*pi/500.d0)*(theta0 + theta1) / 2.d0
dx = 0.25d0 * cos(just)
dy = 0.25d0 * sin(just)
if ((theta0 + theta1) .lt. 250 .or.
& (theta0 + theta1) .gt. 750) then
just = 0.d0
else
just = 1.d0
endif
call plptex( x(j/2+1)+dx, y(j/2+1)+dy, 1.d0, 0.d0,
& just, text(i+1) )
theta0 = theta - dthet
enddo
call plfont(2)
call plschr( 0.d0, 1.3d0)
call plptex( 5.d0, 9.d0, 1.d0, 0.d0,
& 0.5d0, 'Percentage of Sales' )
call plend
end
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