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c Shade plot demo.
c Does a variety of shade plots.
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 Library General 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
implicit none
integer xdim, ydim, XPTS, YPTS
c xdim and ydim are the static dimensions of the 2D arrays while
c NX and NY are the defined area.
parameter( xdim = 99, XPTS = 35, ydim = 100, YPTS = 46 )
integer i, j
real*8 xx, yy
real*8 z(xdim, ydim), zmin, zmax
include 'plplot_parameters.h'
c Process command-line arguments
call plparseopts(PL_PARSE_FULL)
c Set up color map 1 (but comment out because this makes
c no difference for the current cmap0 plshade calls in plot1 and plot2.)
c call cmap1_init2()
c Initialize plplot
call plinit()
c Set up data array
do i = 1,XPTS
xx = dble(i-1 - (XPTS / 2)) / dble(XPTS / 2)
do j = 1,YPTS
yy = dble(j-1 - (YPTS / 2)) / dble(YPTS / 2) - 1.0d0
z(i,j) = xx*xx - yy*yy + (xx - yy)/(xx*xx+yy*yy + 0.1d0)
enddo
enddo
call a2mnmx(z, XPTS, YPTS, zmin, zmax, xdim)
call plot1(z, XPTS, YPTS, zmin, zmax, xdim)
call plot2(z, XPTS, YPTS, zmin, zmax, xdim)
call plot3()
call plend()
end
c -------------------------------------------------------------------------
c cmap1_init1
c
c Initializes color map 1 in HLS space.
c -------------------------------------------------------------------------
subroutine cmap1_init1()
implicit none
real*8 i(4), h(4), l(4), s(4)
integer rev(4)
i(1) = 0.0d0 ! left boundary
i(2) = 0.45d0 ! just before center
i(3) = 0.55d0 ! just after center
i(4) = 1.0d0 ! right boundary
h(1) = 260.0d0 ! hue -- low: blue-violet
h(2) = 260.0d0 ! only change as we go over vertex
h(3) = 20.0d0 ! hue -- high: red
h(4) = 20.0d0 ! keep fixed
l(1) = 0.5d0 ! lightness -- low
l(2) = 0.0d0 ! lightness -- center
l(3) = 0.0d0 ! lightness -- center
l(4) = 0.5d0 ! lightness -- high
c call plscolbg(255,255,255)
c l(1) = 0.5d0 ! lightness -- low
c l(2) = 1.0d0 ! lightness -- center
c l(3) = 1.0d0 ! lightness -- center
c l(4) = 0.5d0 ! lightness -- high
s(1) = 1.0d0 ! maximum saturation
s(2) = 1.0d0 ! maximum saturation
s(3) = 1.0d0 ! maximum saturation
s(4) = 1.0d0 ! maximum saturation
rev(1) = 0
rev(2) = 0
rev(3) = 0
rev(4) = 0
call plscmap1l(0, 4, i, h, l, s, rev)
end
c -------------------------------------------------------------------------
c cmap1_init2
c
c Initializes color map 1 in HLS space.
c -------------------------------------------------------------------------
subroutine cmap1_init2()
implicit none
real*8 i(4), h(4), l(4), s(4)
integer rev(4)
i(1) = 0.0d0 ! left boundary
i(2) = 0.45d0 ! just before center
i(3) = 0.55d0 ! just after center
i(4) = 1.0d0 ! right boundary
h(1) = 260.0d0 ! hue -- low: blue-violet
h(2) = 260.0d0 ! only change as we go over vertex
h(3) = 20.0d0 ! hue -- high: red
h(4) = 20.0d0 ! keep fixed
l(1) = 0.6d0 ! lightness -- low
l(2) = 0.0d0 ! lightness -- center
l(3) = 0.0d0 ! lightness -- center
l(4) = 0.6d0 ! lightness -- high
c call plscolbg(255,255,255)
c l(1) = 0.5d0 ! lightness -- low
c l(2) = 1.0d0 ! lightness -- center
c l(3) = 1.0d0 ! lightness -- center
c l(4) = 0.5d0 ! lightness -- high
s(1) = 1.0d0 ! maximum saturation
s(2) = 0.5d0 ! maximum saturation
s(3) = 0.5d0 ! maximum saturation
s(4) = 1.0d0 ! maximum saturation
rev(1) = 0
rev(2) = 0
rev(3) = 0
rev(4) = 0
call plscmap1l(0, 4, i, h, l, s, rev)
end
c -------------------------------------------------------------------------
c plot1
c
c Illustrates a single shaded region.
c -------------------------------------------------------------------------
subroutine plot1(z, XPTS, YPTS, zmin, zmax, xdim)
implicit none
integer xdim, XPTS, YPTS
real*8 z(xdim,YPTS), zmin, zmax
character*1 undefined
real*8 shade_min, shade_max, sh_color
integer sh_cmap, sh_width
integer min_color, min_width, max_color, max_width
sh_cmap = 0
min_color = 0
min_width = 0
max_color = 0
max_width = 0
call pladv(0)
call plvpor( 0.1d0, 0.9d0, 0.1d0, 0.9d0)
call plwind(-1.0d0, 1.0d0, -1.0d0, 1.0d0)
c Plot using identity transform
shade_min = zmin + (zmax-zmin)*0.4d0
shade_max = zmin + (zmax-zmin)*0.6d0
sh_color = 7
sh_width = 2
min_color = 9
max_color = 2
min_width = 2
max_width = 2
call plpsty(8)
c Use_ plshade0 instead of plshade1 - identity mapping
call plshade0(z, XPTS, YPTS, undefined,
& -1.d0, 1.d0, -1.d0, 1.d0,
& shade_min, shade_max,
& sh_cmap, sh_color, sh_width,
& min_color, min_width, max_color, max_width, xdim)
call plcol0(1)
call plbox('bcnst', 0.0d0, 0, 'bcnstv', 0.0d0, 0)
call plcol0(2)
call pllab('distance', 'altitude', 'Bogon flux')
end
c -------------------------------------------------------------------------
c plot2
c
c Illustrates multiple adjacent shaded regions, using different fill
c patterns for each region.
c -------------------------------------------------------------------------
subroutine plot2(z, XPTS, YPTS, zmin, zmax, xdim)
implicit none
integer xdim, XPTS, YPTS
real*8 z(xdim,YPTS), zmin, zmax
character*1 undefined
real*8 shade_min, shade_max, sh_color
integer sh_cmap, sh_width
integer min_color, min_width, max_color, max_width
integer i,j
integer nlin(10), inc(2,10), del(2,10)
data nlin /1, 1, 1, 1, 1, 2, 2, 2, 2, 2/
data ( (inc(i,j), i=1,2), j=1,10) /
& 450, 0, -450, 0, 0, 0, 900, 0,
& 300, 0, 450,-450, 0, 900, 0, 450,
& 450, -450, 0, 900/
data ( (del(i,j), i=1,2), j=1,10) /
& 2000, 2000, 2000, 2000, 2000, 2000,
& 2000, 2000, 2000, 2000, 2000, 2000,
& 2000, 2000, 2000, 2000, 4000, 4000,
& 4000, 2000/
sh_cmap = 0
min_color = 0
min_width = 0
max_color = 0
max_width = 0
sh_width = 2
call pladv(0)
call plvpor( 0.1d0, 0.9d0, 0.1d0, 0.9d0)
call plwind(-1.0d0, 1.0d0, -1.0d0, 1.0d0)
c Plot using identity transform
do i = 1,10
shade_min = zmin + (zmax - zmin) * (i-1) / 10.0d0
shade_max = zmin + (zmax - zmin) * i / 10.0d0
sh_color = i+5
call plpat(nlin(i),inc(1,i),del(1,i))
c Use_ plshade0 instead of plshade1 - identity mapping
call plshade0(z, XPTS, YPTS, undefined,
& -1.d0, 1.d0, -1.d0, 1.d0,
& shade_min, shade_max,
& sh_cmap, sh_color, sh_width,
& min_color, min_width, max_color, max_width, xdim)
enddo
call plcol0(1)
call plbox('bcnst', 0.0d0, 0, 'bcnstv', 0.0d0, 0)
call plcol0(2)
call pllab('distance', 'altitude', 'Bogon flux')
end
c--------------------------------------------------------------------------
c plot3
c
c Illustrates shaded regions in 3d, using a different fill pattern for
c each region.
c--------------------------------------------------------------------------
subroutine plot3
implicit none
real*8 xx1(5), xx2(5), yy1(5), yy2(5), zz1(5), zz2(5)
data xx1 / -1.0d0, 1.0d0, 1.0d0, -1.0d0, -1.0d0/
data xx2 / -1.0d0, 1.0d0, 1.0d0, -1.0d0, -1.0d0/
data yy1 /1.0d0, 1.0d0, 0.0d0, 0.0d0, 1.0d0/
data yy2 / -1.0d0, -1.0d0, 0.0d0, 0.0d0, -1.0d0/
data zz1 / 0.0d0, 0.0d0, 1.0d0, 1.0d0, 0.0d0/
data zz2 / 0.0d0, 0.0d0, 1.0d0, 1.0d0, 0.0d0/
call pladv(0)
call plvpor(0.1d0, 0.9d0, 0.1d0, 0.9d0)
call plwind(-1.0d0, 1.0d0, -1.0d0, 1.0d0)
call plw3d(1.d0, 1.d0, 1.d0, -1.0d0, 1.0d0, -1.0d0, 1.0d0, 0.0d0,
& 1.5d0, 30.d0, -40.d0)
c Plot using identity transform
call plcol0(1)
call plbox3("bntu", "X", 0.0d0, 0, "bntu", "Y", 0.0d0, 0,
& "bcdfntu", "Z", 0.5d0, 0)
call plcol0(2)
call pllab("","","3-d polygon filling")
call plcol0(3)
call plpsty(1)
call plline3(5, xx1, yy1, zz1)
call plfill3(4, xx1, yy1, zz1)
call plpsty(2)
call plline3(5, xx2, yy2, zz2)
call plfill3(4, xx2, yy2, zz2)
end
c----------------------------------------------------------------------------
c Subroutine a2mnmx
c Minimum and the maximum elements of a 2-d array.
subroutine a2mnmx(f, nx, ny, fmin, fmax, xdim)
implicit none
integer i, j, nx, ny, xdim
real*8 f(xdim, ny), fmin, fmax
fmax = f(1, 1)
fmin = fmax
do j = 1, ny
do i = 1, nx
fmax = max(fmax, f(i, j))
fmin = min(fmin, f(i, j))
enddo
enddo
end
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