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! plshades demo, using color fill
!
! Copyright (C) 2004 Alan W. Irwin
!
! This file is part of PLplot.
!
! PLplot is free software; you can redistribute it and/or modify
! it under the terms of the GNU Library General Public License as
! published by the Free Software Foundation; either version 2 of the
! License, or (at your option) any later version.
!
! PLplot is distributed in the hope that it will be useful,
! but WITHOUT ANY WARRANTY; without even the implied warranty of
! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
! GNU Library General Public License for more details.
!
! You should have received a copy of the GNU Library General Public
! License along with PLplot; if not, write to the Free Software
! Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
use plplot, PI => PL_PI
implicit none
real(kind=plflt) xx, yy, argx, argy, distort, r, t
integer NLEVEL, NX, NY, PERIMETERPTS, xdim, ydim
parameter(NLEVEL = 20)
! xdim and ydim are the static dimensions of the 2D arrays while
! NX and NY are the defined area.
parameter(xdim=99, NX = 35)
parameter(ydim=100, NY = 46)
parameter(PERIMETERPTS = 100)
real(kind=plflt) clevel(NLEVEL), shedge(NLEVEL+1), &
z(xdim,ydim), w(xdim,ydim), xg1(xdim), yg1(ydim), &
xg2(xdim,ydim), yg2(xdim,ydim), zmin, zmax, &
px(PERIMETERPTS), py(PERIMETERPTS)
integer cont_color
real(kind=plflt) fill_width, cont_width
real(kind=plflt) colorbar_width, colorbar_height
integer NUM_AXES, NUM_LABELS
parameter(NUM_AXES=1, NUM_LABELS=1)
character(len=20) :: axis_opts(NUM_AXES)
integer num_values(NUM_AXES)
real(kind=plflt) values(NUM_AXES,NLEVEL+1)
real(kind=plflt) axis_ticks(NUM_AXES)
integer axis_subticks(NUM_AXES)
character(len=100) :: labels(NUM_LABELS)
integer label_opts(NUM_LABELS)
integer i, j
! dummy to fill argument list with something not currently used.
character(len=1) defined
real(kind=plflt) tr(6)
! Process command-line arguments
call plparseopts(PL_PARSE_FULL)
! Load color palettes
call plspal0('cmap0_black_on_white.pal')
call plspal1('cmap1_gray.pal',1)
! Reduce colors in cmap 0 so that cmap 1 is useful on a 16-color display
call plscmap0n(3)
! Initialize plplot
call plinit()
! Set up transformation matrix
tr(1) = 2._plflt/(NX-1)
tr(2) = 0._plflt
tr(3) = -1._plflt
tr(4) = 0._plflt
tr(5) = 2._plflt/(NY-1)
tr(6) = -1._plflt
! Calculate the data matrices.
do i=1,NX
xx = dble(i-1-(NX/2))/dble (NX/2)
do j=1,NY
yy = dble(j-1-(NY/2))/dble (NY/2) - 1.0_plflt
z(i,j) = - sin(7._plflt*xx) * cos(7._plflt*yy) + xx*xx - yy*yy
w(i,j) = - cos(7._plflt*xx) * sin(7._plflt*yy) + 2._plflt*xx*yy
enddo
enddo
call a2mnmx(z, NX, NY, zmin, zmax, xdim)
do i = 1, NLEVEL
clevel(i) = zmin + (zmax - zmin) * (i - 0.5_plflt) / dble(NLEVEL)
enddo
do i = 1, NLEVEL+1
shedge(i) = zmin + (zmax - zmin) * dble(i-1) / dble(NLEVEL)
enddo
! Build the 1-d coord arrays.
distort = 0.4_plflt
do i=1,NX
xx = -1._plflt + dble(i-1)*2._plflt/dble(NX-1)
xg1(i) = xx + distort*cos(0.5_plflt*PI*xx)
enddo
do j=1,NY
yy = -1._plflt + dble(j-1)*2._plflt/dble(NY-1)
yg1(j) = yy - distort*cos(0.5_plflt*PI*yy)
enddo
! Build the 2-d coord arrays.
do i=1,NX
xx = -1._plflt + dble(i-1)*2._plflt/dble(NX-1)
argx = 0.5_plflt*PI*xx
do j=1,NY
yy = -1._plflt + dble(j-1)*2._plflt/dble(NY-1)
argy = 0.5_plflt*PI*yy
xg2(i,j) = xx + distort*cos(argx)*cos(argy)
yg2(i,j) = yy - distort*cos(argx)*cos(argy)
enddo
enddo
! Plot using transform of index range to xmin, xmax, ymin, ymax
call pladv(0)
call plvpor(0.1_plflt, 0.9_plflt, 0.1_plflt, 0.9_plflt)
call plwind(-1.0_plflt, 1.0_plflt, -1.0_plflt, 1.0_plflt)
call plpsty(0)
fill_width = 2
cont_color = 0
cont_width = 0
axis_opts(1) = 'bcvtm'
axis_ticks(1) = 0.0_plflt
axis_subticks(1) = 0
label_opts(1) = PL_COLORBAR_LABEL_BOTTOM
labels(1) = 'Magnitude'
call plshades(z(:NX,:NY), defined, -1._plflt, 1._plflt, -1._plflt, &
1._plflt, &
shedge, fill_width, &
cont_color, cont_width )
! Smaller text
call plschr( 0.0_plflt, 0.75_plflt )
! Small ticks on the vertical axis
call plsmaj( 0.0_plflt, 0.5_plflt )
call plsmin( 0.0_plflt, 0.5_plflt )
num_values(1) = NLEVEL + 1;
values(1,:) = shedge;
call plcolorbar( colorbar_width, colorbar_height, &
ior(PL_COLORBAR_SHADE, PL_COLORBAR_SHADE_LABEL), 0, &
0.005_plflt, 0.0_plflt, 0.0375_plflt, 0.875_plflt, 0, 1, 1, &
0.0_plflt, 0.0_plflt, &
cont_color, cont_width, &
label_opts, labels, &
axis_opts, &
axis_ticks, axis_subticks, &
num_values, values )
! Reset text and tick sizes
call plschr( 0.0_plflt, 1.0_plflt )
call plsmaj( 0.0_plflt, 1.0_plflt )
call plsmin( 0.0_plflt, 1.0_plflt )
call plcol0(1)
call plbox('bcnst', 0.0_plflt, 0, 'bcnstv', 0.0_plflt, 0)
call plcol0(2)
call pllab('distance', 'altitude', 'Bogon density')
! Plot using 1d coordinate transform
call plspal0('cmap0_black_on_white.pal')
call plspal1('cmap1_blue_yellow.pal',1)
call plscmap0n(3)
call pladv(0)
call plvpor(0.1_plflt, 0.9_plflt, 0.1_plflt, 0.9_plflt)
call plwind(-1.0_plflt, 1.0_plflt, -1.0_plflt, 1.0_plflt)
call plpsty(0)
fill_width = 2
cont_color = 0
cont_width = 0
call plshades(z(:NX,:NY), defined, -1._plflt, 1._plflt, -1._plflt, &
1._plflt, &
shedge, fill_width, &
cont_color, cont_width, xg1(:NX), yg1(:NY))
! Smaller text
call plschr( 0.0_plflt, 0.75_plflt )
! Small ticks on the vertical axis
call plsmaj( 0.0_plflt, 0.5_plflt )
call plsmin( 0.0_plflt, 0.5_plflt )
num_values(1) = NLEVEL + 1;
values(1,:) = shedge;
call plcolorbar( colorbar_width, colorbar_height, &
ior(PL_COLORBAR_SHADE, PL_COLORBAR_SHADE_LABEL), 0, &
0.005_plflt, 0.0_plflt, 0.0375_plflt, 0.875_plflt, 0, 1, 1, &
0.0_plflt, 0.0_plflt, &
cont_color, cont_width, &
label_opts, labels, &
axis_opts, &
axis_ticks, axis_subticks, &
num_values, values )
! Reset text and tick sizes
call plschr( 0.0_plflt, 1.0_plflt )
call plsmaj( 0.0_plflt, 1.0_plflt )
call plsmin( 0.0_plflt, 1.0_plflt )
call plcol0(1)
call plbox('bcnst', 0.0_plflt, 0, 'bcnstv', 0.0_plflt, 0)
call plcol0(2)
call pllab('distance', 'altitude', 'Bogon density')
! Plot using 2d coordinate transform
call plspal0('cmap0_black_on_white.pal')
call plspal1('cmap1_blue_red.pal',1)
call plscmap0n(3)
call pladv(0)
call plvpor(0.1_plflt, 0.9_plflt, 0.1_plflt, 0.9_plflt)
call plwind(-1.0_plflt, 1.0_plflt, -1.0_plflt, 1.0_plflt)
call plpsty(0)
fill_width = 2
cont_color = 0
cont_width = 0
call plshades(z(:NX,:NY), defined, -1._plflt, 1._plflt, -1._plflt, &
1._plflt, &
shedge, fill_width, &
cont_color, cont_width, xg2(:NX,:NY), yg2(:NX,:NY) )
! Smaller text
call plschr( 0.0_plflt, 0.75_plflt )
! Small ticks on the vertical axis
call plsmaj( 0.0_plflt, 0.5_plflt )
call plsmin( 0.0_plflt, 0.5_plflt )
num_values(1) = NLEVEL + 1;
values(1,:) = shedge;
call plcolorbar( colorbar_width, colorbar_height, &
ior(PL_COLORBAR_SHADE, PL_COLORBAR_SHADE_LABEL), 0, &
0.005_plflt, 0.0_plflt, 0.0375_plflt, 0.875_plflt, 0, 1, 1, &
0.0_plflt, 0.0_plflt, &
cont_color, cont_width, &
label_opts, labels, &
axis_opts, &
axis_ticks, axis_subticks, &
num_values, values )
! Reset text and tick sizes
call plschr( 0.0_plflt, 1.0_plflt )
call plsmaj( 0.0_plflt, 1.0_plflt )
call plsmin( 0.0_plflt, 1.0_plflt )
call plcol0(1)
call plbox('bcnst', 0.0_plflt, 0, 'bcnstv', 0.0_plflt, 0)
call plcol0(2)
call plcont(w, 1, nx, 1, ny, clevel, xg2, yg2)
call pllab('distance', 'altitude', &
'Bogon density, with streamlines')
! Plot using 2d coordinate transform and plshades contours.
call plspal0('')
call plspal1('',1)
call plscmap0n(3)
call pladv(0)
call plvpor(0.1_plflt, 0.9_plflt, 0.1_plflt, 0.9_plflt)
call plwind(-1.0_plflt, 1.0_plflt, -1.0_plflt, 1.0_plflt)
call plpsty(0)
fill_width = 2
cont_color = 2
cont_width = 3
call plshades(z(:NX,:NY), defined, -1._plflt, 1._plflt, -1._plflt, &
1._plflt, &
shedge, fill_width, &
cont_color, cont_width, xg2(:NX,:NY), yg2(:NX,:NY) )
! Smaller text
call plschr( 0.0_plflt, 0.75_plflt )
! Small ticks on the vertical axis
call plsmaj( 0.0_plflt, 0.5_plflt )
call plsmin( 0.0_plflt, 0.5_plflt )
num_values(1) = NLEVEL + 1;
values(1,:) = shedge;
call plcolorbar( colorbar_width, colorbar_height, &
ior(PL_COLORBAR_SHADE, PL_COLORBAR_SHADE_LABEL), 0, &
0.005_plflt, 0.0_plflt, 0.0375_plflt, 0.875_plflt, 0, 1, 1, &
0.0_plflt, 0.0_plflt, &
2, 3._plflt, &
label_opts, labels, &
axis_opts, &
axis_ticks, axis_subticks, &
num_values, values )
! Reset text and tick sizes
call plschr( 0.0_plflt, 1.0_plflt )
call plsmaj( 0.0_plflt, 1.0_plflt )
call plsmin( 0.0_plflt, 1.0_plflt )
call plcol0(1)
call plbox('bcnst', 0.0_plflt, 0, 'bcnstv', 0.0_plflt, 0)
call plcol0(2)
call pllab('distance', 'altitude', 'Bogon density')
! Example with polar coordinates.
call plspal0('cmap0_black_on_white.pal')
call plspal1('cmap1_gray.pal',1)
call plscmap0n(3)
call pladv(0)
call plvpor(0.1d0, 0.9d0, 0.1d0, 0.9d0)
call plwind(-1.d0, 1.d0, -1.d0, 1.d0)
call plpsty(0)
! Build new coordinate matrices.
do i = 1, NX
r = dble(i-1)/dble(NX-1)
do j = 1, NY
t = (2._plflt*PI/dble(NY-1))*dble(j-1)
xg2(i,j) = r*cos(t)
yg2(i,j) = r*sin(t)
z(i,j) = exp(-r*r)*cos(5._plflt*PI*r)*cos(5._plflt*t)
enddo
enddo
! Need a new shedge to go along with the new data set.
call a2mnmx(z, NX, NY, zmin, zmax, xdim)
do i = 1, NLEVEL+1
shedge(i) = zmin + (zmax - zmin) * dble(i-1) / dble(NLEVEL)
enddo
! Now we can shade the interior region.
fill_width = 2
cont_color = 0
cont_width = 0
call plshades(z(:NX,:NY), defined, -1._plflt, 1._plflt, -1._plflt, &
1._plflt, &
shedge, fill_width, &
cont_color, cont_width, xg2(:NX,:NY), yg2(:NX,:NY) )
! Smaller text
call plschr( 0.0_plflt, 0.75_plflt )
! Small ticks on the vertical axis
call plsmaj( 0.0_plflt, 0.5_plflt )
call plsmin( 0.0_plflt, 0.5_plflt )
num_values(1) = NLEVEL + 1;
values(1,:) = shedge;
call plcolorbar( colorbar_width, colorbar_height, &
ior(PL_COLORBAR_SHADE, PL_COLORBAR_SHADE_LABEL), 0, &
0.005_plflt, 0.0_plflt, 0.0375_plflt, 0.875_plflt, 0, 1, 1, &
0.0_plflt, 0.0_plflt, &
cont_color, cont_width, &
label_opts, labels, &
axis_opts, &
axis_ticks, axis_subticks, &
num_values, values )
! Reset text and tick sizes
call plschr( 0.0_plflt, 1.0_plflt )
call plsmaj( 0.0_plflt, 1.0_plflt )
call plsmin( 0.0_plflt, 1.0_plflt )
! Now we can draw the perimeter. (If do before, shade stuff may overlap.)
do i = 1, PERIMETERPTS
t = (2._plflt*PI/dble(PERIMETERPTS-1))*dble(i-1)
px(i) = cos(t)
py(i) = sin(t)
enddo
call plcol0(1)
call plline(px, py)
! And label the plot.
call plcol0(2)
call pllab( '', '', 'Tokamak Bogon Instability' )
call plend
end
!----------------------------------------------------------------------------
! Subroutine a2mnmx
! Minimum and the maximum elements of a 2-d array.
subroutine a2mnmx(f, nx, ny, fmin, fmax, xdim)
use plplot
implicit none
integer i, j, nx, ny, xdim
real(kind=plflt) 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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