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-- Multiple window and color map 0 demo.
-- Copyright (C) 2007 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
with
Ada.Numerics,
Ada.Numerics.Long_Elementary_Functions,
Ada.Strings,
Ada.Strings.Fixed,
PLplot_Auxiliary,
PLplot_Traditional;
use
Ada.Numerics,
Ada.Numerics.Long_Elementary_Functions,
Ada.Strings,
Ada.Strings.Fixed,
PLplot_Auxiliary,
PLplot_Traditional;
------------------------------------------------------------------------------
-- Demonstrates multiple windows and color map 0 palette, both default and
-- user-modified.
------------------------------------------------------------------------------
procedure xtraditional02a is
--------------------------------------------------------------------------
-- draw_windows
-- Draws a set of numbered boxes with colors according to cmap0 entry.
--------------------------------------------------------------------------
procedure draw_windows(nw, cmap0_offset : Integer) is
vmin, vmax : Long_Float;
begin
plschr(0.0, 3.5);
plfont(4);
for i in 0..(nw-1) loop
plcol0(i+cmap0_offset);
pladv(0);
vmin := 0.1;
vmax := 0.9;
for j in 0..2 loop
plwidth(Long_Float(j + 1));
plvpor(vmin, vmax, vmin, vmax);
plwind(0.0, 1.0, 0.0, 1.0);
plbox("bc", 0.0, 0, "bc", 0.0, 0);
vmin := vmin + 0.1;
vmax := vmax - 0.1;
end loop;
plwidth(1.0);
plptex(0.5, 0.5, 1.0, 0.0, 0.5, Trim(Integer'image(i), Left));
end loop;
end draw_windows;
--------------------------------------------------------------------------
-- demo1
-- Demonstrates multiple windows and default color map 0 palette.
--------------------------------------------------------------------------
procedure demo1 is
begin
plbop;
-- Divide screen into 16 regions
plssub(4, 4);
draw_windows(16, 0);
pleop;
end demo1;
--------------------------------------------------------------------------
-- demo2
-- Demonstrates multiple windows, user-modified color map 0 palette, and
-- HLS -> RGB translation.
--------------------------------------------------------------------------
procedure demo2 is
-- Set up cmap0
-- Use 100 custom colors in addition to base 16
r, g, b: Integer_Array_1D(0..115);
-- Min & max lightness values
lmin : Long_Float := 0.15;
lmax : Long_Float := 0.85;
h, l, s : Long_Float;
r1, g1, b1 : Long_Float;
begin
plbop;
-- Divide screen into 100 regions.
plssub(10, 10);
for i in 0..99 loop
-- Bounds on HLS, from plhlsrgb() commentary
-- hue [0., 360.] degrees
-- lightness [0., 1.] magnitude
-- saturation [0., 1.] magnitude
-- Vary hue uniformly from left to right
h := (360.0 / 10.0 ) * Long_Float( i mod 10 );
-- Vary lightness uniformly from top to bottom, between min & max.
l := lmin + (lmax - lmin) * Long_Float(i / 10) / 9.0;
-- Use max saturation.
s := 1.0;
plhlsrgb(h, l, s, r1, g1, b1);
-- Ada converts floats to integers by rounding while C does so by
-- truncation. There is no fool-proof way to fix that but this is pretty
-- close: Add a bit less than 1/2 to the float before converting. A good
-- number to use appears to be about 0.5 - 10^-16 which _might_
-- be an exact fix for 64-bit floats since they have about 16 digits
-- of accuracy.
r(i+16) := Integer((r1 * 255.001) - 0.499999999999999);
g(i+16) := Integer((g1 * 255.001) - 0.499999999999999);
b(i+16) := Integer((b1 * 255.001) - 0.499999999999999);
end loop;
-- Load default cmap0 colors into our custom set.
for i in 0..15 loop
plgcol0(i, r(i), g(i), b(i));
end loop;
-- Now set cmap0 all at once (faster, since fewer driver calls).
plscmap0(r, g, b);
draw_windows(100, 16);
pleop;
end demo2;
begin
-- Parse and process command line arguments.
plparseopts(PL_PARSE_FULL);
-- Initialize plplot.
plinit;
-- Run demos.
demo1;
demo2;
-- Don't forget to call plend to finish off!
plend;
end xtraditional02a;
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