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-- Shade plot demo.
-- Maurice LeBrun
-- IFS, University of Texas at Austin
-- 31 Aug 1993
-- Copyright (C) 2008 Jerry Bauck
-- 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,
System,
Ada.Numerics.Long_Elementary_Functions,
PLplot,
PLplot_Auxiliary;
use
Ada.Numerics,
Ada.Numerics.Long_Elementary_Functions,
PLplot,
PLplot_Auxiliary;
procedure xthick15a is
XPTS : constant Integer := 35; -- Data points in x
YPTS : constant Integer := 46; -- Data points in y
zmin, zmax, xx, yy : Long_Float;
z : Real_Matrix(0 .. XPTS - 1, 0 .. YPTS - 1);
----------------------------------------------------------------------------
-- cmap1_init2
-- Initializes color map 1 in HLS space.
----------------------------------------------------------------------------
procedure cmap1_init2 is
i, h, l, s : Real_Vector(0 .. 3);
begin
-- Set control points.
i(0) := 0.0; -- left boundary
i(1) := 0.45; -- just before center
i(2) := 0.55; -- just after center
i(3) := 1.0; -- right boundary
-- Set hue levels.
h(0) := 260.0; -- low: blue-violet
h(1) := 260.0; -- only change as we go over vertex
h(2) := 20.0; -- hue -- high: red
h(3) := 20.0; -- keep fixed
-- Set lightness levels.
l(0) := 0.6; -- low
l(1) := 0.0; -- center
l(2) := 0.0; -- center
l(3) := 0.6; -- high
-- Set saturation levels.
s(0) := 1.0; -- low
s(1) := 0.5; -- center
s(2) := 0.5; -- center
s(3) := 1.0; -- high
Set_Color_Map_1_Piecewise(HLS, i, h, l, s, Alt_Hue_Path_None);
end cmap1_init2;
----------------------------------------------------------------------------
-- plot1
-- Illustrates a single shaded region.
----------------------------------------------------------------------------
procedure plot1 is
shade_min, shade_max, sh_color : Long_Float;
sh_cmap : Integer := 0;
sh_width : Long_Float;
min_color, max_color : Integer;
min_width, max_width : Long_Float;
begin
Advance_To_Subpage(Next_Subpage);
Set_Viewport_Normalized(0.1, 0.9, 0.1, 0.9);
Set_Viewport_World(-1.0, 1.0, -1.0, 1.0);
-- Plot using identity transform --
shade_min := zmin + (zmax-zmin) * 0.4;
shade_max := zmin + (zmax-zmin) * 0.6;
sh_color := 7.0;
sh_width := 2.0;
min_color := 9;
max_color := 2;
min_width := 2.0;
max_width := 2.0;
Select_Fill_Pattern(8);
Shade_Region_1(z, Mask_Function_No_Mask'access, -1.0, 1.0, -1.0, 1.0,
shade_min, shade_max,
sh_cmap, sh_color, sh_width,
min_color, min_width, max_color, max_width,
Fill_Polygon'access, True, Null, System.Null_Address);
Set_Pen_Color(Red);
Box_Around_Viewport("bcnst", 0.0, 0, "bcnstv", 0.0, 0);
Set_Pen_Color(Yellow);
Write_Labels("distance", "altitude", "Bogon flux");
end plot1;
----------------------------------------------------------------------------
-- plot2
-- Illustrates multiple adjacent shaded regions, using different fill
-- patterns for each region.
----------------------------------------------------------------------------
procedure plot2 is
shade_min, shade_max, sh_color : Long_Float;
sh_cmap : Integer := 0;
sh_width : Long_Float;
min_color, max_color : Integer := 0;
min_width, max_width : Long_Float := 0.0;
-- C run amok. The following arrays are made to accommodate the
-- original example which is written in perverse C.
inc_0_To_4 : array (0 .. 4) of Integer_Array_1D(0 .. 0);
inc_5_To_9 : array (5 .. 9) of Integer_Array_1D(0 .. 1) :=
((450, -450), (0, 900), (0, 450), (450, -450), (0, 900));
del_0_To_4 : array (0 .. 4) of Integer_Array_1D(0 .. 0);
del_5_To_9 : array (5 .. 9) of Integer_Array_1D(0 .. 1) :=
((2000, 2000), (2000, 2000), (2000, 2000), (4000, 4000), (4000, 2000));
begin
-- Initialize the rest of the amokified arrays.
inc_0_To_4(0)(0) := 450;
inc_0_To_4(1)(0) := -450;
inc_0_To_4(2)(0) := 0;
inc_0_To_4(3)(0) := 900;
inc_0_To_4(4)(0) := 300;
del_0_To_4(0)(0) := 2000;
del_0_To_4(1)(0) := 2000;
del_0_To_4(2)(0) := 2000;
del_0_To_4(3)(0) := 2000;
del_0_To_4(4)(0) := 2000;
sh_width := 2.0;
Advance_To_Subpage(Next_Subpage);
Set_Viewport_Normalized(0.1, 0.9, 0.1, 0.9);
Set_Viewport_World(-1.0, 1.0, -1.0, 1.0);
-- Plot using identity transform
for i in 0 .. 9 loop
shade_min := zmin + (zmax - zmin) * Long_Float(i) / 10.0;
shade_max := zmin + (zmax - zmin) * Long_Float(i +1) / 10.0;
sh_color := Long_Float(i + 6);
if i in 0 .. 4 then
Set_Fill_Pattern(inc_0_To_4(i), del_0_To_4(i));
else
Set_Fill_Pattern(inc_5_To_9(i), del_5_To_9(i));
end if;
Shade_Region_1(z, Mask_Function_No_Mask'access, -1.0, 1.0, -1.0, 1.0,
shade_min, shade_max,
sh_cmap, sh_color, sh_width,
min_color, min_width, max_color, max_width,
Fill_Polygon'access, True, Null, System.Null_Address);
end loop;
Set_Pen_Color(Red);
Box_Around_Viewport("bcnst", 0.0, 0, "bcnstv", 0.0, 0);
Set_Pen_Color(Yellow);
Write_Labels("distance", "altitude", "Bogon flux");
end plot2;
----------------------------------------------------------------------------
-- plot3
-- Illustrates shaded regions in 3d, using a different fill pattern for
-- each region.
----------------------------------------------------------------------------
procedure plot3 is
xx : array (0 .. 1) of Real_Vector(0 ..4) :=
((-1.0, 1.0, 1.0, -1.0, -1.0),
(-1.0, 1.0, 1.0, -1.0, -1.0));
yy : array (0 .. 1) of Real_Vector(0 ..4) :=
((1.0, 1.0, 0.0, 0.0, 1.0),
(-1.0, -1.0, 0.0, 0.0, -1.0));
zz : array (0 .. 1) of Real_Vector(0 ..4) :=
((0.0, 0.0, 1.0, 1.0, 0.0),
(0.0, 0.0, 1.0, 1.0, 0.0));
begin
Advance_To_Subpage(Next_Subpage);
Set_Viewport_Normalized(0.1, 0.9, 0.1, 0.9);
Set_Viewport_World(-1.0, 1.0, -1.0, 1.0);
Set_Up_3D(1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 0.0, 1.5, 30.0, -40.0);
-- Plot using identity transform
Set_Pen_Color(Red);
Box_Around_Viewport_3D("bntu", "X", 0.0, 0, "bntu", "Y", 0.0, 0, "bcdfntu", "Z", 0.5, 0);
Set_Pen_Color(Yellow);
Write_Labels("","","3-d polygon filling");
Set_Pen_Color(Green);
Select_Fill_Pattern(1);
Draw_Curve_3D(xx(0), yy(0), zz(0));
Fill_Polygon_3D(xx(0)(0 .. 3), yy(0)(0 .. 3), zz(0)(0 .. 3));
Select_Fill_Pattern(2);
Draw_Curve_3D(xx(1), yy(1), zz(1));
Fill_Polygon_3D(xx(1)(0 .. 3), yy(1)(0 .. 3), zz(1)(0 .. 3));
end;
begin
-- Parse and process command line arguments
Parse_Command_Line_Arguments(Parse_Full);
-- Set up color map 1
cmap1_init2;
-- Initialize plplot
Initialize_PLplot;
-- Set up data array
for i in z'range(1) loop
xx := Long_Float(i - XPTS / 2) / Long_Float(XPTS / 2);
for j in z'range(2) loop
yy := Long_Float(j - YPTS / 2) / Long_Float(YPTS / 2) - 1.0;
z(i, j) := xx*xx - yy*yy + (xx - yy)/(xx*xx+yy*yy + 0.1);
end loop;
end loop;
zmin := Matrix_Min(z);
zmax := Matrix_Max(z);
plot1;
plot2;
plot3;
End_PLplot;
end xthick15a;
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