/usr/share/doc/libplplot12/examples/ada/xthick25a.adb is in libplplot-ada1-dev 5.10.0+dfsg2-0.1ubuntu2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 | -- $Id: xthick25a.adb 11680 2011-03-27 17:57:51Z airwin $
-- Filling and clipping polygons.
-- Copyright (C) 2008, 2010 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
PLplot_Auxiliary,
PLplot;
use
PLplot_Auxiliary,
PLplot;
-- Test program for filling polygons and proper clipping
procedure xthick25a is
npts : Integer := 0;
xextreme, yextreme : Real_Matrix(0 .. 8, 0 .. 1);
x0, y0 : Real_Vector(0 .. 9);
begin
-- Parse and process command line arguments
Parse_Command_Line_Arguments(Parse_Full);
-- Initialize plplot
Set_Number_Of_Subpages(3,3);
Initialize_PLplot;
xextreme(0, 0) := -120.0; xextreme(0, 1) := 120.0; yextreme(0, 0) := -120.0; yextreme(0, 1) := 120.0;
xextreme(1, 0) := -120.0; xextreme(1, 1) := 120.0; yextreme(1, 0) := 20.0; yextreme(1, 1) := 120.0;
xextreme(2, 0) := -120.0; xextreme(2, 1) := 120.0; yextreme(2, 0) := -20.0; yextreme(2, 1) := 120.0;
xextreme(3, 0) := -80.0; xextreme(3, 1) := 80.0; yextreme(3, 0) := -20.0; yextreme(3, 1) := 120.0;
xextreme(4, 0) := -220.0; xextreme(4, 1) := -120.0; yextreme(4, 0) := -120.0; yextreme(4, 1) := 120.0;
xextreme(5, 0) := -20.0; xextreme(5, 1) := 20.0; yextreme(5, 0) := -120.0; yextreme(5, 1) := 120.0;
xextreme(6, 0) := -20.0; xextreme(6, 1) := 20.0; yextreme(6, 0) := -20.0; yextreme(6, 1) := 20.0;
xextreme(7, 0) := -80.0; xextreme(7, 1) := 80.0; yextreme(7, 0) := -80.0; yextreme(7, 1) := 80.0;
xextreme(8, 0) := 20.0; xextreme(8, 1) := 120.0; yextreme(8, 0) := -120.0; yextreme(8, 1) := 120.0;
for k in 0 .. 1 loop
for j in 0 .. 3 loop
if j = 0 then
-- Polygon 1: a diamond
x0(0) := 0.0; y0(0) := -100.0;
x0(1) := -100.0; y0(1) := 0.0;
x0(2) := 0.0; y0(2) := 100.0;
x0(3) := 100.0; y0(3) := 0.0;
npts := 4;
end if;
if j = 1 then
-- Polygon 1: a diamond - reverse direction
x0(3) := 0.0; y0(3) := -100.0;
x0(2) := -100.0; y0(2) := 0.0;
x0(1) := 0.0; y0(1) := 100.0;
x0(0) := 100.0; y0(0) := 0.0;
npts := 4;
end if;
if j = 2 then
-- Polygon 2: a square with punctures
x0(0) := -100.0; y0(0) := -100.0;
x0(1) := -100.0; y0(1) := -80.0;
x0(2) := 80.0; y0(2) := 0.0;
x0(3) := -100.0; y0(3) := 80.0;
x0(4) := -100.0; y0(4) := 100.0;
x0(5) := -80.0; y0(5) := 100.0;
x0(6) := 0.0; y0(6) := 80.0;
x0(7) := 80.0; y0(7) := 100.0;
x0(8) := 100.0; y0(8) := 100.0;
x0(9) := 100.0; y0(9) := -100.0;
npts := 10;
end if;
if j = 3 then
-- Polygon 2: a square with punctures - reversed direction
x0(9) := -100.0; y0(9) := -100.0;
x0(8) := -100.0; y0(8) := -80.0;
x0(7) := 80.0; y0(7) := 0.0;
x0(6) := -100.0; y0(6) := 80.0;
x0(5) := -100.0; y0(5) := 100.0;
x0(4) := -80.0; y0(4) := 100.0;
x0(3) := 0.0; y0(3) := 80.0;
x0(2) := 80.0; y0(2) := 100.0;
x0(1) := 100.0; y0(1) := 100.0;
x0(0) := 100.0; y0(0) := -100.0;
npts := 10;
end if;
for i in xextreme'range(1) loop
Advance_To_Subpage(Next_Subpage);
Set_Viewport_Standard;
Set_Viewport_World(xextreme(i, 0), xextreme(i, 1), yextreme(i, 0), yextreme(i, 1));
declare
x0_Stop_Sucking, y0_Stop_Sucking : Real_Vector(0 .. npts - 1);
begin
x0_Stop_Sucking := x0(0 .. npts - 1);
y0_Stop_Sucking := y0(0 .. npts - 1);
Set_Pen_Color(Yellow);
Box_Around_Viewport("bc", 1.0, 0, "bcnv", 10.0, 0);
Set_Pen_Color(Red);
Select_Fill_Pattern(0);
-- Solid fill or gradient fill
if k = 0 then
Fill_Polygon(x0_Stop_Sucking, y0_Stop_Sucking);
else
Fill_Polygon_Gradient(x0_Stop_Sucking, y0_Stop_Sucking, 45.0);
end if;
Set_Pen_Color(Yellow);
Select_Line_Style(1);
Draw_Curve(x0_Stop_Sucking, y0_Stop_Sucking);
end;
end loop; -- i
end loop; -- j
end loop; -- k
-- Don't forget to call End_PLplot to finish off!
End_PLplot;
end xthick25a;
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