/usr/share/doc/prima/examples/spline is in libprima-perl 1.28-1.2.
This file is owned by root:root, with mode 0o755.
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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 | #!/usr/bin/perl -w
#
# Copyright (c) 1997-2003 The Protein Laboratory, University of Copenhagen
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $Id: spline.pl,v 1.6 2007/11/01 11:43:17 dk Exp $
#
=pod
=item NAME
A spline demo
=item FEATURES
Demonstrates parabolic splines as graphic primitives.
The points arount the filled shapes are spline vertexes,
which are dragable by the mouse
=cut
use strict;
use Prima qw(Application CurvedText);
my @bounds;
my @points = (
10, 10,
130, 30,
20, 20,
20, 300,
50, 300,
);
my @vectors = (
2, 2,
2, 1,
-1, -1,
-1, 3,
-2, 2,
);
my @rgb = (
0,
0,
0,
);
my @rgb_vectors = (
-1.04,
1.79,
1.38,
);
my $capture;
my $aperture = 6;
my $w = Prima::MainWindow-> create(
text => 'Spline demo',
backColor => cl::Black,
buffered => 1,
onPaint => sub {
my ( $self, $canvas) = @_;
$canvas-> clear;
my $spline = $canvas-> render_spline( [ @points, @points[0,1]]);
$canvas-> fillpoly( $spline);
if ( defined $capture) {
$canvas-> fill_ellipse(
$points[$capture], $points[$capture+1],
$aperture, $aperture
);
}
$canvas-> rop( rop::XorPut);
$canvas-> curved_text_out("Hello, world!", $spline);
my $i;
for ( $i = 0; $i < @points; $i+=2) {
$canvas-> ellipse(
$points[$i], $points[$i+1],
$aperture, $aperture
);
}
},
onSize => sub {
my ( $self, $ox, $oy, $x, $y) = @_;
@bounds = ( $x, $y);
},
onMouseDown => sub {
my ( $self, $mod, $btn, $x, $y) = @_;
my $i;
$capture = undef;
for ( $i = 0; $i < @points; $i+=2) {
if ( $points[$i] > $x - $aperture && $points[$i] < $x + $aperture &&
$points[$i+1] > $y - $aperture && $points[$i+1] < $y + $aperture) {
$capture = $i;
last;
}
}
},
onMouseUp => sub {
undef $capture;
},
onMouseMove => sub {
my ( $self, $btn, $x, $y) = @_;
return unless defined $capture;
$points[$capture] = $x if $x >= 0 && $x < $bounds[0];
$points[$capture+1] = $y if $y >= 0 && $y < $bounds[1];
},
);
$w-> insert( Timer =>
timeout => 50,
onTick => sub {
my $i;
my $idx = 0;
for ( $i = 0; $i < @points; $i++) {
next if defined $capture && ( $capture == $i || $capture == $i - 1);
$points[$i] += $vectors[$i];
if ( $points[$i] < 0) {
$points[$i] *= -1;
$vectors[$i] *= -1;
} elsif ( $points[$i] >= $bounds[$idx]) {
$points[$i] = $bounds[$idx] * 2 - $points[$i];
$vectors[$i] *= -1;
}
$idx = ($idx ? 0 : 1);
}
for ( $i = 0; $i < 3; $i++) {
$rgb[$i] += $rgb_vectors[$i];
if ( $rgb[$i] < 0) {
$rgb_vectors[$i] *= -1;
$rgb[$i] *= -1;
} elsif ( $rgb[$i] > 255) {
$rgb[$i] = 511 - $rgb[$i];
$rgb_vectors[$i] *= -1;
}
}
$w-> color( int($rgb[2]) + int($rgb[1]) * 256 + int($rgb[0]) * 65536);
},
)-> start;
run Prima;
|