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
|
package CannonField;
use strict;
use warnings;
use QtCore4;
use QtGui4;
use QtCore4::isa qw(Qt::Widget);
use QtCore4::slots setAngle => ['int'],
setForce => ['int'],
shoot => [],
moveShot => [];
use QtCore4::signals angleChanged => ['int'],
forceChanged => ['int'];
sub NEW {
shift->SUPER::NEW(@_);
this->{currentAngle} = 45;
this->{currentForce} = 0;
this->{timerCount} = 0;
my $autoShootTimer = Qt::Timer(this);
this->{autoShootTimer} = $autoShootTimer;
this->connect( $autoShootTimer, SIGNAL 'timeout()', this, SLOT 'moveShot()' );
this->{shootAngle} = 0;
this->{shootForce} = 0;
this->setPalette(Qt::Palette(Qt::Color(250,250,200)));
this->setAutoFillBackground(1);
}
sub setAngle {
my ( $angle ) = @_;
if ($angle < 5) {
$angle = 5;
}
if ($angle > 70) {
$angle = 70;
}
if (this->{currentAngle} == $angle) {
return;
}
this->{currentAngle} = $angle;
this->update(this->cannonRect());
emit angleChanged( this->{currentAngle} );
}
sub setForce {
my ( $force ) = @_;
if ($force < 0) {
$force = 0;
}
if (this->{currentForce} == $force) {
return;
}
this->{currentForce} = $force;
emit forceChanged( this->{currentForce} );
}
sub shoot {
my $autoShootTimer = this->{autoShootTimer};
if ($autoShootTimer->isActive()) {
return;
}
this->{timerCount} = 0;
this->{shootAngle} = this->{currentAngle};
this->{shootForce} = this->{currentForce};
$autoShootTimer->start(5);
}
sub moveShot {
my $region = shotRect();
this->{timerCount}++;
my $shotR = shotRect();
if ($shotR->x() > this->width() || $shotR->y() > this->height()) {
this->{autoShootTimer}->stop();
}
else {
$region = $region->unite($shotR);
}
this->update($region);
}
my $barrelRect = Qt::Rect(30, -5, 20, 10);
sub paintEvent {
my $painter = Qt::Painter(this);
if (this->{autoShootTimer}->isActive()){
#paintShot($painter);
$painter->setPen(Qt::NoPen());
$painter->setBrush(Qt::Brush(Qt::black()));
$painter->drawRect(shotRect());
}
#paintCannon($painter);
$painter->setPen(Qt::NoPen());
$painter->setBrush(Qt::Brush(Qt::blue()));
$painter->translate(0, this->rect()->height());
$painter->drawPie(Qt::Rect(-35, -35, 70, 70), 0, 90 * 16);
$painter->rotate(-(this->{currentAngle}));
$painter->drawRect($barrelRect);
$painter->end();
}
sub cannonRect {
my $result = Qt::Rect(0, 0, 50, 50);
$result->moveBottomLeft(this->rect()->bottomLeft());
return $result;
}
sub shotRect {
my $gravity = 4;
my $time = this->{timerCount} / 20.0;
my $velocity = this->{shootForce};
my $radians = this->{shootAngle} * 3.14159265 / 180;
my $velx = $velocity * cos($radians);
my $vely = $velocity * sin($radians);
my $x0 = ($barrelRect->right() + 5) * cos($radians);
my $y0 = ($barrelRect->right() + 5) * sin($radians);
my $x = $x0 + $velx * $time;
my $y = $y0 + $vely * $time - 0.5 * $gravity * $time * $time;
$x = int($x + .5);
$y = int($y + .5);
my $result = Qt::Rect(0, 0, 6, 6);
$result->moveCenter(Qt::Point( $x, this->height() - 1 - $y ));
return $result;
}
1;
|
