blob: cc58b90f19dc6c62388707d11243990668bc857e (
plain)
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
|
/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQuick module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
****************************************************************************/
#include "qquickellipseextruder_p.h"
#include <qmath.h>
#include <qrandom.h>
QT_BEGIN_NAMESPACE
/*!
\qmltype EllipseShape
\instantiates QQuickEllipseExtruder
\inqmlmodule QtQuick.Particles
\ingroup qtquick-particles
\inherits Shape
\brief Represents an ellipse to other particle system elements.
This shape can be used by Emitter subclasses and Affector subclasses to have
them act upon an ellipse shaped area.
*/
QQuickEllipseExtruder::QQuickEllipseExtruder(QObject *parent) :
QQuickParticleExtruder(parent)
, m_fill(true)
{
}
/*!
\qmlproperty bool QtQuick.Particles::EllipseShape::fill
If fill is true the ellipse is filled; otherwise it is just a border.
Default is true.
*/
QPointF QQuickEllipseExtruder::extrude(const QRectF & r)
{
qreal theta = QRandomGenerator::global()->bounded(2 * M_PI);
qreal mag = m_fill ? QRandomGenerator::global()->generateDouble() : 1;
return QPointF(r.x() + r.width()/2 + mag * (r.width()/2) * qCos(theta),
r.y() + r.height()/2 + mag * (r.height()/2) * qSin(theta));
}
bool QQuickEllipseExtruder::contains(const QRectF &bounds, const QPointF &point)
{
if (!bounds.contains(point))
return false;
QPointF relPoint(bounds.center() - point);
qreal xa = relPoint.x()/bounds.width();
qreal yb = relPoint.y()/bounds.height();
return (xa * xa + yb * yb) < 0.25;
}
QT_END_NAMESPACE
#include "moc_qquickellipseextruder_p.cpp"
|
