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39
40#include "qquickellipseextruder_p.h"
41#include <qmath.h>
42#include <qrandom.h>
43
44QT_BEGIN_NAMESPACE
45/*!
46 \qmltype EllipseShape
47 \instantiates QQuickEllipseExtruder
48 \inqmlmodule QtQuick.Particles
49 \ingroup qtquick-particles
50 \inherits Shape
51 \brief Represents an ellipse to other particle system elements.
52
53 This shape can be used by Emitter subclasses and Affector subclasses to have
54 them act upon an ellipse shaped area.
55*/
56QQuickEllipseExtruder::QQuickEllipseExtruder(QObject *parent) :
57 QQuickParticleExtruder(parent)
58 , m_fill(true)
59{
60}
61
62/*!
63 \qmlproperty bool QtQuick.Particles::EllipseShape::fill
64 If fill is true the ellipse is filled; otherwise it is just a border.
65
66 Default is true.
67*/
68
69QPointF QQuickEllipseExtruder::extrude(const QRectF & r)
70{
71 qreal theta = QRandomGenerator::global()->bounded(highest: 2 * M_PI);
72 qreal mag = m_fill ? QRandomGenerator::global()->generateDouble() : 1;
73 return QPointF(r.x() + r.width()/2 + mag * (r.width()/2) * qCos(v: theta),
74 r.y() + r.height()/2 + mag * (r.height()/2) * qSin(v: theta));
75}
76
77bool QQuickEllipseExtruder::contains(const QRectF &bounds, const QPointF &point)
78{
79 if (!bounds.contains(p: point))
80 return false;
81
82 QPointF relPoint(bounds.center() - point);
83 qreal xa = relPoint.x()/bounds.width();
84 qreal yb = relPoint.y()/bounds.height();
85 return (xa * xa + yb * yb) < 0.25;
86}
87
88QT_END_NAMESPACE
89
90#include "moc_qquickellipseextruder_p.cpp"
91

source code of qtdeclarative/src/particles/qquickellipseextruder.cpp