| 1 | // Copyright (C) 2016 The Qt Company Ltd. |
|---|---|
| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
| 3 | |
| 4 | #include "qquickellipseextruder_p.h" |
| 5 | #include <qmath.h> |
| 6 | #include <qrandom.h> |
| 7 | |
| 8 | QT_BEGIN_NAMESPACE |
| 9 | /*! |
| 10 | \qmltype EllipseShape |
| 11 | \instantiates QQuickEllipseExtruder |
| 12 | \inqmlmodule QtQuick.Particles |
| 13 | \ingroup qtquick-particles |
| 14 | \inherits Shape |
| 15 | \brief Represents an ellipse to other particle system elements. |
| 16 | |
| 17 | This shape can be used by Emitter subclasses and Affector subclasses to have |
| 18 | them act upon an ellipse shaped area. |
| 19 | */ |
| 20 | QQuickEllipseExtruder::QQuickEllipseExtruder(QObject *parent) : |
| 21 | QQuickParticleExtruder(parent) |
| 22 | , m_fill(true) |
| 23 | { |
| 24 | } |
| 25 | |
| 26 | /*! |
| 27 | \qmlproperty bool QtQuick.Particles::EllipseShape::fill |
| 28 | If fill is true the ellipse is filled; otherwise it is just a border. |
| 29 | |
| 30 | Default is true. |
| 31 | */ |
| 32 | |
| 33 | QPointF QQuickEllipseExtruder::extrude(const QRectF & r) |
| 34 | { |
| 35 | qreal theta = QRandomGenerator::global()->bounded(highest: 2 * M_PI); |
| 36 | qreal mag = m_fill ? QRandomGenerator::global()->generateDouble() : 1; |
| 37 | return QPointF(r.x() + r.width()/2 + mag * (r.width()/2) * qCos(v: theta), |
| 38 | r.y() + r.height()/2 + mag * (r.height()/2) * qSin(v: theta)); |
| 39 | } |
| 40 | |
| 41 | bool QQuickEllipseExtruder::contains(const QRectF &bounds, const QPointF &point) |
| 42 | { |
| 43 | if (!bounds.contains(p: point)) |
| 44 | return false; |
| 45 | |
| 46 | QPointF relPoint(bounds.center() - point); |
| 47 | qreal xa = relPoint.x()/bounds.width(); |
| 48 | qreal yb = relPoint.y()/bounds.height(); |
| 49 | return (xa * xa + yb * yb) < 0.25; |
| 50 | } |
| 51 | |
| 52 | QT_END_NAMESPACE |
| 53 | |
| 54 | #include "moc_qquickellipseextruder_p.cpp" |
| 55 |