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| |
| #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" |