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/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** 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.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of The Qt Company Ltd nor the names of its
** contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
import QtQuick 2.0
import QtQuick.Particles 2.0
ParticleSystem {
id: sys
width: 360
height: 600
running: true
Rectangle {
z: -1
anchors.fill: parent
color: "black"
}
property real petalLength: 180
property real petalRotation: 0
NumberAnimation on petalRotation {
from: 0;
to: 360;
loops: -1;
running: true
duration: 24000
}
function convert(a) {return a*(Math.PI/180);}
Emitter {
lifeSpan: 4000
emitRate: 120
size: 12
anchors.centerIn: parent
//! [0]
onEmitParticles: (particles) => {
for (var i=0; i<particles.length; i++) {
var particle = particles[i];
particle.startSize = Math.max(02,Math.min(492,Math.tan(particle.t/2)*24));
var theta = Math.floor(Math.random() * 6.0);
particle.red = theta == 0 || theta == 1 || theta == 2 ? 0.2 : 1;
particle.green = theta == 2 || theta == 3 || theta == 4 ? 0.2 : 1;
particle.blue = theta == 4 || theta == 5 || theta == 0 ? 0.2 : 1;
theta /= 6.0;
theta *= 2.0*Math.PI;
theta += sys.convert(sys.petalRotation);//Convert from degrees to radians
particle.initialVX = sys.petalLength * Math.cos(theta);
particle.initialVY = sys.petalLength * Math.sin(theta);
particle.initialAX = particle.initialVX * -0.5;
particle.initialAY = particle.initialVY * -0.5;
}
}
//! [0]
}
ImageParticle {
source: "qrc:///particleresources/fuzzydot.png"
alpha: 0.0
}
}
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