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