Qt 5.8 | Qt Quick | Qt Quick Particles Examples - Affectors | turbulence.qml Example File

Qt 5.8.0 Reference Documentation

# turbulence.qml Example File

particles/affectors/content/turbulence.qml

      /****************************************************************************
      **
      ** Copyright (C) 2015 The Qt Company Ltd.
      ** Contact: http://www.qt.io/licensing/
      **
      ** This file is part of the examples of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:BSD$
      ** 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

      Rectangle {
          width: 320
          height: 480
          color: "#222222"
          id: root
          Image {
              source: "../../images/candle.png"
              anchors.bottom: parent.bottom
              anchors.horizontalCenter: parent.horizontalCenter
              anchors.bottomMargin: -60
              anchors.horizontalCenterOffset: 2
          }
          ParticleSystem {
              anchors.fill: parent
              MouseArea {
                  anchors.fill: parent
                  onClicked: turb.enabled = !turb.enabled
              }

              Turbulence {
                  id: turb
                  enabled: true
                  height: (parent.height / 2) - 4
                  width: parent.width
                  x: parent. width / 4
                  anchors.fill: parent
                  strength: 32
                  NumberAnimation on strength{from: 16; to: 64; easing.type: Easing.InOutBounce; duration: 1800; loops: -1}
              }

              ImageParticle {
                  groups: ["smoke"]
                  source: "qrc:///particleresources/glowdot.png"
                  color: "#11111111"
                  colorVariation: 0
              }
              ImageParticle {
                  groups: ["flame"]
                  source: "qrc:///particleresources/glowdot.png"
                  color: "#11ff400f"
                  colorVariation: 0.1
              }
              Emitter {
                  anchors.centerIn: parent
                  group: "flame"

                  emitRate: 120
                  lifeSpan: 1200
                  size: 20
                  endSize: 10
                  sizeVariation: 10
                  acceleration: PointDirection { y: -40 }
                  velocity: AngleDirection { angle: 270; magnitude: 20; angleVariation: 22; magnitudeVariation: 5 }
              }
              TrailEmitter {
                  id: smoke1
                  width: root.width
                  height: root.height/2
                  group: "smoke"
                  follow: "flame"

                  emitRatePerParticle: 1
                  lifeSpan: 2400
                  lifeSpanVariation: 400
                  size: 16
                  endSize: 8
                  sizeVariation: 8
                  acceleration: PointDirection { y: -40 }
                  velocity: AngleDirection { angle: 270; magnitude: 40; angleVariation: 22; magnitudeVariation: 5 }
              }
              TrailEmitter {
                  id: smoke2
                  width: root.width
                  height: root.height/2 - 20
                  group: "smoke"
                  follow: "flame"

                  emitRatePerParticle: 4
                  lifeSpan: 2400
                  size: 36
                  endSize: 24
                  sizeVariation: 12
                  acceleration: PointDirection { y: -40 }
                  velocity: AngleDirection { angle: 270; magnitude: 40; angleVariation: 22; magnitudeVariation: 5 }
              }
          }
      }