Qt Quick 3D - Particles 3D Testbed Example

 /****************************************************************************
 **
 ** Copyright (C) 2021 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
 import QtQuick3D
 import QtQuick3D.Particles3D

 Item {
     anchors.fill: parent

     View3D {
         id: view
         anchors.fill: parent

         PointLight {
             color: "white"
             ambientColor: "gray"
             brightness: 2.0
         }

         Model {
             source: "#Rectangle"
             eulerRotation: Qt.vector3d(-90, 0, 0)
             scale: Qt.vector3d(10, 10, 1)
             materials: [ DefaultMaterial {
                     diffuseColor: "red"
                 }
             ]
         }

         Model {
             source: "#Cube"
             scale: Qt.vector3d(0.3, 0.3, 0.3)
             materials: [DefaultMaterial {
                     diffuseColor: "white"
                 }
             ]
         }

         Component {
             id: particleComponent
             Model {
                 source: "#Cube"
                 scale: Qt.vector3d(0.1, 0.1, 0.1)
                 materials: PrincipledMaterial {
                     metalness: 0.5
                     roughness: 0
                     specularAmount: 1.0
                 }
                 opacity: 0.75
             }
         }

         ParticleSystem3D {
             id: psystem

             ModelParticle3D {
                 id: modelParticle
                 delegate: particleComponent
                 maxAmount: 60
                 color: Qt.rgba(0.5, 0.5, 0.5, 0.5)
                 colorVariation: Qt.vector4d(0.5, 0.5, 0.5, 0.15)
                 sortMode: sortModeSelectionBox.selection
             }

             SpriteParticle3D {
                 id: spriteParticle
                 color: Qt.rgba(0.75, 0.75, 0.75, 0.75)
                 colorVariation: Qt.vector4d(0.5, 0.5, 0.5, 0.05)
                 maxAmount: 60
                 billboard: true
                 sortMode: sortModeSelectionBox.selection
             }

             // Emitters, one per particle
             ParticleEmitter3D {
                 x: 35
                 particle: spriteParticle
                 particleScaleVariation: 0.3
                 velocity: VectorDirection3D {
                     direction: Qt.vector3d(0, 5, 15)
                     directionVariation: Qt.vector3d(0, 0, 5)
                 }
                 emitRate: 10
                 lifeSpan: 6000
             }
             ParticleEmitter3D {
                 x: -35
                 particle: modelParticle
                 particleScaleVariation: 0.2
                 velocity: VectorDirection3D {
                     direction: Qt.vector3d(0, 5, 15)
                 }
                 emitRate: 10
                 lifeSpan: 6000
             }
         }

         Node {
             property real rot: 0.0
             PropertyAnimation on rot {
                 from: 0.0
                 to: 360.0
                 duration: 10000
                 loops: Animation.Infinite
                 running: true
                 paused: !checkBoxRotateCamera.checked
             }
             eulerRotation: Qt.vector3d(0, rot, 0)
             PerspectiveCamera {
                 y: 20
                 z: 100
             }
         }

         environment: SceneEnvironment {
             clearColor: "darkGray"
             backgroundMode: SceneEnvironment.Color
         }
     }
     SettingsView {
         id: settingsView
         CustomSelectionBox {
             id: sortModeSelectionBox
             text: "Mode"
             values: ["SortNone", "SortNewest", "SortOldest", "SortDistance"]
             parentWidth: settingsView.width
         }
         CustomCheckBox {
             id: checkBoxRotateCamera
             text: "Rotate camera"
             checked: false
         }
     }
     LoggingView {
         anchors.bottom: parent.bottom
         particleSystems: [psystem]
     }
 }