Qt Quick 3D - Particles 3D Testbed Example

 // Copyright (C) 2023 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause

 import QtQuick
 import QtQuick3D
 import QtQuick3D.Particles3D

 Item {
     id: mainWindow

     property bool fill: checkBoxFill.checked

     anchors.fill: parent

     View3D {
         anchors.fill: parent

         environment: SceneEnvironment {
             clearColor: "#202020"
             backgroundMode: SceneEnvironment.Color
             antialiasingMode: AppSettings.antialiasingMode
             antialiasingQuality: AppSettings.antialiasingQuality
         }

         PerspectiveCamera {
             id: camera
             property real cameraAnim: 0
             SequentialAnimation {
                 running: true
                 loops: Animation.Infinite
                 NumberAnimation {
                     target: camera
                     property: "cameraAnim"
                     to: 1
                     duration: 2000
                     easing.type: Easing.InOutQuad
                 }
                 NumberAnimation {
                     target: camera
                     property: "cameraAnim"
                     to: 0
                     duration: 2000
                     easing.type: Easing.InOutQuad
                 }
             }
             position: Qt.vector3d(0, 400 + cameraAnim * 400, 800 - cameraAnim * 800)
             eulerRotation: Qt.vector3d(-30 - cameraAnim * 60, 0, 0)
         }

         PointLight {
             position: Qt.vector3d(0, 400, 0)
             brightness: 10
             ambientColor: Qt.rgba(0.3, 0.3, 0.3, 1.0)
         }

         ParticleSystem3D {
             id: psystem

             NumberAnimation on eulerRotation.y {
                 running: true
                 loops: Animation.Infinite
                 from: 0
                 to: 360
                 duration: 12000
             }

             // Particles
             SpriteParticle3D {
                 id: particleWhite
                 sprite: Texture {
                     source: "images/dot.png"
                 }
                 maxAmount: 4000 * 3
                 color: "#ffffff"
                 billboard: true
             }

             // Emitters, one per particle
             ParticleEmitter3D {
                 particle: particleWhite
                 position: Qt.vector3d(-300, 0, 0)
                 scale: Qt.vector3d(2.0, 2.0, 3.0)
                 shape: ParticleShape3D {
                     type: ParticleShape3D.Cube
                     fill: mainWindow.fill
                 }
                 emitRate: sliderEmitRate.sliderValue
                 lifeSpan: 2000
                 depthBias: depthBias.sliderValue
                 Model {
                     source: "#Cube"
                     opacity: 0.4
                     materials: DefaultMaterial {
                     }
                 }
             }
             ParticleEmitter3D {
                 particle: particleWhite
                 position: Qt.vector3d(0, 0, 0)
                 scale: Qt.vector3d(2.0, 2.0, 3.0)
                 shape: ParticleShape3D {
                     type: ParticleShape3D.Sphere
                     fill: mainWindow.fill
                 }
                 emitRate: sliderEmitRate.sliderValue
                 lifeSpan: 2000
                 depthBias: depthBias.sliderValue
                 Model {
                     source: "#Sphere"
                     opacity: 0.4
                     materials: DefaultMaterial {
                     }
                 }
             }
             ParticleEmitter3D {
                 particle: particleWhite
                 position: Qt.vector3d(300, 0, 0)
                 scale: Qt.vector3d(2.0, 2.0, 3.0)
                 shape: ParticleShape3D {
                     type: ParticleShape3D.Cylinder
                     fill: mainWindow.fill
                 }
                 emitRate: sliderEmitRate.sliderValue
                 lifeSpan: 2000
                 depthBias: depthBias.sliderValue
                 Model {
                     source: "#Cylinder"
                     opacity: 0.4
                     materials: DefaultMaterial {
                     }
                 }
             }
         }
     }

     SettingsView {
         CustomCheckBox {
             id: checkBoxFill
             text: "Fill"
             checked: false
         }
         CustomLabel {
             text: "Particles emitRate"
         }
         CustomSlider {
             id: sliderEmitRate
             sliderValue: 1000
             fromValue: 0
             toValue: 2000
         }
         CustomLabel {
             text: "Particle depthBias"
         }
         CustomSlider {
             id: depthBias
             sliderValue: -20
             fromValue: -20
             toValue: 20
         }
     }

     LoggingView {
         anchors.bottom: parent.bottom
         particleSystems: [psystem]
     }
 }