Qt Quick 3D - Particles 3D Testbed Example

 // Copyright (C) 2021 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause

 import QtQuick
 import QtQuick3D
 import QtQuick3D.Particles3D

 Item {
     id: mainWindow

     anchors.fill: parent

     View3D {
         id: view3D
         anchors.fill: parent
         camera: camera

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

         PerspectiveCamera {
             id: camera
             position: Qt.vector3d(0, 0, 600)
         }

         PointLight {
             position: Qt.vector3d(400, 600, 400)
             brightness: 80
             ambientColor: Qt.rgba(0.3, 0.3, 0.3, 1.0)
         }

         Component {
             id: particleComponent
             Model {
                 source: "#Cube"
                 scale: Qt.vector3d(0.5, 0.5, 0.5)
                 materials: DefaultMaterial {
                 }
             }
         }

         Component {
             id: particleComponentStar
             Model {
                 source: "#Rectangle"
                 scale: Qt.vector3d(0.1, 0.1, 0.0)
                 materials: DefaultMaterial {
                     diffuseMap: Texture {
                         source: "images/star2.png"
                     }
                 }
             }
         }

         ParticleSystem3D {
             id: psystem

             // Particles
             ModelParticle3D {
                 id: particleCube
                 delegate: particleComponent
                 maxAmount: 4
                 color: "#ffffff"
                 colorVariation: Qt.vector4d(0.4, 0.4, 0.4, 0.0)
                 unifiedColorVariation: true
             }
             ModelParticle3D {
                 id: particleSpark
                 delegate: particleComponentStar
                 maxAmount: 600
                 fadeInDuration: 200
                 fadeOutDuration: 500
                 color: "#ffffff"
                 colorVariation: Qt.vector4d(0.4, 0.4, 0.4, 0.8)
                 unifiedColorVariation: true

             }
             ModelParticle3D {
                 id: particleSpark2
                 delegate: particleComponentStar
                 maxAmount: 1000
                 fadeInDuration: 200
                 fadeOutDuration: 500
                 color: "#ff6060"
                 colorVariation: Qt.vector4d(0.5, 0.2, 0.2, 0.5)
                 unifiedColorVariation: true
             }
             ModelParticle3D {
                 id: particleStar
                 delegate: particleComponentStar
                 maxAmount: 1000
                 color: "#ffee60"
                 colorVariation: Qt.vector4d(0.6, 0.6, 0.2, 0.5)
                 unifiedColorVariation: true
             }

             ParticleEmitter3D {
                 particle: particleCube
                 position: Qt.vector3d(-550, -300, 0)
                 particleScaleVariation: 0.4
                 particleRotationVariation: Qt.vector3d(180, 180, 180)
                 particleRotationVelocityVariation: Qt.vector3d(200, 200, 200);
                 velocity: VectorDirection3D {
                     direction: Qt.vector3d(250, 400, 0)
                     directionVariation: Qt.vector3d(50, 50, 50)
                 }
                 emitRate: 1
                 lifeSpan: 4000
             }

             TrailEmitter3D {
                 id: trailEmitter
                 particle: particleSpark
                 follow: particleCube
                 particleScale: 1.5
                 particleScaleVariation: 0.5
                 particleRotationVariation: Qt.vector3d(20, 20, 180)
                 particleRotationVelocityVariation: Qt.vector3d(100, 100, 100);
                 velocity: VectorDirection3D {
                     directionVariation: Qt.vector3d(20, 20, 20)
                 }
                 emitRate: sliderEmitRate.sliderValue
                 lifeSpan: 1000
             }

             TrailEmitter3D {
                 id: trailEmitter2
                 particle: particleSpark2
                 follow: particleCube
                 particleScale: 2.5
                 particleScaleVariation: 0.5
                 particleRotationVariation: Qt.vector3d(20, 20, 180)
                 particleRotationVelocityVariation: Qt.vector3d(100, 100, 100);
                 velocity: VectorDirection3D {
                     directionVariation: Qt.vector3d(100, 100, 100)
                 }
                 lifeSpan: 1000
             }

             ParticleEmitter3D {
                 id: starEmitter
                 particle: particleStar
                 particleScale: 5.0
                 particleScaleVariation: 3.0
                 particleRotationVariation: Qt.vector3d(0, 0, 180)
                 particleRotationVelocityVariation: Qt.vector3d(100, 100, 100);
                 velocity: VectorDirection3D {
                     direction: Qt.vector3d(0, 500, 0)
                     directionVariation: Qt.vector3d(80, 80, 80)
                 }
                 lifeSpan: 1000
             }

             Gravity3D {
                 direction: Qt.vector3d(0, 1, 0)
                 magnitude: -200
             }
         }
     }

     MouseArea {
         anchors.fill: parent
         onClicked: {
             trailEmitter2.burst(50);
             var pos = view3D.mapTo3DScene(Qt.vector3d(mouseX, mouseY, camera.z));
             starEmitter.burst(sliderBurstAmount.sliderValue,
                               sliderBurstDuration.sliderValue,
                               pos);

         }
     }

     Text {
         anchors.centerIn: parent
         font.pointSize: AppSettings.fontSizeLarge
         color: "#ffffff"
         text: qsTr("Click to burst!")
     }

     SettingsView {
         CustomLabel {
             text: "Burst amount"
         }
         CustomSlider {
             id: sliderBurstAmount
             sliderValue: 100
             fromValue: 10
             toValue: 200
         }
         CustomLabel {
             text: "Burst duration"
         }
         CustomSlider {
             id: sliderBurstDuration
             sliderValue: 100
             fromValue: 0
             toValue: 1000
         }
         CustomLabel {
             text: "Trail emitRate"
         }
         CustomSlider {
             id: sliderEmitRate
             sliderValue: 100
             fromValue: 0
             toValue: 150
         }
     }

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