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

     anchors.fill: parent

     View3D {
         anchors.fill: parent

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

         PerspectiveCamera {
             id: camera
             position: Qt.vector3d(0, 100, 600)
         }

         PointLight {
             position: Qt.vector3d(0, 400, 100)
             brightness: 10
             ambientColor: Qt.rgba(0.3, 0.3, 0.3, 1.0)
         }

         // Model shared between particles
         Component {
             id: particleComponent
             Model {
                 source: "#Cube"
                 scale: Qt.vector3d(0.4, 0.4, 0.4)
                 materials: DefaultMaterial {
                 }
             }
         }

         ParticleSystem3D {
             id: psystem

             // Particles
             ModelParticle3D {
                 id: particleNone
                 delegate: particleComponent
                 maxAmount: 40
                 color: "#ffffff"
                 fadeInEffect: ModelParticle3D.FadeNone
                 fadeOutEffect: ModelParticle3D.FadeNone
                 hasTransparency: false
             }
             ModelParticle3D {
                 id: particleOpacity
                 delegate: particleComponent
                 maxAmount: 40
                 color: "#ffffff"
                 fadeInEffect: ModelParticle3D.FadeOpacity
                 fadeOutEffect: ModelParticle3D.FadeOpacity
                 fadeInDuration: sliderFadeInDuration.sliderValue
                 fadeOutDuration: sliderFadeOutDuration.sliderValue
             }
             ModelParticle3D {
                 id: particleScale
                 delegate: particleComponent
                 maxAmount: 40
                 color: "#ffffff"
                 fadeInEffect: ModelParticle3D.FadeScale
                 fadeOutEffect: ModelParticle3D.FadeScale
                 fadeInDuration: sliderFadeInDuration.sliderValue
                 fadeOutDuration: sliderFadeOutDuration.sliderValue
             }
             ModelParticle3D {
                 id: particleScaleOpacity
                 delegate: particleComponent
                 maxAmount: 40
                 color: "#ffffff"
                 fadeInEffect: ModelParticle3D.FadeScale
                 fadeOutEffect: ModelParticle3D.FadeOpacity
                 fadeInDuration: sliderFadeInDuration.sliderValue
                 fadeOutDuration: sliderFadeOutDuration.sliderValue
             }

             // Emitters, one per particle
             ParticleEmitter3D {
                 particle: particleNone
                 position: Qt.vector3d(300, 200, 0)
                 particleScaleVariation: 0.5
                 particleRotationVariation: Qt.vector3d(180, 180, 180)
                 particleRotationVelocityVariation: Qt.vector3d(200, 200, 200);
                 velocity: VectorDirection3D {
                     direction: Qt.vector3d(-200, 0, 0)
                 }
                 emitRate: 10
                 lifeSpan: 4000
                 Node {
                     x: 80
                     Text {
                         anchors.verticalCenter: parent.verticalCenter
                         text: "NONE"
                         font.pointSize: AppSettings.fontSizeLarge
                         color: "#ffffff"
                     }
                 }
             }
             ParticleEmitter3D {
                 particle: particleOpacity
                 position: Qt.vector3d(300, 100, 0)
                 particleScaleVariation: 0.5
                 particleRotationVariation: Qt.vector3d(180, 180, 180)
                 particleRotationVelocityVariation: Qt.vector3d(200, 200, 200);
                 velocity: VectorDirection3D {
                     direction: Qt.vector3d(-200, 0, 0)
                 }
                 emitRate: 10
                 lifeSpan: 4000
                 Node {
                     x: 80
                     Text {
                         anchors.verticalCenter: parent.verticalCenter
                         text: "OPACITY"
                         font.pointSize: AppSettings.fontSizeLarge
                         color: "#ffffff"
                     }
                 }
             }
             ParticleEmitter3D {
                 particle: particleScale
                 position: Qt.vector3d(300, 0, 0)
                 particleScaleVariation: 0.5
                 particleRotationVariation: Qt.vector3d(180, 180, 180)
                 particleRotationVelocityVariation: Qt.vector3d(200, 200, 200);
                 velocity: VectorDirection3D {
                     direction: Qt.vector3d(-200, 0, 0)
                 }
                 emitRate: 10
                 lifeSpan: 4000
                 Node {
                     x: 80
                     Text {
                         anchors.verticalCenter: parent.verticalCenter
                         text: "SCALE"
                         font.pointSize: AppSettings.fontSizeLarge
                         color: "#ffffff"
                     }
                 }
             }
             ParticleEmitter3D {
                 particle: particleScaleOpacity
                 position: Qt.vector3d(300, -100, 0)
                 particleScaleVariation: 0.5
                 particleRotationVariation: Qt.vector3d(180, 180, 180)
                 particleRotationVelocityVariation: Qt.vector3d(200, 200, 200);
                 velocity: VectorDirection3D {
                     direction: Qt.vector3d(-200, 0, 0)
                 }
                 emitRate: 10
                 lifeSpan: 4000
                 Node {
                     x: 80
                     Text {
                         anchors.verticalCenter: parent.verticalCenter
                         text: "SCALE -> OPACITY"
                         font.pointSize: AppSettings.fontSizeLarge
                         color: "#ffffff"
                     }
                 }
             }
         }
     }

     SettingsView {
         CustomLabel {
             text: "Fade In Duration (ms)"
         }
         CustomSlider {
             id: sliderFadeInDuration
             sliderValue: 1500
             fromValue: 0
             toValue: 4000
         }
         CustomLabel {
             text: "Fade Out Duration (ms)"
         }
         CustomSlider {
             id: sliderFadeOutDuration
             sliderValue: 1500
             fromValue: 0
             toValue: 4000
         }
     }

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