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
         camera: camera

         environment: SceneEnvironment {
             clearColor: "#000000"
             backgroundMode: SceneEnvironment.Color
             antialiasingMode: AppSettings.antialiasingMode
             antialiasingQuality: AppSettings.antialiasingQuality
         }

         // Particles light
         PointLight {
             id: pointLight
             property real animatedBrightness: 1.0
             position: psystemStar.position
             brightness: sliderLightBrightness.sliderValue * animatedBrightness
             // Add some liveness to the light
             SequentialAnimation {
                 loops: Animation.Infinite
                 running: true
                 NumberAnimation {
                     target: pointLight
                     property: "animatedBrightness"
                     to: 1.2
                     duration: 1200
                     easing.type: Easing.OutElastic
                 }
                 NumberAnimation {
                     target: pointLight
                     property: "animatedBrightness"
                     to: 1.0
                     duration: 1600
                     easing.type: Easing.OutElastic
                 }
             }
         }

         // General light to the scene
         PointLight {
             position: Qt.vector3d(300, 500, 600)
             // Brigness coming from the amount of trail particles
             brightness: 0.1 + sliderSmokeEmitRate.sliderValue * 0.4 + sliderStardustEmitRate.sliderValue * 0.1
             ambientColor: Qt.rgba(0.4, 0.1, 0.1, 1.0)
             color: "#ff8080"
         }

         // Animate the camera position & rotation
         Node {
             PerspectiveCamera {
                 id: camera
                 position: Qt.vector3d(0, 300, 800)
                 eulerRotation.x: -20
                 SequentialAnimation on z {
                     loops: Animation.Infinite
                     NumberAnimation {
                         to: 500
                         duration: 4000
                         easing.type: Easing.InOutQuad
                     }
                     NumberAnimation {
                         to: 800
                         duration: 4000
                         easing.type: Easing.InOutQuad
                     }
                 }
             }
             SequentialAnimation on eulerRotation.y {
                 loops: Animation.Infinite
                 NumberAnimation {
                     to: -20
                     duration: 2000
                     easing.type: Easing.InOutQuad
                 }
                 NumberAnimation {
                     to: 20
                     duration: 2000
                     easing.type: Easing.InOutQuad
                 }
             }
         }

         // Background wall
         Model {
             source: "#Rectangle"
             scale: Qt.vector3d(80, 50, 0)
             z: -500
             y: -600
             materials: DefaultMaterial {
                 diffuseColor: "#201010"
             }
         }

         // Qt Cube model
         Model {
             source: "#Cube"
             z: 10
             y: 20
             scale: Qt.vector3d(2.0, 2.0, 2.0)

             NumberAnimation on eulerRotation.y {
                 loops: Animation.Infinite
                 from: 0
                 to: 360
                 duration: 5000
             }
             materials: PrincipledMaterial {
                 baseColorMap: Texture {
                     source: "images/qt_logo2.png"
                 }
                 normalMap: Texture {
                     source: "images/qt_logo2_n.png"
                 }
             }
         }

         // System for the trail particles
         ParticleSystem3D {
             id: psystemTrail

             SpriteParticle3D {
                 id: smokeParticle
                 sprite: Texture {
                     source: "images/smoke_sprite.png"
                 }
                 maxAmount: 600
                 spriteSequence: SpriteSequence3D {
                     frameCount: 15
                     interpolate: true
                 }
                 billboard: true
                 blendMode: SpriteParticle3D.Screen
                 colorTable: Texture {
                     source: "images/color_table2.png"
                 }
                 colorVariation: Qt.vector4d(0.0, 0.0, 0.0, 0.8)
                 fadeInEffect: Particle3D.FadeScale
                 fadeInDuration: 100
                 fadeOutEffect: Particle3D.FadeOpacity
                 fadeOutDuration: 1500
             }

             ParticleEmitter3D {
                 id: smokeEmitter
                 particle: smokeParticle
                 position: psystemStar.position
                 particleScale: 20
                 particleScaleVariation: 5
                 particleEndScale: 30
                 particleEndScaleVariation: 10
                 particleRotationVariation: Qt.vector3d(0, 0, 180)
                 particleRotationVelocityVariation: Qt.vector3d(0, 0, 40)
                 emitRate: sliderSmokeEmitRate.sliderValue
                 lifeSpan: sliderSmokeLifeSpan.sliderValue
                 lifeSpanVariation: 1000
             }

             SpriteParticle3D {
                 id: dustParticle
                 sprite: Texture {
                     source: "images/dust.png"
                 }
                 maxAmount: 600
                 blendMode: SpriteParticle3D.Screen
                 color: "#ff8080"
                 colorVariation: Qt.vector4d(0.2, 0.4, 0.4, 0.6)
                 billboard: true
                 fadeInDuration: 200
                 fadeOutDuration: 1500
             }

             ParticleEmitter3D {
                 id: dustEmitter
                 particle: dustParticle
                 position: psystemStar.position
                 emitRate: sliderStardustEmitRate.sliderValue
                 lifeSpan: sliderStardustLifeSpan.sliderValue
                 lifeSpanVariation: 1000
                 particleScale: 20.0
                 particleScaleVariation: 10.0
                 particleRotationVariation: Qt.vector3d(40, 40, 180)
                 particleRotationVelocityVariation: Qt.vector3d(0, 0, 10)
             }

             Wander3D {
                 uniqueAmount: Qt.vector3d(40, 40, 0)
                 uniqueAmountVariation: 0.8
                 uniquePace: Qt.vector3d(0.1, 0.1, 0)
                 uniquePaceVariation: 0.8
                 fadeInDuration: 3000
             }
         }

         // System for the star sphere particles
         ParticleSystem3D {
             id: psystemStar
             position: Qt.vector3d(0, -200, 0)

             // Animate x & y in a heart shape
             // This could be done also with Timeline & Keyframes
             SequentialAnimation on x {
                 running: true
                 loops: Animation.Infinite
                 NumberAnimation {
                     to: -300
                     duration: 1500
                     easing.type: Easing.OutSine
                 }
                 NumberAnimation {
                     to: 300
                     duration: 3000
                     easing.type: Easing.InOutQuad
                 }
                 NumberAnimation {
                     to: 0
                     duration: 1500
                     easing.type: Easing.InSine
                 }
             }
             SequentialAnimation on y {
                 running: true
                 loops: Animation.Infinite
                 NumberAnimation {
                     to: 300
                     duration: 2250
                     easing.type: Easing.OutSine
                 }
                 NumberAnimation {
                     to: 150
                     duration: 750
                     easing.type: Easing.InQuad
                 }
                 NumberAnimation {
                     to: 300
                     duration: 750
                     easing.type: Easing.OutQuad
                 }
                 NumberAnimation {
                     to: -300
                     duration: 2250
                     easing.type: Easing.InSine
                 }
             }

             Vector3dAnimation {
                 running: true
                 loops: Animation.Infinite
                 target: psystemStar
                 property: "eulerRotation"
                 from: Qt.vector3d(0, 0, 0)
                 to: Qt.vector3d(0, 360, -720)
                 duration: 4000
             }

             SpriteParticle3D {
                 id: dotParticle
                 sprite: Texture {
                     source: "images/sphere.png"
                 }
                 maxAmount: 200
                 color: Qt.rgba(1.0, 0.8, 0.8, sliderLightBrightness.sliderValue / 300)
                 colorVariation: Qt.vector4d(0.0, 0.4, 0.4, 0.2)
                 blendMode: SpriteParticle3D.Screen
             }

             ParticleEmitter3D {
                 id: dotParticleEmitter
                 particle: dotParticle
                 scale: Qt.vector3d(0.8, 0.8, 0.8)
                 particleScale: 2.5
                 particleScaleVariation: 2.0
                 emitRate: 200
                 lifeSpan: 1000
                 shape: ParticleShape3D {
                     type: ParticleShape3D.Sphere
                     fill: false
                 }
             }
         }
     }

     SettingsView {
         CustomLabel {
             text: "Smoke emitrate"
         }
         CustomSlider {
             id: sliderSmokeEmitRate
             sliderValue: 50
             fromValue: 0
             toValue: 100
         }
         CustomLabel {
             text: "Smoke lifeSpan"
         }
         CustomSlider {
             id: sliderSmokeLifeSpan
             sliderValue: 3000
             fromValue: 1000
             toValue: 5000
         }
         CustomLabel {
             text: "Stardust emitrate"
         }
         CustomSlider {
             id: sliderStardustEmitRate
             sliderValue: 50
             fromValue: 0
             toValue: 100
         }
         CustomLabel {
             text: "Stardust lifeSpan"
         }
         CustomSlider {
             id: sliderStardustLifeSpan
             sliderValue: 4000
             fromValue: 1000
             toValue: 5000
         }
         CustomLabel {
             text: "Star brightness"
         }
         CustomSlider {
             id: sliderLightBrightness
             sliderValue: 50
             fromValue: 1
             toValue: 200
         }
     }

     LoggingView {
         anchors.bottom: parent.bottom
         particleSystems: [psystemStar, psystemTrail]
     }
 }