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, 0, 600)
         }

         PointLight {
             position: Qt.vector3d(0, 400, 0)
             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(0.02, 0.02, 0.15)
                 materials: DefaultMaterial {
                     lighting: DefaultMaterial.NoLighting
                 }
             }
         }

         Model {
             id: emittingSphere
             source: "#Sphere"
             scale: Qt.vector3d(0.5, 0.5, 0.5)
             materials: DefaultMaterial {
                 opacity: 0.4
             }

             position: Qt.vector3d(-200, 100, 0)
             SequentialAnimation on x {
                 running: true
                 loops: Animation.Infinite
                 NumberAnimation {
                     to: -100
                     duration: 2000
                     easing.type: Easing.InOutQuad
                 }
                 NumberAnimation {
                     to: -200
                     duration: 2000
                     easing.type: Easing.InOutQuad
                 }
             }

             // Emitters, one per particle
             ParticleEmitter3D {
                 system: psystem
                 particle: particleRed
                 shape: ParticleShape3D {
                     type: ParticleShape3D.Sphere
                     fill: true
                 }
                 emitRate: 200
                 lifeSpan: 2000
             }

             ParticleEmitter3D {
                 id: emitter2
                 system: psystem
                 particle: particleGreen
                 shape: ParticleShape3D {
                     type: ParticleShape3D.Sphere
                     fill: true
                 }
                 emitRate: 200
                 lifeSpan: 5000
                 velocity: VectorDirection3D {
                     direction: Qt.vector3d(200, 200, 0)
                     directionVariation: Qt.vector3d(50, 50, 50)
                 }
                 particleRotationVelocityVariation: Qt.vector3d(500.0, 500.0, 500.0)
             }

             ParticleEmitter3D {
                 system: psystem
                 particle: particleWhite
                 shape: ParticleShape3D {
                     type: ParticleShape3D.Sphere
                     fill: true
                 }
                 emitRate: 200
                 lifeSpan: 2000
                 depthBias: 10
             }
         }

         Model {
             id: targetSphere
             source: "#Sphere"
             materials: DefaultMaterial {
                 opacity: 0.2
             }
             y: -200
             SequentialAnimation on x {
                 running: true
                 loops: Animation.Infinite
                 NumberAnimation {
                     to: 200
                     duration: 3500
                     easing.type: Easing.InOutQuad
                 }
                 NumberAnimation {
                     to: 0
                     duration: 3500
                     easing.type: Easing.InOutQuad
                 }
             }
             Attractor3D {
                 system: psystem
                 particles: [particleRed]
                 // Attract into a position
                 positionVariation: Qt.vector3d(10, 10, 10)
                 duration: sliderDuration2.sliderValue
                 durationVariation: sliderDuration2Variation.sliderValue
                 hideAtEnd: checkBoxHide2.checked
             }

             Attractor3D {
                 system: psystem
                 particles: [particleGreen]
                 // Attract into a shape
                 shape: ParticleShape3D {
                     type: ParticleShape3D.Sphere
                     fill: false
                 }
                 duration: sliderDuration1.sliderValue
                 durationVariation: sliderDuration1Variation.sliderValue
                 hideAtEnd: checkBoxHide1.checked
                 useCachedPositions: false

                 SequentialAnimation on scale {
                     running: true
                     loops: Animation.Infinite
                     Vector3dAnimation {
                         to: Qt.vector3d(2, 2, 2)
                         duration: 3500
                         easing.type: Easing.InOutQuad
                     }
                     Vector3dAnimation {
                         to: Qt.vector3d(0.1, 0.1, 0.1)
                         duration: 3500
                         easing.type: Easing.InOutQuad
                     }
                 }
             }
         }

         ParticleSystem3D {
             id: psystem

             // Particles
             ModelParticle3D {
                 id: particleRed
                 delegate: particleComponent
                 maxAmount: 400
                 color: "#ff0000"
                 colorVariation: Qt.vector4d(0, 0, 0, 0.5)
                 alignMode: Particle3D.AlignTowardsTarget
                 alignTargetPosition: targetSphere.position
             }
             ModelParticle3D {
                 id: particleGreen
                 delegate: particleComponent
                 maxAmount: 1000
                 color: "#00ff00"
                 colorVariation: Qt.vector4d(0, 0, 0, 0.5)
             }
             SpriteParticle3D {
                 id: particleWhite
                 sprite: Texture {
                     source: "images/dot.png"
                 }
                 maxAmount: 400
                 color: "#ffffff"
                 colorVariation: Qt.vector4d(0, 0, 0, 0.5)
             }

             // Attractor inside ParticleSystem
             Attractor3D {
                 particles: [particleWhite]
                 // Attract into a position
                 position: Qt.vector3d(-100, -250, 0)
                 positionVariation: Qt.vector3d(100, 10, 10)
                 duration: 1500
             }

             Wander3D {
                 particles: [particleGreen]
                 uniqueAmount: Qt.vector3d(10, 10, 10)
                 uniquePace: Qt.vector3d(1, 1, 1)
                 uniqueAmountVariation: 8
                 uniquePaceVariation: 0.8
                 fadeInDuration: 500
                 fadeOutDuration: 2000
             }
         }
     }

     SettingsView {
         CustomLabel {
             text: "Attractor 1: Duration"
         }
         CustomSlider {
             id: sliderDuration1
             sliderValue: 3000
             fromValue: 1000
             toValue: 5000
         }
         CustomLabel {
             text: "Attractor 1: Duration Variation"
         }
         CustomSlider {
             id: sliderDuration1Variation
             sliderValue: 500
             fromValue: 0
             toValue: 2000
         }
         CustomCheckBox {
             id: checkBoxHide1
             text: "Attractor 1: Hide at end"
             checked: false
         }
         Item {
             width: 1
             height: 40
         }
         CustomLabel {
             text: "Attractor 2: Duration"
         }
         CustomSlider {
             id: sliderDuration2
             sliderValue: 1500
             fromValue: 1000
             toValue: 5000
         }
         CustomLabel {
             text: "Attractor 2: Duration Variation"
         }
         CustomSlider {
             id: sliderDuration2Variation
             sliderValue: 500
             fromValue: 0
             toValue: 2000
         }
         CustomCheckBox {
             id: checkBoxHide2
             text: "Attractor 2: Hide at end"
             checked: false
         }
     }

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