- Qt 6.5
- Qt Quick 3D
- Qt Quick 3D Examples and Tutorials
- Qt Quick 3D - Particles 3D Testbed Example
- Qt Quick 3D | Commercial or GPLv3

# 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

         property bool fill: checkBoxFill.checked

         anchors.fill: parent

         View3D {
             anchors.fill: parent

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

             PerspectiveCamera {
                 id: camera
                 property real cameraAnim: 0
                 SequentialAnimation on cameraAnim {
                     running: true
                     loops: Animation.Infinite
                     NumberAnimation {
                         to: 1
                         duration: 2000
                         easing.type: Easing.InOutQuad
                     }
                     NumberAnimation {
                         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]
         }
     }