- Qt 6.7
- 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) 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 {
             id: view3D
             anchors.fill: parent

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

             PerspectiveCamera {
                 id: camera
                 z: 600
                 y: -20
             }

             PointLight {
                 position: Qt.vector3d(0, 400, 300)
                 brightness: 40
                 ambientColor: Qt.rgba(0.1, 0.1, 0.1, 1.0)
             }

             // Model shared between particles
             Component {
                 id: particleComponent
                 Model {
                     source: "#Cube"
                     scale: Qt.vector3d(0.2, 0.2, 0.2)
                     materials: DefaultMaterial {
                     }
                 }
             }

             Node {
                 SequentialAnimation on eulerRotation.x {
                     loops: Animation.Infinite
                     NumberAnimation {
                         to: -80
                         duration: 2500
                         easing.type: Easing.InOutQuad
                     }
                     NumberAnimation {
                         to: 0
                         duration: 2500
                         easing.type: Easing.InOutQuad
                     }
                 }
                 ParticleSystem3D {
                     id: psystem

                     // Particles
                     ModelParticle3D {
                         id: particleWhite
                         delegate: particleComponent
                         maxAmount: 1200
                         color: "#ffffff"
                     }

                     ParticleEmitter3D {
                         id: emitter1
                         particle: particleWhite
                         position: Qt.vector3d(-300, -200, 0)
                         particleScale: 0.2
                         particleEndScale: 1.0
                         particleRotationVariation: Qt.vector3d(180, 180, 180)
                         velocity: VectorDirection3D {
                             direction: Qt.vector3d(0, 200, 0)
                             directionVariation: Qt.vector3d(20, 0, 20)
                         }
                         lifeSpan: 3000
                         emitRate: 100
                         Timer {
                             running: true
                             repeat: true
                             interval: 500
                             onTriggered: {
                                 emitter1.enabled = !emitter1.enabled
                             }
                         }
                     }
                     Node {
                         position: emitter1.position
                         Text {
                             anchors.horizontalCenter: parent.horizontalCenter
                             horizontalAlignment: Text.AlignHCenter
                             text: "Enabling\nEmitter"
                             font.pointSize: AppSettings.fontSizeLarge
                             color: "#ffffff"
                         }
                     }

                     ParticleEmitter3D {
                         id: emitter2
                         particle: particleWhite
                         position: Qt.vector3d(-100, -200, 0)
                         particleScale: 0.2
                         particleEndScale: 1.0
                         particleRotationVariation: Qt.vector3d(180, 180, 180)
                         velocity: VectorDirection3D {
                             direction: Qt.vector3d(0, 200, 0)
                             directionVariation: Qt.vector3d(20, 0, 20)
                         }
                         lifeSpan: 3000
                         emitRate: 0.1
                         SequentialAnimation {
                             running: true
                             loops: Animation.Infinite
                             NumberAnimation {
                                 target: emitter2
                                 property: "emitRate"
                                 duration: 2000
                                 easing.type: Easing.InOutQuad
                                 to: 100
                             }
                             NumberAnimation {
                                 target: emitter2
                                 property: "emitRate"
                                 duration: 2000
                                 easing.type: Easing.InOutQuad
                                 to: 0.1
                             }
                         }
                     }
                     Node {
                         position: emitter2.position
                         Text {
                             anchors.horizontalCenter: parent.horizontalCenter
                             horizontalAlignment: Text.AlignHCenter
                             text: "Animated\nemitRate"
                             font.pointSize: AppSettings.fontSizeLarge
                             color: "#ffffff"
                         }
                     }

                     ParticleEmitter3D {
                         id: emitter3
                         particle: particleWhite
                         position: Qt.vector3d(100, -200, 0)
                         particleScale: 0.2
                         particleEndScale: 1.0
                         particleRotationVariation: Qt.vector3d(180, 180, 180)
                         velocity: VectorDirection3D {
                             direction: Qt.vector3d(0, 200, 0)
                             directionVariation: Qt.vector3d(20, 0, 20)
                         }
                         lifeSpan: 3000
                         Timer {
                             running: true
                             repeat: true
                             interval: 500
                             onTriggered: {
                                 emitter3.burst(50);
                             }
                         }
                     }
                     Node {
                         position: emitter3.position
                         Text {
                             anchors.horizontalCenter: parent.horizontalCenter
                             horizontalAlignment: Text.AlignHCenter
                             text: "Burst"
                             font.pointSize: AppSettings.fontSizeLarge
                             color: "#ffffff"
                         }
                     }

                     ParticleEmitter3D {
                         id: emitter4
                         particle: particleWhite
                         position: Qt.vector3d(300, -200, 0)
                         particleScale: 0.2
                         particleEndScale: 1.0
                         particleRotationVariation: Qt.vector3d(180, 180, 180)
                         velocity: VectorDirection3D {
                             direction: Qt.vector3d(0, 200, 0)
                             directionVariation: Qt.vector3d(20, 0, 20)
                         }
                         lifeSpan: 3000
                         emitRate: 10
                         Timer {
                             running: true
                             repeat: true
                             interval: 500
                             onTriggered: {
                                 emitter4.burst(50);
                             }
                         }
                     }
                     Node {
                         position: emitter4.position
                         Text {
                             anchors.horizontalCenter: parent.horizontalCenter
                             horizontalAlignment: Text.AlignHCenter
                             text: "Emit and\nBurst"
                             font.pointSize: AppSettings.fontSizeLarge
                             color: "#ffffff"
                         }
                     }
                 }
             }
         }

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