- Qt 6.4
- 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
     import QtQuick.Controls

     Item {
         id: mainView

         readonly property real listItemWidth: 180
         readonly property real listItemHeight: 40
         // Enable this when only want to list the demos
         // Tweak the demos list as needed
         readonly property bool showOnlyDemos: false

         anchors.fill: parent

         ListModel {
             id: demosModel
             ListElement {
                 name: "Snowing"
                 file: "Snowing.qml"
             }
             ListElement {
                 name: "Line Particles"
                 file: "LineParticles.qml"
             }
             ListElement {
                 name: "HeartTrail"
                 file: "HeartTrail.qml"
             }
             ListElement {
                 name: "Giant Ocean Spider"
                 file: "OceanSpider.qml"
             }
             ListElement {
                 name: "Qt Cube Burst"
                 file: "QtLogoAnimation.qml"
             }
             ListElement {
                 name: "Fire And Smoke"
                 file: "Fire.qml"
             }
             ListElement {
                 name: "Speedometer"
                 file: "Speedometer.qml"
             }
             ListElement {
                 name: "Sorting"
                 file: "Sorting.qml"
             }
             ListElement {
                 name: "Model-Blend Particles"
                 file: "ModelBlendParticles.qml"
             }
             ListElement {
                 name: "Lights"
                 file: "Lights.qml"
             }
             ListElement {
                 name: "Dynamic Bursts"
                 file: "DynamicBursts.qml"
             }
         }

         ListModel {
             id: testsModel
             ListElement {
                 name: "Colorful Particles"
                 file: "ColorfulParticles.qml"
             }
             ListElement {
                 name: "Emitter Shapes"
                 file: "EmitterShapes.qml"
             }
             ListElement {
                 name: "Emitter Custom Shapes"
                 file: "EmitterCustomShapes.qml"
             }
             ListElement {
                 name: "Attractor Shapes"
                 file: "AttractorShapes.qml"
             }
             ListElement {
                 name: "Fading In/Out"
                 file: "FadingInOut.qml"
             }
             ListElement {
                 name: "Emit And Burst"
                 file: "EmitAndBurst.qml"
             }
             ListElement {
                 name: "ParticleSystem"
                 file: "SystemPlayPause.qml"
             }
             ListElement {
                 name: "Aligned Particles"
                 file: "AlignedParticles.qml"
             }
             ListElement {
                 name: "TrailEmitter Burst"
                 file: "TrailEmitterBurst.qml"
             }
             ListElement {
                 name: "Animated Sprite"
                 file: "AnimatedSprite.qml"
             }
             ListElement {
                 name: "Model Shape"
                 file: "ModelShape.qml"
             }
         }

         View3D {
             anchors.fill: parent

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

             PerspectiveCamera {
                 position: Qt.vector3d(0, 0, 600)
                 clipFar: 2000
             }

             PointLight {
                 position: Qt.vector3d(200, 200, 400)
                 brightness: 50
                 ambientColor: Qt.rgba(0.5, 0.3, 0.1, 1.0)
                 SequentialAnimation on brightness {
                     loops: Animation.Infinite
                     NumberAnimation {
                         to: 400
                         duration: 2000
                         easing.type: Easing.OutElastic
                     }
                     NumberAnimation {
                         to: 50
                         duration: 6000
                         easing.type: Easing.InOutQuad
                     }
                 }
             }

             // Qt Cube model
             Model {
                 source: "#Cube"
                 position: Qt.vector3d(-250, 150, 100)
                 scale: Qt.vector3d(1.0, 1.0, 1.0)
                 NumberAnimation on eulerRotation.y {
                     loops: Animation.Infinite
                     from: 0
                     to: 360
                     duration: 10000
                 }
                 NumberAnimation on eulerRotation.x {
                     loops: Animation.Infinite
                     from: 0
                     to: 360
                     duration: 6000
                 }
                 materials: PrincipledMaterial {
                     baseColorMap: Texture {
                         source: "images/qt_logo2.png"
                     }
                     normalMap: Texture {
                         source: "images/qt_logo2_n.png"
                     }
                 }
             }

             ParticleSystem3D {
                 id: psystem
                 startTime: 10000
                 SpriteParticle3D {
                     id: spriteParticle
                     sprite: Texture {
                         source: "images/dot.png"
                     }
                     maxAmount: 200
                     color: "#80ff7000"
                     colorVariation: Qt.vector4d(0.6, 0.2, 0.0, 0.4)
                     unifiedColorVariation: true
                     fadeInDuration: 1000
                     fadeOutDuration: 3000
                 }
                 ParticleEmitter3D {
                     particle: spriteParticle
                     emitRate: 20
                     lifeSpan: 10000
                     scale: Qt.vector3d(8, 8, 0)
                     shape: ParticleShape3D {
                         type: ParticleShape3D.Cube
                     }
                     particleScale: 2.4
                     particleScaleVariation: 1.8
                     particleEndScale: 0.2
                     velocity: TargetDirection3D {
                         magnitudeVariation: magnitude
                         positionVariation: Qt.vector3d(180, 180, 180)
                         SequentialAnimation on magnitude {
                             loops: Animation.Infinite
                             NumberAnimation {
                                 to: 1.0
                                 duration: 3000
                                 easing.type: Easing.InOutQuad
                             }
                             NumberAnimation {
                                 to: 0.1
                                 duration: 5000
                                 easing.type: Easing.InOutQuad
                             }
                         }
                     }
                 }
             }
         }

         Component {
             id: listComponent
             Button {
                 width: mainView.listItemWidth
                 height: mainView.listItemHeight
                 background: Rectangle {
                     id: buttonBackground
                     border.width: 0.5
                     border.color: "#d0808080"
                     color: "#d0404040"
                     opacity: hovered ? 1.0 : 0.5
                 }
                 contentItem: Text {
                     anchors.centerIn: parent
                     color: "#f0f0f0"
                     font.pointSize: settings.fontSizeSmall
                     text: name
                 }

                 onClicked: {
                     loader.source = file
                 }
             }
         }

         Text {
             id: topLabel
             anchors.horizontalCenter: parent.horizontalCenter
             anchors.top: parent.top
             anchors.topMargin: 20
             text: qsTr("Qt Quick 3D - Particles3D")
             color: "#f0f0f0"
             font.pointSize: settings.fontSizeLarge
         }

         Row {
             anchors.horizontalCenter: parent.horizontalCenter
             anchors.top: topLabel.bottom
             anchors.topMargin: 20
             spacing: 20
             ListView {
                 id: demosListView
                 width: mainView.listItemWidth
                 height: count * mainView.listItemHeight
                 model: demosModel
                 delegate: listComponent
             }
             ListView {
                 id: examplesListView
                 visible: !showOnlyDemos
                 width: mainView.listItemWidth
                 height: count * mainView.listItemHeight
                 model: testsModel
                 delegate: listComponent
             }
         }
     }