- 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

         anchors.fill: parent

         View3D {
             anchors.fill: parent

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

             PerspectiveCamera {
                 id: camera
                 position: Qt.vector3d(0, 100, 600)
             }

             PointLight {
                 position: Qt.vector3d(0, 400, 100)
                 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(0.4, 0.4, 0.4)
                     materials: DefaultMaterial {
                     }
                 }
             }

             ParticleSystem3D {
                 id: psystem

                 // Particles
                 ModelParticle3D {
                     id: particleNone
                     delegate: particleComponent
                     maxAmount: 40
                     color: "#ffffff"
                     fadeInEffect: ModelParticle3D.FadeNone
                     fadeOutEffect: ModelParticle3D.FadeNone
                     hasTransparency: false
                 }
                 ModelParticle3D {
                     id: particleOpacity
                     delegate: particleComponent
                     maxAmount: 40
                     color: "#ffffff"
                     fadeInEffect: ModelParticle3D.FadeOpacity
                     fadeOutEffect: ModelParticle3D.FadeOpacity
                     fadeInDuration: sliderFadeInDuration.sliderValue
                     fadeOutDuration: sliderFadeOutDuration.sliderValue
                 }
                 ModelParticle3D {
                     id: particleScale
                     delegate: particleComponent
                     maxAmount: 40
                     color: "#ffffff"
                     fadeInEffect: ModelParticle3D.FadeScale
                     fadeOutEffect: ModelParticle3D.FadeScale
                     fadeInDuration: sliderFadeInDuration.sliderValue
                     fadeOutDuration: sliderFadeOutDuration.sliderValue
                 }
                 ModelParticle3D {
                     id: particleScaleOpacity
                     delegate: particleComponent
                     maxAmount: 40
                     color: "#ffffff"
                     fadeInEffect: ModelParticle3D.FadeScale
                     fadeOutEffect: ModelParticle3D.FadeOpacity
                     fadeInDuration: sliderFadeInDuration.sliderValue
                     fadeOutDuration: sliderFadeOutDuration.sliderValue
                 }

                 // Emitters, one per particle
                 ParticleEmitter3D {
                     particle: particleNone
                     position: Qt.vector3d(300, 200, 0)
                     particleScaleVariation: 0.5
                     particleRotationVariation: Qt.vector3d(180, 180, 180)
                     particleRotationVelocityVariation: Qt.vector3d(200, 200, 200);
                     velocity: VectorDirection3D {
                         direction: Qt.vector3d(-200, 0, 0)
                     }
                     emitRate: 10
                     lifeSpan: 4000
                     Node {
                         x: 80
                         Text {
                             anchors.verticalCenter: parent.verticalCenter
                             text: "NONE"
                             font.pointSize: settings.fontSizeLarge
                             color: "#ffffff"
                         }
                     }
                 }
                 ParticleEmitter3D {
                     particle: particleOpacity
                     position: Qt.vector3d(300, 100, 0)
                     particleScaleVariation: 0.5
                     particleRotationVariation: Qt.vector3d(180, 180, 180)
                     particleRotationVelocityVariation: Qt.vector3d(200, 200, 200);
                     velocity: VectorDirection3D {
                         direction: Qt.vector3d(-200, 0, 0)
                     }
                     emitRate: 10
                     lifeSpan: 4000
                     Node {
                         x: 80
                         Text {
                             anchors.verticalCenter: parent.verticalCenter
                             text: "OPACITY"
                             font.pointSize: settings.fontSizeLarge
                             color: "#ffffff"
                         }
                     }
                 }
                 ParticleEmitter3D {
                     particle: particleScale
                     position: Qt.vector3d(300, 0, 0)
                     particleScaleVariation: 0.5
                     particleRotationVariation: Qt.vector3d(180, 180, 180)
                     particleRotationVelocityVariation: Qt.vector3d(200, 200, 200);
                     velocity: VectorDirection3D {
                         direction: Qt.vector3d(-200, 0, 0)
                     }
                     emitRate: 10
                     lifeSpan: 4000
                     Node {
                         x: 80
                         Text {
                             anchors.verticalCenter: parent.verticalCenter
                             text: "SCALE"
                             font.pointSize: settings.fontSizeLarge
                             color: "#ffffff"
                         }
                     }
                 }
                 ParticleEmitter3D {
                     particle: particleScaleOpacity
                     position: Qt.vector3d(300, -100, 0)
                     particleScaleVariation: 0.5
                     particleRotationVariation: Qt.vector3d(180, 180, 180)
                     particleRotationVelocityVariation: Qt.vector3d(200, 200, 200);
                     velocity: VectorDirection3D {
                         direction: Qt.vector3d(-200, 0, 0)
                     }
                     emitRate: 10
                     lifeSpan: 4000
                     Node {
                         x: 80
                         Text {
                             anchors.verticalCenter: parent.verticalCenter
                             text: "SCALE -> OPACITY"
                             font.pointSize: settings.fontSizeLarge
                             color: "#ffffff"
                         }
                     }
                 }
             }
         }

         SettingsView {
             CustomLabel {
                 text: "Fade In Duration (ms)"
             }
             CustomSlider {
                 id: sliderFadeInDuration
                 sliderValue: 1500
                 fromValue: 0
                 toValue: 4000
             }
             CustomLabel {
                 text: "Fade Out Duration (ms)"
             }
             CustomSlider {
                 id: sliderFadeOutDuration
                 sliderValue: 1500
                 fromValue: 0
                 toValue: 4000
             }
         }

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