- Qt 6.5
- Qt Quick 3D
- 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)

                 SequentialAnimation {
                     running: true
                     loops: Animation.Infinite
                     NumberAnimation {
                         target: camera
                         property: "eulerRotation.x"
                         to: -90
                         duration: 20000
                         easing.type: Easing.Linear
                     }
                     NumberAnimation {
                         target: camera
                         property: "eulerRotation.x"
                         to: 0
                         duration: 2000
                         easing.type: Easing.Linear
                     }
                 }

                 SequentialAnimation {
                     running: true
                     loops: Animation.Infinite
                     NumberAnimation {
                         target: camera
                         property: "position.y"
                         to: 1400
                         duration: 20000
                         easing.type: Easing.Linear
                     }
                     NumberAnimation {
                         target: camera
                         property: "position.y"
                         to: 0
                         duration: 2000
                         easing.type: Easing.Linear
                     }
                 }

                 SequentialAnimation {
                     running: true
                     loops: Animation.Infinite
                     NumberAnimation {
                         target: camera
                         property: "position.z"
                         to: 0
                         duration: 20000
                         easing.type: Easing.Linear
                     }
                     NumberAnimation {
                         target: camera
                         property: "position.z"
                         to: 600
                         duration: 2000
                         easing.type: Easing.Linear
                     }
                 }
             }

             PointLight {
                 position: Qt.vector3d(0, 400, 100)
                 brightness: 10
                 ambientColor: Qt.rgba(0.3, 0.3, 0.3, 1.0)
             }

             // Models shared between particles
             Component {
                 id: particleComponent
                 Model {
                     source: "#Cone"
                     scale: Qt.vector3d(0.1, 0.1, 0.1)
                     materials: DefaultMaterial {
                     }
                 }
             }

             ParticleSystem3D {
                 id: psystem

                 // Particles
                 ModelParticle3D {
                     id: particleVelocity
                     delegate: particleComponent
                     maxAmount: 250
                     color: "#ff0000"
                     alignMode: Particle3D.AlignTowardsStartVelocity
                 }

                 ModelParticle3D {
                     id: particleCamera
                     delegate: particleComponent
                     maxAmount: 250
                     color: "#00ff00"
                     alignMode: Particle3D.AlignTowardsTarget
                     alignTargetPosition: camera.position
                 }

                 ModelParticle3D {
                     id: particleNoAlign
                     delegate: particleComponent
                     maxAmount: 250
                     color: "#0000ff"
                 }

                 SpriteParticle3D {
                     id: particleBillboard
                     sprite: Texture {
                         source: "images/snowflake.png"
                     }
                     maxAmount: 250
                     color: "#ffffff"
                     billboard: true
                 }

                 SpriteParticle3D {
                     id: particleNoBillboard
                     sprite: Texture {
                         source: "images/snowflake.png"
                     }
                     maxAmount: 250
                     color: "#aaaaff"
                 }

                 // Emitters, one per particle
                 ParticleEmitter3D {
                     particle: particleVelocity
                     position: Qt.vector3d(400, 50, 0)
                     particleScale: 2
                     particleRotation: Qt.vector3d(90, 0, 0)
                     velocity: VectorDirection3D {
                         direction: Qt.vector3d(0, 100, 0)
                         directionVariation: Qt.vector3d(30, 30, 30)
                     }
                     emitRate: 10
                     lifeSpan: 4000
                     Node {
                         x: 20
                         Text {
                             anchors.verticalCenter: parent.verticalCenter
                             text: "StartVelocity"
                             font.pointSize: settings.fontSizeLarge
                             color: "#ffffff"
                         }
                     }
                 }

                 ParticleEmitter3D {
                     particle: particleCamera
                     position: Qt.vector3d(200, 50, 0)
                     particleScale: 2
                     particleRotation: Qt.vector3d(90, 0, 0)
                     velocity: VectorDirection3D {
                         direction: Qt.vector3d(0, 100, 0)
                         directionVariation: Qt.vector3d(30, 30, 30)
                     }
                     emitRate: 10
                     lifeSpan: 4000
                     Node {
                         x: 20
                         Text {
                             anchors.verticalCenter: parent.verticalCenter
                             text: "Camera"
                             font.pointSize: settings.fontSizeLarge
                             color: "#ffffff"
                         }
                     }
                 }

                 ParticleEmitter3D {
                     particle: particleNoAlign
                     position: Qt.vector3d(0, 50, 0)
                     particleScale: 2
                     particleRotation: Qt.vector3d(90, 0, 0)
                     velocity: VectorDirection3D {
                         direction: Qt.vector3d(0, 100, 0)
                         directionVariation: Qt.vector3d(30, 30, 30)
                     }
                     emitRate: 10
                     lifeSpan: 4000
                     Node {
                         x: 20
                         Text {
                             anchors.verticalCenter: parent.verticalCenter
                             text: "NoAlign"
                             font.pointSize: settings.fontSizeLarge
                             color: "#ffffff"
                         }
                     }
                 }

                 ParticleEmitter3D {
                     particle: particleBillboard
                     position: Qt.vector3d(-200, 50, 0)
                     particleScale: 8
                     velocity: VectorDirection3D {
                         direction: Qt.vector3d(0, 100, 0)
                         directionVariation: Qt.vector3d(30, 30, 30)
                     }
                     emitRate: 10
                     lifeSpan: 4000
                     Node {
                         x: 20
                         Text {
                             anchors.verticalCenter: parent.verticalCenter
                             text: "Billboard"
                             font.pointSize: settings.fontSizeLarge
                             color: "#ffffff"
                         }
                     }
                 }

                 ParticleEmitter3D {
                     particle: particleNoBillboard
                     position: Qt.vector3d(-400, 50, 0)
                     particleScale: 8
                     velocity: VectorDirection3D {
                         direction: Qt.vector3d(0, 100, 0)
                         directionVariation: Qt.vector3d(30, 30, 30)
                     }
                     emitRate: 10
                     lifeSpan: 4000
                     Node {
                         x: 20
                         Text {
                             anchors.verticalCenter: parent.verticalCenter
                             text: "NoBillboard"
                             font.pointSize: settings.fontSizeLarge
                             color: "#ffffff"
                         }
                     }
                 }
             }
         }

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