- 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
         property real fontSize: width * 0.012

         View3D {
             id: view
             anchors.fill: parent

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

             PerspectiveCamera {
                 id: camera
                 property real cameraAnim: 0
                 SequentialAnimation {
                     running: true
                     loops: Animation.Infinite
                     NumberAnimation {
                         target: camera
                         property: "cameraAnim"
                         to: 1
                         duration: 4000
                         easing.type: Easing.InOutQuad
                     }
                     NumberAnimation {
                         target: camera
                         property: "cameraAnim"
                         to: 0
                         duration: 4000
                         easing.type: Easing.InOutQuad
                     }
                 }
                 position: Qt.vector3d(500 * Math.sin(cameraAnim * Math.PI * 2), 0, 500 * Math.cos(cameraAnim * Math.PI * 2))
                 eulerRotation: Qt.vector3d(0, cameraAnim * 360, 0)
             }

             Timer {
                 running: true
                 repeat: true
                 interval: 4000
                 onTriggered: {
                     if (shape1.delegate === cube) {
                         shape1.delegate = suzanne;
                         shape2.delegate = suzanne;
                     } else if (shape1.delegate === suzanne) {
                         shape1.delegate = cube;
                         shape2.delegate = cube;
                     }
                 }
             }

             ParticleSystem3D {
                 id: psystem

                 SpriteParticle3D {
                     id: particleFire
                     sprite: Texture {
                         source: "images/sphere.png"
                     }
                     colorTable: Texture {
                         source: "images/colorTable.png"
                     }
                     maxAmount: 6000
                     color: "#ffffff"
                     billboard: true
                     blendMode: SpriteParticle3D.Screen
                 }

                 Component {
                     id: suzanne
                     Model {
                         source: "meshes/suzanne.mesh"
                         scale: Qt.vector3d(100, 100, 100)
                         materials: DefaultMaterial { diffuseColor: "red" }
                     }
                 }

                 Component {
                     id: cube
                     Model {
                         source: "#Cube"
                         scale: Qt.vector3d(2, 2, 2)
                         materials: DefaultMaterial { diffuseColor: "red" }
                     }
                 }

                 ParticleEmitter3D {
                     particle: particleFire
                     position: Qt.vector3d(-150, 0, 0)
                     particleScale: 1
                     particleScaleVariation: 1
                     velocity: VectorDirection3D {
                         direction: Qt.vector3d(0, 60, 0)
                         directionVariation: Qt.vector3d(6, 6, 6)
                     }
                     emitRate: 3000
                     lifeSpan: 1000
                     shape: ParticleModelShape3D {
                         id: shape1
                         delegate: suzanne
                     }
                     Node {
                         x: -30
                         y: 150
                         Text {
                             anchors.verticalCenter: parent.verticalCenter
                             text: "Filled"
                             font.pointSize: mainWindow.fontSize
                             color: "#ffffff"
                         }
                     }
                 }

                 ParticleEmitter3D {
                     particle: particleFire
                     position: Qt.vector3d(150, 0, 0)
                     particleScale: 1
                     particleScaleVariation: 1
                     velocity: VectorDirection3D {
                         direction: Qt.vector3d(0, 60, 0)
                         directionVariation: Qt.vector3d(6, 6, 6)
                     }
                     emitRate: 3000
                     lifeSpan: 1000
                     shape: ParticleModelShape3D {
                         id: shape2
                         delegate: suzanne
                         fill: false
                     }
                     Node {
                         x: -30
                         y: 150
                         Text {
                             anchors.verticalCenter: parent.verticalCenter
                             text: "Surface"
                             font.pointSize: mainWindow.fontSize
                             color: "#ffffff"
                         }
                     }
                 }
             }
         }

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