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]
     }
 }