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

     View3D {
         anchors.fill: parent

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

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

         Component {
             id: particleComponent2
             Model {
                 source: "#Cylinder"
                 scale: Qt.vector3d(0.1, 0.2, 0.1)
                 materials: PrincipledMaterial {
                     metalness: 0.5
                     roughness: 0
                     specularAmount: 1.0
                 }
             }
         }

         ParticleSystem3D {
             id: psystem

             SequentialAnimation on eulerRotation.y {
                 running: true
                 loops: Animation.Infinite
                 NumberAnimation {
                     to: 180
                     duration: 5000
                     easing.type: Easing.InOutCirc
                 }
                 NumberAnimation {
                     to: 0
                     duration: 5000
                     easing.type: Easing.InOutCirc
                 }
             }

             property vector4d cVar: Qt.vector4d(sliderRedVariation.sliderValue,
                                                 sliderGreenVariation.sliderValue,
                                                 sliderBlueVariation.sliderValue,
                                                 sliderAlphaVariation.sliderValue)
             // Particles
             ModelParticle3D {
                 id: particleRed
                 delegate: particleComponent
                 maxAmount: 250
                 color: "#ff0000"
                 colorVariation: psystem.cVar
                 unifiedColorVariation: checkBoxUnified.checked
             }
             ModelParticle3D {
                 id: particleGreen
                 delegate: particleComponent
                 maxAmount: 250
                 color: "#00ff00"
                 colorVariation: psystem.cVar
                 unifiedColorVariation: checkBoxUnified.checked
             }
             ModelParticle3D {
                 id: particleBlue
                 delegate: particleComponent
                 maxAmount: 250
                 color: "#0000ff"
                 colorVariation: psystem.cVar
                 unifiedColorVariation: checkBoxUnified.checked
             }
             ModelParticle3D {
                 id: particleWhite
                 delegate: particleComponent2
                 maxAmount: 250
                 color: "#ffffff"
                 colorVariation: psystem.cVar
                 unifiedColorVariation: checkBoxUnified.checked
             }

             // Emitters, one per particle
             ParticleEmitter3D {
                 particle: particleRed
                 position: Qt.vector3d(400, 50, 0)
                 particleScaleVariation: 0.8
                 particleRotationVariation: Qt.vector3d(180, 180, 180)
                 particleRotationVelocityVariation: Qt.vector3d(200, 200, 200);
                 velocity: VectorDirection3D {
                     direction: Qt.vector3d(-350, 150, 0)
                     directionVariation: Qt.vector3d(30, 30, 30)
                 }
                 emitRate: 100
                 lifeSpan: 2500
                 Node {
                     x: 20
                     Text {
                         anchors.verticalCenter: parent.verticalCenter
                         text: "RED"
                         font.pointSize: AppSettings.fontSizeLarge
                         color: "#ffffff"
                     }
                 }
             }
             ParticleEmitter3D {
                 particle: particleGreen
                 position: Qt.vector3d(400, 0, 0)
                 particleScaleVariation: 0.8
                 particleRotationVariation: Qt.vector3d(180, 180, 180)
                 particleRotationVelocityVariation: Qt.vector3d(200, 200, 200);
                 velocity: VectorDirection3D {
                     direction: Qt.vector3d(-350, 150, 0)
                     directionVariation: Qt.vector3d(30, 30, 30)
                 }
                 emitRate: 100
                 lifeSpan: 2500
                 Node {
                     x: 20
                     Text {
                         anchors.verticalCenter: parent.verticalCenter
                         text: "GREEN"
                         font.pointSize: AppSettings.fontSizeLarge
                         color: "#ffffff"
                     }
                 }
             }
             ParticleEmitter3D {
                 particle: particleBlue
                 position: Qt.vector3d(400, -50, 0)
                 particleScaleVariation: 0.8
                 particleRotationVariation: Qt.vector3d(180, 180, 180)
                 particleRotationVelocityVariation: Qt.vector3d(200, 200, 200);
                 velocity: VectorDirection3D {
                     direction: Qt.vector3d(-350, 150, 0)
                     directionVariation: Qt.vector3d(30, 30, 30)
                 }
                 emitRate: 100
                 lifeSpan: 2500
                 Node {
                     x: 20
                     Text {
                         anchors.verticalCenter: parent.verticalCenter
                         text: "BLUE"
                         font.pointSize: AppSettings.fontSizeLarge
                         color: "#ffffff"
                     }
                 }
             }
             ParticleEmitter3D {
                 particle: particleWhite
                 position: Qt.vector3d(400, -100, 0)
                 particleScaleVariation: 0.8
                 particleRotationVariation: Qt.vector3d(180, 180, 180)
                 particleRotationVelocityVariation: Qt.vector3d(200, 200, 200);
                 velocity: VectorDirection3D {
                     direction: Qt.vector3d(-350, 150, 0)
                     directionVariation: Qt.vector3d(30, 30, 30)
                 }
                 emitRate: 100
                 lifeSpan: 2500
                 Node {
                     x: 20
                     Text {
                         anchors.verticalCenter: parent.verticalCenter
                         text: "WHITE"
                         font.pointSize: AppSettings.fontSizeLarge
                         color: "#ffffff"
                     }
                 }
             }

             Gravity3D {
                 // Enable to affect only some of the particles
                 //particles: [particleRed, particleBlue, particleGreen]
                 direction: Qt.vector3d(0, 1, 0)
                 magnitude: -100
             }
         }
     }

     SettingsView {
         CustomCheckBox {
             id: checkBoxUnified
             text: "Unified Variation"
             checked: false
         }
         CustomLabel {
             text: "Red Variation"
         }
         CustomSlider {
             id: sliderRedVariation
             sliderValue: 0
             fromValue: 0.0
             toValue: 1.0
         }
         CustomLabel {
             text: "Green Variation"
         }
         CustomSlider {
             id: sliderGreenVariation
             sliderValue: 0
             fromValue: 0.0
             toValue: 1.0
         }
         CustomLabel {
             text: "Blue Variation"
         }
         CustomSlider {
             id: sliderBlueVariation
             sliderValue: 0
             fromValue: 0.0
             toValue: 1.0
         }
         CustomLabel {
             text: "Alpha Variation"
         }
         CustomSlider {
             id: sliderAlphaVariation
             sliderValue: 0
             fromValue: 0.0
             toValue: 1.0
         }
     }

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