- 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)
             }

             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: settings.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: settings.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: settings.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: settings.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]
         }
     }