- 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)
             }

             ParticleSystem3D {
                 id: psystem

                 // Particles
                 SpriteParticle3D {
                     id: animated
                     sprite: Texture {
                         source: "images/bear_black.png"
                     }
                     spriteSequence: SpriteSequence3D {
                         frameCount: 13
                         interpolate: false
                         duration: 2000
                         durationVariation: 1500
                     }
                     maxAmount: 4
                     billboard: true
                     blendMode: SpriteParticle3D.Screen
                 }

                 SpriteParticle3D {
                     id: blended
                     sprite: Texture {
                         source: "images/explosion_01_strip13.png"
                     }
                     spriteSequence: SpriteSequence3D {
                         frameCount: 13
                         interpolate: true
                     }
                     maxAmount: 26
                     billboard: true
                     blendMode: SpriteParticle3D.Screen
                 }

                 SpriteParticle3D {
                     id: numberParticle
                     sprite: Texture {
                         source: "images/sprite_09.png"
                     }
                     spriteSequence: SpriteSequence3D {
                         id: numberParticleSequence
                         frameCount: 10
                         frameIndex: sliderFrameIndex.sliderValue
                         animationDirection: sliderAnimationDirection.sliderValue
                         interpolate: checkBoxInterpolate.checked
                         randomStart: checkBoxRandom.checked
                         duration: sliderDuration.sliderValue
                         durationVariation: sliderDurationVariation.sliderValue
                     }
                     maxAmount: 10
                     billboard: true
                     blendMode: SpriteParticle3D.Screen
                 }

                 // Emitters, one per particle
                 ParticleEmitter3D {
                     id: emitter1
                     particle: animated
                     particleScale: 10
                     position: Qt.vector3d(-300, 0, 0)
                     emitRate: 1
                     lifeSpan: 4000

                     shape: ParticleShape3D {
                         fill: true
                     }
                     Node {
                         y: -140
                         x: -100
                         Text {
                             anchors.verticalCenter: parent.verticalCenter
                             text: "Animated + durationVariation"
                             font.pointSize: settings.fontSizeLarge
                             color: "#ffffff"
                         }
                     }
                 }

                 ParticleEmitter3D {
                     id: emitter2
                     particle: blended
                     position: Qt.vector3d(300, -100, 0)
                     particleScale: 20
                     velocity: VectorDirection3D {
                         direction: Qt.vector3d(0, 100, 0)
                         directionVariation: Qt.vector3d(50, 50, 50)
                     }

                     emitRate: 12
                     lifeSpan: 2000
                     lifeSpanVariation: 200
                     Node {
                         y: -40
                         x: -100
                         Text {
                             anchors.verticalCenter: parent.verticalCenter
                             text: "Animated + interpolated"
                             font.pointSize: settings.fontSizeLarge
                             color: "#ffffff"
                         }
                     }
                 }

                 ParticleEmitter3D {
                     id: emitter3
                     particle: numberParticle
                     particleScale: 8
                     position: Qt.vector3d(0, 350, 0)
                     emitRate: 2
                     lifeSpan: 5000
                     velocity: VectorDirection3D {
                         direction: Qt.vector3d(0, -100, 0)
                     }
                     Node {
                         y: 40
                         x: -50
                         Text {
                             anchors.verticalCenter: parent.verticalCenter
                             text: "Controlled"
                             font.pointSize: settings.fontSizeLarge
                             color: "#ffffff"
                         }
                     }
                 }
             }
         }

         SettingsView {
             CustomLabel {
                 property var enumStrings: ["Normal", "Reverse", "Alternate", "AlternateReverse", "SingleFrame"]
                 text: "Animation Direction: " + enumStrings[numberParticleSequence.animationDirection]
             }
             CustomSlider {
                 id: sliderAnimationDirection
                 sliderValue: 0
                 fromValue: 0
                 toValue: 4
                 sliderStepSize: 1
             }
             CustomLabel {
                 text: "Duration"
             }
             CustomSlider {
                 id: sliderDuration
                 sliderValue: -1
                 fromValue: -1
                 toValue: 8000
             }
             CustomLabel {
                 text: "Duration Variation"
             }
             CustomSlider {
                 id: sliderDurationVariation
                 sliderValue: 0
                 fromValue: 0
                 toValue: 2000
             }
             CustomCheckBox {
                 id: checkBoxInterpolate
                 text: "Interpolate"
                 checked: false
             }
             CustomCheckBox {
                 id: checkBoxRandom
                 text: "Random Start"
                 checked: false
             }
             CustomLabel {
                 text: "Frame Index"
                 opacity: checkBoxRandom.checked ? 0.4 : 1.0
             }
             CustomSlider {
                 id: sliderFrameIndex
                 sliderValue: 0
                 fromValue: 0
                 toValue: 9
                 sliderEnabled: !checkBoxRandom.checked
                 sliderStepSize: 1
             }
         }

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