qtdeclarative/examples/particles/emitters/content/trailemitter.qml

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import QtQuick 2.0
import QtQuick.Particles 2.0

Rectangle {
    id: root
    width: 360
    height: 540
    color: "black"

    ParticleSystem {
        id: particles
        anchors.fill: parent

        ImageParticle {
            id: smoke
            system: particles
            anchors.fill: parent
            groups: ["A", "B"]
            source: "../../images/particle.png"
            colorVariation: 0
            color: "#00111111"
        }
        ImageParticle {
            id: flame
            anchors.fill: parent
            system: particles
            groups: ["C", "D"]
            source: "../../images/particle.png"
            colorVariation: 0.1
            color: "#00ff400f"
        }

        Emitter {
            id: fire
            system: particles
            group: "C"

            y: parent.height
            width: parent.width

            emitRate: 350
            lifeSpan: 3500

            acceleration: PointDirection { y: -17; xVariation: 3 }
            velocity: PointDirection {xVariation: 3}

            size: 24
            sizeVariation: 8
            endSize: 4
        }

        TrailEmitter {
            id: fireSmoke
            group: "B"
            system: particles
            follow: "C"
            width: root.width
            height: root.height - 68

            emitRatePerParticle: 1
            lifeSpan: 2000

            velocity: PointDirection {y:-17*6; yVariation: -17; xVariation: 3}
            acceleration: PointDirection {xVariation: 3}

            size: 36
            sizeVariation: 8
            endSize: 16
        }

        TrailEmitter {
            id: fireballFlame
            anchors.fill: parent
            system: particles
            group: "D"
            follow: "E"

            emitRatePerParticle: 120
            lifeSpan: 180
            emitWidth: TrailEmitter.ParticleSize
            emitHeight: TrailEmitter.ParticleSize
            emitShape: EllipseShape{}

            size: 16
            sizeVariation: 4
            endSize: 4
        }

        TrailEmitter {
            id: fireballSmoke
            anchors.fill: parent
            system: particles
            group: "A"
            follow: "E"

            emitRatePerParticle: 128
            lifeSpan: 2400
            emitWidth: TrailEmitter.ParticleSize
            emitHeight: TrailEmitter.ParticleSize
            emitShape: EllipseShape{}

            velocity: PointDirection {yVariation: 16; xVariation: 16}
            acceleration: PointDirection {y: -16}

            size: 24
            sizeVariation: 8
            endSize: 8
        }

        Emitter {
            id: balls
            system: particles
            group: "E"

            y: parent.height
            width: parent.width

            emitRate: 2
            lifeSpan: 7000

            velocity: PointDirection {y:-17*4*2; xVariation: 6*6}
            acceleration: PointDirection {y: 17*2; xVariation: 6*6}

            size: 8
            sizeVariation: 4
        }

        Turbulence { //A bit of turbulence makes the smoke look better
            anchors.fill: parent
            groups: ["A","B"]
            strength: 32
            system: particles
        }
    }
}