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about PathAnimation



  • PathAnimation just supprt one target

    how to Supports multiple targets?

    Or have other solution?


  • Qt Champions 2018

    Can you tell us a bit more a bout what you are trying to achieve so we can help you more easily?



  • @GrecKo I want to realize the function similar to conveyor belt. I want to put an object on the conveyor belt, and the conveyor belt will transport the object according to its own path


  • Qt Champions 2018

    For this I'd use a PathInterpolator for each object with a common Path.
    You would then animate the progress property of the PathInterpolator and bind x and y of your objects to their PathInterpolator x and y.



  • @GrecKo

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    import QtQuick 2.0

    Rectangle {
    id: window
    width: 320
    height: 480

    Canvas {
        id: canvas
        anchors.fill: parent
        antialiasing: true
    
        onPaint: {
            var context = canvas.getContext("2d")
            context.clearRect(0, 0, width, height)
            context.strokeStyle = "black"
            context.path = motionPath.path
            context.stroke()
        }
    }
    
    //! [0]
    PathInterpolator {
        id: motionPath
    
        path: Path {
            startX: 50; startY: 50
    
            PathCubic {
                x: window.width - 50
                y: window.height - 50
    
                control1X: x; control1Y: 50
                control2X: 50; control2Y: y
            }
    
            onChanged: canvas.requestPaint()
        }
    
        SequentialAnimation on progress {
            running: true
            loops: -1
            PauseAnimation { duration: 1000 }
            NumberAnimation {
                id: progressAnim
                running: false
                from: 0; to: 1
                duration: 2000
                easing.type: Easing.InQuad
            }
        }
    }
    //! [0]
    
    Rectangle {
        id: box
    
        width: 50; height: 50
        border.width: 1
        antialiasing: true
    
        //bind our attributes to follow the path as progress changes
        x: motionPath.x
        y: motionPath.y
        rotation: motionPath.angle
        transform: Translate { x: -box.width/2; y: -box.height/2 }
    
        Text {
            anchors.centerIn: parent
            text: "Box"
        }
    }
    
    Rectangle {
        id: box1
    
        width: 50; height: 50
        border.width: 1
        antialiasing: true
    
        //bind our attributes to follow the path as progress changes
        x: box.x-5
        y: box.y-5
        rotation: box.rotation
        transform: Translate { x: -box.width/2; y: -box.height/2 }
    
        Text {
            anchors.centerIn: parent
            text: "Box1"
        }
    }
    

    }

    How can I make box1 follow the box
    help~


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