Warning, /education/gcompris/external/qml-box2d/examples/motorjoint/boat.qml is written in an unsupported language. File is not indexed.

 import QtQuick 2.2
 import Box2D 2.0
 import "../shared"
 
 Rectangle {
     width: 800
     height: 600
 
     World {
         id: physicsWorld
 
         onStepped: {
             joint.step += 0.2;
             if (joint.step > width - 150)
                 joint.step = 0;
             joint.linearOffset = Qt.point(joint.step + 100, Math.sin(joint.step * 6.0));
             joint.angularOffset = Math.sin(joint.step / 8.0) * 10.0;
         }
     }
 
     Rectangle {
         id:waves
         height:30
         y: 260
         anchors {
             left: parent.left
             right: parent.right
         }
         Image {
             id: waveImg
             source: "images/wave.png"
             fillMode: Image.Tile
             anchors.fill: parent
         }
     }
 
     Rectangle {
         id: water
         y: 290
         height: parent.height - 290
         anchors {
             left: parent.left
             right: parent.right
         }
         color: "#74c2e6"
     }
 
     PhysicsItem {
         id: berth
         height: 30
         width: 100
         x: 0
         y: 260
         fixtures: Box {
             width: berth.width
             height: berth.height
         }
         Rectangle {
             anchors.fill: parent
             color: "brown"
         }
     }
 
     PhysicsItem {
         id: boat
         width: 32
         height: 32
         x: 100
         y: 250
         bodyType: Body.Dynamic
         fixtures: Box {
             width: boat.width
             height: boat.height
             friction: 0.6
             density: 2
 
         }
         Image {
             id: boatImg
             source: "images/boat.png"
             anchors.fill: parent
         }
     }
 
     MotorJoint {
         id: joint
         bodyA: berth.body
         bodyB: boat.body
         maxForce: 1000
         maxTorque: 1000
         property double step: 0.0
         angularOffset: 0
     }
 
     Rectangle {
         id: button
         x: 10
         y: 10
         width: 100
         height: 40
         color: "#DEDEDE"
         border.color: "#999"
         radius: 5
         Text {
             id: title
             text: debugDraw.visible ? "Debug view: on" : "Debug view: off"
             anchors.centerIn: parent
             anchors.margins: 5
         }
         MouseArea {
             anchors.fill: parent
             onClicked: debugDraw.visible = !debugDraw.visible;
         }
     }
 
     DebugDraw {
         id: debugDraw
         world: physicsWorld
         visible: false
     }
 }