Qt Quick 3D - HelloCube Example

HelloCube demonstrates how to render a 3D cube with 2D items in Qt Quick 3D.

Draw 2D Items

We set up the entire scene in the main.qml file.

To be able to use the types in the QtQuick3D module, we must import it:

 import QtQuick3D

We define simple QtQuick Items with an Image and a Text on a Rectangle.

 Image {
     anchors.fill: parent
     source: "qt_logo.png"
 }
 Text {
     anchors.bottom: parent.bottom
     anchors.left: parent.left
     color: "white"
     font.pixelSize: 17
     text: qsTr("The Future is Written with Qt")
 }

This simple rectangle has two animations for flipping vertically.

 transform: Rotation {
     id: rotation
     origin.x: qt_logo.width / 2
     origin.y: qt_logo.height / 2
     axis { x: 1; y: 0; z: 0 }
 }

 PropertyAnimation {
     id: flip1
     target: rotation
     property: "angle"
     duration: 600
     to: 180
     from: 0
 }
 PropertyAnimation {
     id: flip2
     target: rotation
     property: "angle"
     duration: 600
     to: 360
     from: 180
 }

Draw a 3D Cube

Drawing a cube is very simple. After defining a Camera, and a Light, we make a cube with a built-in Model. In this example, we render the previous 2D Rectangle on this cube surface as a diffuse Texture. In our Rectangle, we set layer.enabled to true.

 layer.enabled: true

When enabled, this property makes the 2D item render into a offscreen surface, which we then use as a texture for our cube.

 id: cube
 source: "#Cube"
 materials: DefaultMaterial {
     diffuseMap: Texture {
         sourceItem: qt_logo
     }
 }
 eulerRotation.y: 90

Files:

• hellocube/CMakeLists.txt
• hellocube/hellocube.pro
• hellocube/main.cpp
• hellocube/main.qml
• hellocube/qml.qrc

Images:

• hellocube/qt_logo.png