Qt Quick 3D - View3D Example | Qt Quick 3D (original) (raw)

Demonstrates the use of View3D to show a scene from multiple cameras.

This example demonstrates using four separate View3Ds with different cameras in an application.

Defining the Cameras

First we define the cameras. We're going to define several different cameras, even though we will only add 4 views. We're doing this because we want to be able to switch the camera in one of the views.

The cameras have to be defined inside the root Node. This is how the cameras are defined:

Node { id: standAloneScene ... // The predefined cameras. They have to be part of the scene, i.e. inside the root node. // Animated perspective camera Node { PerspectiveCamera { id: cameraPerspectiveOne z: 600 }

PropertyAnimation on eulerRotation.x {
    loops: Animation.Infinite
    duration: 5000
    to: -360
    from: 0
}

}

// Stationary perspective camera PerspectiveCamera { id: cameraPerspectiveTwo z: 600 } ... // Stationary orthographic camera viewing from left OrthographicCamera { id: cameraOrthographicLeft x: -600 eulerRotation.y: -90 } }

Adding the Views

After defining the cameras we can add the views. We divide the screen to four parts, and add views one-by-one like this:

// The views Rectangle { id: topLeft anchors.top: parent.top anchors.left: parent.left width: parent.width * 0.5 height: parent.height * 0.5 color: "#848895" border.color: "black"

[View3D](qml-qtquick3d-view3d.html) {
    id: topLeftView
    anchors.fill: parent
    importScene: standAloneScene
    camera: cameraOrthographicFront
}

[Label](qml-qtquick-controls-label.html) {
    text: "Front"
    anchors.top: parent.top
    anchors.left: parent.left
    anchors.margins: 10
    color: "#222840"
    font.pointSize: 14
}

} ...

The top-right view has three buttons in it. The buttons can be used to switch the camera used in that view on the fly. The switching is done just by settings the camera property:

RoundButton { text: "Camera 1" highlighted: topRightView.camera == cameraPerspectiveOne implicitWidth: controlsContainer.buttonWidth onClicked: { topRightView.camera = cameraPerspectiveOne } } ...

Example project @ code.qt.io

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