- Qt 5.15
- Qt 3D
- Qt 3D: Scene3DView QML Example
- Qt 5.15.19 Reference Documentation

# Qt 3D: Scene3DView QML Example

A QML application that demonstrates visualizing multiple 3D scenes using Scene3D and Scene3DView.

This example demonstrates visualizing multiple 3D scenes from a Qt Quick application usinc Scene3D and Scene3DView. Each 3D scene contains a single active camera and a single active light source. Visualized data is assumed to be at a fixed location.

#### Running the Example

To run the example from Qt Creator, open the Welcome mode and select the example from Examples. For more information, visit Building and Running an Example.

#### Visualizing 3D Scenes

First we set up a Scene3D instance that will be required for our Scene3DView instanced.

     Scene3D {
         id: scene3dInstance
         anchors.fill: parent
         focus: true
         aspects: ["input", "logic"]
         cameraAspectRatioMode: Scene3D.AutomaticAspectRatio
         multisample: true
     }

Then we instanciate our Scene3DView instances and make them reference the Scene3D. We also provide a root Entity for each Scene3DView with a scene3dview/AnimatedEntity.qml.

     Rectangle {
         width: grid.cellWidth
         height: grid.cellHeight
         color: "darkRed"
         scale: ma.pressed || ma.containsMouse ? 0.8 : 1
         Behavior on scale { NumberAnimation { duration: 750 } }

         Scene3DView {
             onXChanged: console.log(("X (%1): %2").arg(model.index).arg(x))
             scene3D: scene3dInstance
             anchors.fill: parent
             AnimatedEntity {
                 sceneColor: grid.colors[model.index]
                 // Only clear the color for the first Scene3DView
                 clearColor: model.index === 0
             }
         }
         Text {
             anchors {
                 horizontalCenter: parent.horizontalCenter
                 bottom: parent.bottom
             }

             color: "white"
             font.bold: true
             text: "Scene3DView " + (model.index + 1)
         }

         MouseArea {
             id: ma
             anchors.fill: parent
             hoverEnabled: true
         }
     }

Care has to be taken that only the first Scene3DView clears the color buffer. We don't want each Scene3DView to clear the screen as that would erase content for all but the last Scene3DView.

     // Only clear the color for the first Scene3DView
     clearColor: model.index === 0

Example project @ code.qt.io