Qt Quick 3D - XR Freeform Teleportation Example

Overview

This example shows how to move to places in the virtual environment using a simple freeform teleportation system, a non-continuous form of movement.

Controls

For navigation, use the thumbstick on the right controller:

• Push the stick forwards to aim, and release it to teleport.
• Move the stick sideways to rotate.

Implementation

The teleportation logic is implemented in the FreeformTeleporter component. This is located in the separate sub-project xr_shared, so you can easily re-use it in other projects.

 FreeformTeleporter {
     id: teleporter

     view: xrView
     originNode: xrOrigin
     cameraNode: xrOrigin.camera
     beamHandle: xrRightController

     rotationTriggerValue: xrRightController.xValue
     teleportTriggerValue: xrRightController.yValue

     onDoTeleportation: (cameraOriginPosition)=> {
                            xrOrigin.position = cameraOriginPosition
                        }
     onDoRotation: (cameraOriginRotation, cameraOriginPosition)=> {
                       xrOrigin.rotation = cameraOriginRotation
                       xrOrigin.position = cameraOriginPosition
                   }
 }

The FreeformTeleporter component has the following properties that need to be set:

 QtObject xrView

The xrView property gives access to XrView's built-in ray-picking. You can use any object that implements a rayPick method. For example, a View3D may be useful for prototyping.

 Node originNode

The originNode property specifies the node that the freeform teleporter will manipulate. In XR, artificial locomotion is performed by moving the XrOrigin. We will therefore use the xrOrigin of our XrView as the originNode.

 Node cameraNode

The cameraNode property provides the position of the camera. When rotating, it defines the center of rotation. When teleporting, it defines the position that will be placed over the selected location. In this example, we use the tracked XrCamera we created earlier.

 Node beamHandle

The beamHandle property is the Node used as the teleportation beam's start point. In this example, we use the right controller as the beamHandle.

Example project @ code.qt.io