RealityKit Pivot Points

For the past month and a half, I've been mentoring students in the second Kodeco visionOS Bootcamp. One of the projects submitted involved creating a controllable robotic arm. The challenge was trying to figure out how to rotate or transform the robot arm Entities connected at a joint. The student figured it out eventually (see the links below).
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The very next day, we discovered that Apple WWDR had published a document and sample code about the new RealityKit 2.0 physics simulation components: PhysicsJointsComponent() and PhysicsSimulationComponent(). The former allows us to create a hinge point, and to pivot child entities around that point. I've included Apple's link as well as simplified POC I made to try out the concept.
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One more thing... Apple hosted Vision Pro developers at the Development Center in Cupertino last week. The Apple Vision Pro evangelists presented some closer looks a designing and developing for the Vision Pro. Roughly 170 developers attended.

Here are some of the best picks:

The Kodeco's visionOS Bootcamp has wrapped up. Stay tuned for a new session in 2025.

• ​Performing a rotation transform on an already transformed entity in a RealityView - a thread about creating pivots.
• ​Simulating physics joints in your RealityKit app - Apple's document on the new physics simulations
• ​Designing RealityKit content with Reality Composer Pro. Updated documentation on Reality Composer Pro 2.0
• ​visionOS: Beyond the Basics - a course that covers Reality Composer Pro and RealityKit. May require a subscription. YMMV
• ​TimeForCube - updated Based on WWDC23 video, I code updated to work with Xcode 15.3+.
• ​Incorporating real-world surroundings in an immersive experience Apple's updated TimeForCube code for visionOS 2.0.
• ​Reality Mixer Pro Mixed Reality Capture app for the Vision Pro by Fabio Dela Antonio on X. Reality Mixer lets you use your iPhone or iPad to display and record Vision Pro apps in Mixed Reality.
• Here's my simplified version of the Pendulum pivots. The ball is connected to the green box in the simulation. The string is actually a child of the ball entity and rotates with it. However it looks like the ball is swinging on the string.

The other non-visionOS thing I tried last week was the NotebookLM. I was able to feed it some technical information I produced, and it made a podcast episode with AI speakers. I'm going to submit some of my visionOS documentation and see what comes out.
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App Lists:

• ​Vision Directory​
• ​Apps For Vision Pro​

As usual check out my Awesome visionOS Resources
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