StereoKit "Reset to center"

SKRecenter.cs

using StereoKit;

SK.Initialize("SKRecenter");
SK.Run(() => {
	Mesh.Sphere.Draw(Material.Default, Matrix.TS(0, 0, -0.5f, 0.1f));

	if (Input.Key(Key.Space).IsJustActive()) {
		// Get the head pose, and flatten the rotation to just the Y axis.
		Pose head = Input.Head;
		head.orientation.x = 0;
		head.orientation.z = 0;
		head.orientation.Normalize();

		Pose root = Renderer.CameraRoot.Pose;
		Renderer.CameraRoot = Matrix.TR(
			head.orientation.Inverse * (root.position-head.position),
			root.orientation * head.orientation.Inverse
		);
	}
});