From b1e53da2bb016ccd7547105c30b5d71208da3c4f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=27=C3=A9lectron=20rare?=
 <108685187+electron-rare@users.noreply.github.com>
Date: Fri, 26 Jun 2026 14:23:15 +0200
Subject: [PATCH] fix(avlivebody): track hand face depth to pelvis
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Drive HandFaceSkeleton.setDepth() from the body pelvis z each frame
(negated ARKit→RealityKit) so hand/face markers follow body depth
instead of rendering at the fixed default plane depth 0.
---
 avlivebody-mac/Sources/AVLiveBody/AVLiveBodyApp.swift   | 4 +++-
 avlivebody-mac/Sources/AVLiveBody/SceneController.swift | 4 +++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/avlivebody-mac/Sources/AVLiveBody/AVLiveBodyApp.swift b/avlivebody-mac/Sources/AVLiveBody/AVLiveBodyApp.swift
index 285f815..e935525 100644
--- a/avlivebody-mac/Sources/AVLiveBody/AVLiveBodyApp.swift
+++ b/avlivebody-mac/Sources/AVLiveBody/AVLiveBodyApp.swift
@@ -105,7 +105,9 @@ struct ContentView: View {
                                  hands: consumer.hands,
                                  face: consumer.face,
                                  prevPelvis: &prevPelvis)
-        controller.updateHandFace(hands: consumer.hands, face: consumer.face)
+        controller.updateHandFace(hands: consumer.hands,
+                                  face: consumer.face,
+                                  depth: Float(-(prevPelvis?.z ?? 0)))
     }
 
     private func wire() {
diff --git a/avlivebody-mac/Sources/AVLiveBody/SceneController.swift b/avlivebody-mac/Sources/AVLiveBody/SceneController.swift
index 39a9de5..0d64f24 100644
--- a/avlivebody-mac/Sources/AVLiveBody/SceneController.swift
+++ b/avlivebody-mac/Sources/AVLiveBody/SceneController.swift
@@ -95,7 +95,9 @@ final class SceneController {
         mesh?.update(persons)
     }
 
-    func updateHandFace(hands: HandsPayload?, face: FacePayload?) {
+    func updateHandFace(hands: HandsPayload?, face: FacePayload?,
+                        depth: Float) {
+        handFace?.setDepth(depth)
         handFace?.update(hands: hands, face: face)
     }