feat(viz): skeleton joints to SC via pose/skel

Add /pose/skel OSC route emitting nose, shoulders, hips,
knees and ankles (18 floats) from _emit_person. Add
\poseSkel OSCdef in data_feeds.scd storing the 9 joint
positions per pid; cleanup on \poseLeave.

data_only_viz/pose_bridge.py

@@ -194,6 +194,17 @@ class PoseSoundBridge:
             try: self._avbody.send_message("/pose/limb_span", [pid, float(span)])
             except OSError: pass
 
+        if len(body) >= 29:
+            def _xy(i):
+                kp = body[i]
+                return [float(getattr(kp, "x", 0.0)), float(getattr(kp, "y", 0.0))]
+            skel = [pid]
+            for idx in (0, 11, 12, 23, 24, 25, 26, 27, 28):   # nose, sh L/R, hip L/R, knee L/R, ank L/R
+                skel += _xy(idx)
+            cli.send_message("/pose/skel", skel)
+            try: self._avbody.send_message("/pose/skel", skel)
+            except OSError: pass
+
     # ------------------------------------------------------------------
     def send_face(self, persons_face: Sequence[Sequence[Any]],
                   persons_face_ids: Sequence[int], t_now: float,

sound_algo/control/data_feeds.scd

@@ -496,6 +496,7 @@ OSCdef(\poseLeave, { |msg|
     ~poseKin.removeAt(pid);
     ~poseCenter.removeAt(pid);
     ~poseWrist !? { ~poseWrist.removeAt(pid) };
+    ~poseSkel !? { ~poseSkel.removeAt(pid) };
 }, '/pose/leave');
 
 OSCdef(\poseHands, { |msg|
@@ -521,6 +522,15 @@ OSCdef(\poseWrist, { |msg|
     ~poseWrist[pid] = e;
 }, '/pose/wrist');
 
+~poseSkel = ~poseSkel ? Dictionary.new;
+OSCdef(\poseSkel, { |msg|
+    var pid = msg[1].asInteger;
+    var p = { |i| (x: msg[2 + (i*2)], y: msg[3 + (i*2)]) };
+    ~poseSkel[pid] = (
+        nose: p.(0), shL: p.(1), shR: p.(2), hipL: p.(3), hipR: p.(4),
+        kneeL: p.(5), kneeR: p.(6), ankL: p.(7), ankR: p.(8));
+}, '/pose/skel');
+
 ~poseCenter = ~poseCenter ? Dictionary.new;
 OSCdef(\poseCenter, { |msg|
     var pid = msg[1].asInteger;