Reads head camera from Isaac Sim shared memory, encodes as JPEG (quality 85),
and relays to Quest 3 over the existing WebSocket connection at ~15fps.
Falls back to left/right wrist cameras if head SHM unavailable.
Prevents Python resource_tracker from destroying SHM on bridge exit.
Also increases WebSocket write buffer and reduces send rate for stability.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
R_FIX_HAND rotation corrects hand positions from body tracker frame (+X fingers)
to Inspire URDF frame (-Y fingers). Inverts normalization formula so open hand
maps to open robot hand. Adjusts inspire_hand.yml scaling/alpha for smoother tracking.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The dex-retargeting target_link_human_indices expect WebXR convention
(joint 0 = WRIST) but we were outputting OpenXR convention (joint 0 = PALM).
This caused the 5 difference vectors referencing index 0 to compute
palm-to-fingertip instead of wrist-to-fingertip, degrading tracking accuracy.
Also updates Inspire hand ranges and normalization formula.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Compute R_CORR empirically from measured rotation matrices:
R_CORR_L = Rz(+90°) @ Rx(180°), R_CORR_R = Rz(-90°) @ Rx(180°)
Body tracking wrist frame differs from hand tracking frame used
by the reference xr_teleoperate code.
- Switch finger joint data from XRBodyTracker to XRHandTracker.
XRBodyTracker doesn't provide articulated finger data on Quest 3;
XRHandTracker does via camera-based hand tracking.
25 joints: PALM + 24 finger joints (skip WRIST), matching
dex-retargeting's expected format.
- Re-enable hand retargeting in bridge main loop (was disabled
during arm IK testing).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
body_tracker.gd used Meta's raw XR_FB_body_tracking indices but Godot's
XRBodyTracker.get_joint_transform() expects Godot's own enum values.
The OpenXR vendors plugin remaps between them, so e.g. index 16
(Meta RIGHT_ARM_LOWER) was actually returning LEFT_FOOT data in Godot,
explaining why right elbow tracking showed floor-level positions.
Also switches retarget_bridge.py from Euler angle decomposition to IK
solver (Pinocchio/CasADi) with elbow position constraints from body
tracking l_lower/r_lower joints.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Replace flat JOINT_GAIN with per-joint JOINT_SCALE/JOINT_OFFSET linear mapping
for accurate retargeting (l_shoulder_pitch/roll/yaw, l_elbow calibrated)
- Switch shoulder parent from chest to hips to avoid head rotation contamination
- Add solo-joint mode (--solo-joint) for isolating single joints during testing
- Use XRHandTracker wrist transforms in body_tracker.gd for better wrist rotation
- Add joint_test.py for single-joint animation with pause-at-peak support
- Add joint_calibrate.py for XR-to-robot range calibration with scale+offset output
- Add calibration_log.md documenting extent tuning and axis mappings
- Disable waist/right arm/hands temporarily for left-arm-only testing
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Adds a joint retargeting bridge that converts Quest 3 body tracking
data into G1 robot joint commands for Isaac Sim via CycloneDDS.
- Extend body_tracker.gd with 8 body joint transforms (56 floats)
- Extend teleop_server.py with body_joints_shared memory
- Add retarget_bridge.py: body retargeting, hand mapping, DDS publishing
- Add launch_bridge.py: one-command launcher for sim + bridge
- Update requirements.txt with unitree-sdk2py dependency
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Godot 4.3 project for Quest 3 that replaces the browser-based WebXR
teleoperation with a native app using XR_FB_body_tracking (70 joints).
Key advantage: chest-relative wrist tracking eliminates head-position
subtraction artifacts and decouples body rotation from arm control.
Godot app: body_tracker.gd, teleop_client.gd, webcam_display.gd
Robot server: teleop_server.py (WebSocket, replaces Vuer ~900→~250 lines)
Drop-in wrapper: native_tv_wrapper.py (compatible with teleop_hand_and_arm.py)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
melancholytron
Joe DiPrima