Improve XLEVR_PATH by using automatic detection instead of hardcoded paths

[Copilot]

Problem

The XLEVR_PATH variable was hardcoded to /home/vec/lerobot/new/XLeVR in both vr_monitor.py files, making the code non-portable across different systems and requiring manual editing for each user:

# Before: Hardcoded path specific to one developer's system
XLEVR_PATH = "/home/vec/lerobot/new/XLeVR"

This caused issues when:

• Cloning the repository to a different location
• Running on different user accounts or systems
• Sharing code with collaborators

Solution

Implemented automatic path detection with environment variable override support:

XLeVR/vr_monitor.py

# Now automatically detects the script's directory
XLEVR_PATH = os.environ.get('XLEVR_PATH', str(Path(__file__).parent.resolve()))

simulation/Maniskill/examples/vr_monitor.py

# Calculates path relative to repository root (3 levels up)
_script_dir = Path(__file__).parent.resolve()
_default_xlevr_path = _script_dir.parent.parent.parent / "XLeVR"
XLEVR_PATH = os.environ.get('XLEVR_PATH', str(_default_xlevr_path))

Additional Improvements

• Updated error messages from "Please update XLEVR_PATH in the script" to "Please set the XLEVR_PATH environment variable to the correct path"
• Fixed comment typo: changed "检查telegrip路径" to "检查XLeVR路径"

Benefits

• Zero configuration: Scripts work out-of-the-box in any repository clone
• Portable: Works across different systems, directories, and user accounts
• Flexible: Environment variable allows easy override for custom setups
• Maintainable: No hardcoded paths to update when moving the repository

Usage

Default behavior (automatic detection)

cd XLeRobot/XLeVR
python3 vr_monitor.py
# Automatically detects and uses the correct XLeVR path

Custom path override

export XLEVR_PATH=/custom/xlevr/path
python3 vr_monitor.py
# Uses the custom path

Testing

All changes have been verified:

• ✅ Python syntax validation passes
• ✅ Automatic path detection works correctly for both scripts
• ✅ Environment variable override functions properly
• ✅ Scripts run and correctly identify paths (tested with missing dependencies)

Files Changed

• XLeVR/vr_monitor.py (3 lines modified)
• simulation/Maniskill/examples/vr_monitor.py (7 lines modified)

No migration action required from users - changes are fully backward compatible!

Original prompt

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This section details on the original issue you should resolve

<issue_title>Improve XLEVR_PATH by avoiding manual setting in the code</issue_title>
<issue_description></issue_description>

Comments on the Issue (you are @copilot in this section)

Fixes #5

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