[feature request] Expose face direction

[Mel Massadian]

This here:

ComfyUI-LivePortraitKJ/liveportrait/utils/face_analysis_diy.py

Lines 28 to 46 in 2a7bd61

 def sort_by_direction(faces, direction: str = 'large-small', face_center=None): 
     if len(faces) <= 0: 
         return faces 
  
     if direction == 'left-right': 
         return sorted(faces, key=lambda face: face['bbox'][0]) 
     if direction == 'right-left': 
         return sorted(faces, key=lambda face: face['bbox'][0], reverse=True) 
     if direction == 'top-bottom': 
         return sorted(faces, key=lambda face: face['bbox'][1]) 
     if direction == 'bottom-top': 
         return sorted(faces, key=lambda face: face['bbox'][1], reverse=True) 
     if direction == 'small-large': 
         return sorted(faces, key=lambda face: (face['bbox'][2] - face['bbox'][0]) * (face['bbox'][3] - face['bbox'][1])) 
     if direction == 'large-small': 
         return sorted(faces, key=lambda face: (face['bbox'][2] - face['bbox'][0]) * (face['bbox'][3] - face['bbox'][1]), reverse=True) 
     if direction == 'distance-from-retarget-face': 
         return sorted(faces, key=lambda face: (((face['bbox'][2]+face['bbox'][0])/2-face_center[0])**2+((face['bbox'][3]+face['bbox'][1])/2-face_center[1])**2)**0.5) 
     return faces 

Defines how the index behaves. Currently, it defaults to large-small meaning 0 is the biggest face in the frame, and subsequent indexes are smaller faces... This should probably either default to left-right or be exposed

[Jukka Seppänen]

Should be exposed in my opinion, large-small as default makes sense in single face scenarios as you generally want to target the main face, while left-right probably makes most sense when doing multiple faces.