omniscenes_region_format.md

• region_name

  • json_path: string
  • region_type: string
  • region_boundary_type: string (“polygon” or “rectangle”)
  • region_boundary_info:
    • polygon
      • Type: list of coordinate pairs
      • Structure:

        [
          [float, float],
          [float, float],
          …
        ]
        

    • rectangle
      • Type: object
      • Fields:
        • width: float
        • length: float
  • objects: list of object entries
    • Each entry:
      • object_name: string
      • category: string
      • translation: [float, float, float]
      • zxy_rotation: [float, float, float]
      • size: [float, float, float]
      • scale: [float, float, float]

• note:

  • The asset’s default forward direction is along the positive X‑axis.
  • Euler angles type is Intrinsic Z–X–Y. You can use Trimesh package to get world-to-obj transform:
    • rotation_matrix = trimesh.transformations.euler_matrix(zxy_rotation[0], zxy_rotation[1], zxy_rotation[2], axes='rzxy')