Update README.md

README.md

@@ -31,14 +31,26 @@ Most existing datasets and models for 3D layout estimation are tailored for smal
 - Annotations of stairs as 3D polygons.
 - Scenes with up to **5 floors** and **40+ rooms per floor**, covering a diverse range of building types.
 
-## Data Structure
-
-HouseLayout3D
-/ structures/{scene}.obj - base layout as a triangle mesh (without doors or windows)
-/ structures/layouts_split_by_entity/{scene}/*.obj - individual wall / ceiling / floor entities (jointly, they compose the base layout)
-/ doors/{scene}.json - door annotations: each door consists of a list of four corners. The "normal" field indicates the opening direction.
-/ windows/{scene}.json - window annotations: each window consists of a list of four corners.
-/ stairs/{scene}/*.ply - stair annotations: each file represents a staircase entity (i.e. a polygonal surface following the steps. The steps themselves are part of the base layout.)
+## Usage
 
 
 
+## Data Structure
+```text
+HouseLayout3D/
+├── structures/
+│   ├── {scene}.obj
+│   │   → Base layout as a triangle mesh (without doors or windows)
+│   └── layouts_split_by_entity/
+│       └── {scene}/*.obj
+│           → Individual wall / ceiling / floor entities (jointly compose the base layout)
+├── doors/
+│   └── {scene}.json
+│       → Door annotations: each door is a list of 4 corners. The "normal" field indicates opening direction.
+├── windows/
+│   └── {scene}.json
+│       → Window annotations: each window is a list of 4 corners.
+├── stairs/
+│   └── {scene}/*.ply
+│       → Stair annotations as polygonal surfaces that follow the steps (steps themselves are part of the base layout)
+```