In this code, you can see sample point cloud and label it. Please clone this code and open index.html using FireFox. Or please check web site demo.
How to label
Select Bounding Box
Click Bounding Box. You can see opening Bounding Box Tools(GUI Editor).
Add Bounding Box
Click AddBoundingBox Button. You can add New Bounding Box.
Edit Position & Scale
Edit position(X, Y, Z, delta x, delta y, delta z and yaw) and scale(width, height, depth) on GUI Editor.
Edit position(X, Y, Z, delta x, delta y, delta z) and scale(width, height, depth) directly.
Move Camera position
Push Shift and Drag to change 3D camera position. Push Shift and left or right to change 2D camera position. Push Shift and Scroll to go near or away.