# 3d-tiles-renderer/three: Constants

## Constants

### ENU_FRAME

Frame constant for the East-North-Up (ENU) coordinate frame, with X pointing east,
Y pointing north, and Z pointing up (away from the ellipsoid surface).

### CAMERA_FRAME

Frame constant for a camera-convention frame relative to the ENU frame, oriented with
"+Y" up and "-Z" forward (matching three.js camera conventions).

### OBJECT_FRAME

Frame constant for an object-convention frame relative to the ENU frame, oriented with
"+Y" up and "+Z" forward (matching three.js object conventions).