new(raw:TTerrainData)
@:value([])heightTextures:Array<Image> = []
@:value(false)ready:Bool = false
@:value([])sectors:Array<MeshObject> = []
@:value(null)onReady:() ‑> Void = null
notifyOnReady(f:() ‑> Void):Void
remove():Void
update(camera:CameraObject):Void