CARLA 0.9.3

  * Upgraded to Unreal Engine 4.21
  * Upgraded Boost to 1.69.0
  * New Town04 (biggest so far), includes a freeway, new bridge and road barrier, a nicer landscape based on height-map, and new street props
  * New Town05, adding more variety of intersections for the scenario runner
  * Redesigned pedestrian models and animations (walk and idle) for male and female characters
  * Added sensor for detecting obstacles (ray-cast based)
  * Added sensor GNSS (GPS)
  * Basic agent integrated with global router
  * Added a few methods to manage an actor:
    - set_velocity: for setting the linear velocity
    - set_angular_velocity: for setting the angular velocity
    - get_angular_velocity: for getting the angular velocity
    - add_impulse: for applying an impulse (in world axis)
  * Renamed vehicle.get_vehicle_control() to vehicle.get_control() to be consistent with walkers
  * Added new mesh for traffic lights
  * Added new pine tree assets, with their LODs finely tuned for performance
  * Added point transformation functionality for LibCarla and PythonAPI
  * Added "sensor_tick" attribute to sensors (cameras and lidars) to specify the capture rate in seconds
  * Added Export/Import map tools
  * Added "get_forward_vector()" to rotation and transform, retrieves the unit vector on the rotation's X-axis
  * Added support for Deepin in PythonAPI's setup.py
  * Added support for spawning and controlling walkers (pedestrians)
  * Updated BasicAgent to allow setting target_speed and handle US-style traffic lights properly
  * OpenDriveActor has been rewritten using the Waypoint API, this has fixed some bugs
  * Remove crash reporter from packaged build
  * Improved simulator fatal error handling, now uses UE4 fatal error system
  * LibCarla server pipeline now compiles with exceptions disabled for better performance and compatibility with UE4
  * Fixed TCP accept error, too many open files while creating and destroying a lot of sensors
  * Fixed lost error messages in client-side, now when a request fails it reports the reason
  * Fixed global route planner to handle round about turns and made the code consistent with local planner
  * Fixed local planner to avoid premature route pruning at path overlaps
  * Fixed autopilot direction not properly initialized that interfered with the initial raycast direction
  * Fixed crash when an actor was destroyed but not de-registered, e.g. falling out of world bounds

CARLA 0.9.2

  * Updated ROS bridge for CARLA 0.9.X (moved to its own repository)
  * Added Python API "agents" extension, includes
    - Global route planner based on the Waypoints API (compatible with OpenDrive)
    - BasicAgent: new client agent that can drive to a given coordinate of the map using the waypoint API and PID controllers, attending to other vehicles and traffic lights
    - RoamingAgent: new client agent that can drive at different speeds following waypoints based on PID controllers, attending to other vehicles and traffic lights
    - LocalPlanner functionality to navigate waypoints using PID controllers
    - LateralControl and LongitudinalControl PIDs
  * Add support for manual gear shifting
  * Add "role_name" attribute to actors to easily identify the "hero" vehicle
  * Updates to documentation and tutorials
  * Simulator now starts by default in windowed mode
  * CMake version required downgraded to 3.5 for better compatibility
  * Fix waypoints height were all placed at zero height
  * Fix actors in world.get_actors() missing parent actor
  * Fix some vehicles losing their wheels after calling set_simulate_physics
  * Several fixes and improvements to OpenDriveActor

CARLA 0.9.1

  * New town: Town03
    - Created with Vector Zero's RoadRunner (including OpenDrive information of the road layout)
    - Bigger and more diverse
    - More road variety: multiple lanes and lane markings, curves at different angles, roundabout, elevation, tunnel
  * Lots of improvements to the Python API
    - Support for Python 3
    - Support for retrieving and changing lighting and weather conditions
    - Migrated Lidar sensor
    - Migrated image converter methods: Depth, LogarithmicDepth, and CityScapesPalette
    - Migrated IO methods for sensor data, "save_to_disk" available for PNG, JPEG, TIFF, and PLY
    - Added support for requesting the list of all the actors alive in the current world, `world.get_actors()`
    - `world.get_actors()` returns an `ActorList` object with `filter` functionality and lazy initialization of actors
    - Added collision event sensor, "sensor.other.collision", that triggers a callback on each collision to the actor it is attached to
    - Added lane detector sensor, "sensor.other.lane_detector", that detects lane invasion events
    - Added `carla.Map` and `carla.Waypoint` classes for querying info about the road layout
      - Added methods for converting and saving the map as OpenDrive format
      - Added `map.get_spawn_points()` to retrieve the recommended spawn points for vehicles
      - Added `map.get_waypoint(location)` to query the nearest waypoint
      - Added `map.generate_waypoints(distance)` to generate waypoints all over the map at an approximated distance
      - Added `map.get_topology()` for getting a list the tuples of waypoints that define the edges of the road graph
      - Added `waypoint.next(distance)` to retrieve the list of the waypoints at a distance that can be driven from this waypoint
    - Added `parent` attributes to actors, not None if the actor is attached to another actor
    - Added `semantic_tags` to actors containing the list of tags of all of its components
    - Added methods for retrieving velocity and acceleration of actors
    - Added function to enable/disable simulating physics on an actor, `actor.set_simulate_physics(enabled=True)`
    - Added bounding boxes to vehicles, `vehicle.bounding_box` property
    - Exposed last control applied to vehicles, `vehicle.get_vehicle_control()`
    - Added a "tick" message containing info of all the actors in the scene
      - Executed in the background and cached
      - Added `world.wait_for_tick()` for blocking the current thread until a "tick" message is received
      - Added `world.on_tick(callback)` for executing a callback asynchronously each time a "tick" message is received
      - These methods return/pass a `carla.Timestamp` object containing, frame count, delta time of last tick, global simulation time, and OS timestamp
      - Methods retrieving actor's info, e.g. `actor.get_transform()`, don't need to connect with the simulator, which makes these calls quite cheap
    - Allow drawing debug shapes from Python: points, lines, arrows, boxes, and strings (`world.debug.draw_*`)
    - Added id (id of current episode) and map name to `carla.World`
    - Exposed traffic lights and signs as actors. Traffic lights have a specialized actor class that has the traffic light state (red, green, yellow) as property
    - Added methods for accessing and modifying individual items in `carla.Image` (pixels) and `carla.LidarMeasurement` (locations)
    - Added `carla.Vector3D` for (x, y, z) objects that are not a `carla.Location`
    - Removed `client.ping()`, `client.get_server_version()` accomplishes the same
    - Renamed `contains_X()` methods to `has_X()`
    - Changed `client.set_timeout(seconds)` to use seconds (float) instead of milliseconds
    - Allow iterating attributes of an Actor's Blueprint
    - Fixed wildcard filtering issues, now "vehicle.*" or "*bmw*" patterns work too
    - Fixed `actor.set_transform()` broken for attached actors
  * More Python example scripts and improved the present ones
    - Now all the scripts use the list of recommended spawn points for each map
    - Renamed "example.py" to "tutorial.py", and updated it with latest changes in API
    - Added timeout to the examples
    - "manual_control.py" performance has been improved while having more measurements
    - "manual_control.py" now has options to change camera type and position
    - "manual_control.py" now has options to iterate weather presets
    - "manual_control.py" now has a fancier HUD with lots of info, and F1 key binding to remove it
    - Added "dynamic_weather.py" to change the weather in real-time (the one used in the video)
    - Added "spawn_npc.py" to quickly add a lot of NPC vehicles to the simulator
    - Added "spawn_npc.py --safe" to only add non-problematic vehicles
    - "vehicle_gallery.py" also got some small fixes
  * Asset and content improvements
    - New vehicle: Lincoln MKZ 2017
    - Refactored weather system, parametrized to make it easier to use
    - Improved control of bikes and motorbikes, still not perfect but causes less accidents
    - Added building block generator system
    - Misc city assets: New building, tunnel columns, rail-road bridges, new textures, new urban props
    - Adjusted vehicle physics and center of mass
    - Adjusted the maximum distance culling for foliage
    - Adjusted pedestrian animations and scale issues (not yet available with new API though)
    - Improved map building blueprints, spline based asset repeaters, and wall building tools
    - Replaced uses of Unreal's Foliage system with standard static meshes to work around a visual bug in Linux systems
    - Fixed filenames too long when packing the project on Windows
    - Fixed "SplineMeshRepeater" loses its collider mesh from time to time
    - Standardized asset nomenclature
  * New system for road information based on OpenDrive format
    - Added new map classes for querying info about the road layout and topology
    - Added methods for finding closest point on the road
    - Added methods for generating and iterating waypoints based on the road layout
    - Added OpenDrive parser to convert OpenDrive files to our map data structures
  * Other miscellaneous improvements and fixes
    - Fixed single channel Lidar crash (by @cwecht)
    - Fixed command-line argument `-carla-settings` fails to load absolute paths (by @harlowja)
    - Added an option to command-line to change quality level when launching the simulator, `-quality-level=Low`
    - Added ROS bridge odometry message (by @ShepelIlya)
    - New lens distortion shader, sadly not yet integrated with our cameras :(
    - New Docker tutorial
    - Disabled texture streaming to avoid issue of textures not loading in scene captures
    - Adjusted scene capture camera gamma to 2.4
    - Fixed leaking objects in simulation when despawning a vehicle. Now Pawn's controller is destroyed too if necessary when destroying an Actor
    - Fixed overflow on platform time-stamp, now it uses `double`
    - Upgraded @rpclib to fix crash when client exits too fast (rpclib/PR#167)
    - Moved "PythonClient" inside deprecated folder to avoid confusion
    - Refactored sensor related code
      - New plugin system for sensors that simplifies adding sensors, mini-tutorial at carla-simulator#830
      - Compile-time dispatcher for sensors and serializers
  * Improvements to the streaming library
    - Added multi-streams for streaming simultaneously to multiple clients (used by the "tick" message)
    - Messages re-use allocated memory when possible
    - Allows unsubscribing from a stream
    - Fixed client receives interleaved sensor messages, some messages can be discarded if connection is too slow though
    - Fixed streaming client fails to connect in Windows
    - Fixed streaming client keeps trying to reconnect after destroying a sensor
  * Refactored client C++ API
    - Python GIL is released whenever possible to avoid blocking
    - Fixed deadlock when closing the simulator while a client is connected
    - Fixed crash on simulator shutdown if a client has connected at some point
    - Set methods are now sent async which greatly improves performance in the client-side
    - Vehicle control is cached and not sent if haven't changed
    - Suppressed exceptions in destructors
  * Other development improvements
    - Improved Linux Makefile, fine-grained targets to reduce compilation times in development
    - Workaround for "setup.py" to link against "libcarla_client.a" again (Linux only)
    - Added support for ".gtest" file, each line of this file is passed to GTest executables as arguments when running `make check` targets
    - Python eggs are also archived on Jenkins to easily get them without downloading the full package
    - Added uncrustify config file for formatting UE4 C++ code

CARLA 0.9.0

  * Upgraded to Unreal Engine 4.19
  * Redesign of the networking architecture
    - Allows any number of clients to connect simultaneously
    - Now is possible to add and remove at any time any vehicle or camera
    - Now is possible to control any vehicle or camera
    - Now is possible to place cameras anywhere
    - Reduced to two ports instead of three
    - First port uses an RPC protocol based on [rpclib](http://rpclib.net/)
    - Second port is for the streaming of the sensor data
  * Redesign of the Python API
    - Actors and sensors are now exposed in the API and can be independently controlled
    - The Python module is built in C++, with significant performance gain in some operations
    - Many functionality haven't been ported yet, so expect a lot of things missing
  * Redesign of the build system to accommodate the changes in dependencies
    - Everything can be done now with the Makefile
    - For the moment only Linux is supported, sorry
  * Massive clean up of all unused assets
  * Some aesthetic fixes to the vehicles

CARLA 0.8.4

  * Community contribution: ROS bridge by @laurent-george
  * New vehicle: Tesla Model 3
  * Added an option to _"CarlaSettings.ini"_ to disable bikes and motorbikes
  * Fixed missing collision of vehicles introduced in 0.8.3
  * Improved stability of bikes and motorbikes
  * Improved autopilot turning behaviour at intersections, now using front wheels positions as reference
  * Temporarily removed Kawasaki Ninja motorbikes because the model was having some stability issues

CARLA 0.8.3

  * Added two-wheeled vehicles, 3 bicycles and 4 motorbikes
  * Several art optimizations (CARLA is now about 10% faster)
    - Improved the performance of vegetation assets, adjusted LOD and culling distance, set billboards where possible
    - Drastically reduced the number of polygons of the landscape while keeping the original shape
    - Removed some high-cost unnecessary assets
    - Remodelled Mustang and NissanMicra, now with less polygons and materials, better textures and LOD
    - Remodelled building SM_TerracedHouse_01, now with more polygons but less materials and better textures
  * CARLA releases include now a Dockerfile for building docker images
  * Change in HUD: replace "FPS" by "Simulation Step"
  * The current map name is now included in the scene description message sent to the client
  * Adapted "manual_control.py" and "view_start_positions.py" to use the map name sent by the simulator
  * Improved the vehicle spawning algorithm, now it tries to spawn as much cars as possible even if there are not enough spawn points
  * "Setup.sh" is now faster and accepts an argument to run multiple jobs in parallel
  * Fixed foliage distance culling using wrong distance in "Low Mode"
  * Fixed NissanMicra slightly turning left when driving straight

CARLA 0.8.2

  * Revamped driving benchmark
    - Changed name from benchmark to driving benchmark
    - Fully Redesigned the architecture of the module
    - Added a lot more documentation
    - Now you can stop and resume the benchmarks you run
  * Rolled back vehicle's location to the pivot of the mesh instead of the center of the bounding box
  * Added relative transform of the vehicle's bounding box to the measurements, player and non-players
  * Added "frame number" to each sensor measurement so it is possible to sync all the measurements based on the frame they are produced
  * Improved vehicle spawner to better handle spawning failures
  * Walkers use now a closer angle to detect vehicles, so they don't stop moving if a car passes nearby
  * Fixed lighting artefact causing the road to change its brightness depending on the distance to the camera
  * Fixed captured images overexposed in Low mode
  * Fixed illegal character in asset name
  * Fixed editing sun azimuth angle in CarlaWeadther.ini had no effect
  * Fixed crash when using a non-standard image size in DirectX (Windows)
  * Fixed issue with using multiple "SceneCaptureToDiskCamera"

CARLA 0.8.1

  * New Python example for visualizing the player start positions
  * Fixed box extent of non-player agents was sent in centimeters instead of meters
  * Fixed speed limits were sent in km/h instead of m/s
  * Fixed issue in Volkswagen T2 wheels causing it to overturn

CARLA 0.8.0

  * Upgraded to Unreal Engine 4.18
  * Created our own pedestrian 3D models free to use and distribute
  * Removed Epic's Automotive Materials dependencies
  * 360 Lidars support (similar to Velodyne HDL-32E or VLP-16) thanks to Anton Pechenko (Yandex)
    - Ray-cast based
    - Configurable settings
    - Added methods to save points to disk as PLY file
  * Added quality level settings
    - Low: low quality graphics, about 3 times faster with one camera
    - Epic: best quality (as before)
  * Measurements now use SI units
    - Locations:    m
    - Speed:        m/s
    - Acceleration: m/s^2
    - Collisions:   kg*m/s
    - Angles:       degrees
  * Added API methods to convert depth images to a point cloud
    - New method "image_converter.depth_to_local_point_cloud"
    - A supplementary image can be passed to attach colors to the points
    - New client example generates a point cloud in world coordinates
    - Added Transform class to Python API
  * Performance optimizations
    - Significant speed improvements in both Epic and Low modes
    - Fixed materials and improved shaders for roads, architecture, sidewalks, foliage, landscapes, cars, walkers, reflections, water
    - Execution of a set of Project and Engine parameters to improve performance (quality, vsync, AO, occlusion)
    - Generation of the road pieces using static meshes and actors instead of a single actor with instanced meshes
      - Improved performance since now is able to apply occlusion and draw distance
    - Images are captured asynchronously in the render thread
      - In asynchronous mode, images may arrive up to two frames later
      - In synchronous mode, game thread is blocked until images are ready
    - Blueprint code optimizations for vehicles, walkers, and splines
    - Added a way to configure different quality levels with culling distance and materials configuration
  * Refactored sensor related code to ease adding new sensors in the future
  * Added vehicle box extent to player measurements
  * Removed the player from the list of non-player agents
  * Adjusted bounding boxes to vehicles' height
  * Changed vehicles' center to match bounding box
  * Added autopilot mode to manual_control.py
  * Added quality level options to manual_control.py and client_example.py
  * Replaced background landscape and trees by a matte painting
  * Fixed road map generated some meshes twice
  * Small improvements to Windows support
    - Fixed issues with the Makefile
    - Fixed asset names too long or containing special characters

CARLA 0.7.1

  * New Python API module: Benchmark
    - Defines a set of tasks and conditions to test a certain agent
    - Contains a starting benchmark, CoRL2017
    - Contains Agent Class: Interface for benchmarking AIs
  * New Python API module: Basic Planner (Temporary Hack)
    - Provide routes for the agent
    - Contains AStar module to find the shortest route
  * Other Python API improvements
    - Converter class to convert between Unreal world and map units
    - Metrics module to summarize benchmark results
  * Send vehicle's roll, pitch, and yaw to client (orientation is now deprecated)
  * New RoutePlanner class for assigning fixed routes to autopilot (IntersectionEntrance has been removed)
  * Create a random engine for each vehicle, which greatly improves repeatability
  * Add option to skip content download in Setup.sh
  * Few small fixes to the city assets