RELEASE_NOTES.md

DeepMind Lab Release Notes

Next Release

Minor Improvements:

1. Improve documentation of how to configure non-hermetic dependencies (Lua, Python, NumPy).
2. Add 'allowHoldOutLevels' setting to allow running of levels that should not be trained on, but held out for evaluation.
3. Add logging library 'common.log', which provides the ability to control which log messages are emitted via the setting 'logLevel'.
4. Update the ioq3 upstream code to the latest state.
5. Lua 5.1 is now downloaded and built from source, and is thus no longer a required local dependency.
6. A minimal version of the "realpath" utility is now bundled with the code, and thus "realpath" is no longer a required local dependency.

Bug Fixes:

1. Prevent missing sounds from causing clients to disconnect.
2. Fix a bug in the call of the theme callback 'placeFloorModels', which had caused an "'index' is missing" error during compilation of text levels with texture sets that use floor models, such as MINESWEEPER, GO, and PACMAN.

release-2018-06-20 June 2018 release

New Levels:

1. Psychlab.

   1. contributed/psychlab/glass_pattern_detection
   2. contributed/psychlab/landoltC_identification
   3. contributed/psychlab/motion_discrimination{,_easy}
   4. contributed/psychlab/multiple_object_tracking{,_easy}
   5. contributed/psychlab/odd_one_out

Bug Fixes:

1. Let Python level cache set to None mean the same as not setting it at all.
2. Change Python module initialization in Python-3 mode to make PIP packages work in Python 3.

Minor Improvements:

1. Add support for absl::variant to lua::Push and lua::Read.
2. The demo :game has a new flag --start_index to start at an episode index other than 0.
3. Add a console command dm_pickup to pick up an item identified by its id.
4. More Python demos and tests now work with Python 3.
5. Add a shader for rendering decals with transparency.

release-2018-05-15 May 2018 release

New Levels:

1. DMLab-30.

   1. contributed/dmlab30/psychlab_arbitrary_visuomotor_mapping
   2. contributed/dmlab30/psychlab_continuous_recognition

2. Psychlab.

   1. contributed/psychlab/arbitrary_visuomotor_mapping
   2. contributed/psychlab/continuous_recognition

New Features:

1. Support for level caching for improved performance in the Python module.
2. Add the ability to spawn pickups dynamically at arbitrary locations.
3. Add implementations to read datasets including Cifar10 and Stimuli.
4. Add the ability to specify custom actions via 'customDiscreteActionSpec' and 'customDiscreteAction' callbacks.

Bug Fixes:

1. Fix playerId and otherPlayerId out by one errors in 'game_rewards.lua'.
2. Require playerId passed to game:addScore to be one indexed instead of zero indexed and allow game:addScore to be used without a playerId.
3. game:renderCustomView now renders the view with top-left as the origin. The previous behaviour can be achieved by calling reverse(1) on the returned tensor.
4. Fix a bug in image.scale whereby the offset into the data was erroneously ignored.
5. Fix a typo in a require statement in visual_search_factory.lua.
6. Fix a few erroneous dependencies on Lua dictionary iteration order.
7. game:AddScore now works even on the final frame of an episode.

Minor Improvements:

1. Moved .map files into assets/maps/src and .bsp files into assets/maps/built. Added further pre-built maps, which removes the need for the expensive :map_assets build step.
2. Allow game to be rendered with top-left as origin instead of bottom-left.
3. Add 'mixerSeed' setting to change behaviour of all random number generators.
4. Support for BGR_INTERLEAVED and BGRD_INTERLEAVED observation formats.
5. Add a Lua API to load PNGs from file contents.
6. Add 'eyePos' to playerInfo() for a more accurate eye position of player. Used in place of player pos + height.
7. Add support for absl::string_view to lua::Push and lua::Read.
8. Allow player model to be overridden via 'playerModel' callback.
9. Add ability to specify custom actions via 'customDiscreteActionSpec' and 'customDiscreteAction' callbacks.
10. Add game:console command to issue Quake 3 console commands directly.
11. Add clamp to tensor operations.
12. Add new callback api:newClientInfo, allowing each client to intercept when players are loading.
13. Skymaze level generation is now restricted to produce only 100000 distinct levels. This allows for caching to avoid expensive recompilations.
14. Add cvars 'cg_drawScriptRectanglesAlways' and 'cg_drawScriptTextAlways' to enable script rendering when reducedUI or minimalUI is enabled.
15. All pickup types can now choose their movement type separately, and in particular, all pickup types can be made static. Two separate table entries are now specified for an item, 'typeTag' and 'moveType'.

Deprecated Features:

1. Observation format names RGB_INTERLEAVED and RGBD_INTERLEAVED replace RGB_INTERLACED and RGBD_INTERLACED, respectively. The old format names are deprecated and will be removed in a future release.
2. The pickup item's tag member is now called moveType. The old name is deprecated and will be removed in a future release.

release-2018-02-07 February 2018 release

New Levels:

1. DMLab-30.

   1. contributed/dmlab30/rooms_collect_good_objects_{test,train}
   2. contributed/dmlab30/rooms_exploit_deferred_effects_{test,train}
   3. contributed/dmlab30/rooms_select_nonmatching_object
   4. contributed/dmlab30/rooms_watermaze
   5. contributed/dmlab30/rooms_keys_doors_puzzle
   6. contributed/dmlab30/language_select_described_object
   7. contributed/dmlab30/language_select_located_object
   8. contributed/dmlab30/language_execute_random_task
   9. contributed/dmlab30/language_answer_quantitative_question
   10. contributed/dmlab30/lasertag_one_opponent_small
   11. contributed/dmlab30/lasertag_three_opponents_small
   12. contributed/dmlab30/lasertag_one_opponent_large
   13. contributed/dmlab30/lasertag_three_opponents_large
   14. contributed/dmlab30/natlab_fixed_large_map
   15. contributed/dmlab30/natlab_varying_map_regrowth
   16. contributed/dmlab30/natlab_varying_map_randomized
   17. contributed/dmlab30/skymaze_irreversible_path_hard
   18. contributed/dmlab30/skymaze_irreversible_path_varied
   19. contributed/dmlab30/psychlab_sequential_comparison
   20. contributed/dmlab30/psychlab_visual_search
   21. contributed/dmlab30/explore_object_locations_small
   22. contributed/dmlab30/explore_object_locations_large
   23. contributed/dmlab30/explore_obstructed_goals_small
   24. contributed/dmlab30/explore_obstructed_goals_large
   25. contributed/dmlab30/explore_goal_locations_small
   26. contributed/dmlab30/explore_goal_locations_large
   27. contributed/dmlab30/explore_object_rewards_few
   28. contributed/dmlab30/explore_object_rewards_many

New Features:

1. Basic support for demo recording and playback.

Minor Improvements:

1. Add a mechanism to build DeepMind Lab as a PIP package.
2. Extend basic testing to all levels under game_scripts/levels.
3. Add settings minimalUI and reducedUI to avoid rendering parts of the HUD.
4. Add teleported flag to game:playerInfo() to tell whether a player has teleported that frame.
5. Add Lua functions countEntities and countVariations to the maze generation API to count the number of occurrences of a specific entity or variation, respectively.
6. Add ability to switch/select gadget via actions. Actions are available when enabling flags gadgetSelect and/or gadgetSwitch.

Bug Fixes:

1. Fix out-of-bounds access in Lua 'image' library.
2. Fix off-by-one error in renderergl1 grid mesh rendering.

release-2018-01-26 January 2018 release

New Levels:

1. Psychlab, a platform for implementing classical experimental paradigms from cognitive psychology.

   1. contributed/psychlab/sequential_comparison
   2. contributed/psychlab/visual_search

New Features:

1. Extend functionality of the built-in tensor Lua library.
2. Add built-in image Lua library for loading and scaling PNGs.
3. Add error handling to the env_c_api (version 1.1).
4. Add ability to create events from Lua scripts.
5. Add ability to retrieve game entity from Lua scripts.
6. Add ability create pickup models during level load.
7. Add ability to update textures from script after the level has loaded.
8. Add Lua customisable themes. Note: This change renames helpers in maze_generation to be in lowerCamelCase (e.g. MazeGeneration -> mazeGeneration).
9. The directory game_scripts has moved out of the assets directory, and level scripts now live separately from the library code in the levels subdirectory.

Minor Improvements:

1. Remove unnecessary dependency of map assets on Lua scripts, preventing time-consuming rebuilding of maps when scripts are modified.
2. Add ability to disable bobbing of reward and goal pickups.
3. The setting controls (with values internal, external) has been renamed to nativeApp (with values true, false, respectively). When set to true, programs linked against game_lib_sdl will use the native SDL input devices.
4. Change LuaSnippetEmitter methods to use table call conventions.
5. Add config variable for monochromatic lightmaps ('r_monolightmaps'). Enabled by default.
6. Add config variable to limit texture size ('r_textureMaxSize').
7. api:modifyTexture must now return whether the texture was modified.
8. Add ability to adjust rewards.
9. Add ability to raycast between different points on the map.
10. Add ability to test whether a view vector is within an angle range within a oriented view frame.

Bug Fixes:

1. Increase current score storage from short to long.
2. Fix ramp jump velocity in level lt_space_bounce_hard.
3. Fix Lua function 'addScore' from module 'dmlab.system.game' to allow negative scores added to a player.
4. Remove some undefined behaviour in the engine.
5. Reduce inaccuracies related to angle conversion and normalization.
6. Behavior of team spawn points now matches that of player spawn points. 'randomAngleRange' spawnVar must be set to 0 to match previous behavior.

release-2016-12-06 Initial release