118 lines
4.0 KiB
Lua
118 lines
4.0 KiB
Lua
local preset = rawget(_G, 'preset')
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preset = preset ~= nil and preset ~= '' and preset or 'ars'
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local defaults = {
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-- read-only modes:
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playable_mode = false,
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playback_mode = false,
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-- controlling in-game mechanics:
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starting_world = 1, -- set to 0 to randomize the world every epoch.
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starting_level = 1, -- set to 0 to randomize the level every epoch.
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start_big = false,
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starting_lives = 0,
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min_time = 100,
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max_time = 300,
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timer_loser = 1/2, -- decrement the timer when mario is slacking off.
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-- rewards:
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decrement_reward = false, -- bad idea, encourages mario to run into goombas.
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score_multiplier = 1, -- how much the ingame score influences our rewards.
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-- network initialization:
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init_zeros = false, -- instead of random normal noise.
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-- network inputs (connections):
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time_inputs = true, -- insert binary inputs of a frame counter.
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-- network layers:
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hidden = false, -- use a hidden layer with ReLU/GELU activation.
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hidden_size = 128,
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layernorm = false, -- use a LayerNorm layer after said activation.
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reduce_tiles = false,
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bias_out = true,
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-- network evaluation (sampling joypad):
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frameskip = 4,
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-- true greedy epsilon has both deterministic and det_epsilon set.
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deterministic = false, -- use argmax on outputs instead of random sampling.
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det_epsilon = false, -- take random actions with probability eps.
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-- evolution strategy and non-rate hyperparemeters:
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es = 'ars',
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ars_lips = false, -- for ARS.
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epoch_top_trials = 9999, -- for ARS.
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-- sampling:
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deviation = 1.0,
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unperturbed_trial = true, -- perform an extra trial without any noise.
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-- this is good for logging, so i'd recommend it.
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epoch_trials = 50,
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graycode = false, -- for ARS.
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negate_trials = true, -- try pairs of normal and negated noise directions.
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-- AKA antithetic sampling. note that this doubles the number of trials.
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min_refresh = 0.1, -- for SNES.
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-- epoch-related rates:
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base_rate = 1.0, -- param_rate, sigma_rate, and covar_rate will base on this
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-- if you don't specify them individually.
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param_decay = 0.0,
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sigma_decay = 0.0, -- for SNES, xNES.
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momentum = 0.0, -- for ARS.
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}
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local presets = require("presets")
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for _, cfg in pairs(presets) do
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local parent = defaults
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if cfg.parent ~= nil then
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parent = presets[cfg.parent]
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assert(parent, "no such parent preset: "..tostring(cfg.parent))
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end
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setmetatable(cfg, {__index=parent})
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end
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local cfg = presets[preset]
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assert(cfg, "invalid preset: "..tostring(preset))
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-- TODO: so, uhh..
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-- what happens when playback_mode is true but unperturbed_trial is false?
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if cfg.es == 'ars' then
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if cfg.param_rate == nil then cfg.param_rate = cfg.base_rate end
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else
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if cfg.param_rate == nil then cfg.param_rate = 1.0 end
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end
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if cfg.sigma_rate == nil then cfg.sigma_rate = cfg.base_rate end
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if cfg.covar_rate == nil then cfg.covar_rate = cfg.sigma_rate end
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local parent = getmetatable(cfg).__index
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setmetatable(cfg, {
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__index = function(t, n)
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if parent ~= nil and parent[n] ~= nil then return parent[n] end
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if n == 'name' then return nil end
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if n == 'log_fn' then return nil end
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if n == 'params_fn' then return nil end
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if n == 'stats_fn' then return nil end
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error("cannot use undeclared config '" .. tostring(n) .. "'", 2)
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end
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})
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cfg.epoch_top_trials = math.min(cfg.epoch_trials, cfg.epoch_top_trials)
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cfg.eps_start = 1.0 * cfg.frameskip / 64
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cfg.eps_stop = 0.1 * cfg.eps_start
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cfg.eps_frames = 1000000
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cfg.enable_overlay = cfg.playable_mode
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cfg.enable_network = not cfg.playable_mode
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assert(not cfg.ars_lips or cfg.unperturbed_trial,
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"cfg.unperturbed_trial must be true to use cfg.ars_lips")
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assert(not cfg.ars_lips or cfg.negate_trials,
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"cfg.negate_trials must be true to use cfg.ars_lips")
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assert(not (cfg.es == 'snes' and cfg.negate_trials),
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"cfg.negate_trials is not yet compatible with SNES")
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return cfg
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