def test_random_actions(self):
num_envs = 100
num_steps = 100
obs_h = 5
obs_w = 5
obs_fn = observations.FirstPersonCrop(obs_h, obs_w)
# Create some environments and run random actions for N steps, checking for consistency at each step
env = Slither(num_envs=num_envs, num_agents=2, height=size, width=size, manual_setup=False, verbose=True,
render_args={'num_rows': 5, 'num_cols': 5, 'size': 128}, observation_fn=obs_fn
)
env.check_consistency()
all_actions = {
'agent_0': torch.randint(4, size=(num_steps, num_envs)).long().to(DEFAULT_DEVICE),
'agent_1': torch.randint(4, size=(num_steps, num_envs)).long().to(DEFAULT_DEVICE),
}
t0 = time()
for i in range(all_actions['agent_0'].shape[0]):
actions = {
agent: agent_actions[i] for agent, agent_actions in all_actions.items()
}
obs, reward, done, info = env.step(actions)
env.reset(done['__all__'])
env.check_consistency()
print()
t = time() - t0
print(f'Ran {num_envs * num_steps} actions in {t}s = {num_envs * num_steps / t} actions/s')
def test_random_actions_with_boost(self):
# num_envs = 1024*8
num_envs = 256
num_steps = 200
num_snakes = 4
obs_h = 5
obs_w = 5
obs_fn = observations.FirstPersonCrop(obs_h, obs_w)
# Create some environments and run random actions for N steps, checking for consistency at each step
env = Slither(num_envs=num_envs, num_agents=num_snakes, height=25, width=25, manual_setup=False, boost=True,
verbose=True, render_args={'num_rows': 1, 'num_cols': 2, 'size': 256},
respawn_mode='any', food_mode='random_rate', boost_cost_prob=0.25,
observation_fn=obs_fn, food_on_death_prob=0.33, food_rate=2.5e-4
)
env.check_consistency()
all_actions = {
f'agent_{i}': torch.randint(8, size=(num_steps, num_envs)).long().to(DEFAULT_DEVICE) for i in
range(num_snakes)
}
t0 = time()
for i in range(all_actions['agent_0'].shape[0]):
actions = {
agent: agent_actions[i] for agent, agent_actions in all_actions.items()
}
obs, reward, done, info = env.step(actions)
env.reset(done['__all__'], return_observations=False)
env.check_consistency()
print()
t = time() - t0
print(f'Ran {num_envs * num_steps} actions in {t}s = {num_envs * num_steps / t} actions/s')
def test_create_envs(self):
# Create a large number of environments and check consistency
env = Slither(num_envs=512, num_agents=2, height=size, width=size, manual_setup=False)
env.check_consistency()
_envs = torch.cat([
env.foods.repeat_interleave(env.num_agents, dim=0),
env.agents,
env.bodies
], dim=1)
orientations = determine_orientations(_envs)
self.assertTrue(torch.equal(env.orientations, orientations))
def test_partial_observations(self):
num_envs = 256
num_snakes = 4
obs_h = 5
obs_w = 5
obs_fn = observations.FirstPersonCrop(obs_h, obs_w)
env = Slither(num_envs=num_envs, num_agents=num_snakes, height=25, width=25, manual_setup=False, boost=True,
observation_fn=obs_fn,
render_args={'num_rows': 1, 'num_cols': 2, 'size': 256},
)
env.check_consistency()
# render_envs = True
agent_obs = env._observe()
if render_envs:
# if True:
fig, axes = plt.subplots(2, 2)
i = 0
# Show all the observations of the agent in the first env
for k, v in agent_obs.items():
axes[i // 2, i % 2].imshow(v[0].permute(1, 2, 0).cpu().numpy())
i += 1
plt.show()
env.render()
sleep(5)
def test_many_snakes(self):
num_envs = 50
num_steps = 10
num_snakes = 4
env = Slither(num_envs=num_envs, num_agents=num_snakes, height=size, width=size, manual_setup=False, boost=True)
env.check_consistency()
all_actions = {
f'agent_{i}': torch.randint(8, size=(num_steps, num_envs)).long().to(DEFAULT_DEVICE) for i in range(num_snakes)
}
for i in range(all_actions['agent_0'].shape[0]):
# env.render()
actions = {
agent: agent_actions[i] for agent, agent_actions in all_actions.items()
}
obs, reward, done, info = env.step(actions)
env.reset(done['__all__'])
env.check_consistency()
def get_env(args: argparse.Namespace, observation_fn: ObservationFunction, device: str):
if args.env is None:
raise ValueError('args.env is None.')
render_args = {
'size': args.render_window_size,
'num_rows': args.render_rows,
'num_cols': args.render_cols,
}
# Pre-process map name (kind of a hack to help identify which "small2" map we're
# referring to in the arguments)
args.env_map = [f'{args.env}-{m}' for m in args.env_map]
if args.env == 'snake':
args.env_map = [f'snake-{m}' for m in args.env_map]
env = Slither(num_envs=args.n_envs, num_agents=args.n_agents, food_on_death_prob=args.food_on_death,
height=args.height, width=args.width, device=device, render_args=render_args,
boost=args.boost,
boost_cost_prob=args.boost_cost, food_rate=args.food_rate,
respawn_mode=args.respawn_mode, food_mode=args.food_mode, observation_fn=observation_fn,
reward_on_death=args.reward_on_death, agent_colours=args.colour_mode)
elif args.env == 'laser':
if len(args.env_map) == 1:
if args.env_map[0] == 'random':
# Generate n_maps random mazes to select from at random during each map reset
map_generator = Random(args.n_respawns, args.height, args.width, args.maze_complexity,
args.maze_density, args.device)
elif args.env_map[0] == 'from_file':
maps = maps_from_file(args.pathing_file, args.respawn_file, args.device, args.n_maps)
map_generator = MapPool(maps)
else:
# Single fixed map
map_generator = FixedMapGenerator(parse_mapstring(args.env_map[0]), device)
else:
fixed_maps = [parse_mapstring(m) for m in args.env_map]
map_generator = MapPool(fixed_maps)
env = LaserTag(num_envs=args.n_envs, num_agents=args.n_agents, height=args.height, width=args.width,
observation_fn=observation_fn, colour_mode=args.colour_mode,
map_generator=map_generator, device=device, render_args=render_args, strict=args.strict)
elif args.env == 'harvest':
if len(args.env_map) == 1:
if args.env_map[0] == 'random':
# Generate n_maps random mazes to select from at random during each map reset
map_generator = Random(args.n_respawns, args.height, args.width, args.maze_complexity,
args.maze_density, args.device)
elif args.env_map[0] == 'from_file':
maps = maps_from_file(args.pathing_file, args.respawn_file, args.device, args.n_maps,
other_tensors={'harvest': args.harvest_file})
map_generator = MapPool(maps)
else:
# Single fixed map
map_generator = FixedMapGenerator(parse_mapstring(args.env_map[0]), device)
else:
fixed_maps = [parse_mapstring(m) for m in args.env_map]
map_generator = MapPool(fixed_maps)
env = Harvest(num_envs=args.n_envs, num_agents=args.n_agents, height=args.height, width=args.width,
observation_fn=observation_fn, colour_mode=args.colour_mode, refresh_rate=args.harvest_refresh,
map_generator=map_generator, device=device, render_args=render_args, strict=args.strict)
elif args.env == 'asymmetric':
raise NotImplementedError
else:
raise ValueError('Unrecognised environment')
return env
def test_cant_boost_until_size_4(self):
# Create a size 3 snake and try boosting with it
env = Slither(num_envs=1, num_agents=2, height=size, width=size, manual_setup=True, boost=True)
env.foods[:, 0, 1, 1] = 1
# Snake 1
env.agents[0, 0, 5, 5] = 1
env.bodies[0, 0, 5, 5] = 3
env.bodies[0, 0, 4, 5] = 2
env.bodies[0, 0, 4, 4] = 1
# Snake 2
env.agents[1, 0, 8, 7] = 1
env.bodies[1, 0, 8, 7] = 3
env.bodies[1, 0, 8, 8] = 2
env.bodies[1, 0, 8, 9] = 1
# Get orientations manually
_envs = torch.cat([
env.foods.repeat_interleave(env.num_agents, dim=0),
env.agents,
env.bodies
], dim=1)
env.orientations = determine_orientations(_envs)
expected_head_positions = torch.tensor([
[6, 5],
[6, 4],
[5, 4],
])
all_actions = {
'agent_0': torch.tensor([4, 1, 2]).unsqueeze(1).long().to(DEFAULT_DEVICE),
'agent_1': torch.tensor([0, 1, 3]).unsqueeze(1).long().to(DEFAULT_DEVICE),
}
print_or_render(env)
for i in range(all_actions['agent_0'].shape[0]):
actions = {
agent: agent_actions[i] for agent, agent_actions in all_actions.items()
}
obs, rewards, dones, info = env.step(actions)
env.reset(dones['__all__'])
env.check_consistency()
for i_agent in range(env.num_agents):
_env = torch.cat([
env.foods,
env.agents[i_agent].unsqueeze(0),
env.bodies[i_agent].unsqueeze(0)
], dim=1)
head_position = torch.tensor([
head(_env)[0, 0].flatten().argmax() // size, head(_env)[0, 0].flatten().argmax() % size
])
if i_agent == 0:
self.assertTrue(torch.equal(expected_head_positions[i], head_position))
print_or_render(env)
def get_test_env(num_envs=1):
env = Slither(num_envs=num_envs, num_agents=2, height=size, width=size, manual_setup=True)
for i in range(num_envs):
# Snake 1
env.agents[2 * i, 0, 5, 5] = 1
env.bodies[2*i, 0, 5, 5] = 4
env.bodies[2*i, 0, 4, 5] = 3
env.bodies[2*i, 0, 4, 4] = 2
env.bodies[2*i, 0, 4, 3] = 1
# Snake 2
env.agents[2 * i + 1, 0, 8, 7] = 1
env.bodies[2*i+1, 0, 8, 7] = 4
env.bodies[2*i+1, 0, 8, 8] = 3
env.bodies[2*i+1, 0, 8, 9] = 2
env.bodies[2*i+1, 0, 9, 9] = 1
_envs = torch.cat([
env.foods.repeat_interleave(env.num_agents, dim=0),
env.agents,
env.bodies
], dim=1)
env.orientations = determine_orientations(_envs)
print(env.orientations)
return env