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simulate.py
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import argparse
import random
import sys
import sdl2
import sdl2.ext as lib
import sdl2.sdlgfx as gfx
import tensorflow as tf
import numpy as np
from rlsnake.game.snake import Snake
from rlsnake.networks.actor_critic import ActorCriticNetwork
from rlsnake.agents.tfagent import TfAgent
parser = argparse.ArgumentParser(description='Simulate a snake match using an agent')
parser.add_argument('--x', type=int, default=4, metavar='X',
help='number of tiles in horizontal direction (default: 4)')
parser.add_argument('--y', type=int, default=4, metavar='Y',
help='number of tiles in vertical direction (default: 4)')
parser.add_argument('--visibility-range', type=int, default=4, metavar='VR',
help='visibility range in each direction for the snake (default: 4)')
parser.add_argument('--seed', type=int, default=42, metavar='N',
help='random seed (default: 42)')
parser.add_argument('--neurons', type=int, default=512, metavar='NE',
help='how many neurons in each layer (default: 512)')
parser.add_argument('--model-path', type=str, default='./model.pt', metavar='MP',
help='path to trained model (default: ./model.pt)')
parser.add_argument('--sleep', type=int, default=100, metavar='MP',
help='how long to sleep between frames/steps')
parser.add_argument('--autoplay', dest='autoplay', action='store_const',
const=True, default=False,
help='automatically play in an endless loop')
args = parser.parse_args()
np.random.seed(args.seed)
tf.random.set_seed(args.seed)
random.seed(args.seed)
n_grid_x = args.x
n_grid_y = args.y
window_width = 800 + 1
grid_cell_size = int(800/n_grid_x)
window_height = n_grid_y*grid_cell_size + 1
COLOR_SNAKE = sdl2.ext.Color(255, 100, 100)
COLOR_SNAKE_EATEN = sdl2.ext.Color(100, 255, 100)
COLOR_SNAKE_HEAD = sdl2.ext.Color(255, 140, 140)
COLOR_SNAKE_HEAD_EATEN = sdl2.ext.Color(140, 255, 140)
COLOR_SNAKE_GAME_OVER = sdl2.ext.Color(100, 100, 100)
COLOR_FOOD = sdl2.ext.Color(100, 255, 100)
COLOR_VIEW_RANGE = sdl2.ext.Color(100, 100, 255, 50)
MAX_MOVES = 500
def draw_grid(renderer):
x = 0
while x < 1 + n_grid_x * grid_cell_size:
renderer.draw_line([x, 0, x, window_height], lib.Color(255,255,255))
x += grid_cell_size
y = 0
while y < 1 + n_grid_y * grid_cell_size:
renderer.draw_line([0, y, window_width, y], lib.Color(255,255,255))
y += grid_cell_size
def fill_tile(renderer, x, y, color=lib.Color(255,255,255)):
blendmode = renderer.blendmode
renderer.blendmode = sdl2.blendmode.SDL_BLENDMODE_ADD
renderer.fill(((x*grid_cell_size+1, y*grid_cell_size+1, grid_cell_size-1, grid_cell_size-1)), color=color)
renderer.blendmode = blendmode
def fill_circle(renderer, x, y, color=lib.Color(255, 255, 255)):
gfx.filledCircleRGBA(renderer.sdlrenderer, x*grid_cell_size+int(grid_cell_size/2)+1, y*grid_cell_size+int(grid_cell_size/2)+1, int(grid_cell_size/4), color.r, color.g, color.b, color.a)
def run():
lib.init()
window = lib.Window('RLSnake', size=(window_width, window_height))
window.show()
renderer = lib.Renderer(window)
fontManager = sdl2.ext.FontManager(font_path = "assets/fonts/Roboto-Regular.ttf", size = 14)
factory = sdl2.ext.SpriteFactory(renderer=renderer)
text = factory.from_text("Current score: ",fontmanager=fontManager)
snake = Snake(n_grid_x, n_grid_y)
snake.set_visibility_range(args.visibility_range)
snake.reset()
network = ActorCriticNetwork(4, fc1_dims=args.neurons, fc2_dims=args.neurons)
agent = TfAgent(network)
agent.load_weights(args.model_path)
autoplay = args.autoplay
moves = 0
running = True
game_over = False
old_score = 0
current_tiles = snake.get_tiles()
while running:
events = sdl2.ext.get_events()
for event in events:
if event.type == sdl2.SDL_QUIT:
running = False
break
if event.type == sdl2.SDL_KEYDOWN:
if event.key.keysym.sym == sdl2.SDLK_ESCAPE:
running = False
break
if event.key.keysym.sym == 112:
autoplay = not autoplay
if event.key.keysym.sym == 114:
snake.reset()
moves = 0
old_score = 0
game_over = False
current_tiles = snake.get_tiles()
break
if not game_over:
if not autoplay:
if event.key.keysym.sym == sdl2.SDLK_SPACE:
action = agent.get_action(snake.get_view_obs())
_, game_over, _ = snake.step(action)
current_tiles = snake.get_tiles()
moves += 1
if autoplay:
action = agent.get_action(snake.get_view_obs())
_, game_over, _ = snake.step(action)
current_tiles = snake.get_tiles()
moves += 1
renderer.clear(sdl2.ext.Color(0, 0, 0))
draw_grid(renderer)
for x in range(len(current_tiles)):
for y in range(len(current_tiles[x])):
tile = current_tiles[x][y]
if tile == 0:
continue
if tile == 1:
continue
if tile == 2:
if game_over:
fill_tile(renderer, int(x), int(y), COLOR_SNAKE_GAME_OVER)
else:
if snake.get_score() > old_score:
fill_tile(renderer, int(x), int(y), COLOR_SNAKE_EATEN)
else:
fill_tile(renderer, int(x), int(y), COLOR_SNAKE)
if tile == 4:
if game_over:
fill_tile(renderer, int(x), int(y), COLOR_SNAKE_GAME_OVER)
else:
if snake.get_score() > old_score:
fill_tile(renderer, int(x), int(y), COLOR_SNAKE_HEAD_EATEN)
else:
fill_tile(renderer, int(x), int(y), COLOR_SNAKE_HEAD)
if tile == 3:
fill_circle(renderer, int(x), int(y), COLOR_FOOD)
for tile in snake.get_current_view():
fill_tile(renderer, int(tile[0]), int(tile[1]), COLOR_VIEW_RANGE)
if snake.get_score() > old_score:
old_score = snake.get_score()
text = factory.from_text("Current score: " + str(snake.get_score()), fontmanager=fontManager)
renderer.copy(text, dstrect=(0, 0, text.size[0],text.size[1]))
if autoplay:
text = factory.from_text("Move: " + str(moves) + " / " + str(MAX_MOVES), fontmanager=fontManager)
else:
text = factory.from_text("Move: " + str(moves), fontmanager=fontManager)
renderer.copy(text, dstrect=(0, 14, text.size[0],text.size[1]))
renderer.present()
sdl2.SDL_Delay(args.sleep)
if autoplay and (game_over or moves >= MAX_MOVES):
snake.reset()
moves = 0
old_score = 0
game_over = False
return 0
if __name__ == "__main__":
sys.exit(run())