From e972d4ddb37cede87215591a90b587b7666d1df8 Mon Sep 17 00:00:00 2001
From: Peter Ward <peteraward@gmail.com>
Date: Tue, 29 Sep 2009 18:51:59 +1000
Subject: Separated out snake and pygame code.

---
 pygame_snake.py | 137 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 137 insertions(+)
 create mode 100755 pygame_snake.py

(limited to 'pygame_snake.py')

diff --git a/pygame_snake.py b/pygame_snake.py
new file mode 100755
index 0000000..d1639aa
--- /dev/null
+++ b/pygame_snake.py
@@ -0,0 +1,137 @@
+#!/usr/bin/env python
+
+from __future__ import division
+
+import time
+
+import pygame
+pygame.init()
+from pygame.locals import *
+
+from snake import SnakeEngine
+
+def scale_aspect((source_width, source_height), (target_width, target_height)):
+    source_aspect = source_width / source_height
+    target_aspect = target_width / target_height
+    if source_aspect > target_aspect:
+        # restrict width
+        width = target_width
+        height = width / source_aspect
+    else:
+        # restrict height
+        height = target_height
+        width = height * source_aspect
+    return (width, height)
+
+class PygameSnakeEngine(SnakeEngine):
+    EDGE_COLOR = (255, 255, 255)
+    EDGE_WIDTH = 1
+
+    def __init__(self, rows, columns, n_apples, width=800, height=600, fullscreen=False):
+        flags = 0
+        if fullscreen:
+            flags |= pygame.FULLSCREEN
+        self.screen = pygame.display.set_mode((width, height), flags)
+
+        self.width = width
+        self.height = height
+
+        super(PygameSnakeEngine, self).__init__(rows, columns, n_apples)
+
+    def new_game(self, rows, columns, n_apples):
+        super(PygameSnakeEngine, self).new_game(rows, columns, n_apples)
+
+        # make board surface
+        self.board_width, self.board_height = scale_aspect(
+            (columns, rows), (self.width, self.height)
+        )
+        self.surface = pygame.Surface((self.board_width, self.board_height))
+
+        # load sprites
+        xscale = self.board_width / self.columns
+        yscale = self.board_height / self.rows
+
+        def load_image(image):
+            new_size = scale_aspect(image.get_size(), (xscale, yscale))
+            return pygame.transform.smoothscale(image, new_size)
+
+        self.apple = load_image(Sprites.APPLE)
+        self.eyes = load_image(Sprites.EYES)
+
+    def draw_board(self):
+        xscale = self.board_width / self.columns
+        yscale = self.board_height / self.rows
+
+        # Draw grid.
+        for y, row in enumerate(self.board):
+            for x, cell in enumerate(row):
+                left = int(x * xscale)
+                top = int(y * yscale)
+                w = int((x + 1) * xscale) - left
+                h = int((y + 1) * yscale) - top
+                r = Rect(left, top, w, h)
+
+                # Draw a square.
+                pygame.draw.rect(self.surface, self.EDGE_COLOR, r,
+                                 self.EDGE_WIDTH)
+
+                # Draw the things on the square.
+                if cell == Squares.APPLE:
+                    self.surface.blit(self.apple, r.topleft)
+
+                elif cell.isalpha(): # Snake...
+                    colour = self.bots[cell.lower()][1]
+                    self.surface.fill(colour, r)
+
+                    if cell.isupper(): # Snake head
+                        self.surface.blit(self.eyes, r.topleft)
+
+    def run(self):
+        clock = pygame.time.Clock()
+
+        running = True
+        while running and self.bots:
+            for event in pygame.event.get():
+                if event.type == pygame.QUIT or \
+                   (event.type == pygame.KEYDOWN and event.key == K_ESCAPE):
+                    running = False
+                    break
+            if not running: break
+
+            # Clear the screen.
+            self.screen.fill((0, 0, 0))
+            self.surface.fill((0, 0, 0))
+
+            # Draw the board.
+            self.draw_board()
+
+            # Center the board.
+            x = (self.width - self.board_width) / 2
+            y = (self.height - self.board_height) / 2
+            self.screen.blit(self.surface, (x, y))
+
+            # Update the display.
+            pygame.display.flip()
+            clock.tick(20)
+
+            # Let the snakes move!
+            self.update_snakes()
+
+        if running:
+            time.sleep(2)
+
+        # Early window close, late process cleanup.
+        pygame.display.quit()
+
+if __name__ == '__main__':
+    from bots import *
+    from oldbot import BotWrapper
+
+    game = PygameSnakeEngine(25, 25, 50)
+    game.add_bot(right_bot)
+    game.add_bot(random_bot)
+    game.add_bot(random_bounds_bot)
+    game.add_bot(random_square_bot)
+    game.add_bot(BotWrapper('oldbots/peter.py'))
+    game.run()
+
-- 
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