1  # SPDX-FileCopyrightText: 2018 Dave Astels for Adafruit Industries
 2  #
 3  # SPDX-License-Identifier: MIT
 4  
 5  """
 6  FlappyBird type game for the NeoTrellisM4
 7  
 8  Adafruit invests time and resources providing this open source code.
 9  Please support Adafruit and open source hardware by purchasing
10  products from Adafruit!
11  
12  Written by Dave Astels for Adafruit Industries
13  Copyright (c) 2018 Adafruit Industries
14  Licensed under the MIT license.
15  
16  All text above must be included in any redistribution.
17  """
18  
19  # pylint: disable=wildcard-import,unused-wildcard-import,eval-used
20  
21  from color_names import *
22  
23  
24  class Post(object):
25      """Obstacles the user must avoice colliding with."""
26  
27      def __init__(self, from_bottom=0, from_top=0):
28          """Initialize a Post instance.
29          from_bottom -- how far the post extends from the bottom of the screen (default 0)
30          from_top    -- how far the post extends from the top of the screen (default 0)
31          """
32          self._x = 7
33          self._top = from_top
34          self._bottom = from_bottom
35  
36      def update(self):
37          """Periodic update: move one step to the left."""
38          self._x -= 1
39  
40      def _on_post(self, x, y):
41          """Determine whether the supplied coordinate is occupied by part of this post.
42          x -- the horizontal pixel coordinate
43          y -- the vertical pixel coordinate
44          """
45          return x == self._x and (y < self._top or y > (3 - self._bottom))
46  
47      def draw_on(self, trellis):
48          """Draw this post on the screen.
49          trellis -- the TrellisM4Express instance to use as a screen
50          """
51          for i in range(4):
52              if self._on_post(self._x, i):
53                  trellis.pixels[self._x, i] = GREEN
54  
55      def is_collision_at(self, x, y):
56          """Determine whether something at the supplied coordinate is colliding with this post.
57          x -- the horizontal pixel coordinate
58          y -- the vertical pixel coordinate
59          """
60          return self._on_post(x, y)
61  
62      @property
63      def off_screen(self):
64          """Return whether this post has moved off the left edge of the screen."""
65          return self._x < 0