1 | """Display a game area."""
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2 |
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3 | import pygame
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4 | import pymunk
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5 | import pymunk.pygame_util
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6 |
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7 | from nagslang.events import ScreenChange
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8 | from nagslang.level import Level
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9 | from nagslang.protagonist import Protagonist
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10 | from nagslang.screens.base import Screen
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11 |
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12 |
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13 | class ControlKeys(object):
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14 | def __init__(self):
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15 | self.keys_down = set()
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16 |
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17 | def key_down(self, key):
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18 | self.keys_down.add(key)
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19 |
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20 | def key_up(self, key):
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21 | self.keys_down.discard(key)
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22 |
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23 | def handle_event(self, ev):
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24 | if ev.type == pygame.locals.KEYDOWN:
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25 | self.key_down(ev.key)
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26 | elif ev.type == pygame.locals.KEYUP:
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27 | self.key_up(ev.key)
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28 |
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29 |
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30 | class AreaScreen(Screen):
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31 |
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32 | def setup(self):
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33 | self.keys = ControlKeys()
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34 | self._level = Level(self.name)
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35 | self._level.load()
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36 | self.add_walls()
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37 | self.add_protagonist()
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38 |
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39 | def add_walls(self):
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40 | self.walls = []
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41 | body = pymunk.Body()
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42 | body.position = (0, -300)
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43 | walls = self._level.get_walls()
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44 | for wall in walls:
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45 | corners = wall
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46 | corner = corners[-1]
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47 | for next_corner in corners:
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48 | wall = pymunk.Segment(body, corner, next_corner, 5)
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49 | wall.elasticity = 1.0
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50 | self.walls.append(wall)
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51 | corner = next_corner
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52 | self.space.add(*self.walls)
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53 |
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54 | def add_protagonist(self):
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55 | self.protagonist = Protagonist((400, 300))
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56 | self.protagonist.add_to_space(self.space)
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57 |
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58 | def handle_event(self, ev):
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59 | if ev.type == pygame.locals.KEYDOWN:
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60 | if ev.key == pygame.locals.K_ESCAPE:
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61 | ScreenChange.post('menu')
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62 | if ev.key == pygame.locals.K_w:
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63 | self.protagonist.toggle_form()
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64 | self.keys.handle_event(ev)
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65 |
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66 | def render(self, surface):
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67 | #surface.fill(pygame.color.Color(0, 0, 0))
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68 | background = self._level.get_background()
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69 | surface.blit(background, (0, 0))
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70 | #pymunk.pygame_util.draw(surface, *self.walls)
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71 | self.protagonist.render(surface)
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72 |
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73 | def tick_protagonist(self):
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74 | dx, dy = 0, 0
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75 | for key, tx, ty in [
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76 | (pygame.locals.K_UP, 0, 1), (pygame.locals.K_DOWN, 0, -1),
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77 | (pygame.locals.K_LEFT, -1, 0), (pygame.locals.K_RIGHT, 1, 0)
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78 | ]:
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79 | if key in self.keys.keys_down:
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80 | dx += tx
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81 | dy += ty
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82 | self.protagonist.set_direction(dx, dy)
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83 |
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84 | def tick(self, seconds):
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85 | self.tick_protagonist()
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86 | super(AreaScreen, self).tick(seconds)
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