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annotate nagslang/render.py @ 378:8069c9be1c3e

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Create a nagslang.collectable module for collectables
author Stefano Rivera <stefano@rivera.za.net>
date Fri, 06 Sep 2013 23:07:27 +0200
parents d0aeb893967d
children 8a65fd894f73
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1 import math
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2
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3 import pygame
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4 import pygame.locals as pgl
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5 import pymunk
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6
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7 from nagslang.options import options
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8 from nagslang.utils import tile_surface
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9 from nagslang.widgets.text import LabelWidget
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10
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11
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12 class Renderer(object):
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13 def set_game_object(self, game_object):
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14 self.game_object = game_object
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15
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16 def _render_shape(self, surface):
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17 shape = self.game_object.get_shape()
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18 # Less general that pymunk.pygame_util.draw, but also a lot less noisy.
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19 color = getattr(shape, 'color', pygame.color.THECOLORS['lightblue'])
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20 # We only explicitly draw Circle and Poly shapes. Everything else we
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21 # forward to pymunk.
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22 if isinstance(shape, pymunk.Circle):
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23 centre = pymunk.pygame_util.to_pygame(shape.body.position, surface)
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24 radius = int(shape.radius)
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25 pygame.draw.circle(surface, color, centre, radius, 2)
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26 elif isinstance(shape, pymunk.Poly):
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27 # polygon bounding box
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28 points = [pymunk.pygame_util.to_pygame(p, surface)
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29 for p in shape.get_vertices()]
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30 pygame.draw.lines(surface, color, True, points, 2)
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31 else:
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32 pymunk.pygame_util.draw(surface, shape)
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33
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34 def render(self, surface):
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35 if options.debug:
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36 self._render_shape(surface)
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37
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38 def update(self, seconds):
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39 # Used by time animatations to advance the clock
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40 pass
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41
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42
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43 class NullRenderer(Renderer):
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44 def render(self, surface):
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45 pass
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47
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48 def image_pos(image, pos):
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49 return (pos[0] - image.get_width() / 2,
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50 pos[1] - image.get_height() / 2)
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51
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52
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53 class ImageRenderer(Renderer):
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54 def __init__(self, image):
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55 self._image = image
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56
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57 def get_image(self):
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58 return self._image
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59
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60 def rotate_image(self, image):
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61 angle = self.game_object.get_render_angle() * 180 / math.pi
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62 return pygame.transform.rotate(image, angle)
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63
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64 def render_image(self, surface, image):
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65 image = self.rotate_image(image)
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66 pos = self.game_object.get_render_position(surface)
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67 surface.blit(image, image_pos(image, pos))
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68
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69 def render(self, surface):
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70 self.render_image(surface, self.get_image())
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71 super(ImageRenderer, self).render(surface)
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72
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73
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74 class ImageStateRenderer(ImageRenderer):
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75 def __init__(self, state_images):
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76 self._state_images = state_images
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77
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78 def get_image(self):
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79 return self._state_images[self.game_object.puzzler.get_state()]
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80
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81
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82 class TimedAnimatedRenderer(ImageRenderer):
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83 def __init__(self, images, frame_ticks=1):
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84 self._images = images
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85 self._frame_ticks = frame_ticks
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86 self._frame_tick = 0
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87 self._frame = 0
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88
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89 def advance_tick(self):
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90 self._frame_tick += 1
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91 if self._frame_tick > self._frame_ticks:
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92 self._frame_tick = 0
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93 self._frame += 1
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94 if self._frame >= len(self._images):
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95 self._frame = 0
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96
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97 def reset(self):
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98 self._frame_tick = 0
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99 self._frame = 0
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100
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101 def get_image(self):
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102 return self._images[self._frame]
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103
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104 def update(self, seconds):
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105 self.advance_tick()
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106
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107
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108 class MovementAnimatedRenderer(TimedAnimatedRenderer):
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109 def update(self, seconds):
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110 if self.game_object.is_moving:
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111 self.advance_tick()
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112 else:
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113 self.reset()
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114
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115
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116 class RendererSelectionRenderer(Renderer):
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117 def __init__(self, renderers):
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118 self._renderers = renderers
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119
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120 def set_game_object(self, game_object):
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121 self.game_object = game_object
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122 for renderer in self._renderers.values():
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123 renderer.set_game_object(game_object)
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124
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125 @property
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126 def renderer(self):
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127 return self._renderers[self.select_renderer()]
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128
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129 def render(self, surface):
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130 return self.renderer.render(surface)
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131
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132 def update(self, seconds):
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133 return self.renderer.update(seconds)
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134
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135 def select_renderer(self):
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136 raise NotImplementedError()
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137
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138
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139 class FacingSelectionRenderer(RendererSelectionRenderer):
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140 def select_renderer(self):
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141 return self.game_object.get_facing_direction()
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142
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143
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144 class ShapeRenderer(Renderer):
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145 def render(self, surface):
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146 self._render_shape(surface)
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147 super(ShapeRenderer, self).render(surface)
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148
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149
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150 class ShapeStateRenderer(ShapeRenderer):
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151 """Renders the shape in a different colour depending on the state.
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152
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153 Requires the game object it's attached to to have a puzzler.
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154 """
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155 def render(self, surface):
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156 if self.game_object.puzzler.get_state():
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157 color = pygame.color.THECOLORS['green']
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158 else:
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159 color = pygame.color.THECOLORS['red']
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160
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161 self.game_object.get_shape().color = color
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162 super(ShapeStateRenderer, self).render(surface)
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163
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164
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165 class Overlay(object):
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166 def set_game_object(self, game_object):
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167 self.game_object = game_object
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168
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169 def render(self, surface, display_offset):
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170 pass
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171
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172 def is_visible(self):
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173 return self.game_object.puzzler.get_state()
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174
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175
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176 class TextOverlay(Overlay):
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177 def __init__(self, text):
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178 self.text = text
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179 self.widget = LabelWidget((20, 20), self.text)
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180
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181 def render(self, surface, display_offset):
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182 x, y = 20, 20
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183 if display_offset[0] < 0:
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184 x += abs(display_offset[0])
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185 if display_offset[1] < 0:
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186 y += abs(display_offset[1])
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187 self.widget.rect.topleft = (x, y)
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188 self.widget.draw(surface)
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189
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190
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191 class TiledRenderer(Renderer):
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192 """Tile the given image to fit the given outline
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193
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194 Outline is assumed to be in pymunk coordinates"""
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195
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196 def __init__(self, outline, tile_image, alpha=255):
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197 self._tile_image = tile_image
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198 self.outline = outline
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199 self._tiled = None
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200 self._offset = None
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201 self._alpha = alpha
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202
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203 def _make_surface(self, surface):
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204 if not self._tiled:
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205 size = surface.get_size()
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206 mask = pygame.surface.Surface(size, pgl.SRCALPHA)
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207 mask.fill(pygame.color.Color(0, 0, 0, 0))
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208 pointlist = [pymunk.pygame_util.to_pygame(p, surface)
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209 for p in self.outline]
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210 rect = pygame.draw.polygon(mask,
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211 pygame.color.Color(
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212 255, 255, 255, self._alpha),
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213 pointlist, 0)
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214 self._offset = (rect.x, rect.y)
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215 self._tiled = tile_surface((rect.w, rect.h), self._tile_image)
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216 self._tiled.blit(mask, (0, 0), rect,
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217 special_flags=pgl.BLEND_RGBA_MULT)
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218
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219 def render(self, surface):
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220 self._make_surface(surface)
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221 surface.blit(self._tiled, self._offset)
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222 super(TiledRenderer, self).render(surface)