tabakrolletjie/lights.py

   1 """ May it be a light for you in dark places, when all other lights go out.
   2 """
   3
   4 import math
   5
   6 import pymunk
   7 import pymunk.pygame_util
   8 import pygame.display
   9 import pygame.draw
  10 import pygame.locals as pgl
  11 import pygame.rect
  12 import pygame.transform
  13
  14 from .constants import (
  15     LIGHT_CATEGORY, FITTINGS_CATEGORY, OBSTACLE_CATEGORY, TURNIP_CATEGORY,
  16     COLOURS)
  17 from .rays import RayPolyManager
  18 from .utils import DetailedTimer
  19 from .loader import loader
  20 from .transforms import ColourWedges
  21
  22 LIGHT_FILTER = pymunk.ShapeFilter(
  23     mask=pymunk.ShapeFilter.ALL_MASKS ^ (
  24         LIGHT_CATEGORY | FITTINGS_CATEGORY),
  25     categories=LIGHT_CATEGORY)
  26
  27 FITTINGS_FILTER = pymunk.ShapeFilter(
  28     mask=pymunk.ShapeFilter.ALL_MASKS ^ (
  29         LIGHT_CATEGORY | FITTINGS_CATEGORY),
  30     categories=FITTINGS_CATEGORY)
  31
  32 # Just match lights, nothing else
  33 LIT_BY_FILTER = pymunk.ShapeFilter(mask=LIGHT_CATEGORY)
  34 SPACE_FOR_LIGHT_FILTER = pymunk.ShapeFilter(
  35     mask=FITTINGS_CATEGORY | OBSTACLE_CATEGORY | TURNIP_CATEGORY)
  36
  37
  38 def check_space_for_light(space, pos, max_distance):
  39     point_info = space.point_query_nearest(
  40         pos, max_distance, SPACE_FOR_LIGHT_FILTER)
  41     if point_info is not None:
  42         return True
  43     return False
  44
  45
  46 class LightManager(object):
  47     """ Manages a set of lights. """
  48
  49     def __init__(self, space, gamestate):
  50         self._space = space
  51         self._battery_dead = False
  52         self._lights = [
  53             BaseLight.load(cfg) for cfg in gamestate.station["lights"]]
  54         for light in self._lights:
  55             light.add(self._space)
  56
  57     def add_light(self, cfg):
  58         light = BaseLight.load(cfg)
  59         self._lights.append(light)
  60         light.add(self._space)
  61
  62     def remove_light(self, light):
  63         self._lights.remove(light)
  64         light.remove(self._space)
  65
  66     def battery_dead(self):
  67         self._battery_dead = True
  68         for light in self._lights:
  69             light.off()
  70
  71     def serialize_lights(self):
  72         result = []
  73         for light in self._lights:
  74             result.append(light.serialize())
  75         return result
  76
  77     def toggle_nearest(self, *args, **kw):
  78         if self._battery_dead:
  79             return
  80         light = self.nearest(*args, **kw)
  81         if light:
  82             light.toggle()
  83
  84     def nearest(self, pos, surfpos=False, max_distance=1.0):
  85         if surfpos:
  86             surface = pygame.display.get_surface()
  87             pos = pymunk.pygame_util.from_pygame(pos, surface)
  88         point_info = self._space.point_query_nearest(
  89             pos, max_distance, pymunk.ShapeFilter(mask=FITTINGS_CATEGORY))
  90         if point_info is not None:
  91             return point_info.shape.body.light
  92         return None
  93
  94     def lit_by(self, pos, surfpos=False, max_distance=0.0):
  95         if surfpos:
  96             surface = pygame.display.get_surface()
  97             pos = pymunk.pygame_util.from_pygame(pos, surface)
  98         point_info_list = self._space.point_query(
  99             pos, max_distance, LIT_BY_FILTER)
 100         lights = [p.shape.body.light for p in point_info_list]
 101         return [
 102             light for light in lights
 103             if light.on and light.ray_manager.reaches(pos)
 104         ]
 105
 106     def light_query(self, shape):
 107         """Query the lights by shape"""
 108         old_filter = shape.filter
 109         # We need to restrict matches to only the lights
 110         shape.filter = LIT_BY_FILTER
 111         shape_info_list = self._space.shape_query(shape)
 112         shape.filter = old_filter
 113         lights = [p.shape.body.light for p in shape_info_list]
 114         return [
 115             light for light in lights
 116             if light.on and light.ray_manager.reaches(shape.body.position)
 117         ]
 118
 119     def total_power_usage(self):
 120         return sum(light.power_usage() for light in self._lights)
 121
 122     def render_light(self, surface):
 123         for light in self._lights:
 124             light.render_light(surface)
 125
 126     def render_fittings(self, surface):
 127         for light in self._lights:
 128             light.render_fitting(surface)
 129
 130     def tick(self):
 131         for light in self._lights:
 132             light.tick()
 133
 134
 135 def light_fitting_by_type(light_type):
 136     """ Render a light fitting image for a light type. """
 137     return BaseLight.find_cls(light_type).FITTING_IMG
 138
 139
 140 def seed_cost(light_config, num_colours):
 141     """Calculate a seed cost for a light from its configuration. """
 142     cls = BaseLight.find_cls(light_config["type"])
 143     return cls.BASE_COST + int(cls.find_cost(light_config) / 10) + num_colours
 144
 145
 146 class BaseLight(object):
 147     """ Common light functionality. """
 148
 149     # defaults
 150     RAY_MANAGER = RayPolyManager
 151     FITTING_IMG = None
 152     FITTING_RADIUS = 24.0
 153     BASE_COST = 0
 154
 155     # cached surfaces
 156     _surface_cache = {}
 157
 158     def __init__(
 159             self, colours, position, intensity=1.0, radius_limits=None,
 160             direction=None, spread=None, on=True, start_colour=None,
 161             bounding_radius=None):
 162         self.colour_cycle = colours
 163         self.colour_pos = 0
 164         self.colour = colours[0]
 165         if start_colour and start_colour in colours:
 166             self.colour_pos = colours.index(start_colour)
 167             self.colour = start_colour
 168         self.on = on
 169         if not on:
 170             self.colour_pos = -1
 171         self.intensity = intensity
 172         self.body = pymunk.Body(0, 0, pymunk.body.Body.STATIC)
 173         self.body.light = self
 174         self.ray_manager = self.RAY_MANAGER(
 175             self.body, position, ray_filter=LIGHT_FILTER,
 176             radius_limits=radius_limits, direction=direction, spread=spread,
 177             bounding_radius=bounding_radius)
 178         self.fitting = pymunk.Circle(
 179             self.body, self.FITTING_RADIUS, self.ray_manager.position)
 180         self.fitting.filter = FITTINGS_FILTER
 181         self._fitting_image = None
 182         self._colour_mult_image = None
 183
 184     def serialize(self):
 185         result = self.ray_manager.serialize()
 186         result.update({
 187             "type": self.__class__.__name__.lower(),
 188             "colours": self.colour_cycle,
 189             "position": self.position,
 190             "intensity": self.intensity,
 191             "on": self.on,
 192             "start_colour": self.colour,
 193         })
 194         return result
 195
 196     @property
 197     def position(self):
 198         return self.ray_manager.position
 199
 200     @classmethod
 201     def load(cls, config):
 202         kw = config.copy()
 203         light_type = kw.pop("type")
 204         light_class = cls.find_cls(light_type)
 205         return light_class(**kw)
 206
 207     @classmethod
 208     def find_cls(cls, light_type):
 209         [light_class] = [
 210             c for c in cls.__subclasses__()
 211             if c.__name__.lower() == light_type]
 212         return light_class
 213
 214     @classmethod
 215     def find_cost(cls, config):
 216         cost = 5 * config["intensity"]
 217         return cost
 218
 219     def add(self, space):
 220         if self.body.space is not None:
 221             space.remove(self.body, *self.body.shapes)
 222         space.add(self.body, self.fitting)
 223         self.ray_manager.set_space(space)
 224         self.ray_manager.update_shapes()
 225
 226     def remove(self, space):
 227         if self.body.space is not None:
 228             space.remove(self.body, *self.body.shapes)
 229
 230     def _cached_surface(self, name, surface):
 231         surf = self._surface_cache.get(name)
 232         if surf is None:
 233             surf = self._surface_cache[name] = pygame.surface.Surface(
 234                 surface.get_size(), pgl.SWSURFACE
 235             ).convert_alpha()
 236         return surf
 237
 238     def light_colour(self):
 239         light_colour = COLOURS[self.colour]
 240         intensity = int(255 * self.intensity)
 241         return light_colour + (intensity,)
 242
 243     def render_light(self, surface):
 244         if not self.on:
 245             return
 246
 247         dt = DetailedTimer("render_light")
 248         dt.start()
 249
 250         max_radius = self.ray_manager.max_radius
 251         min_radius = self.ray_manager.min_radius
 252         dest_rect = self.ray_manager.pygame_rect(surface)
 253
 254         white, black = (255, 255, 255, 255), (0, 0, 0, 0)
 255         light_colour = self.light_colour()
 256
 257         radius_mask = self._cached_surface('radius_mask', surface)
 258         radius_mask.set_clip(dest_rect)
 259         ray_mask = self._cached_surface('ray_mask', surface)
 260         ray_mask.set_clip(dest_rect)
 261
 262         ray_mask.fill(black)
 263         for pygame_poly in self.ray_manager.pygame_polys(surface):
 264             pygame.draw.polygon(ray_mask, white, pygame_poly, 0)
 265             pygame.draw.polygon(ray_mask, white, pygame_poly, 1)
 266         dt.lap("ray mask rendered")
 267
 268         radius_mask.fill(black)
 269         centre = self.ray_manager.pygame_position(surface)
 270         pygame.draw.circle(
 271             radius_mask, light_colour, centre, int(max_radius), 0)
 272         pygame.draw.circle(
 273             radius_mask, black, centre, int(min_radius), 0)
 274         dt.lap("radius mask rendered")
 275
 276         ray_mask.blit(radius_mask, dest_rect, dest_rect, pgl.BLEND_RGBA_MULT)
 277         dt.lap("blitted radius mask to ray mask")
 278
 279         surface.blit(ray_mask, dest_rect, dest_rect)
 280         dt.lap("blitted surface")
 281         dt.end()
 282
 283     def fitting_image(self):
 284         if self._fitting_image is None:
 285             self._fitting_image = loader.load_image(
 286                 "48", self.FITTING_IMG,
 287                 transform=ColourWedges(colours=self.colour_cycle))
 288         return self._fitting_image
 289
 290     def invalidate_fitting_image(self):
 291         self._fitting_image = None
 292
 293     def render_fitting(self, surface):
 294         rx, ry = self.ray_manager.pygame_position(surface)
 295         surface.blit(self.fitting_image(), (rx - self.FITTING_RADIUS, ry - self.FITTING_RADIUS), None, 0)
 296
 297     def power_usage(self):
 298         if not self.on:
 299             return 0.0
 300         area = math.pi * (self.ray_manager.max_radius ** 2)  # radius
 301         area = area * (self.ray_manager.spread / (2 * math.pi))  # spread
 302         return 5 * area * self.intensity / 6400  # 80x80 unit area
 303
 304     def base_damage(self):
 305         return 10 * self.intensity
 306
 307     def off(self):
 308         self.on = False
 309         self.colour_pos = -1
 310
 311     def toggle(self):
 312         self.colour_pos += 1
 313         if self.colour_pos >= len(self.colour_cycle):
 314             self.colour = self.colour_cycle[0]
 315             self.colour_pos = -1
 316             self.on = False
 317         else:
 318             self.colour = self.colour_cycle[self.colour_pos]
 319             self.on = True
 320
 321     def tick(self):
 322         pass
 323
 324
 325 class Lamp(BaseLight):
 326
 327     FITTING_IMG = "lamp.png"
 328     BASE_COST = 1
 329
 330
 331 class PulsatingLamp(BaseLight):
 332
 333     FITTING_IMG = "pulsatinglamp.png"
 334     DEFAULT_PULSE_RANGE = (20, 100)
 335     DEFAULT_PULSE_VELOCITY = 2
 336     DEFAULT_INTENSITY_RANGE = (0.0, 0.9)
 337     DEFAULT_INTENSITY_VELOCITY = 0.1
 338     BASE_COST = 3
 339
 340     def __init__(self, **kw):
 341         self.pulse_range = kw.pop("pulse_range", self.DEFAULT_PULSE_RANGE)
 342         self.pulse_velocity = kw.pop(
 343             "pulse_velocity", self.DEFAULT_PULSE_VELOCITY)
 344         self.intensity_range = kw.pop(
 345             "intensity_range", self.DEFAULT_INTENSITY_RANGE)
 346         self.intensity_velocity = kw.pop(
 347             "intensity_velocity", self.DEFAULT_INTENSITY_VELOCITY)
 348         super(PulsatingLamp, self).__init__(
 349             bounding_radius=self.pulse_range[1], **kw)
 350
 351     def serialize(self):
 352         result = super(PulsatingLamp, self).serialize()
 353         result["pulse_velocity"] = self.pulse_velocity
 354         result["intensity_range"] = self.intensity_range
 355         result["intensity_velocity"] = self.intensity_velocity
 356         return result
 357
 358     def _update_range(self, value, velocity, value_range):
 359         value += velocity
 360         if value < value_range[0]:
 361             value = value_range[0]
 362             velocity = -velocity
 363         elif value > value_range[1]:
 364             value = value_range[1]
 365             velocity = -velocity
 366         return value, velocity
 367
 368     def tick(self):
 369         self.ray_manager.max_radius, self.pulse_velocity = self._update_range(
 370             self.ray_manager.max_radius, self.pulse_velocity, self.pulse_range)
 371         self.intensity, self.intensity_velocity = self._update_range(
 372             self.intensity, self.intensity_velocity, self.intensity_range)
 373
 374     @classmethod
 375     def find_cost(cls, config):
 376         cost = super(PulsatingLamp, cls).find_cost(config)
 377         cost += config.get("pulse_velocity", cls.DEFAULT_PULSE_VELOCITY)
 378         pr = config.get("pulse_range", cls.DEFAULT_PULSE_RANGE)
 379         cost += (pr[1] - pr[0]) / 10
 380         cost += 5 * config.get("intensity_velocity", cls.DEFAULT_INTENSITY_VELOCITY)
 381         ir = config.get("intensity_range", cls.DEFAULT_INTENSITY_RANGE)
 382         cost += 5 * (ir[1] - ir[0])
 383         return cost
 384
 385
 386 class SpotLight(BaseLight):
 387
 388     FITTING_IMG = "spotlight.png"
 389     BASE_COST = 5
 390
 391     def __init__(self, **kw):
 392         self.angular_velocity = kw.pop("angular_velocity", None)
 393         super(SpotLight, self).__init__(**kw)
 394
 395     def serialize(self):
 396         result = super(SpotLight, self).serialize()
 397         result["angular_velocity"] = self.angular_velocity
 398         return result
 399
 400     def fitting_image(self):
 401         fitting_image = super(SpotLight, self).fitting_image()
 402         rot_fitting_image = pygame.transform.rotozoom(
 403             fitting_image, self.ray_manager.direction - 90, 1)
 404
 405         rot_rect = fitting_image.get_rect().copy()
 406         rot_rect.center = rot_fitting_image.get_rect().center
 407         rot_fitting_image = rot_fitting_image.subsurface(rot_rect).copy()
 408
 409         return rot_fitting_image
 410
 411     def tick(self):
 412         if self.angular_velocity:
 413             self.ray_manager.direction -= self.angular_velocity
 414             self.ray_manager.update_shapes()
 415
 416     @classmethod
 417     def find_cost(cls, config):
 418         cost = super(SpotLight, cls).find_cost(config)
 419         cost += config.get("angular_velocity", 0)
 420         return cost