X-Git-Url: https://git.ctpug.org.za/?a=blobdiff_plain;f=tabakrolletjie%2Flights.py;h=3c9795212fdcc00b8e4b1b782c7de62991f1f593;hb=53356dd6cda09226e2d46ddf94d00283412577b5;hp=81740d88fd2003603c3332323900d120f3f5d283;hpb=2e20539ebb1efedfdc675962961c10b6985c09a7;p=tabakrolletjie.git diff --git a/tabakrolletjie/lights.py b/tabakrolletjie/lights.py index 81740d8..3c97952 100644 --- a/tabakrolletjie/lights.py +++ b/tabakrolletjie/lights.py @@ -3,26 +3,128 @@ import pymunk import pymunk.pygame_util +import pygame.display import pygame.draw +from .constants import ( + SCREEN_SIZE, LIGHT_CATEGORY, FITTINGS_CATEGORY) +from .utils import debug_timer + +LIGHT_FILTER = pymunk.ShapeFilter( + mask=pymunk.ShapeFilter.ALL_MASKS ^ ( + LIGHT_CATEGORY | FITTINGS_CATEGORY), + categories=LIGHT_CATEGORY) + +FITTINGS_FILTER = pymunk.ShapeFilter( + mask=pymunk.ShapeFilter.ALL_MASKS ^ ( + LIGHT_CATEGORY | FITTINGS_CATEGORY), + categories=FITTINGS_CATEGORY) + + +def screen_rays(pos): + """ An iterable that returns ordered rays from pos to the edge of the + screen, starting with the edge point (0, 0) and continuing clockwise + in pymunk coordinates. + """ + w, h = SCREEN_SIZE + left, right, bottom, top = 0, w, 0, h + step = 1 + for y in range(0, h, step): + yield pymunk.Vec2d(left, y) + for x in range(0, w, step): + yield pymunk.Vec2d(x, top) + for y in range(top, -1, -step): + yield pymunk.Vec2d(right, y) + for x in range(right, -1, -step): + yield pymunk.Vec2d(x, bottom) + + +@debug_timer("lights.calculate_ray_polys") +def calculate_ray_polys(space, body, position): + position = pymunk.Vec2d(position) + vertices = [position] + ray_polys = [] + for ray in screen_rays(position): + info = space.segment_query_first(position, ray, 1, LIGHT_FILTER) + point = ray if info is None else info.point + vertices.append(point) + if len(vertices) > 3: + trial_poly = pymunk.Poly(None, vertices) + trial_poly.update(pymunk.Transform.identity()) + query_prev = trial_poly.point_query(vertices[-2]) + query_pos = trial_poly.point_query(position) + if query_prev.distance < -0.01 or query_pos.distance < -0.01: + new_poly = pymunk.Poly(body, vertices[:-1]) + vertices = [position, vertices[-1]] + ray_polys.append(new_poly) + else: + vertices = trial_poly.get_vertices() + [point] + if len(vertices) > 2: + ray_polys.append(pymunk.Poly(body, vertices)) + return ray_polys + + +class LightManager(object): + """ Manages a set of lights. """ + + def __init__(self, space, gamestate): + self._space = space + self._lights = [ + BaseLight.load(cfg) for cfg in gamestate.station["lights"]] + for light in self._lights: + light.add(self._space) + + def toggle_nearest(self, *args, **kw): + light = self.nearest(*args, **kw) + if light: + light.toggle() + + def nearest(self, pos, surfpos=False, max_distance=1.0): + if surfpos: + surface = pygame.display.get_surface() + pos = pymunk.pygame_util.from_pygame(pos, surface) + point_info = self._space.point_query_nearest( + pos, max_distance, pymunk.ShapeFilter(mask=FITTINGS_CATEGORY)) + if point_info is not None: + return point_info.shape.body.light + return None + + def lit_by(self, pos, surfpos=False, max_distance=0.0): + if surfpos: + surface = pygame.display.get_surface() + pos = pymunk.pygame_util.from_pygame(pos, surface) + point_info_list = self._space.point_query( + pos, max_distance, pymunk.ShapeFilter(mask=LIGHT_CATEGORY)) + lights = [p.shape.body.light for p in point_info_list] + return [light for light in lights if light.on] + + def render_light(self, surface): + for light in self._lights: + light.render_light(surface) + + def render_fittings(self, surface): + for light in self._lights: + light.render_fitting(surface) + class BaseLight(object): """ Common light functionality. """ + COLOURS = { + "red": (255, 0, 0), + "green": (0, 255, 0), + "blue": (0, 255, 255), + "yellow": (255, 255, 0), + "white": (255, 255, 255), + } + def __init__(self, colour, position): - self.body = pymunk.Body(0, 0, pymunk.body.Body.STATIC) self.colour = colour - self.position = position - - def add(self, space): - if self.body.space is not None: - space.remove(self.body, *self.body.shapes) - shapes = self.determine_ray_polys(space) - space.add(self.body, *shapes) - - def determine_ray_polys(self, space): - raise NotImplementedError( - "Lights should implement .determine_ray_polys.") + self.position = pymunk.Vec2d(position) + self.on = True + self.body = pymunk.Body(0, 0, pymunk.body.Body.STATIC) + self.fitting = pymunk.Circle(self.body, 10.0, self.position) + self.body.light = self @classmethod def load(cls, config): @@ -33,25 +135,54 @@ class BaseLight(object): if c.__name__.lower() == light_type] return light_class(**kw) + def add(self, space): + if self.body.space is not None: + space.remove(self.body, *self.body.shapes) + shapes = self.shapes_for_ray_polys( + calculate_ray_polys(space, self.body, self.position)) + for shape in shapes: + shape.filter = LIGHT_FILTER + self.fitting.filter = FITTINGS_FILTER + space.add(self.body, self.fitting, *shapes) -class SpotLight(BaseLight): - def __init__( - self, colour="white", position=None, direction=90.0, spread=45.0): - super(SpotLight, self).__init__(colour, position) - self.direction = direction - self.spread = spread + def shapes_for_ray_polys(self, ray_polys): + return ray_polys - def determine_ray_polys(self, space): - x, y = self.position - return [pymunk.Poly(self.body, [ - self.position, [x + 50, y], [x, y + 50]])] + def toggle(self): + self.on = not self.on - def render(self, surface): + def render_light(self, surface): + if not self.on: + return + subsurface = surface.copy() + light_colour = self.COLOURS[self.colour] for shape in self.body.shapes: + if shape is self.fitting: + continue pygame_poly = [ pymunk.pygame_util.to_pygame(v, surface) for v in shape.get_vertices()] - pygame.draw.polygon(surface, (255, 255, 255), pygame_poly) + pygame.draw.polygon( + subsurface, light_colour, pygame_poly, 0) + pygame.draw.aalines( + subsurface, light_colour, True, pygame_poly, 1) + subsurface.set_alpha(50) + surface.blit(subsurface, (0, 0), None) + + def render_fitting(self, surface): + pygame.draw.circle( + surface, (255, 255, 0), + pymunk.pygame_util.to_pygame(self.fitting.offset, surface), + int(self.fitting.radius)) + + +class SpotLight(BaseLight): + def __init__( + self, colour="white", position=None, direction=90.0, spread=45.0): + super(SpotLight, self).__init__(colour, position) + self.direction = direction + self.spread = spread + self.i = 0 class Lamp(BaseLight):