2 from plomrogue.errors import ArgError
6 class YX(collections.namedtuple('YX', ('y', 'x'))):
8 def __add__(self, other):
9 return YX(self.y + other.y, self.x + other.x)
11 def __sub__(self, other):
12 return YX(self.y - other.y, self.x - other.x)
15 return 'Y:%s,X:%s' % (self.y, self.x)
21 def __init__(self, size):
25 def get_directions(self):
28 for name in dir(self):
29 if name[:len(prefix)] == prefix:
30 directions += [name[len(prefix):]]
33 def get_neighbors_yxyx(self, yxyx):
35 for direction in self.get_directions():
36 neighbors[direction] = self.move_yxyx(yxyx, direction)
39 def get_neighbors_yx(self, pos):
41 for direction in self.get_directions():
42 neighbors[direction] = self.move_yx(pos, direction)
45 def get_neighbors_i(self, i):
46 if i in self.neighbors_i:
47 return self.neighbors_i[i]
48 pos = YX(i // self.size.x, i % self.size.x)
49 neighbors_pos = self.get_neighbors_yx(pos)
51 for direction in neighbors_pos:
52 pos = neighbors_pos[direction]
54 neighbors_i[direction] = None
56 neighbors_i[direction] = pos.y * self.size.x + pos.x
57 self.neighbors_i[i] = neighbors_i
58 return self.neighbors_i[i]
60 def move_yx(self, start_yx, direction, check=True):
61 mover = getattr(self, 'move__' + direction)
62 target = mover(start_yx)
63 # TODO refactor with SourcedMap.inside?
64 if target.y < 0 or target.x < 0 or \
65 target.y >= self.size.y or target.x >= self.size.x:
69 def move_yxyx(self, start_yxyx, direction):
70 mover = getattr(self, 'move__' + direction)
71 start_yx = self.undouble_yxyx(*start_yxyx)
72 target_yx = mover(start_yx)
73 return self.double_yx(target_yx)
75 def double_yx(self, absolute_yx):
76 big_y = absolute_yx.y // self.size.y
77 little_y = absolute_yx.y % self.size.y
78 big_x = absolute_yx.x // self.size.x
79 little_x = absolute_yx.x % self.size.x
80 return YX(big_y, big_x), YX(little_y, little_x)
82 def undouble_yxyx(self, big_yx, little_yx):
83 y = big_yx.y * self.size.y + little_yx.y
84 x = big_yx.x * self.size.x + little_yx.x
89 class MapGeometryWithLeftRightMoves(MapGeometry):
91 def move__LEFT(self, start_pos):
92 return YX(start_pos.y, start_pos.x - 1)
94 def move__RIGHT(self, start_pos):
95 return YX(start_pos.y, start_pos.x + 1)
99 class MapGeometrySquare(MapGeometryWithLeftRightMoves):
101 def __init__(self, *args, **kwargs):
102 super().__init__(*args, **kwargs)
103 self.fov_map_class = FovMapSquare
105 def define_segment(self, source_center, radius):
106 source_center = self.undouble_yxyx(*source_center)
107 size = YX(2 * radius + 1, 2 * radius + 1)
108 offset = YX(source_center.y - radius, source_center.x - radius)
109 center = YX(radius, radius)
110 return size, offset, center
112 def move__UP(self, start_pos):
113 return YX(start_pos.y - 1, start_pos.x)
115 def move__DOWN(self, start_pos):
116 return YX(start_pos.y + 1, start_pos.x)
119 class MapGeometryHex(MapGeometryWithLeftRightMoves):
121 def __init__(self, *args, **kwargs):
122 super().__init__(*args, **kwargs)
123 self.fov_map_class = FovMapHex
125 def define_segment(self, source_center, radius):
126 source_center = self.undouble_yxyx(*source_center)
127 indent = 1 if (source_center.y % 2) else 0
128 size = YX(2 * radius + 1 + indent, 2 * radius + 1)
129 offset = YX(source_center.y - radius - indent, source_center.x - radius)
130 center = YX(radius + indent, radius)
131 return size, offset, center
133 def move__UPLEFT(self, start_pos):
134 start_indented = start_pos.y % 2
136 return YX(start_pos.y - 1, start_pos.x)
138 return YX(start_pos.y - 1, start_pos.x - 1)
140 def move__UPRIGHT(self, start_pos):
141 start_indented = start_pos.y % 2
143 return YX(start_pos.y - 1, start_pos.x + 1)
145 return YX(start_pos.y - 1, start_pos.x)
147 def move__DOWNLEFT(self, start_pos):
148 start_indented = start_pos.y % 2
150 return YX(start_pos.y + 1, start_pos.x)
152 return YX(start_pos.y + 1, start_pos.x - 1)
154 def move__DOWNRIGHT(self, start_pos):
155 start_indented = start_pos.y % 2
157 return YX(start_pos.y + 1, start_pos.x + 1)
159 return YX(start_pos.y + 1, start_pos.x)
165 def __init__(self, map_geometry):
166 self.geometry = map_geometry
167 self.terrain = '.' * self.size_i
169 def __getitem__(self, yx):
170 return self.terrain[self.get_position_index(yx)]
172 def __setitem__(self, yx, c):
173 pos_i = self.get_position_index(yx)
175 self.terrain = self.terrain[:pos_i] + c + self.terrain[pos_i + 1:]
177 self.terrain[pos_i] = c
180 """Iterate over YX position coordinates."""
181 for y in range(self.geometry.size.y):
182 for x in range(self.geometry.size.x):
187 return self.geometry.size.y * self.geometry.size.x
189 def set_line(self, y, line):
190 height_map = self.geometry.size.y
191 width_map = self.geometry.size.x
193 raise ArgError('too large row number %s' % y)
194 width_line = len(line)
195 if width_line != width_map:
196 raise ArgError('map line width %s unequal map width %s' % (width_line, width_map))
197 self.terrain = self.terrain[:y * width_map] + line +\
198 self.terrain[(y + 1) * width_map:]
200 def get_position_index(self, yx):
201 return yx.y * self.geometry.size.x + yx.x
204 width = self.geometry.size.x
205 for y in range(self.geometry.size.y):
206 yield (y, self.terrain[y * width:(y + 1) * width])
210 class SourcedMap(Map):
212 def __init__(self, things, source_maps, source_center, radius, get_map):
213 self.source_maps = source_maps
215 example_map = get_map(YX(0, 0))
216 self.source_geometry = example_map.geometry
217 size, self.offset, self.center = \
218 self.source_geometry.define_segment(source_center, radius)
219 self.geometry = self.source_geometry.__class__(size)
221 big_yx, _ = self.source_yxyx(yx)
223 self.source_map_segment = ''
225 for yxyx in [t.position for t in things if t.blocking]:
226 if yxyx == source_center:
228 if yxyx[0] not in obstacles:
229 obstacles[yxyx[0]] = []
230 obstacles[yxyx[0]] += [yxyx[1]]
232 big_yx, little_yx = self.source_yxyx(yx)
233 if big_yx in obstacles and little_yx in obstacles[big_yx]:
234 self.source_map_segment += 'X'
236 self.source_map_segment += self.source_maps[big_yx][little_yx]
238 def source_yxyx(self, yx):
239 absolute_yx = yx + self.offset
240 big_yx, little_yx = self.source_geometry.double_yx(absolute_yx)
241 return big_yx, little_yx
243 def target_yx(self, big_yx, little_yx, check=False):
244 target_yx = self.source_geometry.undouble_yxyx(big_yx, little_yx) - self.offset
245 if check and not self.inside(target_yx):
249 def inside(self, yx):
250 if yx.y < 0 or yx.x < 0 or \
251 yx.y >= self.geometry.size.y or yx.x >= self.geometry.size.x:
257 class DijkstraMap(SourcedMap):
259 def __init__(self, *args, **kwargs):
260 super().__init__(*args, **kwargs)
261 self.terrain = [255] * self.size_i
262 self[self.center] = 0
266 for i in range(self.size_i):
267 if self.source_map_segment[i] == 'X':
269 neighbors = self.geometry.get_neighbors_i(i)
270 for direction in [d for d in neighbors if neighbors[d]]:
271 j = neighbors[direction]
272 if self.terrain[j] < self.terrain[i] - 1:
273 self.terrain[i] = self.terrain[j] + 1
275 # print('DEBUG Dijkstra')
278 # for n in self.terrain:
279 # line_to_print += ['%3s' % n]
281 # if x >= self.geometry.size.x:
283 # print(' '.join(line_to_print))
288 class FovMap(SourcedMap):
289 # TODO: player visibility asymmetrical (A can see B when B can't see A):
290 # does this make sense, or not?
292 def __init__(self, *args, **kwargs):
293 super().__init__(*args, **kwargs)
294 self.terrain = '?' * self.size_i
295 self[self.center] = '.'
296 self.shadow_cones = []
297 self.circle_out(self.center, self.shadow_process)
299 def throws_shadow(self, yx):
300 return self.source_map_segment[self.get_position_index(yx)] == 'X'
302 def shadow_process(self, yx, distance_to_center, dir_i, dir_progress):
303 # Possible optimization: If no shadow_cones yet and self[yx] == '.',
305 CIRCLE = 360 # Since we'll float anyways, number is actually arbitrary.
307 def correct_arm(arm):
312 def in_shadow_cone(new_cone):
313 for old_cone in self.shadow_cones:
314 if old_cone[0] <= new_cone[0] and \
315 new_cone[1] <= old_cone[1]:
317 # We might want to also shade tiles whose middle arm is inside a
318 # shadow cone for a darker FOV. Note that we then could not for
319 # optimization purposes rely anymore on the assumption that a
320 # shaded tile cannot add growth to existing shadow cones.
323 def merge_cone(new_cone):
325 for old_cone in self.shadow_cones:
326 if new_cone[0] < old_cone[0] and \
327 (new_cone[1] > old_cone[0] or
328 math.isclose(new_cone[1], old_cone[0])):
329 old_cone[0] = new_cone[0]
331 if new_cone[1] > old_cone[1] and \
332 (new_cone[0] < old_cone[1] or
333 math.isclose(new_cone[0], old_cone[1])):
334 old_cone[1] = new_cone[1]
339 if in_shadow_cone(cone):
342 if self.throws_shadow(yx):
344 while merge_cone(cone):
347 self.shadow_cones += [cone]
349 step_size = (CIRCLE / len(self.circle_out_directions)) / distance_to_center
350 number_steps = dir_i * distance_to_center + dir_progress
351 left_arm = correct_arm(step_size / 2 + step_size * number_steps)
352 right_arm = correct_arm(left_arm + step_size)
354 # Optimization potential: left cone could be derived from previous
355 # right cone. Better even: Precalculate all cones.
356 if right_arm < left_arm:
357 eval_cone([left_arm, CIRCLE])
358 eval_cone([0, right_arm])
360 eval_cone([left_arm, right_arm])
362 def basic_circle_out_move(self, pos, direction):
363 mover = getattr(self.geometry, 'move__' + direction)
366 def circle_out(self, yx, f):
367 # Optimization potential: Precalculate movement positions. (How to check
368 # circle_in_map then?)
369 # Optimization potential: Precalculate what tiles are shaded by what tile
370 # and skip evaluation of already shaded tile. (This only works if tiles
371 # shading implies they completely lie in existing shades; otherwise we
372 # would lose shade growth through tiles at shade borders.)
375 while distance <= self.radius:
376 yx = self.basic_circle_out_move(yx, 'RIGHT')
377 for dir_i in range(len(self.circle_out_directions)):
378 for dir_progress in range(distance):
379 direction = self.circle_out_directions[dir_i]
380 yx = self.circle_out_move(yx, direction)
381 f(yx, distance, dir_i, dir_progress)
387 class FovMapHex(FovMap):
388 circle_out_directions = ('DOWNLEFT', 'LEFT', 'UPLEFT',
389 'UPRIGHT', 'RIGHT', 'DOWNRIGHT')
391 def circle_out_move(self, yx, direction):
392 return self.basic_circle_out_move(yx, direction)
396 class FovMapSquare(FovMap):
397 circle_out_directions = (('DOWN', 'LEFT'), ('LEFT', 'UP'),
398 ('UP', 'RIGHT'), ('RIGHT', 'DOWN'))
400 def circle_out_move(self, yx, direction):
401 yx = self.basic_circle_out_move(yx, direction[0])
402 return self.basic_circle_out_move(yx, direction[1])