plomlompom.com Git - plomrogue2-experiments/blob - new/plomrogue/mapping.py

   1 from plomrogue.errors import ArgError
   2 import collections
   3
   4
   5
   6 class YX(collections.namedtuple('YX', ('y', 'x'))):
   7
   8     def __add__(self, other):
   9         return YX(self.y + other.y, self.x + other.x)
  10
  11     def __sub__(self, other):
  12         return YX(self.y - other.y, self.x - other.x)
  13
  14     def __str__(self):
  15         return 'Y:%s,X:%s' % (self.y, self.x)
  16
  17
  18
  19 class Map:
  20
  21     def __init__(self, size=YX(0, 0), init_char = '?'):
  22         self.size = size
  23         self.terrain = init_char*self.size_i
  24
  25     def __getitem__(self, yx):
  26         return self.terrain[self.get_position_index(yx)]
  27
  28     def __setitem__(self, yx, c):
  29         pos_i = self.get_position_index(yx)
  30         if type(c) == str:
  31             self.terrain = self.terrain[:pos_i] + c + self.terrain[pos_i + 1:]
  32         else:
  33             self.terrain[pos_i] = c
  34
  35     def __iter__(self):
  36         """Iterate over YX position coordinates."""
  37         for y in range(self.size.y):
  38             for x in range(self.size.x):
  39                 yield YX(y, x)
  40
  41     @property
  42     def size_i(self):
  43         return self.size.y * self.size.x
  44
  45     def set_line(self, y, line):
  46         height_map = self.size.y
  47         width_map = self.size.x
  48         if y >= height_map:
  49             raise ArgError('too large row number %s' % y)
  50         width_line = len(line)
  51         if width_line > width_map:
  52             raise ArgError('too large map line width %s' % width_line)
  53         self.terrain = self.terrain[:y * width_map] + line +\
  54                        self.terrain[(y + 1) * width_map:]
  55
  56     def get_position_index(self, yx):
  57         return yx.y * self.size.x + yx.x
  58
  59     def lines(self):
  60         width = self.size.x
  61         for y in range(self.size.y):
  62             yield (y, self.terrain[y * width:(y + 1) * width])
  63
  64
  65
  66 class MapGeometry():
  67
  68     def get_directions(self):
  69         directions = []
  70         for name in dir(self):
  71             if name[:5] == 'move_':
  72                 directions += [name[5:]]
  73         return directions
  74
  75     def get_neighbors(self, pos, map_size):
  76         neighbors = {}
  77         if not hasattr(self, 'neighbors_to'):
  78             self.neighbors_to = {}
  79         if not map_size in self.neighbors_to:
  80             self.neighbors_to[map_size] = {}
  81         if pos in self.neighbors_to[map_size]:
  82             return self.neighbors_to[map_size][pos]
  83         for direction in self.get_directions():
  84             neighbors[direction] = self.move(pos, direction, map_size)
  85         self.neighbors_to[map_size][pos] = neighbors
  86         return neighbors
  87
  88     def undouble_coordinate(self, maps_size, coordinate):
  89         y = maps_size.y * coordinate[0].y + coordinate[1].y
  90         x = maps_size.x * coordinate[0].x + coordinate[1].x
  91         return YX(y, x)
  92
  93     def get_view_offset(self, maps_size, center, radius):
  94         yx_to_origin = self.undouble_coordinate(maps_size, center)
  95         return yx_to_origin - YX(radius, radius)
  96
  97     def pos_in_view(self, pos, offset, maps_size):
  98         return self.undouble_coordinate(maps_size, pos) - offset
  99
 100     def correct_double_coordinate(self, map_size, big_yx, little_yx):
 101
 102         def adapt_axis(axis):
 103             maps_crossed = little_yx[axis] // map_size[axis]
 104             new_big = big_yx[axis] + maps_crossed
 105             new_little = little_yx[axis] % map_size[axis]
 106             return new_big, new_little
 107
 108         new_big_y, new_little_y = adapt_axis(0)
 109         new_big_x, new_little_x = adapt_axis(1)
 110         return YX(new_big_y, new_big_x), YX(new_little_y, new_little_x)
 111
 112     def move(self, start_pos, direction, map_size):
 113         mover = getattr(self, 'move_' + direction)
 114         big_yx, little_yx = start_pos
 115         uncorrected_target = mover(little_yx)
 116         return self.correct_double_coordinate(map_size, big_yx,
 117                                               uncorrected_target)
 118
 119
 120
 121 class MapGeometryWithLeftRightMoves(MapGeometry):
 122
 123     def move_LEFT(self, start_pos):
 124         return YX(start_pos.y, start_pos.x - 1)
 125
 126     def move_RIGHT(self, start_pos):
 127         return YX(start_pos.y, start_pos.x + 1)
 128
 129
 130
 131 class MapGeometrySquare(MapGeometryWithLeftRightMoves):
 132
 133     def move_UP(self, start_pos):
 134         return YX(start_pos.y - 1, start_pos.x)
 135
 136     def move_DOWN(self, start_pos):
 137         return YX(start_pos.y + 1, start_pos.x)
 138
 139
 140
 141 class MapGeometryHex(MapGeometryWithLeftRightMoves):
 142
 143     def __init__(self, *args, **kwargs):
 144         super().__init__(*args, **kwargs)
 145         self.fov_map_type = FovMapHex
 146
 147     def move_UPLEFT(self, start_pos):
 148         if start_pos.y % 2 == 1:
 149             return YX(start_pos.y - 1, start_pos.x - 1)
 150         else:
 151             return YX(start_pos.y - 1, start_pos.x)
 152
 153     def move_UPRIGHT(self, start_pos):
 154         if start_pos.y % 2 == 1:
 155             return YX(start_pos.y - 1, start_pos.x)
 156         else:
 157             return YX(start_pos.y - 1, start_pos.x + 1)
 158
 159     def move_DOWNLEFT(self, start_pos):
 160         if start_pos.y % 2 == 1:
 161              return YX(start_pos.y + 1, start_pos.x - 1)
 162         else:
 163                return YX(start_pos.y + 1, start_pos.x)
 164
 165     def move_DOWNRIGHT(self, start_pos):
 166         if start_pos.y % 2 == 1:
 167             return YX(start_pos.y + 1, start_pos.x)
 168         else:
 169             return YX(start_pos.y + 1, start_pos.x + 1)
 170
 171
 172
 173 class FovMap(Map):
 174
 175     def __init__(self, source_map, center):
 176         self.source_map = source_map
 177         self.size = self.source_map.size
 178         self.fov_radius = (self.size.y / 2) - 0.5
 179         self.terrain = '?' * self.size_i
 180         self[center] = '.'
 181         self.shadow_cones = []
 182         self.circle_out(center, self.shadow_process_hex)
 183
 184     def shadow_process_hex(self, yx, distance_to_center, dir_i, dir_progress):
 185         # Possible optimization: If no shadow_cones yet and self[yx] == '.',
 186         # skip all.
 187         CIRCLE = 360  # Since we'll float anyways, number is actually arbitrary.
 188
 189         def correct_arm(arm):
 190             if arm < 0:
 191                 arm += CIRCLE
 192             return arm
 193
 194         def in_shadow_cone(new_cone):
 195             for old_cone in self.shadow_cones:
 196                 if old_cone[0] >= new_cone[0] and \
 197                     new_cone[1] >= old_cone[1]:
 198                     #print('DEBUG shadowed by:', old_cone)
 199                     return True
 200                 # We might want to also shade hexes whose middle arm is inside a
 201                 # shadow cone for a darker FOV. Note that we then could not for
 202                 # optimization purposes rely anymore on the assumption that a
 203                 # shaded hex cannot add growth to existing shadow cones.
 204             return False
 205
 206         def merge_cone(new_cone):
 207             import math
 208             for old_cone in self.shadow_cones:
 209                 if new_cone[0] > old_cone[0] and \
 210                     (new_cone[1] < old_cone[0] or
 211                      math.isclose(new_cone[1], old_cone[0])):
 212                     #print('DEBUG merging to', old_cone)
 213                     old_cone[0] = new_cone[0]
 214                     #print('DEBUG merged cone:', old_cone)
 215                     return True
 216                 if new_cone[1] < old_cone[1] and \
 217                     (new_cone[0] > old_cone[1] or
 218                      math.isclose(new_cone[0], old_cone[1])):
 219                     #print('DEBUG merging to', old_cone)
 220                     old_cone[1] = new_cone[1]
 221                     #print('DEBUG merged cone:', old_cone)
 222                     return True
 223             return False
 224
 225         def eval_cone(cone):
 226             #print('DEBUG CONE', cone, '(', step_size, distance_to_center, number_steps, ')')
 227             if in_shadow_cone(cone):
 228                 return
 229             self[yx] = '.'
 230             if self.source_map[yx] != '.':
 231                 #print('DEBUG throws shadow', cone)
 232                 unmerged = True
 233                 while merge_cone(cone):
 234                     unmerged = False
 235                 if unmerged:
 236                     self.shadow_cones += [cone]
 237
 238         #print('DEBUG', yx)
 239         step_size = (CIRCLE/len(self.circle_out_directions)) / distance_to_center
 240         number_steps = dir_i * distance_to_center + dir_progress
 241         left_arm = correct_arm(-(step_size/2) - step_size*number_steps)
 242         right_arm = correct_arm(left_arm - step_size)
 243         # Optimization potential: left cone could be derived from previous
 244         # right cone. Better even: Precalculate all cones.
 245         if right_arm > left_arm:
 246             eval_cone([left_arm, 0])
 247             eval_cone([CIRCLE, right_arm])
 248         else:
 249             eval_cone([left_arm, right_arm])
 250
 251     def basic_circle_out_move(self, pos, direction):
 252         """Move position pos into direction. Return whether still in map."""
 253         mover = getattr(self.geometry, 'move_' + direction)
 254         pos = mover(pos)
 255         if pos.y < 0 or pos.x < 0 or \
 256             pos.y >= self.size.y or pos.x >= self.size.x:
 257             return pos, False
 258         return pos, True
 259
 260     def circle_out(self, yx, f):
 261         # Optimization potential: Precalculate movement positions. (How to check
 262         # circle_in_map then?)
 263         # Optimization potential: Precalculate what hexes are shaded by what hex
 264         # and skip evaluation of already shaded hexes. (This only works if hex
 265         # shading implies they completely lie in existing shades; otherwise we
 266         # would lose shade growth through hexes at shade borders.)
 267
 268         # TODO: Start circling only in earliest obstacle distance.
 269         # TODO: get rid of circle_in_map logic
 270         circle_in_map = True
 271         distance = 1
 272         yx = YX(yx.y, yx.x)
 273         #print('DEBUG CIRCLE_OUT', yx)
 274         while circle_in_map:
 275             if distance > self.fov_radius:
 276                 break
 277             circle_in_map = False
 278             yx, _ = self.basic_circle_out_move(yx, 'RIGHT')
 279             for dir_i in range(len(self.circle_out_directions)):
 280                 for dir_progress in range(distance):
 281                     direction = self.circle_out_directions[dir_i]
 282                     yx, test = self.circle_out_move(yx, direction)
 283                     if test:
 284                         f(yx, distance, dir_i, dir_progress)
 285                         circle_in_map = True
 286             distance += 1
 287
 288
 289
 290 class FovMapHex(FovMap):
 291     circle_out_directions = ('DOWNLEFT', 'LEFT', 'UPLEFT',
 292                              'UPRIGHT', 'RIGHT', 'DOWNRIGHT')
 293
 294     def __init__(self, *args, **kwargs):
 295         self.geometry = MapGeometryHex()
 296         super().__init__(*args, **kwargs)
 297
 298     def circle_out_move(self, yx, direction):
 299         return self.basic_circle_out_move(yx, direction)
 300
 301
 302
 303 class FovMapSquare(FovMap):
 304     circle_out_directions = (('DOWN', 'LEFT'), ('LEFT', 'UP'),
 305                              ('UP', 'RIGHT'), ('RIGHT', 'DOWN'))
 306
 307     def __init__(self, *args, **kwargs):
 308         self.geometry = MapGeometrySquare()
 309         super().__init__(*args, **kwargs)
 310
 311     def circle_out_move(self, yx, direction):
 312         self.basic_circle_out_move(yx, direction[0])
 313         return self.basic_circle_out_move(yx, direction[1])
 314