+class SourcedMap(Map):
+
+ def __init__(self, block_chars, obstacle_positions, source_maps,
+ source_center, radius, get_map):
+ self.block_chars = block_chars
+ self.radius = radius
+ example_map = get_map(YX(0, 0))
+ self.source_geometry = example_map.geometry
+ size, self.offset, self.center = \
+ self.source_geometry.define_segment(source_center, radius)
+ self.geometry = self.source_geometry.__class__(size)
+ self.source_map_segment = ''
+ if source_center in obstacle_positions:
+ obstacle_positions.remove(source_center)
+ for yx in self:
+ big_yx, little_yx = self.source_yxyx(yx)
+ get_map(big_yx)
+ if (big_yx, little_yx) in obstacle_positions:
+ self.source_map_segment += self.block_chars[0]
+ else:
+ self.source_map_segment += source_maps[big_yx][little_yx]
+
+ def source_yxyx(self, yx):
+ absolute_yx = yx + self.offset
+ big_yx, little_yx = self.source_geometry.double_yx(absolute_yx)
+ return big_yx, little_yx
+
+ def target_yx(self, big_yx, little_yx, check=False):
+ target_yx = self.source_geometry.undouble_yxyx(big_yx, little_yx) - self.offset
+ if check and not self.inside(target_yx):
+ return False
+ return target_yx
+
+ def inside(self, yx):
+ if yx.y < 0 or yx.x < 0 or \
+ yx.y >= self.geometry.size.y or yx.x >= self.geometry.size.x:
+ return False
+ return True