+class MapFovHex(MapHex):
+
+ def __init__(self, source_map, yx):
+ self.source_map = source_map
+ self.size = self.source_map.size
+ self.terrain = '?' * self.size_i
+ self[yx] = '.'
+ self.shadow_angles = []
+ self.circle_out(yx, self.shadow_process_hex)
+
+ def shadow_process_hex(self, yx, distance_to_center, dir_i, hex_i):
+ CIRCLE = 360 # Since we'll float anyways, number is actually arbitrary.
+
+ def correct_angle(angle):
+ if angle < 0:
+ angle += CIRCLE
+ return angle
+
+ def under_shadow_angle(new_angle):
+ for old_angle in self.shadow_angles:
+ if old_angle[0] >= new_angle[0] and \
+ new_angle[1] >= old_angle[1]:
+ #print('DEBUG shadowed by:', old_angle)
+ return True
+ return False
+
+ def merge_angle(new_angle):
+ for old_angle in self.shadow_angles:
+ if new_angle[0] > old_angle[0] and \
+ new_angle[1] <= old_angle[0]:
+ #print('DEBUG merging to', old_angle)
+ old_angle[0] = new_angle[0]
+ #print('DEBUG merged angle:', old_angle)
+ return True
+ if new_angle[1] < old_angle[1] and \
+ new_angle[0] >= old_angle[1]:
+ #print('DEBUG merging to', old_angle)
+ old_angle[1] = new_angle[1]
+ #print('DEBUG merged angle:', old_angle)
+ return True
+ return False
+
+ def eval_angle(angle):
+ new_angle = [left_angle, right_angle]
+ #print('DEBUG ANGLE', angle, '(', step_size, distance_to_center, number_steps, ')')
+ if under_shadow_angle(angle):
+ return
+ self[yx] = '.'
+ if not self.source_map[yx] == '.':
+ #print('DEBUG throws shadow', angle)
+ unmerged = True
+ while merge_angle(angle):
+ unmerged = False
+ if unmerged:
+ self.shadow_angles += [angle]
+
+ #print('DEBUG', yx)
+ step_size = (CIRCLE/6)/distance_to_center
+ number_steps = dir_i * distance_to_center + hex_i
+ left_angle = correct_angle(-(step_size/2) - step_size*number_steps)
+ right_angle = correct_angle(left_angle - step_size)
+ if right_angle > left_angle:
+ eval_angle([left_angle, 0])
+ eval_angle([CIRCLE, right_angle])
+ else:
+ eval_angle([left_angle, right_angle])
+
+ def circle_out(self, yx, f):
+
+ def move(pos, direction):
+ """Move position pos into direction. Return whether still in map."""
+ mover = getattr(self, 'move_' + direction)
+ pos[:] = mover(pos)
+ if pos[0] < 0 or pos[1] < 0 or \
+ pos[0] >= self.size[0] or pos[1] >= self.size[1]:
+ return False
+ return True
+
+ directions = ('DOWNLEFT', 'LEFT', 'UPLEFT', 'UPRIGHT', 'RIGHT', 'DOWNRIGHT')
+ circle_in_map = True
+ distance = 1
+ first_direction = 'RIGHT'
+ yx = yx[:]
+ #print('DEBUG CIRCLE_OUT', yx)
+ while circle_in_map:
+ circle_in_map = False
+ move(yx, 'RIGHT')
+ for dir_i in range(len(directions)):
+ for hex_i in range(distance):
+ direction = directions[dir_i]
+ if move(yx, direction):
+ f(yx, distance, dir_i, hex_i)
+ circle_in_map = True
+ distance += 1
+
+