def add_tower(self, pos, cls):
tower = cls(pos, self)
if pygame.sprite.spritecollideany(tower, self.creeps):
raise BuildError, "Can't build on creeps"
buildcells = list(util.iterpoints(pos, (cls.size, cls.size)))
self.field.buildon(*buildcells)
# check if we block creeps
block_creeps = False
for creep in self.creeps:
if tuple(creep.current_cell()) not in self.field.dir_field:
block_creeps = True
break
for e in self.field._enters:
if e not in self.field.dir_field:
block_creeps = True
break
if block_creeps:
self.field.clearon(*buildcells)
raise BuildError, "Blocking"
tower.add([self.towers])
for creep in self.creeps:
creep.forget_way()
self.money -= tower.cost
def sell_tower(self, tower):
sizes = (tower.size, tower.size)
topleft = util.placeintrect(tower.g_pos, sizes)
cells = util.iterpoints(topleft, sizes)
self.field.clearon(*cells)
money = int(self.sell_factor * tower.cost)
message = '+%d' % money
self.money += money
self.messages.add(Message(message, 1, tower.g_pos, GOLD_COLOR))
tower.kill()
def build_tower(self, tower_cls, pos):
if tower_cls.cost > self.get_money():
raise BuildError, "Not enough money"
sizes = (tower_cls.size, tower_cls.size)
topleft = util.placeintrect(pos, sizes)
canbuild = all(
self.field.canbuildon(p)
for p in util.iterpoints(topleft, sizes))
if canbuild:
self.add_tower(topleft, tower_cls)
else:
raise BuildError, "Can't build here"