我正在使用pygame在python中进行boids模拟。基本行为有效,但我现在正在尝试添加避障和捕食者。到目前为止,我很难弄清楚如何实现这些行为。
首先,我试图让猎物逃跑,让捕食者攻击。为了做到这一点,我需要以某种方式找到最接近的boid。我该怎么做?
另外,为了避开障碍物,有人可以解释一下我将如何让猎物避开但不主动逃离静态障碍物吗?
我的完整代码在这里(github)。我真的很感激关于我将如何完成这两件事的任何和所有解释。
谢谢!
编辑:
富卡斯向我展示了如何做到这一点,但现在我遇到了一个新问题。
对于捕食者和猎物的行为,我现在有这个:
def attack(self, prey_list):
nearest_prey = None
shortest_distance = None
for prey in prey_list:
distX = self.rect.x - prey.rect.x
distY = self.rect.y - prey.rect.y
d = distX*distX+distY*distY
if not shortest_distance or d < shortest_distance:
shortest_distance = d
nearest_prey = prey
# do something with nearest_prey, shortest_distance
trajectory_x = self.rect.x - nearest_prey.rect.x
trajectory_y = self.rect.y - nearest_prey.rect.y
self.velocityX -= trajectory_x
self.velocityY -= trajectory_y
而这个给猎物:
def defend(self, predator_list):
nearest_predator = None
shortest_distance = None
for predator in predator_list:
distX = self.rect.x - predator.rect.x
distY = self.rect.y - predator.rect.y
d = distX*distX+distY*distY
if not shortest_distance or d < shortest_distance:
shortest_distance = d
nearest_predator = predator
# do something with nearest_prey, shortest_distance
trajectory_x = self.rect.x - nearest_predator.rect.x
trajectory_y = self.rect.y - nearest_predator.rect.y
self.velocityX += trajectory_x
self.velocityY += trajectory_y
(此代码在所有其他规则之后最后应用)。
要找到最短的距离,您可以这样做
def attack(self, prey_list):
d_list = []
for prey in prey_list:
distX = self.rect.x - prey.rect.x
distY = self.rect.y - prey.rect.y
d = distX*distX+distY*distY
d_list.append(d)
shortest_distance = min(d_list)
为了获得最短的距离和猎物,你可以做到
def attack(self, prey_list):
nearest_prey = None
shortest_distance = None
for prey in prey_list:
distX = self.rect.x - prey.rect.x
distY = self.rect.y - prey.rect.y
d = distX*distX+distY*distY
if not shortest_distance or d < shortest_distance
shortest_distance = d
nearest_prey = prey
# do something with nearest_prey, shortest_distance
print nearest_prey, shortest_distance