So far, the enemies in my game only fire straight down. I want to be able to aim at the player. This is my Enemy class's shoot method.
class Enemy(sprite.Sprite):
def shoot(self):
# Origin position, direction, speed
# Direction of (0,1) means straight down. 0 pixels along the x axis, and +1 pixel along the y axis
# Speed of (10,10) means that every frame, the object will move 10 px along the x and y axis.
self.bullets.shoot(self.rect.center, (0,1), (10,10))
self.bullets is an instance of my BulletPool class.
class BulletPool(sprite.Group):
def shoot(self, pos, direction, speed):
# Selects a bullet from the pool
default = self.add_bullet() if self.unlimited else None
bullet = next(self.get_inactive_bullets().__iter__(), default)
if bullet is None:
return False
# Sets up bullet movement
bullet.rect.center = pos
bullet.start_moving(direction)
bullet.set_speed(speed)
# Adds bullet to a Group of active bullets
self.active_bullets.add(bullet)
And here is my Bullet class.
class Bullet(sprite.Sprite):
def update(self):
self.move()
def set_speed(self, speed):
self.speed = Vector2(speed)
def start_moving(self, direction):
self.direction = Vector2(direction)
self.is_moving = True
def stop_moving(self):
self.is_moving = False
def move(self):
if self.is_moving:
x_pos = int(self.direction.x*self.speed.x)
y_pos = int(self.direction.y*self.speed.y)
self.rect = self.rect.move(x_pos,y_pos)
Using this, I can only make sprites go straight up (0,-1), down (0,1), left (-1,0) or right (1,0), as well as combining combining x and axes to make a 45 degree angle, (i.e. (1,1) is going down and right). I don't know how to angle something to make it go towards a particular direction other than these. Should I change the way I move my objects? I use the same methods to move my player, and it works perfectly when it's just taking controls from the arrow keys.
