def fire(self):
"""
The calculations used to determine how a bullet will fire from the player.
Inputs
============================================================================
None
Outputs
============================================================================
None
"""
# Angle of attack
angle_radians = math.pi / 2 - math.radians(self.rotation)
# Starting position
ship_radius = self.image.width / 2
bullet_x = self.x + math.cos(angle_radians) * ship_radius
bullet_y = self.y + math.sin(angle_radians) * ship_radius
# Creating the bullet
new_bullet = bullet.Bullet(bullet_x, bullet_y, batch=self.batch)
# Velocity
bullet_vx = (self.velocity_x +
math.cos(angle_radians) * self.bullet_speed)
bullet_vy = (self.velocity_y +
math.sin(angle_radians) * self.bullet_speed)
new_bullet.velocity_x = bullet_vx
new_bullet.velocity_y = bullet_vy
# Adding the to the draw list
self.new_objects.append(new_bullet)
def fire(self):
angle_radians = -math.radians(self.rotation)
ship_radius = self.image.width / 2
bullet_x = self.x + math.cos(angle_radians) * ship_radius
bullet_y = self.y + math.sin(angle_radians) * ship_radius
new_bullet = bullet.Bullet(bullet_x, bullet_y, batch=self.batch)
bullet_vx = (self.velocity_x +
math.cos(angle_radians) * self.bullet_speed)
bullet_vy = (self.velocity_y +
math.sin(angle_radians) * self.bullet_speed)
new_bullet.velocity_x = -bullet_vx
new_bullet.velocity_y = -bullet_vy
self.new_objects.append(new_bullet)
def fire(self):
angle_radian = -math.radians(self.rotation)
ship_radius = self.image.width / 2 + 20
bullet_x = self.x + ship_radius * math.cos(angle_radian)
bullet_y = self.y + ship_radius * math.sin(angle_radian)
new_bullet = bullet.Bullet(x=bullet_x, y=bullet_y, batch=self.batch)
bullet_vx = self.velocity_x + self.bullet_speed * math.cos(
angle_radian)
bullet_vy = self.velocity_y + self.bullet_speed * math.sin(
angle_radian)
new_bullet.velocity_x = bullet_vx
new_bullet.velocity_y = bullet_vy
self.new_objects.append(new_bullet)
def fire(self):
"发射子弹"
angle_radians = -math.radians(self.rotation) #将角度转换成弧度并逆转方向
"计算子弹的位置并实例化它"
ship_radius = self.image.width // 2
bullet_x = self.x + math.cos(angle_radians) * ship_radius
bullet_y = self.y + math.sin(angle_radians) * ship_radius
new_bullet = bullet.Bullet(bullet_x, bullet_y, batch=self.batch)
"子弹速度的计算"
bullet_vx = self.velocity_x + math.cos(
angle_radians) * self.bullet_speed
bullet_vy = self.velocity_y + math.sin(
angle_radians) * self.bullet_speed
new_bullet.velocity_x, new_bullet.velocity_y = bullet_vx, bullet_vy
"把子弹加到new_objects列表，主循环会把它加到game_objects中"
self.new_objects.append(new_bullet)
resources.bullet_sound.play()
def fire_bullet(ai_settings, screen, ship, bullets):
# 创建子弹加入编组
if len(bullets) < ai_settings.bullet_allowed:
new_bullet = bullet.Bullet(ai_settings, screen, ship)
bullets.add(new_bullet)