Power Up: Drone
Again, we'll use Vectr to draw the drone. By now, you should be pretty used to Vectr, and I'm not using any new techniques to draw my drone, so I'll just leave you with a sample image and you can go ahead and design your own drone.
The drone looks best if it's smaller than the player ship. Beyond that, it's really up to you. My own drone isn't exactly fantastic, so I'm sure you can do better.
Adding the Drone
Since we are expecting only one drone, we won't need a list for it.
drone = Actor('drone')
We need to keep track of whether we have picked up the strawberry power up, so we'll add in a new variable. We'll set this variable to False at the start of the game (...haven't picked up powerup yet).
powerup2 = False
Look for this code in your program...
if powerups[hit].image == 'powerup2':
powerup1 += 1
That's where we detect the type of powerup that we've picked up. We are going to modify it to detect the strawberry powerup.
if powerups[hit].image == 'powerup2':
powerup1 += 1
elif powerups[hit].image == 'powerup3':
powerup2 = True
Since we are modifying powerup2, be sure to declare it as global...
global bullet_delay, powerup1, powerup2
We only draw our drone if we powerup2 is True. So add this to your draw() function.
if powerup2: // This is the same as writing: if powerup2 == True:
drone.draw()
We want our drone to follow our ship, so add this to the update() function.
drone.move_towards(player, 3)
Making it Shoot
The code to make the drone shoot is similar to that for the player. To keep it neat, we should put it inside our shoot() function, together with the rest of the shoot code.
if powerup2:
bullet = Actor('player_bullet')
bullet.x = drone.x
bullet.y = drone.y
bullet.angle = 90
bullets.append(bullet)
The only difference here is that the bullet's x and y starts at the drone rather than at the player.
At this Point...
Right now, both your power ups should be completed. You can add more powerups if you like, and there will be some ideas for that in the challenges section at the end. Your code at this point should look like this.
import pgzrun
import random
from pgzhelper import *
WIDTH=800
HEIGHT=600
player = Actor('player')
player.x = 400
player.y = 500
drone = Actor('drone')
bullets = []
bullet_delay = 0
background_images = ['background1','background2','background3']
backgrounds = []
background = Actor(random.choice(background_images))
background.x = 400
background.y = 300
backgrounds.append(background)
background = Actor(random.choice(background_images))
background.x = 400
background.y = -300
backgrounds.append(background)
enemies = []
explosions = []
enemy_bullets = []
powerups = []
powerup_images = ['powerup1', 'powerup2', 'powerup3']
powerup1 = 0
powerup2 = False
sounds.main_theme.play(-1)
def shoot():
global bullet_delay
sounds.sfx_sounds_interaction25.play()
bullet_delay = 5
if powerup1 == 0:
bullet = Actor('player_bullet')
bullet.x = player.x
bullet.y = player.y
bullet.angle = 90
bullets.append(bullet)
elif powerup1 == 1:
bullet = Actor('player_bullet')
bullet.x = player.x - 15
bullet.y = player.y
bullet.angle = 90
bullets.append(bullet)
bullet = Actor('player_bullet')
bullet.x = player.x + 15
bullet.y = player.y
bullet.angle = 90
bullets.append(bullet)
elif powerup1 == 2:
bullet = Actor('player_bullet')
bullet.x = player.x
bullet.y = player.y
bullet.angle = 110
bullets.append(bullet)
bullet = Actor('player_bullet')
bullet.x = player.x
bullet.y = player.y
bullet.angle = 90
bullets.append(bullet)
bullet = Actor('player_bullet')
bullet.x = player.x
bullet.y = player.y
bullet.angle = 70
bullets.append(bullet)
elif powerup1 == 3:
bullet = Actor('player_bullet')
bullet.x = player.x
bullet.y = player.y
bullet.angle = 110
bullets.append(bullet)
bullet = Actor('player_bullet')
bullet.x = player.x - 15
bullet.y = player.y
bullet.angle = 90
bullets.append(bullet)
bullet = Actor('player_bullet')
bullet.x = player.x + 15
bullet.y = player.y
bullet.angle = 90
bullets.append(bullet)
bullet = Actor('player_bullet')
bullet.x = player.x
bullet.y = player.y
bullet.angle = 70
bullets.append(bullet)
elif powerup1 >= 4:
bullet = Actor('player_bullet')
bullet.x = player.x
bullet.y = player.y
bullet.angle = 115
bullets.append(bullet)
bullet = Actor('player_bullet')
bullet.x = player.x
bullet.y = player.y
bullet.angle = 100
bullets.append(bullet)
bullet = Actor('player_bullet')
bullet.x = player.x
bullet.y = player.y
bullet.angle = 90
bullets.append(bullet)
bullet = Actor('player_bullet')
bullet.x = player.x
bullet.y = player.y
bullet.angle = 80
bullets.append(bullet)
bullet = Actor('player_bullet')
bullet.x = player.x
bullet.y = player.y
bullet.angle = 65
bullets.append(bullet)
if powerup2:
bullet = Actor('player_bullet')
bullet.x = drone.x
bullet.y = drone.y
bullet.angle = 90
bullets.append(bullet)
def update():
global bullet_delay, powerup1, powerup2
if keyboard.up:
player.y -= 5
if keyboard.down:
player.y += 5
if keyboard.right:
player.x += 5
if keyboard.left:
player.x -= 5
if player.x < 25:
player.x = 25
if player.x > 775:
player.x = 775
if player.y < 30:
player.y = 30
if player.y > 570:
player.y = 570
drone.move_towards(player, 3)
if keyboard.space and bullet_delay == 0:
shoot()
if bullet_delay > 0:
bullet_delay -= 1
for bullet in bullets:
bullet.move_forward(15)
if bullet.y < 0:
bullets.remove(bullet)
for background in backgrounds:
background.y += 3
if background.y > 900:
background.y -= 1200
background.image = random.choice(background_images)
if random.randint(0, 1000) > 980:
enemy = Actor('enemy1_1')
enemy.images = ['enemy1_1', 'enemy1_2']
enemy.fps = 5
enemy.y = -50
enemy.x = random.randint(100, 700)
enemy.direction = random.randint(-100, -80)
enemies.append(enemy)
if random.randint(0, 1000) > 998:
powerup = Actor('powerup1')
powerup.y = -50
powerup.x = random.randint(100, 700)
powerups.append(powerup)
for powerup in powerups:
powerup.y += 4
for enemy in enemies:
enemy.move_in_direction(4)
enemy.animate()
if random.randint(0, 1000) > 990:
bullet = Actor('enemy_bullet')
bullet.x = enemy.x
bullet.y = enemy.y
bullet.angle = random.randint(0, 359)
enemy_bullets.append(bullet)
if enemy.y > 700:
enemies.remove(enemy)
for bullet in bullets:
hit = bullet.collidelist(enemies)
if hit != -1:
bullets.remove(bullet)
explosion = Actor('explosion1')
explosion.x = enemies[hit].x
explosion.y = enemies[hit].y
explosion.images = ['explosion1', 'explosion2']
explosion.fps = 8
explosion.life = 15
explosions.append(explosion)
enemies.remove(enemies[hit])
for bullet in enemy_bullets:
bullet.move_forward(5)
if bullet.x < 0 or bullet.x > 800 or bullet.y < 0 or bullet.y > 600:
enemy_bullets.remove(bullet)
for explosion in explosions:
explosion.animate()
explosion.life -= 1
if explosion.life == 0:
explosions.remove(explosion)
for powerup in powerups:
hit = powerup.collidelist(bullets)
if hit != -1:
powerup.y -= 40
powerup.image = random.choice(powerup_images)
bullets.remove(bullets[hit])
hit = player.collidelist(powerups)
if hit != -1:
sounds.sfx_sounds_fanfare3.play()
if powerups[hit].image == 'powerup2':
powerup1 += 1
elif powerups[hit].image == 'powerup3':
powerup2 = True
powerups.remove(powerups[hit])
def draw():
screen.clear()
for background in backgrounds:
background.draw()
for explosion in explosions:
explosion.draw()
for bullet in enemy_bullets:
bullet.draw()
for enemy in enemies:
enemy.draw()
for powerup in powerups:
powerup.draw()
if powerup2:
drone.draw()
player.draw()
for bullet in bullets:
bullet.draw()
pgzrun.go() # Must be last line