Dawn
Lesson 18 of 20 in Coddy's Pygame Project: Hold the Keep course.
Now the night can be won. When night.time reaches NIGHT the sun comes up, the state becomes "won" and the loop stops updating, as it does for a loss.
Make the dawn something the player sees coming. Lay a see-through dark blue over the courtyard, at 120 of 255 all night, and fade it out over the last minute. Make the shade Surface once, before the loop, like the cover, and fill it each frame:
dark = min(120, max(0, NIGHT - night.time) * 120 // (60 * 60))
shade.fill((10, 10, 40, dark))
screen.blit(shade, (0, 0))With 30 seconds left, 1800 * 120 // 3600 is 60: half as dark. Draw the shade after the knight and the axes but before the bolts and the top bar, so the magic and the hearts shine through the dark.
Challenge
Medium- At the end of
update: whenself.time >= NIGHTwhile playing, setself.state = "won". - Before the loop make
shade, a window-sizedSRCALPHASurface, anddark_cover, one filled with(0, 0, 0, 210). Draw the shade as above after the axes and before the bolts. - In
"won"and"lost"blitdark_coverfirst; in"won"show"Dawn! The keep holds"in gold big letters at (360, 200).
Try it yourself
import random
import pygame
WIDTH, HEIGHT = 720, 480
TILE = 48
NIGHT = 60 * 60 * 4
BOSS_AT = NIGHT - 60 * 60
WAVES = [
["slime"],
["slime", "bat"],
["slime", "bat", "spider"],
["bat", "spider"],
["slime", "spider", "ghost"],
["bat", "spider", "ghost"],
["spider", "ghost"],
["bat", "ghost"],
]
UPGRADES = {
"Quick bolts": "Bolts fire more often",
"Sharp bolts": "Bolts hit harder",
"Spinning axe": "One more axe circles you",
"Swift boots": "You walk faster",
"Gem magnet": "Gems come from further",
"Hearty meal": "Get back a heart",
}
WHITE = (240, 240, 240)
BOLT = (120, 200, 255)
GOLD = (250, 200, 60)
pygame.init()
screen = pygame.display.set_mode((WIDTH, HEIGHT))
pygame.display.set_caption("Hold the Keep")
clock = pygame.time.Clock()
font = pygame.font.Font("assets/fonts/pixel.ttf", 24)
small_font = pygame.font.Font("assets/fonts/pixel.ttf", 16)
big_font = pygame.font.Font("assets/fonts/pixel.ttf", 48)
def load(name):
return pygame.image.load("assets/images/" + name).convert_alpha()
def sound(name):
return pygame.mixer.Sound("assets/sounds/" + name)
def whiten(image):
white = image.copy()
white.fill((255, 255, 255), special_flags=pygame.BLEND_RGB_MAX)
return white
floor_img = load("floor.png")
wall_img = load("wall.png")
knight_img = load("knight.png")
axe_img = load("axe.png")
gem_img = load("gem.png")
heart_img = load("heart.png")
empty_img = load("heart_empty.png")
MONSTERS = {
"slime": {"image": load("slime.png"), "speed": 1.0, "hp": 1, "size": 28},
"bat": {"image": load("dungeon_bat.png"), "speed": 1.6, "hp": 1, "size": 28},
"spider": {"image": load("spider.png"), "speed": 1.2, "hp": 3, "size": 28},
"ghost": {"image": load("ghost.png"), "speed": 0.8, "hp": 4, "size": 28},
"boss": {"image": pygame.transform.scale(load("ghost.png"), (96, 96)), "speed": 0.7, "hp": 120, "size": 64},
}
hit_sound = sound("hit.ogg")
hurt_sound = sound("thud.ogg")
gem_sound = sound("coin.ogg")
level_sound = sound("powerup.ogg")
courtyard = pygame.Rect(TILE, TILE, WIDTH - 2 * TILE, HEIGHT - 2 * TILE)
background = pygame.Surface((WIDTH, HEIGHT))
for row in range(HEIGHT // TILE):
for col in range(WIDTH // TILE):
x = col * TILE
y = row * TILE
if courtyard.collidepoint(x, y):
background.blit(floor_img, (x, y))
else:
background.blit(wall_img, (x, y))
cover = pygame.Surface((WIDTH, HEIGHT), pygame.SRCALPHA)
cover.fill((0, 0, 0, 150))
def draw(image, center):
screen.blit(image, image.get_rect(center=center))
def clock_text(frames):
seconds = frames // 60
return f"{seconds // 60}:{seconds % 60:02d}"
def edge_point():
side = random.randint(0, 3)
if side == 0:
return (random.randint(0, WIDTH), -24)
if side == 1:
return (random.randint(0, WIDTH), HEIGHT + 24)
if side == 2:
return (-24, random.randint(0, HEIGHT))
return (WIDTH + 24, random.randint(0, HEIGHT))
class Knight(pygame.sprite.Sprite):
def __init__(self):
super().__init__()
self.image = knight_img
self.rect = pygame.Rect(0, 0, 24, 24)
self.rect.center = courtyard.center
self.speed = 3
self.hearts = 5
self.max_hearts = 5
self.hurt = 0
self.bolt_wait = 30
self.bolt_damage = 1
self.axes = 1
self.magnet = 80
def move(self, keys):
if keys[pygame.K_LEFT]:
self.rect.x -= self.speed
if keys[pygame.K_RIGHT]:
self.rect.x += self.speed
if keys[pygame.K_UP]:
self.rect.y -= self.speed
if keys[pygame.K_DOWN]:
self.rect.y += self.speed
self.rect.clamp_ip(courtyard)
class Monster(pygame.sprite.Sprite):
def __init__(self, kind, pos):
super().__init__()
self.kind = kind
self.image = MONSTERS[kind]["image"]
self.speed = MONSTERS[kind]["speed"]
self.hp = MONSTERS[kind]["hp"]
self.axe_wait = 0
self.flash = 0
self.pos = pygame.Vector2(pos)
self.rect = pygame.Rect(0, 0, MONSTERS[kind]["size"], MONSTERS[kind]["size"])
self.rect.center = self.pos
def update(self, target):
step = pygame.Vector2(target) - self.pos
if step.length() > 0:
self.pos += step.normalize() * self.speed
self.rect.center = self.pos
if self.axe_wait > 0:
self.axe_wait -= 1
if self.flash > 0:
self.flash -= 1
def hit(self, damage):
self.hp -= damage
self.flash = 6
hit_sound.play()
class Bolt(pygame.sprite.Sprite):
def __init__(self, start, target, damage):
super().__init__()
self.pos = pygame.Vector2(start)
step = pygame.Vector2(target) - self.pos
if step.length() == 0:
step = pygame.Vector2(1, 0)
self.velocity = step.normalize() * 7
self.damage = damage
self.rect = pygame.Rect(0, 0, 10, 10)
self.rect.center = self.pos
def update(self):
self.pos += self.velocity
self.rect.center = self.pos
if not screen.get_rect().colliderect(self.rect):
self.kill()
class Gem(pygame.sprite.Sprite):
def __init__(self, pos):
super().__init__()
self.rect = pygame.Rect(0, 0, 24, 24)
self.rect.center = pos
self.rect.clamp_ip(courtyard)
self.pos = pygame.Vector2(self.rect.center)
def update(self, knight):
target = pygame.Vector2(knight.rect.center)
if self.pos.distance_to(target) < knight.magnet:
self.pos.move_towards_ip(target, 6)
self.rect.center = self.pos
class Night:
def __init__(self):
self.knight = Knight()
self.time = 0
self.monsters = pygame.sprite.Group()
self.bolts = pygame.sprite.Group()
self.bolt_timer = 0
self.spin = 0
self.gems = pygame.sprite.Group()
self.xp = 0
self.level = 1
self.need = 5
self.choices = []
self.pick = 0
self.boss = None
self.state = "playing"
def wave(self):
return min(len(WAVES), self.time * len(WAVES) // NIGHT + 1)
def spawn(self):
wave = self.wave()
if self.time % max(16, 46 - wave * 5) == 0:
kind = random.choice(WAVES[wave - 1])
self.monsters.add(Monster(kind, edge_point()))
if self.boss is None and self.time >= BOSS_AT:
self.boss = Monster("boss", (WIDTH // 2, -40))
self.monsters.add(self.boss)
boss = self.boss
if boss and boss.alive() and boss.hp < MONSTERS["boss"]["hp"] // 2:
if self.time % 120 == 0:
for _ in range(3):
offset = (random.randint(-50, 50), random.randint(-50, 50))
self.monsters.add(Monster("bat", boss.pos + offset))
def nearest(self):
point = pygame.Vector2(self.knight.rect.center)
best = None
for monster in self.monsters:
if best is None or point.distance_to(monster.pos) < point.distance_to(best.pos):
best = monster
return best
def shoot(self):
self.bolt_timer += 1
target = self.nearest()
if self.bolt_timer >= self.knight.bolt_wait and target is not None:
self.bolt_timer = 0
bolt = Bolt(self.knight.rect.center, target.pos, self.knight.bolt_damage)
self.bolts.add(bolt)
def axe_spots(self):
spots = []
for i in range(self.knight.axes):
angle = self.spin + i * 360 / self.knight.axes
offset = pygame.Vector2(70, 0).rotate(angle)
spots.append(pygame.Vector2(self.knight.rect.center) + offset)
return spots
def hurt_monsters(self):
for bolt in self.bolts:
target = pygame.sprite.spritecollideany(bolt, self.monsters)
if target is not None:
target.hit(bolt.damage)
bolt.kill()
for spot in self.axe_spots():
blade = pygame.Rect(0, 0, 36, 36)
blade.center = spot
for monster in self.monsters:
if monster.axe_wait == 0 and blade.colliderect(monster.rect):
monster.hit(1)
monster.axe_wait = 20
for monster in list(self.monsters):
if monster.hp <= 0:
monster.kill()
drops = 8 if monster.kind == "boss" else 1
for _ in range(drops):
self.gems.add(Gem(monster.pos))
def collect(self):
for gem in pygame.sprite.spritecollide(self.knight, self.gems, True):
self.xp += 1
gem_sound.play()
if self.xp >= self.need:
self.xp -= self.need
self.level += 1
self.need += 4
self.choices = random.sample(list(UPGRADES), 3)
self.pick = 1
self.state = "levelup"
level_sound.play()
def upgrade(self, name):
knight = self.knight
if name == "Quick bolts":
knight.bolt_wait = max(8, knight.bolt_wait - 8)
elif name == "Sharp bolts":
knight.bolt_damage += 1
elif name == "Spinning axe":
knight.axes += 1
elif name == "Swift boots":
knight.speed += 1
elif name == "Gem magnet":
knight.magnet += 40
elif name == "Hearty meal":
knight.hearts = min(knight.max_hearts, knight.hearts + 1)
self.state = "playing"
def take_hits(self):
knight = self.knight
if knight.hurt > 0:
knight.hurt -= 1
elif pygame.sprite.spritecollideany(knight, self.monsters):
knight.hearts -= 1
knight.hurt = 75
hurt_sound.play()
if knight.hearts <= 0:
self.state = "lost"
def update(self, keys):
self.time += 1
self.spin = (self.spin + 4) % 360
self.knight.move(keys)
self.spawn()
self.monsters.update(self.knight.rect.center)
self.bolts.update()
self.gems.update(self.knight)
self.shoot()
self.hurt_monsters()
self.collect()
self.take_hits()
night = Night()
running = True
while running:
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
elif event.type == pygame.KEYDOWN:
if night.state == "levelup":
if event.key == pygame.K_LEFT:
night.pick = (night.pick - 1) % 3
elif event.key == pygame.K_RIGHT:
night.pick = (night.pick + 1) % 3
elif event.key == pygame.K_SPACE:
night.upgrade(night.choices[night.pick])
if night.state == "playing":
night.update(pygame.key.get_pressed())
screen.blit(background, (0, 0))
knight = night.knight
for gem in night.gems:
draw(gem_img, gem.rect.center)
for monster in night.monsters:
if monster.flash > 0:
draw(whiten(monster.image), monster.rect.center)
else:
draw(monster.image, monster.rect.center)
if knight.hurt % 10 < 5:
draw(knight.image, knight.rect.center)
for spot in night.axe_spots():
draw(pygame.transform.rotate(axe_img, -night.spin * 3), spot)
for bolt in night.bolts:
pygame.draw.circle(screen, BOLT, bolt.rect.center, 5)
for i in range(knight.max_hearts):
if i < knight.hearts:
screen.blit(heart_img, (8 + i * 34, 6))
else:
screen.blit(empty_img, (8 + i * 34, 6))
left = font.render(clock_text(max(0, NIGHT - night.time)) + " until dawn", True, WHITE)
screen.blit(left, left.get_rect(center=(WIDTH // 2, 24)))
label = font.render(f"Level {night.level}", True, WHITE)
screen.blit(label, label.get_rect(topright=(WIDTH - 10, 4)))
pygame.draw.rect(screen, (40, 40, 60), (WIDTH - 160, 30, 150, 10))
pygame.draw.rect(screen, GOLD, (WIDTH - 160, 30, 150 * night.xp // night.need, 10))
if night.state == "levelup":
screen.blit(cover, (0, 0))
title = big_font.render("Level up! Pick one", True, GOLD)
screen.blit(title, title.get_rect(center=(WIDTH // 2, 130)))
for i, name in enumerate(night.choices):
card = pygame.Rect(60 + i * 210, 190, 180, 120)
pygame.draw.rect(screen, (40, 40, 60), card)
if i == night.pick:
pygame.draw.rect(screen, GOLD, card, 4)
else:
pygame.draw.rect(screen, WHITE, card, 2)
text = font.render(name, True, WHITE)
screen.blit(text, text.get_rect(center=(card.centerx, card.y + 40)))
about = small_font.render(UPGRADES[name], True, WHITE)
screen.blit(about, about.get_rect(center=(card.centerx, card.y + 80)))
hint = font.render("Left and Right to choose, Space to take it", True, WHITE)
screen.blit(hint, hint.get_rect(center=(WIDTH // 2, 360)))
if night.state == "lost":
message = big_font.render("The keep has fallen", True, WHITE)
screen.blit(message, message.get_rect(center=(WIDTH // 2, 200)))
pygame.display.flip()
clock.tick(60)
pygame.quit()
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