105 lines
2.7 KiB
Python
105 lines
2.7 KiB
Python
import pgzrun
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import random
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import math
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WIDTH = 800
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HEIGHT = 600
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APPLE_POS = (WIDTH / 2, HEIGHT / 2)
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DINO_SPEED = 120
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START_SPAWN_INTERVAL = 2.0
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MIN_SPAWN_INTERVAL = 0.2
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SPAWN_ACCELERATION = 0.3
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CORPSE_LIFETIME = 2.0
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APPLE_HIT_RADIUS = 25
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apple = Actor("apple", APPLE_POS)
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sword = Actor("sword", APPLE_POS)
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dinosaurs = []
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corpses = []
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spawn_interval = START_SPAWN_INTERVAL
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spawn_timer = 0
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game_time = 0
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score = 0
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missed_apples = 0
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def on_mouse_move(pos, rel, buttons):
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"""Keep the sword centered on the mouse pointer."""
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sword.pos = pos
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def spawn_dinosaurs():
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"""Create a dinosaur just outside one edge of the screen."""
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dino_images = ("dino", "dino2")
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random_dino = random.choice(dino_images)
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dino = Actor(random_dino)
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side = random.randint(0, 3)
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if side == 0: # up
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dino.x = random.randint(0, WIDTH)
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dino.y = -50
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elif side == 1: # down
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dino.x = random.randint(0, WIDTH)
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dino.y = HEIGHT + 50
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elif side == 2: # left
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dino.x = -50
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dino.y = random.randint(0, HEIGHT)
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else:
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dino.x = WIDTH + 50
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dino.y = random.randint(0, HEIGHT)
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dinosaurs.append(dino)
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def update(dt):
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global spawn_timer, spawn_interval, game_time, score, missed_apples
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game_time += dt
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spawn_timer += dt
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# Gradually reduce the delay between spawns so the game gets harder.
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spawn_interval = max(MIN_SPAWN_INTERVAL, spawn_interval - SPAWN_ACCELERATION * dt)
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if spawn_timer >= spawn_interval:
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spawn_dinosaurs()
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spawn_timer = 0
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for dino in dinosaurs[:]:
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dx = apple.x - dino.x
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dy = apple.y - dino.y
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distance = math.hypot(dx, dy)
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# Move at a steady speed toward the apple instead of jumping farther
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# when the dinosaur is far away.
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if distance > 0:
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dino.x += (dx / distance) * DINO_SPEED * dt
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dino.y += (dy / distance) * DINO_SPEED * dt
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if dino.colliderect(sword):
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dino.image = "dead"
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corpses.append({"actor": dino, "die_time": game_time})
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sounds.hit.play()
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score += 1
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dinosaurs.remove(dino)
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elif distance <= APPLE_HIT_RADIUS:
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missed_apples += 1
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dinosaurs.remove(dino)
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for corpse in corpses[:]:
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if game_time - corpse["die_time"] >= CORPSE_LIFETIME:
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corpses.remove(corpse)
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def draw():
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screen.fill((100, 200, 100))
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apple.draw()
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for dino in dinosaurs:
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dino.draw()
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for corpse in corpses:
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corpse["actor"].draw()
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sword.draw()
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screen.draw.text(f"Score: {score}", (10, 10), fontsize=36, color="white")
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screen.draw.text(f"Missed: {missed_apples}", (10, 50), fontsize=36, color="white")
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pgzrun.go()
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