feat(sim): world aggregation and update loop
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dualfroz committed
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import random
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from .. import constants
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from ..constants import tileSize
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from .level import loadLevel
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from .player import Player
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from .enemies import spawnEnemy
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from .items import Collectible
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from .movingPlatform import MovingPlatform
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from .particles import ParticleSystem
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from .audio import AudioBus
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from .camera import Camera
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from . import physics
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class World:
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def __init__(self, levelSource, rng=None):
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self.level = loadLevel(levelSource)
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self.rng = rng if rng is not None else random.Random(9001)
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self.player = Player(*self.level.playerSpawn)
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self.enemies = [spawnEnemy(spawn) for spawn in self.level.enemies]
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self.items = [Collectible.fromSpawn(spawn) for spawn in self.level.items]
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self.platforms = [MovingPlatform.fromSpawn(spawn) for spawn in self.level.platforms]
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self.projectiles = []
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self.particles = ParticleSystem(rng=self.rng)
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self.audio = AudioBus()
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self.camera = Camera(
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constants.viewWidth,
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constants.viewHeight,
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self.level.pixelWidth(),
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self.level.pixelHeight(),
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)
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self.camera.focusOn(self.player.centerX, self.player.centerY)
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self.score = 0
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self.coins = 0
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self.lives = constants.startingLives
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self.frame = 0
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self.gameOver = False
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self.completed = False
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self.active = True
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self.activatedCheckpoints = set()
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def playSound(self, name, x=None):
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self.audio.play(name, x)
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def spawnBurst(self, preset, x, y, count=None):
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self.particles.emit(preset, x, y, count)
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def spawnProjectile(self, projectile):
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self.projectiles.append(projectile)
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def step(self, command):
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if not self.active:
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return
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self.frame += 1
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self.audio.tick()
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for platform in self.platforms:
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platform.update()
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self.carryRider(self.player)
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self.player.update(self, command)
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for enemy in self.enemies:
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if enemy.alive:
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enemy.update(self)
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for projectile in self.projectiles:
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if projectile.alive:
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projectile.update(self)
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self.resolveEnemyCollisions()
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self.resolveProjectileCollisions()
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self.resolveItemCollisions()
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self.resolveHazards()
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self.resolveCheckpoints()
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self.resolveExit()
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self.enemies = [enemy for enemy in self.enemies if enemy.alive]
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self.projectiles = [proj for proj in self.projectiles if proj.alive]
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for item in self.items:
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item.update()
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self.particles.update()
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self.handlePlayerDeath()
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self.camera.update(self.player.centerX, self.player.centerY)
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def carryRider(self, rider):
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platform = rider.groundPlatform
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if platform is not None and platform in self.platforms:
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rider.x += platform.deltaX
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rider.y += platform.deltaY
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def resolveEnemyCollisions(self):
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if not self.player.alive:
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return
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playerBox = self.player.hurtBox()
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for enemy in self.enemies:
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if not enemy.alive:
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continue
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if not playerBox.intersects(enemy.hurtBox()):
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continue
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fallingOnto = (
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enemy.stompable
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and self.player.vy > 0.0
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and (self.player.bottom - enemy.top) < enemy.h * 0.7
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and self.player.centerY < enemy.centerY
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)
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if fallingOnto:
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enemy.onStomped(self)
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self.player.vy = constants.stompBounce
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self.player.airJumps = constants.maxAirJumps
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self.player.score += 100
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self.score += 100
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self.playSound("stomp", enemy.centerX)
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self.camera.addShake(6, 1.5)
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elif not self.player.isInvulnerable():
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self.player.takeDamage(enemy.contactDamage, enemy.centerX, self)
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self.camera.addShake(10, 2.5)
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def resolveProjectileCollisions(self):
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if not self.player.alive:
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return
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playerBox = self.player.hurtBox()
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for projectile in self.projectiles:
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if not projectile.alive or projectile.owner != "enemy":
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continue
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if playerBox.intersects(projectile.aabb):
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projectile.alive = False
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if not self.player.isInvulnerable():
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self.player.takeDamage(projectile.damage, projectile.centerX, self)
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self.camera.addShake(8, 2.0)
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def resolveItemCollisions(self):
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if not self.player.alive:
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return
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playerBox = self.player.aabb
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for item in self.items:
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if item.collected:
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continue
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if playerBox.intersects(item.aabb):
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item.collect(self.player, self)
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def resolveHazards(self):
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if not self.player.alive:
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return
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damage = physics.hazardOverlap(self.player, self.level)
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if damage > 0 and not self.player.isInvulnerable():
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self.player.takeDamage(damage, self.player.centerX, self)
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self.camera.addShake(10, 2.5)
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def resolveCheckpoints(self):
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for index, point in enumerate(self.level.checkpoints):
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if index in self.activatedCheckpoints:
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continue
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checkpointBox = self.level.rectFor(int(point[0] // tileSize), int(point[1] // tileSize))
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if self.player.aabb.intersects(checkpointBox):
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self.activatedCheckpoints.add(index)
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self.player.setCheckpoint(point[0], point[1])
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self.playSound("checkpoint", point[0])
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self.spawnBurst("pickup", point[0] + tileSize * 0.5, point[1], 6)
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def resolveExit(self):
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if self.level.exit is None or self.completed:
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return
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exitCol = int(self.level.exit[0] // tileSize)
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exitRow = int(self.level.exit[1] // tileSize)
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exitBox = self.level.rectFor(exitCol, exitRow)
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if self.player.alive and self.player.aabb.intersects(exitBox):
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self.completed = True
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self.playSound("levelComplete", self.level.exit[0])
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def handlePlayerDeath(self):
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fellOut = self.player.top > self.level.pixelHeight() + tileSize * 2
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if fellOut and self.player.alive:
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self.player.alive = False
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self.playSound("die", self.player.centerX)
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if self.player.alive:
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return
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self.lives -= 1
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if self.lives <= 0:
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self.lives = 0
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self.gameOver = True
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self.active = False
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return
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self.player.hp = self.player.maxHp
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self.player.respawn()
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self.projectiles = []
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self.camera.focusOn(self.player.centerX, self.player.centerY)
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