hytopia-entities
Helps create and manage entities in HYTOPIA SDK games. Use when users need to create game objects, NPCs, items, or any interactive objects. Covers Entity class, spawn/despawn, components, animations, and lifecycle management.
Full skill instructions
This skill helps you create and manage entities in HYTOPIA SDK games.
Use this skill when the user:
import { Entity } from 'hytopia';
class MyEntity extends Entity {
constructor() {
super();
// Initialize entity properties
}
onSpawn() {
// Called when entity is spawned into the world
}
onDespawn() {
// Called when entity is removed from the world
}
tick(deltaTime: number) {
// Called every frame - use for continuous updates
}
}
// Spawn an entity in the world
const entity = new MyEntity();
world.spawnEntity(entity, {
position: { x: 0, y: 10, z: 0 },
rotation: { x: 0, y: 0, z: 0 }
});
// Despawn when done
world.despawnEntity(entity);
import { Entity, Model } from 'hytopia';
class ItemEntity extends Entity {
constructor() {
super();
this.model = new Model({
modelUri: 'models/sword.gltf',
scale: 0.5
});
}
}
import { Entity, PhysicsComponent, HealthComponent } from 'hytopia';
class EnemyEntity extends Entity {
constructor() {
super();
// Add physics
this.addComponent(new PhysicsComponent({
mass: 10,
colliders: [/* collision shapes */]
}));
// Add health
this.addComponent(new HealthComponent({
maxHealth: 100,
currentHealth: 100
}));
}
}
tick(deltaTime: number) {
const player = world.getClosestPlayer(this.position);
if (player) {
const direction = player.position.subtract(this.position).normalize();
this.position.add(direction.multiply(5 * deltaTime));
}
}
class Projectile extends Entity {
velocity: Vector3;
lifetime: number = 5;
tick(deltaTime: number) {
this.position.add(this.velocity.multiply(deltaTime));
this.lifetime -= deltaTime;
if (this.lifetime <= 0) {
world.despawnEntity(this);
}
}
}
onDespawn() - remove event listeners, stop soundstick() sparingly - expensive operations every frame hurt performancesuper() in constructor
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