void Spawn()
{
PrefabHolder prefabHolder = PrefabHolder.GetActive();
GameObject prefab = prefabHolder.prefab;
int numberToSpawn = prefabHolder.numberToSpawn;
float spawnAreaSize = prefabHolder.spawnAreaSize;
float accelerationScaler = prefabHolder.accelerationScaler;
Entity prefabEntity = GameObjectConversionUtility.ConvertGameObjectHierarchy(prefab, GameObjectConversionSettings.FromWorld(this.World, null));
EntityManager entityManager = this.World.EntityManager;
Unity.Mathematics.Random rand = new Unity.Mathematics.Random(0x6E624EB7u);
for (int i = 0; i < numberToSpawn; i++)
{
Entity instance = entityManager.Instantiate(prefabEntity);
float randomAngle = rand.NextFloat();
float randomRadius = rand.NextFloat();
float2 pointOnCircle = GetPointOnCircle(randomAngle) * randomRadius;
float3 randFloat3 = new float3(pointOnCircle.x, 0, pointOnCircle.y) * spawnAreaSize;
entityManager.SetComponentData(instance, new Translation {
Value = randFloat3
});
entityManager.SetComponentData(instance, new Acceleration {
Value = -randFloat3 * accelerationScaler
});
}
}
protected override void OnCreate()
{
m_Group = GetEntityQuery(typeof(Translation), typeof(Speed), typeof(UpdateOrder));
GameObject prefab = PrefabHolder.GetActive().prefab;
int numberToSpawn = PrefabHolder.GetActive().numberToSpawn;
Entity prefabEntity = GameObjectConversionUtility.ConvertGameObjectHierarchy(prefab, GameObjectConversionSettings.FromWorld(this.World, null));
for (int i = 0; i < numberToSpawn; i++)
{
Entity entity = EntityManager.Instantiate(prefabEntity);
UpdateOrder updateOrder = EntityManager.GetSharedComponentData <UpdateOrder>(entity);
updateOrder.Value = i % updateFrequency;
EntityManager.SetSharedComponentData(entity, updateOrder);
}
}