Instantiate Random entity from EntityGroup?

Is there a way to instantiate a random entity from an entity group instead of spawning the entire group? I know there are prefabs now, but it is much simpler in my case to have a single prefab and simply change the sprite than to create multiple prefabs.

 

I could of misunderstood what your asking but if you want to spawn a single entity from an entity group you can do this,

Code (JavaScript):

1. ut.EntityGroup.instantiate(world, entityGroup)[entityIndex]

a full function for doing it with a transform position could look like this

Code (JavaScript):

1.     export function Spawn(world: ut.World, entityGroup: string, position: Vector3 = null, entityIndex: number = 0) {
2.  
3.         let ent = ut.EntityGroup.instantiate(world, entityGroup)[entityIndex];
4.  
5.         if (position != null) {
6.             world.usingComponentData(ent, [ut.Core2D.TransformLocalPosition], (transformLocalPosition) => {
7.  
8.                 transformLocalPosition.position = position;
9.             });
10.         }
11.         return ent;
12.     }

 

This actually does not just spawn a single entity from an entityGroup, but rather spawns the entire entityGroup and returns just the entity at the given index. If you don't add the

[entityIndex]

, the function returns a full list with all spawned entities of the entityGroup.


It's probably best to do as raymond suggested: to make entity""Groups"" with one entity (which would be the random entity you want to spawn) and then choose the random entity by first selecting a random string (entityGroup name) and instantiating the entityGroup from that random string.
You could for example make a component that has an array field of strings representing your random entities by entityGroup name. Your code could then pick a random value from this component to spawn your entity.