Comments (4)
benmoran56
commented on August 12, 2024
Sorry for not replying sooner. I didn't get notified of this issue ticket.
You can do this with the world.add_compoent method. There is a type_alias argument. For example:
entity1 = world.create_entity()
world.add_component(entity1, Lion(), type_alias=Animal)This means that you can't add components when creating an entity. You have to do it in two steps.
A full example:
import esper
world = esper.World()
# Base class:
class Animal: pass
class Lion(Animal): pass
class Tiger(Animal): pass
class Bear(Animal): pass
entity1 = world.create_entity()
world.add_component(entity1, Lion(), type_alias=Animal)
entity2 = world.create_entity()
world.add_component(entity2, Tiger(), type_alias=Animal)
entity3 = world.create_entity()
world.add_component(entity3, Bear(), type_alias=Animal)
for ent, animal in world.get_component(Animal):
print(ent, animal)from esper.
jason-bowen-zheng
commented on August 12, 2024
Can I use one more type likes type_alias=(Animal, Lion)?
from esper.
benmoran56
commented on August 12, 2024
No, that's not possible. It would be difficult to store in the DB, and difficult to query.
from esper.
benmoran56
commented on August 12, 2024
I'm going to close this for now, but please feel free to reply if you want to discuss further.
from esper.
Related Issues (20)
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- event handler as function HOT 4
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