Can relation components have fields?

[dvoyni]

Can relation components have fields to provide more context to relation, like that:
type RelComp struct { ecs.RelationMarker MyProp int }

If yes, how can i setup it? Since mapper provides only ability to set target entity:
relCompMap.SetRelations(entity, ecs.RelIdx(0, targetEntity))

[mlange-42]

Hi @dvoyni,
yes, relation components can have additional fields as in your example. These fields are handled just like in normal components, so you can e.g. initialize them when adding the component with MapX.Add or MapX.AddFn. Or you get the component using a query or mapper, and set fields by simple assignment. Note that the SetRelations method is only for changing targets of components that were already added, and does not allow to change field values in the same operation.

[dvoyni]

I see, thanks