Comments (5)
type_ids
is ordered in the same way as types
, i.e. using impl Ord for TypeInfo
which compares alignment, whereas index
is ordered by TypeId
to perform look-ups by TypeId
.
IIRC, the type_ids
field itself is only necessary to enable passing &[TypeId]
(in contrast to &[TypeInfo]
) in component order (meaning as stored in the archetype, meaning as sorted by TypeInfo
).
from hecs.
It doesn't. All component arrays are densely packed.
from hecs.
Thank you for your time!
from hecs.
(Also note that generally the cost of creating an Archetype
should not be too critical as well, since if you have a workload that continuously creates new archetypes, an archetype-based ECS like hecs
is probably not a good fit in the first place.)
from hecs.
Okay thank you very much!
If I may follow with an additional question: I have not looked at the code in depth, but it is not obvious to me why the data field stores every Data
struct with an alignment of max_align
(meaning the biggest alignment of all of the components present in the archetype). I probably do not understand correctly the Data
struct, but it seems to me like since every component is stored in a separate array, then we could reduce space usage by using the alignment of every respective component.
from hecs.
Related Issues (20)
- [Question/Clarification] Are bundles suppose to be able to be used as queries? HOT 2
- Ability to create a query view directly from `World` HOT 5
- Component cloning HOT 4
- Determinism through serialization cycle HOT 10
- Is it possible to clone World? With use case. HOT 6
- Queries that add/remove components HOT 1
- derive(Query) doesn't support query transformers
- Multithreading HOT 2
- Confused with different query methods HOT 4
- Missing null pointer check in archetype grow function. HOT 3
- Less than ideal codegen for iteration HOT 2
- !Sync + !Send Component HOT 2
- Document CommandBuffer.remove() will not remove any if it does not match all components
- Add ability to take components off a `TakenEntity` HOT 5
- hecs::Query should handle type parameters HOT 2
- Query by DynamicBundle HOT 3
- Entity Relationships HOT 7
- How do you run commands after performing a query? HOT 3
- (De)Serialization example HOT 1
- WASM / Parallelism in WASM support? HOT 1
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