PedrelliLuca
commented
2 years ago Grid system architecture - first draft
@startuml
skinparam sequenceArrowThickness 2
skinparam roundcorner 20
skinparam sequenceParticipant underline
skinparam linetype ortho
class UWorldSubsystem
struct FCellCoordinates {
+ bool operator==(const FCellCoordinates& other)
}
class UEnvironmentGridWorldSubsystem {
+ void PostInitialize() override
+ void OnCellEndOverlap(...)
--
- TMap<FCellCoordinates, TSet<FCellCoordinates>> _adjacencyList
- TMap<FCellCoordinates, TObjectPtr<AEnvironmentCell>> _cells
}
class AEnvironmentCell {
+ bool UnfreezeInTime()
+ bool FreezeInTime()
+ TWeakObjectPtr<UBoxComponent> GetBoxComponent()
+ const FCellCoordinates& GetCoordinates() const
+ void SetCoordinates(FCellCoordinates coordinates)
--
- FCellCoordinates _coordinates
- TObjectPtr<UBoxComponent> _boxC
}
class FEnvironmentCellCache
UWorldSubsystem <|-- UEnvironmentGridWorldSubsystem
UEnvironmentGridWorldSubsystem o-- AEnvironmentCell
AEnvironmentCell --> FCellCoordinates
UEnvironmentGridWorldSubsystem o-- FCellCoordinates
@enduml
What?
Add a system such that, based on the player character's location, the game:
Think of the map as a 2D grid. If the player character is standing in a given cell, then that cell and the 8 surrounding it are also active. The ones beyond can either be non-existent (they haven't been spawned yet) or cached (they have been spawned, but the player moved away from them and now they're not among the surrounding 8 anymore).
Why?
This system should help performance-wise. In my first iteration of the ScalarField prototype, a couple of years ago, I didn't develop this system: I had a single enormous air cell with a huge amount of "air molecule" actors. On a big map, that meant having hundreds of thousands of elements ticking in the scene to exchange heat, which caused the FPS to be extremely low.
By activating only the molecules closest to the player, the number of actors ticking simultaneously should become acceptable. By caching temperature-related data, I'll just need to reload such data and reactivate the cell if the player decides to revisit it.