Territory Layer Update

[1brucben]

This pull request introduces significant optimizations and refactoring to the territory rendering and attack execution logic, aiming to improve performance and visual smoothness in the game client. The most impactful changes include switching to more efficient data structures for tile rendering, introducing caching to avoid expensive per-pixel computations, and updating attack processing to occur multiple times per tick for smoother territory transitions.

Rendering and Caching Optimizations:

• Replaced the PriorityQueue used for tileToRenderQueue in TerritoryLayer.ts with a Set<TileRef>, simplifying the queue management and improving performance. [1] [2] [3]
• Added per-tile caches (borderCache, defendedCache, and borderColorsCache) to avoid repeated expensive calculations for border and defense status during territory rendering. These caches are invalidated on relevant updates. [1] [2] [3] [4] [5]

Territory Highlighting and Offset Calculations:

• Refactored territory and spawn highlighting logic to use precomputed offset arrays instead of BFS with custom distance functions, reducing computational overhead and improving responsiveness. [1] [2] [3]

Attack Execution Smoothing:

• Updated attack execution so that attacks are processed six times per game tick instead of once, resulting in smoother territory changes. This required adjusting the number of tiles processed per subtick and updating the main game loop to handle attack executions separately from other actions. [1] [2] [3]

Code Cleanup:

• Removed unused imports and debug logging statements from TerritoryLayer.ts for clarity and maintainability. [1] [2]

These changes collectively enhance the game's visual performance and responsiveness, particularly during large-scale territory updates and attacks.