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The Ultimate Multiplayer Farming System (UMFS) is a modular, data-driven farming system: crop growth stages, soil moisture simulation, seasonal growth gating, multi-harvest crops, off-season crop death, and crop disease — with soft integration hooks for any time, weather, inventory, or skill plugin. Multiplayer-ready with full replication. The system is component-based: attach UFarmingComponent to any actor (for example, a farm plot actor from your building system) to make it a functional farm plot.

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Key Features

  • Data-driven crop definitions via UCropDataAsset — seed/harvest item tags, multi-stage growth durations, valid seasons, yield range, multi-harvest support
  • Multi-stage crop growth over in-game time, with lazy, event-driven updates (no per-tick polling)
  • Seasonal growth gating — crops pause growth when the current season isn’t in their ValidSeasons, and can be configured to die off-season
  • Soil moisture simulation — a pluggable strategy pattern (UFarmingSoilMoistureStrategy) with both a simple, marketplace-friendly strategy and a more advanced simulation strategy; tracks watering, daily decay (evaporation/drainage influenced by temperature, humidity, and soil type), drowning from overwatering, and insufficient-water detection
  • Crop disease — crops can become diseased (InfectCrop) and be cured (CureCrop), with dedicated events for both
  • Multiplayer replication — farming state is replicated, with OnRep_FarmingState() firing on clients and authority checks gating all mutating actions
  • Save/load persistence — SerializeState / DeserializeState on the component
  • Debug console commands — Farm.ForceGrow, Farm.ForceHarvest via UFarmingDebugCommands

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Architecture

  • UFarmingComponent — the main component; owns planting, growth, harvesting, and save state for one farm plot
  • UCropDataAsset — per-crop configuration: growth stages, seasons, yield, item tags
  • UFarmingSoilMoistureStrategy (abstract) — moisture calculation strategy, with SimpleSoilMoistureStrategy and AdvancedSoilMoistureStrategy implementations provided
  • UFarmingSubsystem — world-level subsystem
  • UFarmingSystemSettings — project settings
  • UFarmingDebugCommands — cheat-manager console commands for testing
  • AFarmPlotDemoActor — example farm plot actor

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Multiplayer

Server authoritative: planting, harvesting, and growth updates must occur on the server. FFarmingState is replicated, and clients react through OnRep_FarmingState() and broadcast events. Client-side prediction is intentionally not implemented — farming actions are slow-paced enough not to need it.

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Integration

UMFS has no hard dependency on any other plugin — each integration point is a BlueprintNativeEvent hook on UFarmingComponent that you override:
  • World time / season: OnGetWorldTime — supply the current day and ESeason; call UpdateGrowth on your day-change event
  • Inventory (UMI): OnConsumeSeedItem / OnAddHarvestedItems, using Item.Seed.<CropType> / Item.Food.<CropType> gameplay tags
  • Skills (UMSS): OnAwardFarmingXP — 5 XP for planting, 25 XP for harvesting by default
  • Interaction: built-in CanInteract / PerformInteraction / GetInteractionPrompt methods to wire into any interaction system
  • Weather: soil moisture strategies accept ECurrentWeatherType and temperature/humidity for decay and watering calculations