동적 환경 변화와 시뮬레이션

UCLASS()
class APlant : public AActor
{
      UPROPERTY(EditAnywhere, BlueprintReadWrite)
      float GrowthStage = 0.0f; // 0.0 to 1.0
 
      UFUNCTION(BlueprintCallable)
      void UpdateGrowth(float DeltaTime, float SunlightIntensity, float WaterLevel);
};

Function UpdateGrowth:
- Increase GrowthStage based on Sunlight and Water
- Lerp between growth meshes/materials
- Update plant size and appearance

Function ApplyWither:
- Decrease GrowthStage when water/sunlight is insufficient
- Blend to withered texture/material
- Shrink plant size

Material:
- Use World Position Offset for waves
- Implement UV panning for flow

Function UpdateWaterSurface:
- Adjust wave height based on wind intensity
- Modify water color based on weather (e.g., darker for storms)
- Add foam/splash particles in stormy conditions

Function ApplySnowCover:
- Ray cast downwards from sky
- Apply snow material layer to hit surfaces
- Gradually increase snow depth over time

Function MeltSnow:
- Decrease snow depth based on temperature
- Blend between snow and original material

Landscape Material:
- Create layers for different weather conditions
- Use vertex painting for blending

Function UpdateTerrainTexture:
- Adjust blend weights based on current weather
- Gradually blend between dry/wet/snowy textures

void SimulateErosion(TArray<float>& HeightMap, float RainIntensity, float Time)
{
      // 비의 강도와 시간에 따라 높이맵 수정
      // 경사도 계산 및 물 흐름 시뮬레이션
}

Function ApplyWeathering:
- Modify terrain normal maps for worn look
- Add debris/rock fall particles in steep areas

Animal AI Behavior Tree:
- Seek water/food sources
- Avoid predators
- Migrate based on season/weather

Function SpawnVegetation:
- Check terrain conditions (slope, altitude, moisture)
- Spawn appropriate plant types
- Manage plant lifecycle (growth, reproduction, death)

void ApplyWindForce(UPrimitiveComponent* Component, FVector WindDirection, float WindSpeed)
{
      float WindForce = CalculateWindForce(Component, WindSpeed);
      Component->AddForce(WindDirection * WindForce);
}

Function WetSurface:
- Ray cast from above to detect exposed surfaces
- Apply wet material layer or adjust existing material parameters
- Gradually increase wetness over time

void UpdateEnvironment(const TArray<FVector2D>& ActiveCells)
{
      // 플레이어 주변 셀만 상세 시뮬레이션
      for (const auto& Cell : ActiveCells)
      {
         SimulateDetailedEnvironment(Cell);
      }
}