TerrainErosion.h

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#pragma once
 
#include "common/Result.h"
 
namespace eve::procgen {
class Heightmap;
struct TerrainWaterSettings;
 
struct TerrainSedimentSettings {
    float effect = -1, depositRate = 0.00004F;
    float bankDeposit = 1, bedDeposit = 5;
};
 
struct TerrainLegacyHydraulicSettings {
    int   iterations = 1;
    int   rainFrequency = 1;
    float sedimentDissolveRate = 0.1F;
};
 
[[nodiscard]] EVENGINE_API_DOMAINS Result<int> applyTerrainLegacyHydraulic(
    Heightmap& heights, Heightmap& sediment, const Heightmap& hardness, const Heightmap& rain,
    const TerrainLegacyHydraulicSettings& settings);
 
struct TerrainLegacyDistributedErosionSettings {
    float minimumThreshold = 0;
    float maximumThreshold = 1;
    int   iterations = 1;
};
 
[[nodiscard]] EVENGINE_API_DOMAINS Result<int> applyTerrainLegacyDistributedErosion(
    Heightmap& heights, const TerrainLegacyDistributedErosionSettings& settings);
 
struct TerrainLegacySteepestErosionSettings {
    int   iterations = 1;
    float talusMinimum = 0;
    float talusMaximum = 1;
};
 
[[nodiscard]] EVENGINE_API_DOMAINS Result<int> applyTerrainLegacySteepestErosion(
    Heightmap& heights, const Heightmap& hardness, const TerrainLegacySteepestErosionSettings& settings);
 
[[nodiscard]] EVENGINE_API_DOMAINS Result<int> applyTerrainSediment(Heightmap& heights, Heightmap& sediment,
                                                                    const Heightmap&               velocityX,
                                                                    const Heightmap&               velocityZ,
                                                                    const TerrainWaterSettings&    water,
                                                                    const TerrainSedimentSettings& settings);
 
struct TerrainThermalSettings {
    float spacingX = 1, spacingZ = 1, heightScale = 1;
    float reposeSlope = 11.430052F, dt = 0.00025F;
    int   iterations = 3;
};
 
[[nodiscard]] EVENGINE_API_DOMAINS Result<int> applyTerrainThermal(Heightmap& heights, Heightmap& sediment,
                                                                   const TerrainThermalSettings& settings);
}  // namespace eve::procgen