public int Step(
TectonicParameters parameters
)
{
// Determine whether this hex should be sunk
bool sink = Random.value < parameters.SinkProbability;
int result = parameters.LandBudget;
// For each region . . .
for (int i = 0; i < _regions.Count; i++)
{
MapRegionRect region = _regions[i];
// Get a chunk size to use within the bounds of the region based
// of the minimum and maximum chunk sizes.
int regionDensity = Random.Range(
parameters.RegionDensityMin,
parameters.RegionDensityMax + 1
);
// If hex is to be sunk, sink hex and decrement decrement
// land budget if sinking results in a hex below water
// level.
if (sink)
{
result = SinkTerrain(
result,
regionDensity,
region,
parameters.HighRiseProbability,
parameters.ElevationMin,
parameters.WaterLevelGlobal,
parameters.JitterProbability,
parameters.HexSize
);
}
// Else, raise hex and increment land budget if raising
// results in a hex above the water level.
else
{
result = RaiseTerrain(
result,
regionDensity,
region,
parameters.HighRiseProbability,
parameters.ElevationMax,
parameters.WaterLevelGlobal,
parameters.JitterProbability,
parameters.HexSize
);
if (result == 0)
{
return(result);
}
}
}
return(result);
}
/// <summary>
/// Generate a HexMap using the standard RootGen algorithm.
/// </summary>
/// <param name="config">
/// The configuration data for the map to be generated.
/// </param>
/// <returns>
///A randomly generated HexMap object.
/// </returns>
public HexMap GenerateMap(
RootGenConfig config,
bool editMode = true
)
{
string diagnostics = "Generate Map Performance Diagnostics\n\n";
HexMap result = HexMap.CreateHexMapGameObject();
int seed;
if (config.useFixedSeed)
{
seed = config.seed;
}
else
{
config.seed = Random.Range(0, int.MaxValue);
config.seed ^= (int)System.DateTime.Now.Ticks;
config.seed ^= (int)Time.time;
config.seed &= int.MaxValue;
seed = config.seed;
}
// Snapshot the initial random state before consuming the random
// sequence.
Random.State snapshot = RandomState.Snapshot(seed);
result.Initialize(
new Rect(0, 0, config.width, config.height),
seed,
config.hexSize,
config.wrapping,
editMode
);
foreach (Hex hex in result.Hexes)
{
hex.WaterLevel = config.waterLevel;
}
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
HexMapTectonics hexMapTectonics = new HexMapTectonics(
result,
config.regionBorder,
config.mapBorderX,
config.mapBorderZ,
config.numRegions
);
int landBudget = Mathf.RoundToInt(
result.SizeSquared *
config.landPercentage *
0.01f
);
TectonicParameters tectonicParameters =
new TectonicParameters(
config.hexSize,
config.highRiseProbability,
config.jitterProbability,
config.sinkProbability,
config.elevationMax,
config.elevationMin,
config.waterLevel,
landBudget,
config.maximumRegionDensity,
config.minimumRegionDensity
);
string logString = "Tectonic Statistics\n";
for (int i = 0; i < MAX_TECTONIC_STEPS; i++)
{
tectonicParameters.LandBudget = hexMapTectonics.Step(
tectonicParameters
);
//result.Draw(config.hexSize);
logString +=
"Step " + i + ", Land Hexes: " +
result.LandHexes.Count + " / Land Budget: " +
tectonicParameters.LandBudget + " Total: " +
(result.LandHexes.Count + tectonicParameters.LandBudget) + "\n";
if (tectonicParameters.LandBudget == 0)
{
break;
}
}
RootLog.Log(logString, Severity.Information, "Diagnostics");
// If land budget is greater than 0, all land hexes specified to
// be allocated were not allocated successfully. Log a warning,
// decrement the remaining land budget from the result, and return
// the result as the number of land hexes allocated.
if (tectonicParameters.LandBudget > 0)
{
RootLog.Log(
"Failed to use up " + tectonicParameters.LandBudget + " land budget.",
Severity.Warning,
"MapGenerator"
);
}
stopwatch.Stop();
diagnostics += "Generate Tectonics: " + stopwatch.Elapsed + "\n";
stopwatch.Start();
HexMapErosion erosion = new HexMapErosion(result);
int erodibleHexes = erosion.ErodibleHexes.Count;
// Calculate the target number of uneroded hexes.
int targetUnerodedHexes =
(int)(
erodibleHexes *
(100 - config.erosionPercentage) *
0.01f
);
while (erosion.ErodibleHexes.Count > targetUnerodedHexes)
{
erosion.Step(
config.hexSize
);
}
stopwatch.Stop();
diagnostics += "Generate Erosion: " + stopwatch.Elapsed + "\n";
stopwatch.Start();
HexMapClimate hexMapClimate = new HexMapClimate(
result,
config.startingMoisture
);
ClimateParameters climateParameters = new ClimateParameters(
config.hemisphere,
config.windDirection,
config.evaporationFactor,
config.highTemperature,
config.lowTemperature,
config.precipitationFactor,
config.runoffFactor,
config.seepageFactor,
config.temperatureJitter,
config.windStrength,
config.hexSize,
config.elevationMax,
config.waterLevel
);
for (int i = 0; i < config.initialClimateSteps; i++)
{
hexMapClimate.Step(climateParameters);
}
List <ClimateData> climates = hexMapClimate.List;
stopwatch.Stop();
diagnostics += "Generate Climate: " + stopwatch.Elapsed + "\n";
stopwatch.Start();
HexMapRivers hexMapRivers = new HexMapRivers(
result,
climates,
config.waterLevel,
config.elevationMax
);
for (int i = 0; i < config.numInitialRivers; i++)
{
hexMapRivers.StartRiver();
}
for (int i = 0; i < config.numInitialRiverSteps; i++)
{
hexMapRivers.Step(
config.waterLevel,
config.elevationMax,
config.extraLakeProbability,
config.hexSize,
climates
);
}
result.RiverDigraph = hexMapRivers.RiverDigraph;
stopwatch.Stop();
diagnostics += "Generate Rivers: " + stopwatch.Elapsed + "\n";
stopwatch.Start();
hexMapClimate.RefreshTerrainTypes(
climateParameters,
result.RiverDigraph
);
stopwatch.Stop();
diagnostics += "Assign Terrain Types: " + stopwatch.Elapsed + "\n";
RootLog.Log(
diagnostics,
Severity.Information,
"Diagonstics"
);
// Restore the snapshot of the random state taken before consuming
// the random sequence.
Random.state = snapshot;
return(result);
}