double GetCoastalModifier(DoubleVector3 location, int level, double scale, double continentalHeight)
{
var continentalHeightPercentage = DoubleMathHelper.Lerp(0, 1, continentalHeight / scale / 2);
var coastalDamping1 = MathHelper.Clamp((float)continentalHeightPercentage * 200, 0, 1);
var coastalDamping2 = NoiseFilter.Hermite(DoubleMathHelper.Clamp(continentalHeightPercentage * 2000, 0, 1));
var coastalModifier = coastalDamping1 * coastalDamping2;
return(coastalModifier);
}
double GetRegionalModifier(DoubleVector3 location)
{
var lowFrequencyRegionalModifier = _regionalGenerator1.GetSpectralNoise(location, 21, 4, 2.0, 0.5);
lowFrequencyRegionalModifier += 1;
var mediumFrequencyRegionalModifier = _regionalGenerator2.GetSpectralNoise(location, 30, 4, 2.0, 0.5);
mediumFrequencyRegionalModifier += 1;
var regionalModifier = DoubleMathHelper.Clamp(lowFrequencyRegionalModifier * mediumFrequencyRegionalModifier, 0, 2);
return(regionalModifier);
}
public double GetHeight(DoubleVector3 location, int level, double scale)
{
var heightVariance1 = _varianceGenerator1.GetNoise(location, 5, 4, 2.0, 0.5);
heightVariance1 = (heightVariance1 + 1);
var heightVariance2 = _varianceGenerator2.GetNoise(location, 15, 4, 3.0, 0.5);
heightVariance2 = (heightVariance2 + 1);
var heightVariance = DoubleMathHelper.Clamp(heightVariance1 * heightVariance2, 0, 2);
_sampleCount++;
if (_sampleCount % 1000 == 0)
{
Debug.WriteLine(heightVariance);
}
var height = heightVariance * scale;
return(height);
}
double AccumulateNoise(DoubleVector3 location, int numberOfOctaves, double lacunarity, double gain)
{
double weight = 1;
double noise = 0;
double amplitude = 1;
for (int x = 0; x < numberOfOctaves; x++)
{
double signal = _noiseGenerator.GetNoise(location);
signal = 1 - Math.Abs(signal);
signal *= signal * weight;
weight = signal / gain;
weight = DoubleMathHelper.Clamp(weight, 0, 1);
noise += (signal * amplitude);
location *= lacunarity;
amplitude *= gain;
}
return((noise * 1.25) - 1.0);;
}
public void Update()
{
// TODO: need to disable changed events while doing this
StatisticsList.Clear();
StatisticsList.Add("Frame rate: " + _statistics.FrameRate);
StatisticsList.Add("Number of quad nodes: " + _statistics.NumberOfQuadNodes);
StatisticsList.Add("Number of quad nodes per level: " + GetQuadNodesPerLevel());
StatisticsList.Add("Highest level: " + GetHighestQuadNodeLevel());
StatisticsList.Add("Number of quad meshes rendered per frame: " + _statistics.PreviousNumberOfQuadMeshesRendered);
StatisticsList.Add("Number of quad node splits scheduled per interval: " + _statistics.NumberOfSplitsScheduledPerInterval);
StatisticsList.Add("Number of quad node splits canceled per interval: " + _statistics.NumberOfSplitsCanceledPerInterval);
StatisticsList.Add("Number of pending quad node splits: " + _statistics.NumberOfPendingSplits);
StatisticsList.Add("Number of pending quad node merges: " + _statistics.NumberOfPendingMerges);
StatisticsList.Add("Camera altitude: " + _statistics.CameraAltitude.ToString("F0") + " m (" + DoubleMathHelper.MetersToFeet(_statistics.CameraAltitude).ToString("F0") + " ft) ASL");
ResetPerIntervalStatistics();
}
