public float[,] GenerateMap(DiamondSquareGenerationData generationData, CancellationToken token)
{
if (generationData.PowerOfTwo > MaxPowerOfTwo)
{
throw new ArgumentException($"n should not be more then {MaxPowerOfTwo} or it can cause an overflow.");
}
if (generationData.PowerOfTwo < MinValueOfTwo)
{
throw new ArgumentException($"n should not be less then {MinValueOfTwo}.");
}
GenerateMapInternal(generationData, token);
return(m_Map);
}
private void GenerateMapInternal(DiamondSquareGenerationData generationData, CancellationToken token)
{
m_Random = new Random(generationData.Seed);
var size = (int)Math.Pow(2, generationData.PowerOfTwo) + 1;
m_Map = new float[size, size];
var startValue = RandRange(MinValue, MaxValue);
var maxIndex = size - 1;
m_Map[0, 0] = startValue;
m_Map[0, maxIndex] = startValue;
m_Map[maxIndex, 0] = startValue;
m_Map[maxIndex, maxIndex] = startValue;
for (var i = maxIndex; i > 1; i /= 2)
{
var noiseModifier = (MaxValue - MinValue) * generationData.Roughness * ((float)i / maxIndex);
for (var y = 0; y < maxIndex; y += i)
{
for (var x = 0; x < maxIndex; x += i)
{
DiamondStep(x, y, i, noiseModifier);
}
}
for (var y = 0; y < maxIndex; y += i)
{
for (var x = 0; x < maxIndex; x += i)
{
SquareStep(x, y, i, noiseModifier, maxIndex);
}
}
token.ThrowIfCancellationRequested();
}
}
