void GenerateHeightMap(DiamondSquare.CornerData corners, double range, double h, double amplify)
{
// +1 for diamond square
var heightMap = new ArrayGrid2D <double>(m_size.Width + 1, m_size.Height + 1);
double min, max;
DiamondSquare.Render(heightMap, corners, range, h, m_random, out min, out max);
Parallel.For(0, m_size.Height, y =>
{
double d = max - min;
for (int x = 0; x < m_size.Width; ++x)
{
var v = heightMap[x, y];
// normalize to 0.0 - 1.0
v = (v - min) / d;
// amplify
v = Math.Pow(v, amplify);
// adjust
v *= m_size.Depth / 2;
v += m_size.Depth / 2 - 1;
m_data.SetSurfaceLevel(x, y, MyMath.Round(v));
}
});
}
public static void Render(ArrayGrid2D <double> grid, CornerData corners, double range, double h, Random random,
out double min, out double max)
{
if (grid.Width != grid.Height)
{
throw new Exception();
}
var ctx = new Context()
{
Random = random,
Grid = grid,
Corners = corners,
Range = range,
H = h,
Min = Math.Min(Math.Min(Math.Min(corners.SW, corners.SE), corners.NE), corners.NW),
Max = Math.Max(Math.Max(Math.Max(corners.SW, corners.SE), corners.NE), corners.NW),
};
grid[0, 0] = corners.SW;
grid[grid.Width - 1, 0] = corners.SE;
grid[grid.Width - 1, grid.Height - 1] = corners.NE;
grid[0, grid.Height - 1] = corners.NW;
HeightMap(ctx);
min = ctx.Min;
max = ctx.Max;
}
public static void Render(ArrayGrid2D<double> grid, CornerData corners, double range, double h, int randomSeed,
out double min, out double max)
{
if (grid.Width != grid.Height)
throw new Exception();
var ctx = new Context()
{
Random = new Random(randomSeed),
Grid = grid,
Corners = corners,
Range = range,
H = h,
Min = Math.Min(Math.Min(Math.Min(corners.SW, corners.SE), corners.NE), corners.NW),
Max = Math.Max(Math.Max(Math.Max(corners.SW, corners.SE), corners.NE), corners.NW),
};
grid[0, 0] = corners.SW;
grid[grid.Width - 1, 0] = corners.SE;
grid[grid.Width - 1, grid.Height - 1] = corners.NE;
grid[0, grid.Height - 1] = corners.NW;
HeightMap(ctx);
min = ctx.Min;
max = ctx.Max;
}
public static void Clamp(ArrayGrid2D <double> grid, double average)
{
grid.ForEach(v =>
{
if (v < average)
{
double d = average - v;
v = average - Math.Pow(d, 1.0 / 20);
}
return(v);
});
}
public static void MinMax(ArrayGrid2D<double> grid, out double min, out double max)
{
max = Double.MinValue;
min = Double.MaxValue;
foreach (var v in grid)
{
if (v < min)
min = v;
if (v > max)
max = v;
}
}
public static void Clamp(ArrayGrid2D<double> grid, double average)
{
grid.ForEach(v =>
{
if (v < average)
{
double d = average - v;
v = average - Math.Pow(d, 1.0 / 20);
}
return v;
});
}
public static void Normalize(ArrayGrid2D <double> grid)
{
double min, max;
MinMax(grid, out min, out max);
double d = max - min;
grid.ForEach(v =>
{
v -= min;
v /= d;
return(v);
});
}
public static void Normalize(ArrayGrid2D<double> grid)
{
double min, max;
MinMax(grid, out min, out max);
double d = max - min;
grid.ForEach(v =>
{
v -= min;
v /= d;
return v;
});
}
public static void MinMax(ArrayGrid2D <double> grid, out double min, out double max)
{
max = Double.MinValue;
min = Double.MaxValue;
foreach (var v in grid)
{
if (v < min)
{
min = v;
}
if (v > max)
{
max = v;
}
}
}
void GenerateTerrain(DiamondSquare.CornerData corners, double range, double h, int seed, double amplify)
{
// +1 for diamond square
var doubleHeightMap = new ArrayGrid2D<double>(m_size.Width + 1, m_size.Height + 1);
double min, max;
DiamondSquare.Render(doubleHeightMap, corners, range, h, seed, out min, out max);
var heightMap = m_data.HeightMap;
Parallel.For(0, m_size.Height, y =>
{
double d = max - min;
for (int x = 0; x < m_size.Width; ++x)
{
var v = doubleHeightMap[x, y];
// normalize to 0.0 - 1.0
v = (v - min) / d;
// amplify
v = Math.Pow(v, amplify);
// adjust
v *= m_size.Depth / 2;
v += m_size.Depth / 2 - 1;
heightMap[y, x] = (byte)Math.Round(v);
}
});
}
void GenerateHeightMap(DiamondSquare.CornerData corners, double range, double h, double amplify)
{
// +1 for diamond square
var heightMap = new ArrayGrid2D<double>(m_size.Width + 1, m_size.Height + 1);
double min, max;
DiamondSquare.Render(heightMap, corners, range, h, m_random, out min, out max);
Parallel.For(0, m_size.Height, y =>
{
double d = max - min;
for (int x = 0; x < m_size.Width; ++x)
{
var v = heightMap[x, y];
// normalize to 0.0 - 1.0
v = (v - min) / d;
// amplify
v = Math.Pow(v, amplify);
// adjust
v *= m_size.Depth / 2;
v += m_size.Depth / 2 - 1;
m_data.SetSurfaceLevel(x, y, MyMath.Round(v));
}
});
}
