/// <summary>
/// Initializes the noise table
/// </summary>
/// <param name="_TableSize"></param>
/// <param name="_GradientSeed"></param>
/// <param name="_PermutationSeed"></param>
public void Init(int _TableSize, int _GradientSeed, int _PermutationSeed)
{
m_NoiseSize = (uint)_TableSize;
Random GradientRNG = new Random(_GradientSeed);
Random PermutationRNG = new Random(_PermutationSeed);
// Build the noise & permutation tables
m_NoiseTable = new WMath.Vector4D[2 * m_NoiseSize];
m_PermutationTable = new uint[2 * m_NoiseSize];
for (uint SlotIndex = 0; SlotIndex < m_NoiseSize; SlotIndex++)
{
m_NoiseTable[SlotIndex] = m_NoiseTable[m_NoiseSize + SlotIndex] = new WMath.Vector4D(2.0f * (float)GradientRNG.NextDouble() - 1.0f,
2.0f * (float)GradientRNG.NextDouble() - 1.0f,
2.0f * (float)GradientRNG.NextDouble() - 1.0f,
2.0f * (float)GradientRNG.NextDouble() - 1.0f);
m_PermutationTable[SlotIndex] = SlotIndex;
}
// Mix the permutation table by exchanging indices at random
for (uint SlotIndex = 0; SlotIndex < m_NoiseSize; SlotIndex++)
{
uint RandomIndex = (uint)PermutationRNG.Next((int)m_NoiseSize);
uint Temp = m_PermutationTable[RandomIndex];
m_PermutationTable[RandomIndex] = m_PermutationTable[SlotIndex];
m_PermutationTable[SlotIndex] = Temp;
}
// Finalize the permutation table by doubling its size
for (uint SlotIndex = 0; SlotIndex < m_NoiseSize; SlotIndex++)
{
m_PermutationTable[m_NoiseSize + SlotIndex] = m_PermutationTable[SlotIndex];
}
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
e.Graphics.FillRectangle(Brushes.Black, 0, 0, Width, Height);
if (m_SourceImage != null)
{
e.Graphics.DrawImage(m_SourceImage, ImageClientRectangle, new RectangleF(0, 0, m_SourceImage.Width, m_SourceImage.Height), GraphicsUnit.Pixel);
}
// Show custom swatches' location
RectangleF R = ImageClientRectangle;
for (int SwatchIndex = 0; SwatchIndex < m_CustomSwatches.Length; SwatchIndex++)
{
if (m_CustomSwatches[SwatchIndex] != null)
{
WMath.Vector4D Location = m_CustomSwatches[SwatchIndex];
PointF TopLeft = new PointF(R.Left + Location.x * R.Width, R.Top + Location.y * R.Height);
PointF BottomRight = new PointF(R.Left + Location.z * R.Width, R.Top + Location.w * R.Height);
e.Graphics.DrawRectangle(Pens.Red, TopLeft.X, TopLeft.Y, 1 + BottomRight.X - TopLeft.X, 1 + BottomRight.Y - TopLeft.Y);
e.Graphics.DrawString(SwatchIndex.ToString(), Font, Brushes.Red, 0.5f * (TopLeft.X + BottomRight.X - Font.Height), 0.5f * (TopLeft.Y + BottomRight.Y - Font.Height));
}
}
}
protected float Dot(WMath.Vector4D _Op0, float _Op1x, float _Op1y, float _Op1z, float _Op1w)
{
return(_Op0.x * _Op1x + _Op0.y * _Op1y + _Op0.z * _Op1z + _Op0.w * _Op1w);
}
