public override void WriteToBitmap(Canvas canvas)
{
PrepareWriteBitmap(canvas);
/* int[,] array1 = new int[a_bmp.Width,a_bmp.Height];
int[,] array2 = new int[a_bmp.Width,a_bmp.Height];
int[,] arrayTmp;
for(int x=0; x<a_bmp.Width; x++)
{
for(int y=0; y<a_bmp.Height; y++)
array2[x,y] = (int)(255*(0.5*GetRandomValue(x, y)+0.5));
}
int m_nNumIterations = 1;
for (int i=0; i<m_nNumIterations; i++)
{
for(int x=1; x<a_bmp.Width-1; x++)
{
for(int y=1; y<a_bmp.Height-1; y++)
{
array1[x,y] =
((array2[x-1, y-1]+array2[x+1, y-1]+
array2[x-1, y+1]+array2[x+1, y+1]+
array2[x-1, y] +array2[x+1, y]+
array2[x, y-1] +array2[x, y+1]+
array2[x, y]) / 9)+1;
}
arrayTmp = (int[,])array2.Clone();
array2 = (int[,])array1.Clone();
array1 = (int[,])arrayTmp.Clone();
}
}
for(int x=0; x<a_bmp.Width; x++)
{
for(int y=0; y<a_bmp.Height; y++)
a_bmp.SetPixel(x,y, Color.FromArgb(array2[x,y],0,0));
}
return;
*/
for (int x = canvas.Width - 1; x >= 0; x--)
{
for (int y = canvas.Height - 1; y >= 0; y--)
{
float xValue = (x - canvas.Width / 2) / (float)canvas.Width;
float yValue = (y - canvas.Height / 2) / (float)canvas.Height;
double distValue = Math.Sqrt(xValue * xValue + yValue * yValue);
double d = distValue + m_fTurbulence * GetNoiseValue(x, y, m_nOctaves);
float total = (float)Math.Sin(2 * m_fNumCircles * d * 3.14159);
total = total*0.5f + 0.5f;
int fin = (int)(total*255);
Color clr = (Color)m_aColorTable[fin];
canvas.SetPixel(x, y, clr);
}
}
}
public override void WriteToBitmap(Canvas canvas)
{
Random rnd = new Random();
this.PrepareWriteBitmap(canvas);
int[,] array1 = new int[canvas.Width, canvas.Height];
int[,] array2 = new int[canvas.Width, canvas.Height];
for (int x = 0; x < canvas.Width; x++)
{
for (int y = 0; y < canvas.Height; y++)
{
array1[x,y] = rnd.Next(255);
}
}
double m_dRate = 0.1;
for (int nStep = 0; nStep < 50; nStep++)
{
//' Run the cellular automata step:
for (int x = 0; x < canvas.Width; x++)
{
for (int y = 0; y < canvas.Height; y++)
{
double dTot = 0;
for(int iX=-1; iX<=1; iX++)
{
int i = x + iX;
int j = 0;
if (i < 0) i = canvas.Width - 1;
else if (i >= canvas.Width) i = 0;
for(int iY=0; iY<=1; iY++)
{
j = y + iY;
if (j < 0) j = canvas.Height - 1;
else if (j >= canvas.Height) j = 0;
dTot+= array1[i,j];
}
dTot/= 9;
dTot+= m_dRate;
dTot = dTot - (int)dTot;
array2[i, j] = (int)(dTot * 255.0);
}
}
}
int[,] arrayTmp;
arrayTmp = array2;
array2= array1;
array1 = arrayTmp;
}
for (int x = canvas.Width - 1; x >= 0; x--)
{
for (int y = canvas.Height - 1; y >= 0; y--)
{
Color clr = (Color)m_aColorTable[array2[x,y]];
canvas.SetPixel(x, y, clr);
}
}
}
public static Canvas Convolve(Canvas canvas, float[,] kernel)
{
//Bitmap bmp = ((Canvas)canvas).ToBitmap();
Canvas canvasDst = canvas.CreateSimilar();
//Bitmap bmpDst = new Bitmap(canvas.Width, canvas.Height, bmp.PixelFormat);
//Canvas canvasDst = Canvas.Create(bmpDst);
canvasDst.Locked = true;
canvas.Locked = true;
EPoint pntKernelSize = new EPoint(kernel.GetLength(0), kernel.GetLength(1));
int nBpp = canvas.BitsPerPixel / 8;
//TODO: what to do with palettes in D3D..?
//if (nBpp == 1)
// bmpDst.Palette = bmp.Palette;
EPoint canvasSize = new EPoint(canvas.Width, canvas.Height);
float[] vals = new float[nBpp];
for (int y = pntKernelSize.Y / 2; y < canvasSize.Y - pntKernelSize.Y / 2; y++)
{
for (int x = pntKernelSize.X / 2; x < canvasSize.X - pntKernelSize.X / 2; x++)
{
for (int channel = 0; channel < nBpp; channel++)
vals[channel] = 0;
for (int yKernel = 0; yKernel < pntKernelSize.Y; yKernel++)
{
for (int xKernel = 0; xKernel < pntKernelSize.X; xKernel++)
{
int clr = canvas.GetPixelInt(
x + xKernel - pntKernelSize.X / 2,
y + yKernel - pntKernelSize.Y / 2);
for (int channel = 0; channel < nBpp; channel++)
{
vals[channel] += kernel[xKernel, yKernel] * (float)(clr & 0xff);
clr >>= 8;
}
}
}
if (nBpp == 1)
canvasDst.SetPixelInt(x, y, vals[0] > 255 ? 255 : (int)vals[0]);
else if (nBpp == 3)
canvasDst.SetPixel(x, y, Color.FromArgb(
vals[2] > 255 ? 255 : (int)vals[2],
vals[1] > 255 ? 255 : (int)vals[1],
vals[0] > 255 ? 255 : (int)vals[0]));
}
}
canvas.Locked = false;
canvasDst.Locked = false;
return canvasDst;
}
public override void WriteToBitmap(Canvas canvas)
{
this.PrepareWriteBitmap(canvas);
Random rnd = new Random();
double dMasterWL = 0.001/m_fFreq;
double dXWLFact = rnd.NextDouble()*2+2;
double dXYWLFact = rnd.NextDouble()*2+2;
double dYWLFact = rnd.NextDouble()*2+2;
double[] aOffsetsPerOctave = new double[3*m_nOctaves];
for (int nOctave = 0; nOctave < m_nOctaves; nOctave++)
{
for (int i = 0; i < 3; i++)
aOffsetsPerOctave[nOctave*3+i] = rnd.NextDouble()*3.1;
}
double dMax = -1000;
double dMin = 1000;
double[,] array = new double[canvas.Width, canvas.Height];
for (int x = 0; x < canvas.Width; x++)
{
for (int y = 0; y < canvas.Height; y++)
{
double dAmplitude = 1.0;
double dTotal = 0;
for (int nOctave = 1; nOctave <= m_nOctaves; nOctave++)
{
double z1 = Math.Sin(dXWLFact*x*nOctave*dMasterWL +aOffsetsPerOctave[(nOctave-1)*3+0]);
double z2 = Math.Sin((dXYWLFact*x*nOctave+y*nOctave)*dMasterWL +aOffsetsPerOctave[(nOctave-1)*3+1]);
double z3 = Math.Sin(dYWLFact*y*nOctave*dMasterWL+aOffsetsPerOctave[(nOctave-1)*3+2]);
dTotal+=dAmplitude*Math.Abs(z1+z2+z3);
dAmplitude*=m_fDecay;
}
array[x,y] = dTotal;
dMax = Math.Max(dMax, dTotal);
dMin = Math.Min(dMin, dTotal);
}
}
for (int x = canvas.Width - 1; x >= 0; x--)
{
for (int y = canvas.Height - 1; y >= 0; y--)
{
Color clr = (Color)m_aColorTable[(int)((array[x,y]-dMin)/(dMax+dMin)*255)];
canvas.SetPixel(x, y, clr);
}
}
}
public override void WriteToBitmap(Canvas canvas)
{
this.PrepareWriteBitmap(canvas);
for (int x = canvas.Width - 1; x >= 0; x--)
{
for (int y = canvas.Height - 1; y >= 0; y--)
{
float xyValue = 1f*(float)x * m_pntPeriods.X / m_nNoiseWidth + (float)y * m_pntPeriods.Y / m_nNoiseHeight;
//xyValue += (float)x * xPeriod / a_bmp.Width + (float)y * yPeriod / a_bmp.Height;
xyValue += m_fTurbulence*GetNoiseValue(x, y, m_nOctaves);
float total = (float)(Math.Sin(xyValue * 3.14159)); //Math.Abs
total = total*0.5f + 0.5f;
int fin = (int)(total*255);
Color clr = (Color)m_aColorTable[fin];
canvas.SetPixel(x, y, clr);
}
}
}
protected void PrepareWriteBitmap(Canvas canvas)
{
m_fScaleX = (float)m_nNoiseWidth / canvas.Width;
m_fScaleY = (float)m_nNoiseHeight / canvas.Height;
}
public virtual void WriteToBitmap(Canvas canvas)
{
this.PrepareWriteBitmap(canvas);
for (int x = canvas.Width - 1; x >= 0; x--)
{
for (int y = canvas.Height - 1; y >= 0; y--)
{
float total = GetNoiseValue((x+m_pntOffset.X)*m_fFreq, (y+m_pntOffset.Y)*m_fFreq, m_nOctaves);
total = total*0.5f + 0.5f;
int fin = (int)(total*255);
Color clr = (Color)m_aColorTable[fin];
canvas.SetPixel(x, y, clr);
}
}
}
