/// <summary>
/// The universe rendered to an image.
/// </summary>
public void Visualize(WriteableBitmap bitmap)
{
int width = _universe.Width;
int height = _universe.Height;
// I am usually against unsafe code, but this seems to be the
// only way in XAML to render bit-by-bit and get any degree of
// speed. If anyone knows a better way (that is still reasonably fast),
// let me know. --JHeaton.
bitmap.Lock();
unsafe
{
for (int row = 0; row < height; row++)
{
for (int col = 0; col < width; col++)
{
double dr = (_universe.Get(row, col).Data[0] + 1.0) / 2.0;
double dg = (_universe.Get(row, col).Data[1] + 1.0) / 2.0;
double db = (_universe.Get(row, col).Data[2] + 1.0) / 2.0;
// Compute the pixel's color.
int colorData = ((byte)(dr * 255.0)) << 16; // R
colorData |= ((byte)(dg * 255.0)) << 8; // G
colorData |= ((byte)(db * 255.0)) << 0; // B
for (int y = 0; y < _zoom; y++)
{
for (int x = 0; x < _zoom; x++)
{
// Get a pointer to the back buffer.
var pBackBuffer = (int)bitmap.BackBuffer;
// Find the address of the pixel to draw.
pBackBuffer += (row * _zoom + y)
* bitmap.BackBufferStride
+ (col * _zoom + x) * 4;
// Assign the color data to the pixel.
*((int *)pBackBuffer) = colorData;
}
}
}
}
}
// Specify the area of the bitmap that changed.
bitmap.AddDirtyRect(new Int32Rect(0, 0, width * _zoom, height * _zoom));
bitmap.Unlock();
}
/// <summary>
/// Copy another universe into this one.
/// </summary>
/// <param name="source">The source universe.</param>
public void Copy(UniverseHolder source)
{
for (int row = 0; row < Height; row++)
{
for (int col = 0; col < Width; col++)
{
for (int i = 0; i < _cellSize; i++)
{
_data[row][col].Data[i] = source.Get(row, col).Data[i];
}
}
}
}
/// <summary>
/// Compare this universe to another and return the difference. A value of zero indicates an identical universe.
/// The lower the value, the more similar.
/// </summary>
/// <param name="otherUniverse">The other universe.</param>
/// <returns>The difference between the universes.</returns>
public double Compare(UniverseHolder otherUniverse)
{
int result = 0;
int total = 0;
for (int row = 0; row < otherUniverse.Height; row++)
{
for (int col = 0; col < otherUniverse.Width; col++)
{
int d1 = Math.Abs((int)(255 * Get(row, col).Avg));
int d2 = Math.Abs((int)(255 * otherUniverse.Get(row, col).Avg));
if (Math.Abs(d1 - d2) > 10)
{
result++;
}
total++;
}
}
return(result / (double)total);
}
/// <summary>
/// Copy another universe into this one.
/// </summary>
/// <param name="source">The source universe.</param>
public void Copy(UniverseHolder source)
{
for (int row = 0; row < Height; row++)
{
for (int col = 0; col < Width; col++)
{
for (int i = 0; i < _cellSize; i++)
{
_data[row][col].Data[i] = source.Get(row, col).Data[i];
}
}
}
}
/// <summary>
/// Compare this universe to another and return the difference. A value of zero indicates an identical universe.
/// The lower the value, the more similar.
/// </summary>
/// <param name="otherUniverse">The other universe.</param>
/// <returns>The difference between the universes.</returns>
public double Compare(UniverseHolder otherUniverse)
{
int result = 0;
int total = 0;
for (int row = 0; row < otherUniverse.Height; row++)
{
for (int col = 0; col < otherUniverse.Width; col++)
{
int d1 = Math.Abs((int) (255*Get(row, col).Avg));
int d2 = Math.Abs((int) (255*otherUniverse.Get(row, col).Avg));
if (Math.Abs(d1 - d2) > 10)
{
result++;
}
total++;
}
}
return result/(double) total;
}