public string GetImageFileName(int width, int height, double dpiX, double dpiY, CancellationToken cancellationToken, string settingsSummary, string exportDirectory)
{
var sw = Stopwatch.StartNew();
OutputLogEveryXPixel = (width * height / 100);
if (AccelerationStructure)
{
_accelerationStructure = BVHNode.BuildTopDown(_spheres, _logger);
}
var bitmap = new BitmapImage(width, height, dpiX, dpiY);
var divideX = width / (float)2;
var alignX = 1 - divideX;
var divideY = height / (float)2;
var alignY = 1 - divideY;
int workDone = 0;
int totalWork = width * height;
if (Parallelize)
{
var options = new ParallelOptions()
{
CancellationToken = cancellationToken, MaxDegreeOfParallelism = Environment.ProcessorCount
};
Parallel.For(0, width, options, i =>
{
for (int j = 0; j < height; j++)
{
if (cancellationToken.IsCancellationRequested)
{
break;
}
if (AntiAliasing)
{
Vector3 result = Vector3.Zero;
for (int k = 0; k < AntiAliasingSampleSize; k++)
{
var dx = (float)_random.NextGaussian(0d, 0.5d);
var dy = (float)_random.NextGaussian(0d, 0.5d);
var x = (i + alignX + dx) / divideX;
var y = ((height - j) + alignY + dy) / divideY;
var rgb = GetColor(x, y);
result += rgb;
}
var avg_rgb = result * (1f / AntiAliasingSampleSize);
var c = Conversions.FromRGB(avg_rgb, GammaCorrect);
bitmap.Set(i, j, c);
}
else
{
var x = (i + alignX) / divideX;
var y = ((height - j) + alignY) / divideY;
var rgb = GetColor(x, y);
var c = Conversions.FromRGB(rgb, GammaCorrect);
bitmap.Set(i, j, c);
}
var value = Interlocked.Increment(ref workDone);
if (value % OutputLogEveryXPixel == 0)
{
var progress = (float)value / totalWork;
WriteOutput($"{(progress * 100):F3}% progress. Running {sw.Elapsed}. Remaining {TimeSpan.FromMilliseconds(sw.Elapsed.TotalMilliseconds / progress * (1f - progress))}.");
}
}
});
}
else
{
for (int i = 0; i < width; i++)
{
if (cancellationToken.IsCancellationRequested)
{
break;
}
for (int j = 0; j < height; j++)
{
if (cancellationToken.IsCancellationRequested)
{
break;
}
if (AntiAliasing)
{
Vector3 result = Vector3.Zero;
for (int k = 0; k < AntiAliasingSampleSize; k++)
{
var x = (i + alignX + (float)_random.NextGaussian(0d, 0.5d)) / divideX;
var y = ((height - j) + alignY + (float)_random.NextGaussian(0d, 0.5d)) / divideY;
var rgb = GetColor(x, y);
result += rgb;
}
var avg_rgb = result * (1f / AntiAliasingSampleSize);
var c = Conversions.FromRGB(avg_rgb, GammaCorrect);
bitmap.Set(i, j, c);
}
else
{
// Question: Why is it mirrored?
var x = (i + alignX) / divideX;
var y = ((height - j) + alignY) / divideY;
var rgb = GetColor(x, y);
var c = Conversions.FromRGB(rgb, GammaCorrect);
bitmap.Set(i, j, c);
}
++workDone;
if (workDone % OutputLogEveryXPixel == 0)
{
var progress = (float)workDone / totalWork;
WriteOutput($"{(progress * 100):F3}% progress. Running {sw.Elapsed}. Remaining {TimeSpan.FromMilliseconds(sw.Elapsed.TotalMilliseconds / progress * (1f - progress))}.");
}
}
}
}
if (cancellationToken.IsCancellationRequested)
{
WriteOutput("Operation canceled by user.");
return(null);
}
var imageSource = bitmap.GetImageSource();
sw.Stop();
return(SaveImage(imageSource, sw.Elapsed, settingsSummary, exportDirectory));
}
