public static void childTracer(object data)
{
int offset = (int)data;
int nx = rc.getNumXPixels();
int ny = rc.getNumYPixels();
int ns = rc.getNumSamples();
int coreNum = offset + 1;
Console.WriteLine("starting thread " + coreNum + " of " + numThreads);
Vec3 col = new Vec3(0.0f, 0.0f, 0.0f);
for (int j = ny - 1; j >= 0; j--)
{
for (int i = offset; i < nx; i += numThreads)
{
for (int s = 0; s < ns; s++)
{
float u = (float)((float)i + (ConfigParams.aliasing_on ? Rng.f() : 0.0f)) / (float)nx;
float v = (float)((float)j + (ConfigParams.aliasing_on ? Rng.f() : 0.0f)) / (float)ny;
col = color(Camera.get_ray(u, v), 0);
rc.addR(i, j, col.r());
rc.addG(i, j, col.g());
rc.addB(i, j, col.b());
}
}
progressList[offset] += 1;
}
Interlocked.Increment(ref threadCounter); // signal this thread has finished
return;
} // end childTracer
public static void writeToPng(string fileName, RayCanvas rc)
{
// X := width :: col
// Y := height :: row
int width = rc.getNumXPixels();
int height = rc.getNumYPixels();
WriteableBitmap wbitmap = new WriteableBitmap(
width, height, 96, 96, PixelFormats.Bgra32, null);
byte[, ,] pixels = new byte[height, width, 4];
for (int col = 0; col < width; col++)
{
for (int row = 0; row < height; row++)
{
//for (int i = 0; i < 3; i++)
//{
pixels[row, col, 3] = 255; // alpha?
//}
int ir = (int)(256 * rc.getR(col, height - row - 1));
int ig = (int)(256 * rc.getG(col, height - row - 1));
int ib = (int)(256 * rc.getB(col, height - row - 1));
if (ir > 255)
{
ir = 255;
}
if (ig > 255)
{
ig = 255;
}
if (ib > 255)
{
ib = 255;
}
pixels[row, col, 0] = (byte)ib; // Blue first, PixelFormats.Bgra32
pixels[row, col, 1] = (byte)ig; // Green
pixels[row, col, 2] = (byte)ir; // Red last
}
}
// X := width :: col
// Y := height :: row
byte[] pixels1d = new byte[height * width * 4];
int index = 0;
for (int row = 0; row < height; row++)
{
for (int col = 0; col < width; col++)
{
for (int i = 0; i < 4; i++)
{
pixels1d[index++] = pixels[row, col, i];
}
}
}
Int32Rect rect = new Int32Rect(0, 0, width, height);
int stride = 4 * width;
wbitmap.WritePixels(rect, pixels1d, stride, 0);
string filePath = fileName;
var fileStream = new FileStream(filePath, FileMode.Create);
BitmapEncoder encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(wbitmap));
encoder.Save(fileStream);
fileStream.Close();
}