public Server(int port, Scene sc)
{
this.port = port;
finalBuffer = new PixelBuffer(sc.ImageWidth, sc.ImageHeight);
work = new List<Work>();
scene = sc;
var workNumX = 10;
var workNumY = 10;
var workWidth = sc.ImageWidth / workNumX;
var workHeight = sc.ImageHeight / workNumY;
for (var yi = 0; yi < workNumY; yi++) {
for (var xi = 0; xi < workNumX; xi++) {
var x = xi * workWidth;
var y = yi * workHeight;
work.Add (new Work() {
Id = work.Count,
Finished = false,
Scene = scene,
Width = workWidth,
Height = workHeight,
X = x,
Y = y,
});
}
}
}
public static PixelBuffer OpenBinary(Stream s)
{
using (var w = new BinaryReader (s)) {
var width = w.ReadInt32 ();
var height = w.ReadInt32 ();
var pb = new PixelBuffer (width, height);
for (var i = 0; i < width*height; i++) {
pb.Buffer [i].X = w.ReadDouble ();
pb.Buffer [i].Y = w.ReadDouble ();
pb.Buffer [i].Z = w.ReadDouble ();
}
return pb;
}
}
public void Execute(Random rand, PixelBuffer pb)
{
var w = Scene.ImageWidth;
var h = Scene.ImageHeight;
var samps = Scene.SamplesPerPixel;
var cam = Scene.Camera;
var cx = new Vec(w * 0.5135 / h);
var cy = cx.Cross(cam.Direction).Norm * 0.5135;
for (var py = 0; py < Height; py++)
{
for (var px = 0; px < Width; px++)
{
var x = X + px;
var y = Y + py;
var c = new Vec();
for (var sy = 0; sy < 2; sy++)
{
for (var sx = 0; sx < 2; sx++)
{
var r = new Vec();
for (var s = 0; s < samps; s++)
{
Prec r1 = 2 * rand.NextDouble(), dx = r1 < 1 ? Math.Sqrt(r1) - 1 : 1 - Math.Sqrt(2 - r1);
Prec r2 = 2 * rand.NextDouble(), dy = r2 < 1 ? Math.Sqrt(r2) - 1 : 1 - Math.Sqrt(2 - r2);
Vec d = cx * (((sx + .5 + dx) / 2 + x) / w - .5) +
cy * (((sy + .5 + dy) / 2 + y) / h - .5) + cam.Direction;
r += Radiance(new Ray(cam.Origin + d * 140, d.Norm), 0, rand) * (1.0 / samps);
}
c += r * 0.25;
}
}
pb.PutPixel(px, py, c);
}
}
}
void OnContext(IAsyncResult ar)
{
try {
var ctx = listener.EndGetContext(ar);
var path = ctx.Request.Url.LocalPath;
System.Console.WriteLine("{0} {1}", ctx.Request.HttpMethod, path);
if (ctx.Request.HttpMethod == "GET")
{
if (path == "/work")
{
var idx = rand.Next() % work.Count;
var w = work[idx];
if (w.Finished || w.HandedOut)
{
w = (from ww in work where !ww.Finished && !ww.HandedOut select ww).FirstOrDefault();
}
if (w != null)
{
w.Finished = false;
w.HandedOut = true;
ctx.Response.StatusCode = 200;
ctx.Response.ContentType = "text/xml";
w.Save(ctx.Response.OutputStream);
ctx.Response.Close();
}
else
{
ctx.Response.StatusCode = 404;
ctx.Response.Close();
}
}
else if (path == "/img" || path == "/favicon.ico")
{
ctx.Response.StatusCode = 200;
ctx.Response.ContentType = "image/png";
finalBuffer.SavePng(ctx.Response.OutputStream);
ctx.Response.Close();
}
else if (path == "/")
{
ctx.Response.StatusCode = 200;
ctx.Response.ContentType = "text/html";
using (var w = new StreamWriter(ctx.Response.OutputStream, Encoding.UTF8)) {
w.WriteLine("<!DOCTYPE html>");
w.WriteLine("<html><head><title>Frank's Distributed Raytracer</title>");
w.WriteLine("</head><body style='font-family:sans-serif;'>");
w.WriteLine("<h1>Frank's Distributed Raytracer</h1>");
w.WriteLine("<img src='/img' style='max-width:640px'>");
w.WriteLine("<h2>Progress</h2>");
var numFini = (from ww in work where ww.Finished select ww).Count();
var p = (numFini * 100) / work.Count;
w.WriteLine("<p><strong>{0} of {1}</strong> blocks complete ({2}%)</p>", numFini, work.Count, p);
var mins = 0.0;
var pps = 0.0;
var t = DateTime.UtcNow;
if (firstBlockTime.HasValue)
{
var dt = t - firstBlockTime.Value;
pps = (numFini - 1) * work[0].Width * work[0].Height / dt.TotalSeconds;
var tt = (dt.TotalMinutes * 100) / p;
mins = tt - dt.TotalMinutes;
}
w.WriteLine("<p><strong>{0}</strong> mins remaining ({1})</p>", (int)(mins + 0.5), DateTime.Now.AddMinutes(mins));
w.WriteLine("<p><strong>{0}</strong> pixels / sec</p>", (int)pps);
w.WriteLine("<h2>Scene</h2>");
w.WriteLine("<code><pre>");
w.WriteLine(HtmlEscape(scene.SaveXml()));
w.WriteLine("</pre></code>");
w.WriteLine("</body></html>");
}
ctx.Response.Close();
}
else
{
ctx.Response.StatusCode = 404;
ctx.Response.Close();
}
}
else
{
if (path.StartsWith("/work/") && path.EndsWith("/pixels"))
{
var wid = int.Parse(path.Split('/')[2]);
var w = work[wid];
var pb = PixelBuffer.OpenBinary(ctx.Request.InputStream);
finalBuffer.SetPixels(w.X, w.Y, pb);
w.Finished = true;
if (!firstBlockTime.HasValue)
{
firstBlockTime = DateTime.UtcNow;
}
ctx.Response.StatusCode = 200;
ctx.Response.ContentType = "text/plain";
ctx.Response.Close();
}
else
{
ctx.Response.StatusCode = 404;
ctx.Response.Close();
}
}
}
catch (Exception ex) {
System.Console.WriteLine("!! {0}: {1}", ex.GetType().Name, ex.Message);
throw;
}
finally {
listener.BeginGetContext(OnContext, null);
}
}
public void SetPixels(int pbx, int pby, PixelBuffer pb)
{
//Buffer [(Height - 1 - y)*Width + x] = color;
for (var y = 0; y < pb.Height; y++) {
for (var x = 0; x < pb.Width; x++) {
Buffer [(Height - 1 - (y+pby))*Width + x + pbx] = pb.Get (x, y);
}
}
}