/// <summary>
/// Renders the given scene to a bitmap, using one thread per line of pixels in the image.
/// </summary>
/// <param name="scene">The scene to render</param>
/// <returns>A bitmap of the rendered scene.</returns>
public void RenderSceneToBitmapThreaded(Scene scene, RenderBuffer renderBuffer, int width = -1, int height = -1)
{
if (width == -1 || height == -1)
{
width = renderSize.Width;
height = renderSize.Height;
}
else
{
renderSize = new Size(width, height);
}
var before = DateTime.UtcNow;
List<Task> tasks = new List<Task>();
for (int yCounter = height - 1; yCounter >= 0; yCounter--)
{
var y = yCounter;
var task = Task.Run(() =>
{
for (int xCounter = 0; xCounter < width; xCounter++)
{
var x = xCounter;
var viewPortX = ((2 * x) / (float)width) - 1;
var viewPortY = ((2 * y) / (float)height) - 1;
var color = TraceRayAgainstScene(GetRay(viewPortX, viewPortY), scene);
renderBuffer.SetColor(x, height - y - 1, ref color);
}
});
tasks.Add(task);
}
Task.WhenAll(tasks).Wait();
var after = DateTime.UtcNow;
System.Diagnostics.Debug.WriteLine("Total render time: " + (after - before).TotalMilliseconds + " ms");
}