public Ray GetRay(double s, double t)
{
Vector3 rd = LensRadius * VectorHelpers.GetRandomInUnitDisk();
Vector3 offset = U * rd.X + V * rd.Y;
var origin = Origin + offset;
var direction = LowerLeftCorner + new Vector3((float)(s * Horizontal.X), (float)(s * Horizontal.Y), (float)(s * Horizontal.Z)) + new Vector3((float)(t * Vertical.X), (float)(t * Vertical.Y), (float)(t * Vertical.Z)) - origin;
return(new Ray(origin, direction));
}
public static void Render(int _bpp, byte[] buffer)
{
Stopwatch st = new Stopwatch();
st.Start();
bpp = _bpp;
//IScene scene = new ToyPathTracerScene();
//IScene scene = new BookScene();
//IScene scene = new TwoSpheresScene();
IScene scene = new LightScene();
World = scene.GetSceneWorld();
Camera = scene.GetDefaultCamera((1f * IMG_WIDTH) / IMG_HEIGHT);
World.RebuildBvhTree();
Parallel.For(0, IMG_HEIGHT, y =>
{
for (int x = 0; x < IMG_WIDTH; x++)
{
Vector3 color = Vector3.Zero;
for (uint sample = 0; sample < AA_POINTS; sample++)
{
double xOffset = (x + VectorHelpers.RandomFloat() - 0.5f) / ((double)IMG_WIDTH);
double yOffset = (y + VectorHelpers.RandomFloat() - 0.5f) / ((double)IMG_HEIGHT);
Ray r = Camera.GetRay(xOffset, yOffset);
color += Color(r, 0);
}
color /= AA_POINTS;
int offset = CoordsToBufferIndex(x, y);
buffer[offset++] = DoubleToByte(color.X);
buffer[offset++] = DoubleToByte(color.Y);
buffer[offset++] = DoubleToByte(color.Z);
}
});
st.Stop();
Console.WriteLine("Scene rendered in " + st.ElapsedMilliseconds + " ms.");
}
