override internal IntersectionPoint Intersect(Ray r, IntersectionPoint p)
{
double d = Distance(r);
if (d < p.distance)
{
Vector v = r.origin + ((d * r.direction) - center);
p = new IntersectionPoint(d, v.Normalized());
}
return(p);
}
// Normally we'd use double.Epsilon
public static void Main(String[] args, ILog ilog)
{
int n = 0;
if (args.Length > 0)
{
n = Int32.Parse(args [0]);
}
Scene scene = Scene.SphereScene(levels, new Vector(0.0, -1.0, 0.0), 1.0);
ilog.InfoFormat("P5");
ilog.InfoFormat("{0} {1}", n, n);
ilog.InfoFormat("255");
Stream stream = Stream.Null;
byte[] temp = new byte[1];
for (int y = n - 1; y >= 0; --y)
{
for (int x = 0; x < n; ++x)
{
double greyscale = 0.0;
for (int dx = 0; dx < ss; ++dx)
{
for (int dy = 0; dy < ss; ++dy)
{
Vector v = new Vector(
x + dx / (double)ss - n / 2.0
, y + dy / (double)ss - n / 2.0
, n);
Ray ray = new Ray(new Vector(0.0, 0.0, -4.0), v.Normalized());
greyscale += scene.TraceRay(ray,
new Vector(-1.0, -3.0, 2.0).Normalized());
}
}
temp [0] = (byte)(0.5 + 255.0 * greyscale / (ss * ss));
stream.Write(temp, 0, 1);
}
}
}
// Normally we'd use double.Epsilon
public static void Main (String[] args, ILog ilog)
{
int n = 0;
if (args.Length > 0)
n = Int32.Parse (args [0]);
Scene scene = Scene.SphereScene (levels, new Vector (0.0, -1.0, 0.0), 1.0);
ilog.InfoFormat ("P5");
ilog.InfoFormat ("{0} {1}", n, n);
ilog.InfoFormat ("255");
Stream stream = Stream.Null;
byte[] temp = new byte[1];
for (int y = n - 1; y >= 0; --y) {
for (int x = 0; x < n; ++x) {
double greyscale = 0.0;
for (int dx = 0; dx < ss; ++dx) {
for (int dy = 0; dy < ss; ++dy) {
Vector v = new Vector (
x + dx / (double)ss - n / 2.0
, y + dy / (double)ss - n / 2.0
, n);
Ray ray = new Ray (new Vector (0.0, 0.0, -4.0), v.Normalized ());
greyscale += scene.TraceRay (ray,
new Vector (-1.0, -3.0, 2.0).Normalized ());
}
}
temp [0] = (byte)(0.5 + 255.0 * greyscale / (ss * ss));
stream.Write (temp, 0, 1);
}
}
}
