void init_vector_table(int seed)
{
float r1, r2;
float x, y, z;
float r, phi;
MathHelper.SetRandomSeed(seed_value);
MultiJittered sample_ptr = new MultiJittered(256, 1);
for (int j = 0; j < kTableSize; j++)
{
Vector2 sample_point = sample_ptr.SampleOneSet();
r1 = sample_point.X;
r2 = sample_point.Y;
z = 1.0f - 2.0f * r1;
r = MathHelper.Sqrt(1.0f - z * z);
phi = MathHelper.TwoPI * r2;
x = r * MathHelper.Cos(phi);
y = r * MathHelper.Sin(phi);
vector_table[j] = Vector3.Normalize(new Vector3(x, y, z));
}
}
void build2()
{
int ns = 100;
world.ViewPlane = new ViewPlane();
world.ViewPlane.HRes = world.ViewPlane.VRes = 400;
world.ViewPlane.SetSamples(ns);
world.Tracer = new RayCast(world);
MultiJittered sampler = new MultiJittered(ns);
AmbientOccluder occulder = new AmbientOccluder();
occulder.RadianceScale = 1.0f;
occulder.Color = Vector3.One;
occulder.MinAmount = 0.0f;
occulder.SetSampler(sampler);
occulder.Shadows = true;
world.AmbientLight = occulder;
Directional light_ptr = new Directional();
light_ptr.Direction = Vector3.Normalize(new Vector3(100, 100, 100));
light_ptr.RadianceScale = 1.0f;
light_ptr.Shadows = true;
light_ptr.Color = new Vector3(1);
world.Lights.Add(light_ptr);
Pinhole cam = new Pinhole();
cam.Position = new Vector3(25, 20, 45);
cam.Target = new Vector3(0, 1, 0);
cam.Distance = 5000;
world.Camera = cam;
Matte matte = new Matte(0.25f, 0.7f, new Vector3(1, 1, 0));
matte.Shadows = true;
Sphere s = new Sphere(new Vector3(0, 1, 0), 1);
s.Shadows = true;
s.SetMaterial(matte);
world.Objects.Add(s);
Matte matte2 = new Matte(0.75f, 0, new Vector3(1, 1, 1));
matte2.Shadows = true;
Plane p = new Plane(Vector3.Zero, new Vector3(0, 1, 0));
p.Shadows = true;
p.SetMaterial(matte2);
world.Objects.Add(p);
}
public void SetSamples(int num_samples, float exp)
{
Sampler = new MultiJittered(num_samples);
Sampler.MapSamplesToHemisphere(exp);
}