public PhongMaterial(PhongMaterial m)
{
Color = (double[])m.Color.Clone();
Ka = m.Ka;
Kd = m.Kd;
Ks = m.Ks;
H = m.H;
Kt = m.Kt;
n = m.n;
}
/// <summary>
/// Infinite plane with two spheres on it (one of them is transparent)
/// </summary>
public static void TwoSpheres( IRayScene sc )
{
Debug.Assert( sc != null );
// CSG scene:
CSGInnerNode root = new CSGInnerNode( SetOperation.Union );
root.SetAttribute( PropertyName.REFLECTANCE_MODEL, new PhongModel() );
root.SetAttribute( PropertyName.MATERIAL, new PhongMaterial( new double[] { 1.0, 0.8, 0.1 }, 0.1, 0.6, 0.4, 128 ) );
sc.Intersectable = root;
// Background color:
sc.BackgroundColor = new double[] { 0.0, 0.05, 0.07 };
// Camera:
sc.Camera = new StaticCamera( new Vector3d( 0.7, 0.5, -5.0 ),
new Vector3d( 0.0, -0.18, 1.0 ),
50.0 );
// Light sources:
sc.Sources = new LinkedList<ILightSource>();
sc.Sources.Add( new AmbientLightSource( 0.8 ) );
sc.Sources.Add( new PointLightSource( new Vector3d( -5.0, 4.0, -3.0 ), 1.2 ) );
// --- NODE DEFINITIONS ----------------------------------------------------
// Transparent sphere:
Sphere s;
s = new Sphere();
PhongMaterial pm = new PhongMaterial( new double[] { 0.0, 0.2, 0.1 }, 0.05, 0.05, 0.1, 128 );
pm.n = 1.6;
pm.Kt = 0.9;
s.SetAttribute( PropertyName.MATERIAL, pm );
root.InsertChild( s, Matrix4d.Identity );
// Opaque sphere:
s = new Sphere();
root.InsertChild( s, Matrix4d.Scale( 1.2 ) * Matrix4d.CreateTranslation( 1.5, 0.2, 2.4 ) );
// Infinite plane with checker:
Plane pl = new Plane();
pl.SetAttribute( PropertyName.COLOR, new double[] { 0.3, 0.0, 0.0 } );
pl.SetAttribute( PropertyName.TEXTURE, new CheckerTexture( 0.6, 0.6, new double[] { 1.0, 1.0, 1.0 } ) );
root.InsertChild( pl, Matrix4d.RotateX( -MathHelper.PiOver2 ) * Matrix4d.CreateTranslation( 0.0, -1.0, 0.0 ) );
}
public double[] ColorReflection(IMaterial material, Vector3d normal, Vector3d input, Vector3d output, ReflectionComponent comp)
{
if (!(material is PhongMaterial))
{
return(null);
}
PhongMaterial mat = (PhongMaterial)material;
int bands = mat.Color.Length;
double[] result = new double[bands];
bool viewOut = Vector3d.Dot(output, normal) > 0.0;
double coef;
if (input.Equals(Vector3d.Zero)) // ambient term only..
{
// dim ambient light if viewer is inside
coef = viewOut ? mat.Ka : (mat.Ka * mat.Kt);
for (int i = 0; i < bands; i++)
{
result[i] = coef * mat.Color[i];
}
return(result);
}
// directional light source:
input.Normalize();
double cosAlpha = Vector3d.Dot(input, normal);
bool lightOut = cosAlpha > 0.0;
double ks = mat.Ks;
double kd = mat.Kd;
double kt = mat.Kt;
Vector3d r = Vector3d.Zero;
coef = 1.0;
if (viewOut == lightOut) // viewer and source are on the same side..
{
if ((comp & ReflectionComponent.SPECULAR_REFLECTION) != 0)
{
double cos2 = cosAlpha + cosAlpha;
r = normal * cos2 - input;
if (!lightOut && // total reflection check
-cosAlpha <= mat.cosTotal)
{
if ((ks += kt) + kd > 1.0)
{
ks = 1.0 - kd;
}
}
}
}
else // opposite sides => use specular refraction
{
if ((comp & ReflectionComponent.SPECULAR_REFRACTION) != 0)
{
r = Geometry.SpecularRefraction(normal, mat.n, input);
}
coef = kt;
}
double diffuse = (comp & ReflectionComponent.DIFFUSE) == 0 ? 0.0 : coef *kd *Math.Abs(cosAlpha);
double specular = 0.0;
if (r != Vector3d.Zero)
{
double cosBeta = Vector3d.Dot(r, output);
if (cosBeta > 0.0)
{
specular = coef * ks * Arith.Pow(cosBeta, mat.H);
}
}
for (int i = 0; i < bands; i++)
{
result[i] = diffuse * mat.Color[i] + specular;
}
return(result);
}
/// <summary>
/// Creates default ray-rendering scene.
/// </summary>
public static IRayScene Init(IRayScene sc, string param)
{
// !!!{{ TODO: .. and use your time-dependent objects to construct the scene
// This code is based on Scenes.TwoSpheres():
// CSG scene:
CSGInnerNode root = new CSGInnerNode(SetOperation.Union);
root.SetAttribute(PropertyName.REFLECTANCE_MODEL, new PhongModel());
root.SetAttribute(PropertyName.MATERIAL, new PhongMaterial(new double[] { 1.0, 0.8, 0.1 }, 0.1, 0.6, 0.4, 128));
sc.Intersectable = root;
// Background color:
sc.BackgroundColor = new double[] { 0.0, 0.05, 0.07 };
// Camera:
AnimatedCamera cam = new AnimatedCamera(new Vector3d(0.7, -0.4, 0.0),
new Vector3d(0.7, 0.8, -6.0),
50.0);
cam.End = 20.0; // one complete turn takes 20.0 seconds
AnimatedRayScene asc = sc as AnimatedRayScene;
if (asc != null)
{
asc.End = 20.0;
}
sc.Camera = cam;
//sc.Camera = new StaticCamera( new Vector3d( 0.7, 0.5, -5.0 ),
// new Vector3d( 0.0, -0.18, 1.0 ),
// 50.0 );
// Light sources:
sc.Sources = new LinkedList <ILightSource>();
sc.Sources.Add(new AmbientLightSource(0.8));
sc.Sources.Add(new PointLightSource(new Vector3d(-5.0, 4.0, -3.0), 1.2));
// --- NODE DEFINITIONS ----------------------------------------------------
// Params dictionary:
Dictionary <string, string> p = Util.ParseKeyValueList(param);
// n = <index-of-refraction>
double n = 1.6;
Util.TryParse(p, "n", ref n);
// Transparent sphere:
Sphere s;
s = new Sphere();
PhongMaterial pm = new PhongMaterial(new double[] { 0.0, 0.2, 0.1 }, 0.03, 0.03, 0.08, 128);
pm.n = n;
pm.Kt = 0.9;
s.SetAttribute(PropertyName.MATERIAL, pm);
root.InsertChild(s, Matrix4d.Identity);
// Opaque sphere:
s = new Sphere();
root.InsertChild(s, Matrix4d.Scale(1.2) * Matrix4d.CreateTranslation(1.5, 0.2, 2.4));
// Infinite plane with checker:
Plane pl = new Plane();
pl.SetAttribute(PropertyName.COLOR, new double[] { 0.3, 0.0, 0.0 });
pl.SetAttribute(PropertyName.TEXTURE, new CheckerTexture(0.6, 0.6, new double[] { 1.0, 1.0, 1.0 }));
root.InsertChild(pl, Matrix4d.RotateX(-MathHelper.PiOver2) * Matrix4d.CreateTranslation(0.0, -1.0, 0.0));
// !!!}}
return(sc);
}
public PhongMaterial( PhongMaterial m )
{
Color = (double[])m.Color.Clone();
Ka = m.Ka;
Kd = m.Kd;
Ks = m.Ks;
H = m.H;
Kt = m.Kt;
n = m.n;
}
