public Color_dbl Blend(Color_dbl other, double weight)
{
Color_dbl result = new Color_dbl(this);
result = this * (1 - weight) + other * weight;
return(result);
}
public Light(Vector pos, Color_dbl color)
{
Position = pos;
Color = color;
strength = 10;
}
static public Color_dbl operator /(Color_dbl col, double f)
{
Color_dbl result = new Color_dbl();
result.R = col.R / f;
result.G = col.G / f;
result.B = col.B / f;
return(result);
}
static public Color_dbl operator *(Color_dbl c1, Color_dbl c2)
{
Color_dbl result = new Color_dbl();
result.R = c1.R * c2.R;
result.G = c1.G * c2.G;
result.B = c1.B * c2.B;
return(result);
}
private Color_dbl RayTrace(IntersectionInfo info, Ray ray, Scene scene, int depth)
{
Color_dbl color = info.Color * scene.ambience;
foreach (Light l in scene.lights)
{
Vector v = (l.Position - info.pos).normalize(); // diffuse
double L = v.dot(info.normal);
if (L > 0.0f)
{
color += info.Color * l.Color * L;
}
if (depth < 5)
{
//shadows
IntersectionInfo shadow_info = new IntersectionInfo();
Ray toLight = new Ray(info.pos, v);
shadow_info = TestIntersection(toLight, scene, info.hit_object);
if (shadow_info.is_hit && shadow_info.hit_object != info.hit_object)
{
color *= 0.5;
}
//reflections
if (info.hit_object.Material.Reflection > 0)
{
Ray reflectionray = new Ray(info.pos, ray.Direction + info.normal * 2 * -info.normal.dot(ray.Direction));
IntersectionInfo ref_info = TestIntersection(reflectionray, scene, info.hit_object);
if (ref_info.is_hit && ref_info.dist > 0)
{
ref_info.Color = RayTrace(ref_info, reflectionray, scene, depth + 1);
}
else
{
ref_info.Color = scene.backColor;
}
color = color.Blend(ref_info.Color, info.hit_object.Material.Reflection);
}
}
}
color.Correct();
return(color);
}
public void SetTest()
{
//eye_pos = new Vector(0, 0, -15);
//eye_dir = new Vector(-0.2,0,5);
eye_pos = new Vector(0, 0, -15);
eye_dir = new Vector(-0.2, 0, 5);
backColor = new Color_dbl(0.5, 0.5, 0.5);
ambience = 0.4;
lights.Add(new Light(new Vector(5, 10, -1), new Color_dbl(0.8, 0.0, 0.0)));
lights.Add(new Light(new Vector(-3, 5, -10), new Color_dbl(0.8, 0.8, 0.8)));
Vector t = new Vector(-0.5, 0.5, -2);
Material m = new Material(new Color_dbl(1.0, 0.85, 0.85)); // black mirror
m.Reflection = 0.2;
Sphere s = new Sphere(t, 1.2, m);
objects.Add(s);
Vector t1 = new Vector(-2, 2, -4);
Material m1 = new Material(new Color_dbl(0.1, 0.2, 0.2)); // pink glossy
m1.Reflection = 0.7;
Sphere s1 = new Sphere(t1, 0.5, m1);
objects.Add(s1);
Vector t2 = new Vector(2, 0, -2);
Material m2 = new Material(new Color_dbl(0.8, 0.9, 0.8)); // black glossy
m2.Reflection = 0.1;
Sphere s2 = new Sphere(t2, 0.7, m2);
objects.Add(s2);
Plane p = new Plane(new Vector(-0.1, 0.9, -0.5).normalize(), 0, new Material(new Color_dbl(0.4, 1.0, 1.0)));
p.Material.Reflection = 0.5;
objects.Add(p);
}
public Color_dbl(Color_dbl other)
{
R = other.R;
G = other.G;
B = other.B;
}
public Material(int r, int g, int b)
{
color = new Color_dbl(r, g, b);
}
public Material(Color_dbl c)
{
color = c;
}
