static Hitable CornellBox()
{
var red = new Lambertian(new vec3(0.65f, 0.05f, 0.05f));
var white = new Lambertian(new vec3(0.73f, 0.73f, 0.73f));
var green = new Lambertian(new vec3(0.12f, 0.45f, 0.15f));
Material aluminum = new Metal(new vec3(0.8f, 0.85f, 0.88f), 0.3f);
var light = new DiffuseLight(new SolidTexture(new vec3(15, 15, 15)));
int i = 0;
Hitable[] hitables = new Hitable[8];
hitables[i++] = new YZRect(555, 0, 555, 0, 555, green, true);
hitables[i++] = new YZRect(0, 0, 555, 0, 555, red);
var lightRect = new XZRect(554, 213, 343, 227, 332, light, true);
hitables[i++] = lightRect;
hitables[i++] = new XZRect(0, 0, 555, 0, 555, aluminum);
hitables[i++] = new XZRect(555, 0, 555, 0, 555, white, true);
hitables[i++] = new XYRect(555, 0, 555, 0, 555, white, true);
//Hitable box = new Box(new vec3(0, 0, 0), new vec3(165, 165, 165), white);
//box = new Tranlate(new RotateY(box, -18), new vec3(130, 0, 65));
//hitables[i++] = box;
Sphere sp = new Sphere(new vec3(190, 90.5f, 190), 90f, new Dieletric(1.6f));
hitables[i++] = sp;
Hitable box2 = new Box(new vec3(0, 0, 0), new vec3(165, 330, 165), white);
box2 = new Tranlate(new RotateY(box2, 15), new vec3(265, 0, 295));
hitables[i++] = box2;
_lightPDf = new LightPDF(lightRect);
_spherePDF = new SpherePDF(sp);
return(new HitList(hitables.Where(p => p != null).ToArray()));
}
public Box(vec3 min, vec3 max, Material mat)
{
_aabb = new AABB(min, max);
var sides = new Hitable[6];
sides[0] = new XZRect(max.y, min.x, max.x, min.z, max.z, mat);
sides[1] = new XZRect(min.y, min.x, max.x, min.z, max.z, mat, true);
sides[2] = new YZRect(max.x, min.y, max.y, min.z, max.z, mat);
sides[3] = new YZRect(min.x, min.y, max.y, min.z, max.z, mat, true);
sides[4] = new XYRect(max.z, min.x, max.x, min.y, max.y, mat);
sides[5] = new XYRect(min.z, min.x, max.x, min.y, max.y, mat, true);
_sideList = new HitList(sides);
}