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()));
}
//class Scene : Hitable
//{
// AABB _box;
// Hitable _inner;
// public Scene(HitList l,float t0,float t1)
// {
// _box = l.BoundVolume(t0,t1);
// _inner = l;
// }
// public AABB BoundVolume(float t0, float t1)
// {
// return _box;
// }
// public bool Hit(Ray ray, float min, float max, out HitRecord r)
// {
// r = null;
// if(!_box.Hit(ray,min,max))
// {
// return false;
// }
// return _inner.Hit(ray, min, max, out r);
// }
//}
static Hitable random_scene(bool bvh)
{
int n = 500;
Hitable[] list = new Hitable[n + 1];
vec3 black = new vec3(0.1f, 0.1f, 0.2f);
vec3 white = new vec3(1f, 1f, 1f);
var check = new CheckTexture(black, white);
var noise = new NoiseTexture(new Noise());
list[0] = new Sphere(new vec3(0, -1000, 0), 1000, new Lambertian(noise));
int i = 1;
//for (int a = -11; a < 11; a++)
//{
// for (int b = -11; b < 11; b++)
// {
// float choose_mat = Exten.rand01();
// var center = new vec3(a + 0.9f * Exten.rand01(), 0.2f, b + 0.9f * Exten.rand01());
// if ((center - new vec3(4f, 0.2f, 0f)).length() > 0.9f)
// {
// if (choose_mat < 0.8)
// { // diffuse
// var color = new vec3(Exten.rand01() * Exten.rand01(), Exten.rand01() * Exten.rand01(), Exten.rand01() * Exten.rand01());
// var mat = new Lambertian(new SolidTexture(color));
// list[i++] = new Sphere(center, 0.2f,mat);
// }
// else if (choose_mat < 0.95f)
// { // metal
// list[i++] = new Sphere(center, 0.2f,
// new Metal(new vec3(0.5f * (1 + drand48()), 0.5f * (1 + drand48()), 0.5f * (1 + drand48())), 0.5f * drand48()));
// }
// else
// { // glass
// list[i++] = new Sphere(center, 0.2f, new Dieletric(1.5f));
// }
// }
// }
//}
//list[i++] = new Sphere(new vec3(2, 1, 0), 1.0f, new Dieletric(1.3f));
//list[i++] = new Sphere(new vec3(-3, 1, 2), 1.0f, new Metal(new vec3(0.4f, 0.2f, 0.1f),0.2f));
list[i++] = new Sphere(new vec3(4, 1, 0), 1.0f, new Lambertian(noise));
//list[i++] = new Sphere(new vec3(4, 1, -0.5f), 1.0f, new Metal(new vec3(0.7f, 0.6f, 0.5f), 0.0f));
var finalList = list.Where(p => p != null).ToArray();
if (!bvh)
{
return(new HitList(finalList));
}
else
{
//Array.Sort(finalList, new BVHNode.BVHComparer(0));
return(new BVHNode(finalList, 0, finalList.Length, 0, 1));
}
}
static Hitable SimpleLight()
{
Texture perlintext = new NoiseTexture(new Noise());
Hitable[] hitables = new Hitable[4];
int i = 0;
var tex2 = new SolidTexture(new vec3(4, 4, 4));
hitables[i++] = new Sphere(new vec3(0, -1000, 0), 1000, new Lambertian(perlintext));
hitables[i++] = new Sphere(new vec3(0, 2, 0), 2, new Lambertian(perlintext));
//hitables[i++] = new Sphere(new vec3(0, 7, 0), 2, new DiffuseLight(tex2));
hitables[i++] = new XYRect(-2, 3, 5, 1, 3, new DiffuseLight(tex2));
var finalList = hitables.Where(h => h != null).ToArray();
return(new BVHNode(finalList, 0, finalList.Length, 0, 1));
}
static Hitable FinalTest()
{
int nb = 20;
Hitable[] list = new Hitable[30];
Hitable[] boxlist = new Hitable[10000];
Material ground = new Lambertian(new SolidTexture(new vec3(0.48f, 0.83f, 0.53f)));
int b = 0;
for (int i = 0; i < nb; i++)
{
for (int j = 0; j < nb; j++)
{
float w = 100;
float x0 = -1000 + i * w;
float z0 = -1000 + j * w;
float y0 = 0;
float x1 = x0 + w;
float y1 = 100 * (Exten.rand01() + 0.01f);
float z1 = z0 + w;
boxlist[b++] = new Box(new vec3(x0, y0, z0), new vec3(x1, y1, z1), ground);
}
}
int l = 0;
list[l++] = new BVHNode(boxlist, 0, b, 0, 1);
Material light = new DiffuseLight(new SolidTexture(new vec3(7, 7, 7)));
list[l++] = new XZRect(554, 123, 423, 147, 412, light);
vec3 center = new vec3(400, 400, 200);
//public Sphere(vec3 c, vec3 c1, float r, Material m, float time1, float time2)
list[l++] = new Sphere(center, center + new vec3(30, 0, 0), 50, new Lambertian(new SolidTexture(new vec3(0.7f, 0.3f, 0.1f))), 0, 1);
list[l++] = new Sphere(new vec3(260, 150, 45), 50, new Dieletric(1.5f));
list[l++] = new Sphere(new vec3(0, 150, 145), 50, new Metal(new vec3(0.8f, 0.8f, 0.9f), 10.0f));
Hitable boundary = new Sphere(new vec3(360, 150, 145), 70, new Dieletric(1.5f));
list[l++] = boundary;
boundary = new Sphere(new vec3(0, 0, 0), 5000, new Dieletric(1.5f));
Texture pertext = new NoiseTexture(new Noise());
list[l++] = new Sphere(new vec3(220, 280, 300), 80, new Lambertian(pertext));
return(new HitList(list.Where(arg => arg != null).ToArray()));
}
static Hitable random_scene()
{
int n = 500;
Hitable[] list = new Hitable[n + 1];
list[0] = new Sphere(new UnityEngine.Vector3(0, -1000, 0), 1000, new Metal(new UnityEngine.Vector3(0.5f, 0.5f, 0.5f), 0.1f));
int i = 1;
for (int a = -11; a < 11; a++)
{
for (int b = -11; b < 11; b++)
{
float choose_mat = Exten.rand01();
var center = new UnityEngine.Vector3(a + 0.9f * Exten.rand01(), 0.2f, b + 0.9f * Exten.rand01());
if ((center - new UnityEngine.Vector3(4f, 0.2f, 0f)).length() > 0.9f)
{
if (choose_mat < 0.8)
{ // diffuse
list[i++] = new Sphere(center, 0.2f, new Lambertian(new UnityEngine.Vector3(Exten.rand01() * Exten.rand01(), Exten.rand01() * Exten.rand01(), Exten.rand01() * Exten.rand01())));
}
else if (choose_mat < 0.95f)
{ // metal
list[i++] = new Sphere(center, 0.2f,
new Metal(new UnityEngine.Vector3(0.5f * (1 + drand48()), 0.5f * (1 + drand48()), 0.5f * (1 + drand48())), 0.5f * drand48()));
}
else
{ // glass
list[i++] = new Sphere(center, 0.2f, new Dieletric(1.5f));
}
}
}
}
list[i++] = new Sphere(new UnityEngine.Vector3(2, 1, 0), 1.0f, new Dieletric(1.3f));
//list[i++] = new Sphere(new vec3(-3, 1, 2), 1.0f, new Metal(new vec3(0.4f, 0.2f, 0.1f),0.2f));
//list[i++] = new Sphere(new vec3(4, 1, 0), 1.0f, new Metal(new vec3(0.7f, 0.6f, 0.5f), 0.0f));
//list[i++] = new Sphere(new vec3(4, 1, -0.5f), 1.0f, new Metal(new vec3(0.7f, 0.6f, 0.5f), 0.0f));
return(new HitList(list.Where(p => p != null).ToArray()));
}
