static public Bitmap ch5(int width, int height)
{
Bitmap bmp = new Bitmap(width, height);
Vector3 lower_left_corner = new Vector3(-2, -1, -1);
Vector3 horizontal = new Vector3(4, 0, 0);
Vector3 vertical = new Vector3(0, 2, 0);
Vector3 origin = new Vector3(0, 0, 0);
float u, v;
int ir, ig, ib;
Vector3 col;
Hitable[] objList = new Hitable[2];
objList[0] = new Sphere(new Vector3(0, 0, -1), 0.5f);
objList[1] = new Sphere(new Vector3(0, -100.5f, -1), 100);
HitableList hitableList = new HitableList(objList);
for (int j = 0; j < height; ++j)
{
for (int i = 0; i < width; ++i)
{
u = (float)i / (float)width;
v = (float)j / (float)height;
col = ch5_color(new Ray(origin, lower_left_corner + horizontal * u + vertical * v), hitableList);
ir = (int)(col.r() * 255.99);
ig = (int)(col.g() * 255.99);
ib = (int)(col.b() * 255.99);
bmp.SetPixel(i, height - j - 1, Color.FromArgb(ir, ig, ib));
}
}
return(bmp);
}
static public Bitmap ch11(int width, int height)
{
Bitmap bmp = new Bitmap(width, height);
float u, v;
int ir, ig, ib;
Vector3 col;
Hitable[] objList = new Hitable[5];
objList[0] = new Sphere(new Vector3(0, 0, -1), 0.5f, new Lambertian(new Vector3(.1f, .2f, .5f)));
objList[1] = new Sphere(new Vector3(0, -100.5f, -1), 100f, new Lambertian(new Vector3(.8f, .8f, 0)));
objList[2] = new Sphere(new Vector3(1, 0, -1), 0.5f, new Metal(new Vector3(.8f, .6f, .2f)));
objList[3] = new Sphere(new Vector3(-1, 0, -1), 0.5f, new Dielectric(1.5f));
objList[4] = new Sphere(new Vector3(-1, 0, -1), -0.45f, new Dielectric(1.5f));
HitableList hitableList = new HitableList(objList);
Vector3 lookfrom = new Vector3(3f, 3f, 2f);
Vector3 lookat = new Vector3(0f, 0f, -1f);
float dist_to_focus = (lookfrom - lookat).length();
float aperture = 2.0f;
Camera cam = new Camera(lookfrom, lookat, new Vector3(0f, 1f, 0f), 20f, (float)width / (float)height, aperture, dist_to_focus);
int sampleCount = 10;
Random rdm = new Random(Guid.NewGuid().GetHashCode());
for (int j = 0; j < height; ++j)
{
for (int i = 0; i < width; ++i)
{
col = new Vector3(0, 0, 0);
for (int c = 0; c < sampleCount; ++c)
{
u = (float)(i + rdm.NextDouble()) / width;
v = (float)(j + rdm.NextDouble()) / height;
col += ch8_color(cam.getRayDOF(u, v), hitableList, 10);
}
col /= (float)sampleCount;
ir = (int)(col.r() * 255.99);
ig = (int)(col.g() * 255.99);
ib = (int)(col.b() * 255.99);
bmp.SetPixel(i, height - j - 1, Color.FromArgb(ir, ig, ib));
}
}
return(bmp);
}
static public Bitmap ch10(int width, int height)
{
Bitmap bmp = new Bitmap(width, height);
float u, v;
int ir, ig, ib;
Vector3 col;
Hitable[] objList = new Hitable[5];
objList[0] = new Sphere(new Vector3(0, 0, -1), 0.5f, new Lambertian(new Vector3(.8f, .3f, .3f)));
objList[1] = new Sphere(new Vector3(0, -100.5f, -1), 100, new Lambertian(new Vector3(.8f, .8f, 0)));
objList[2] = new Sphere(new Vector3(1, 0, -1), 0.5f, new Metal(new Vector3(.8f, .6f, .2f)));
objList[3] = new Sphere(new Vector3(-1, 0, -1), 0.5f, new Dielectric(1.5f));
objList[4] = new Sphere(new Vector3(-1, 0, -1), -0.45f, new Dielectric(1.5f));
HitableList hitableList = new HitableList(objList);
Camera cam = new Camera(new Vector3(-2, 2, 1), new Vector3(0, 0, -1), new Vector3(0, 1, 0), 90, (float)width / (float)height);
int sampleCount = 10;
Random rdm = new Random(Guid.NewGuid().GetHashCode());
for (int j = 0; j < height; ++j)
{
for (int i = 0; i < width; ++i)
{
col = new Vector3(0, 0, 0);
for (int c = 0; c < sampleCount; ++c)
{
u = (float)(i + rdm.NextDouble()) / width;
v = (float)(j + rdm.NextDouble()) / height;
col += ch8_color(cam.getRay(u, v), hitableList, 10);
}
col /= (float)sampleCount;
ir = (int)(col.r() * 255.99);
ig = (int)(col.g() * 255.99);
ib = (int)(col.b() * 255.99);
bmp.SetPixel(i, height - j - 1, Color.FromArgb(ir, ig, ib));
}
}
return(bmp);
}
static public HitableList random_scene()
{
Random rdm = new Random(Guid.NewGuid().GetHashCode());
Hitable[] objList = new Hitable[501];
int i = 0;
objList[i] = new Sphere(new Vector3(0f, -1000f, 0f), 1000f, new Lambertian(new Vector3(.5f, .5f, .5f)));
for (int a = -11; a < 11; ++a)
{
for (int b = -11; b < 11; ++b)
{
double choose_mat = rdm.NextDouble();
Vector3 center = new Vector3((float)(a + 0.9 * rdm.NextDouble()), 0.2f, (float)(b + 0.9 * rdm.NextDouble()));
if ((center - new Vector3(4f, .2f, 0f)).squared_length() > 0.81f)
{
if (choose_mat < 0.8) // diffuse
{
++i;
objList[i] = new Sphere(center, 0.2f, new Lambertian(new Vector3((float)rdm.NextDouble(), (float)rdm.NextDouble(), (float)rdm.NextDouble())));
}
else if (choose_mat < 0.95)
{
++i;
objList[i] = new Sphere(center, 0.2f, new Metal(new Vector3((float)(0.5f * (1 + rdm.NextDouble())), (float)(0.5f * (1 + rdm.NextDouble())), (float)(0.5f * (1 + rdm.NextDouble())))));
}
else
{
++i;
objList[i] = new Sphere(center, 0.2f, new Dielectric(1.5f));
}
}
}
}
objList[++i] = new Sphere(new Vector3(0, 1, 0), 1.0f, new Dielectric(1.5f));
objList[++i] = new Sphere(new Vector3(-4, 1, 0), 1.0f, new Lambertian(new Vector3(0.4f, 0.2f, 0.1f)));
objList[++i] = new Sphere(new Vector3(4, 1, 0), 1.0f, new Metal(new Vector3(0.7f, 0.6f, 0.5f), 0.0f));
return(new HitableList(objList));
}
static public Bitmap ch7(int width, int height)
{
Bitmap bmp = new Bitmap(width, height);
float u, v;
int ir, ig, ib;
Vector3 col;
Hitable[] objList = new Hitable[2];
objList[0] = new Sphere(new Vector3(0, 0, -1), 0.5f);
objList[1] = new Sphere(new Vector3(0, -100.5f, -1), 100);
HitableList hitableList = new HitableList(objList);
Camera cam = new Camera();
int sampleCount = 10;
Random rdm = new Random();
for (int j = 0; j < height; ++j)
{
for (int i = 0; i < width; ++i)
{
col = new Vector3(0, 0, 0);
for (int c = 0; c < sampleCount; ++c)
{
u = ((float)i + (float)rdm.NextDouble()) / (float)width;
v = ((float)j + (float)rdm.NextDouble()) / (float)height;
col += ch7_color(cam.getRay(u, v), hitableList);
}
col /= (float)sampleCount;
ir = (int)(col.r() * 255.99);
ig = (int)(col.g() * 255.99);
ib = (int)(col.b() * 255.99);
bmp.SetPixel(i, height - j - 1, Color.FromArgb(ir, ig, ib));
}
}
return(bmp);
}