public static void Main3()
{
int nx = 1280;
int ny = 640;
int ns = 16;
Vector3 lookfrom = new Vector3(-2, 2, 1);
Vector3 lookat = new Vector3(0, 0, -1);
Vector3 up = new Vector3(0, 1, 0);
RayCamera camera = new RayCamera(lookfrom, lookat, up, 35, (float)(nx) / (float)(ny));
HitList list = new HitList();
list.Add(new Sphere(new Vector3(0, 0, -1), 0.5f, new Lambertian(new Vector3(0.1f, 0.2f, 0.5f))));
list.Add(new Sphere(new Vector3(0, -100.5f, -1), 100, new Lambertian(new Vector3(0.8f, 0.8f, 0.0f))));
list.Add(new Sphere(new Vector3(1, 0, -1), 0.5f, new Metal(new Vector3(0.8f, 0.6f, 0.2f), 0.3f)));
list.Add(new Sphere(new Vector3(-1, 0, -1), 0.5f, new DielectricShlick(1.5f)));
list.Add(new Sphere(new Vector3(-1, 0, -1), -0.45f, new DielectricShlick(1.5f)));
Texture2D tex = ImageHelper.CreateImg(nx, ny);
for (int j = ny - 1; j >= 0; --j)
{
for (int i = 0; i < nx; ++i)
{
Vector3 color = Vector3.zero;
for (int k = 0; k < ns; ++k)
{
float u = (float)(i + Random.Range(0f, 1f)) / (float)(nx);
float v = (float)(j + Random.Range(0f, 1f)) / (float)(ny);
Ray r = camera.GetRay(u, v);
color += RayCast(r, list, 0);
}
color = color / (float)(ns);
color.x = Mathf.Sqrt(color.x);
color.y = Mathf.Sqrt(color.y);
color.z = Mathf.Sqrt(color.z);
ImageHelper.SetPixel(tex, i, j, color);
}
}
ImageHelper.SaveImg(tex, "Img/chapter10_3.png");
Debug.Log("Chapter 10_3 done");
}
public static void Main()
{
int nx = 1280;
int ny = 640;
int ns = 8;
RayCamera camera = new RayCamera();
HitList list = new HitList();
list.Add(new Sphere(new Vector3(0, 0, -1), 0.5f));
list.Add(new Sphere(new Vector3(0, -100.5f, -1), 100));
Texture2D tex = ImageHelper.CreateImg(nx, ny);
Texture2D tex2 = ImageHelper.CreateImg(nx, ny);
for (int j = ny - 1; j >= 0; --j)
{
for (int i = 0; i < nx; ++i)
{
Vector3 color = Vector3.zero;
for (int k = 0; k < ns; ++k)
{
float u = (float)(i + Random.Range(-1f, 1f)) / (float)(nx);
float v = (float)(j + Random.Range(-1f, 1f)) / (float)(ny);
Ray r = camera.GetRay(u, v);
color += RayCast(r, list);
}
color = color / (float)(ns);
ImageHelper.SetPixel(tex, i, j, color);
color.x = Mathf.Pow(color.x, 1 / 2.2f);
color.y = Mathf.Pow(color.y, 1 / 2.2f);
color.z = Mathf.Pow(color.z, 1 / 2.2f);
ImageHelper.SetPixel(tex2, i, j, color);
}
}
ImageHelper.SaveImg(tex, "Img/chapter7_1.png");
ImageHelper.SaveImg(tex2, "Img/chapter7_2.png");
Debug.Log("Done");
}
public static void Main()
{
int nx = 1280;
int ny = 640;
int ns = 64;
RayCamera camera = new RayCamera();
HitList list = new HitList();
list.Add(new Sphere(new Vector3(0, 0, -1), 0.5f, new Lambertian(new Vector3(0.8f, 0.3f, 0.3f), 0.382f)));
list.Add(new Sphere(new Vector3(0, -100.5f, -1), 100, new Lambertian(new Vector3(0.8f, 0.8f, 0.0f), 0.618f)));
list.Add(new Sphere(new Vector3(1, 0, -1), 0.5f, new Metal(new Vector3(0.8f, 0.6f, 0.2f), 0.3f)));
list.Add(new Sphere(new Vector3(-1, 0, -1), 0.5f, new Metal(new Vector3(0.8f, 0.8f, 0.8f), 1.0f)));
Texture2D tex = ImageHelper.CreateImg(nx, ny);
for (int j = ny - 1; j >= 0; --j)
{
for (int i = 0; i < nx; ++i)
{
Vector3 color = Vector3.zero;
for (int k = 0; k < ns; ++k)
{
float u = (float)(i + Random.Range(-1f, 1f)) / (float)(nx);
float v = (float)(j + Random.Range(-1f, 1f)) / (float)(ny);
Ray r = camera.GetRay(u, v);
color += RayCast(r, list, 0);
}
color = color / (float)(ns);
color.x = Mathf.Sqrt(color.x);
color.y = Mathf.Sqrt(color.y);
color.z = Mathf.Sqrt(color.z);
ImageHelper.SetPixel(tex, i, j, color);
}
}
ImageHelper.SaveImg(tex, "Img/chapter8fuzz2.png");
Debug.Log("Chapter 8 fuzz is done");
}
public static void Main()
{
int nx = 1280;
int ny = 640;
int ns = 16;
RayCamera camera = new RayCamera();
float R = Mathf.Cos(Mathf.PI / 4);
HitList list = new HitList();
list.Add(new Sphere(new Vector3(-R, 0, -1), R, new Lambertian(new Vector3(0f, 0f, 1f))));
list.Add(new Sphere(new Vector3(R, 0, -1), R, new Lambertian(new Vector3(1f, 0f, 0f))));
Texture2D tex = ImageHelper.CreateImg(nx, ny);
for (int j = ny - 1; j >= 0; --j)
{
for (int i = 0; i < nx; ++i)
{
Vector3 color = Vector3.zero;
for (int k = 0; k < ns; ++k)
{
float u = (float)(i + Random.Range(-1f, 1f)) / (float)(nx);
float v = (float)(j + Random.Range(-1f, 1f)) / (float)(ny);
Ray r = camera.GetRay(u, v);
color += RayCast(r, list, 0);
}
color = color / (float)(ns);
color.x = Mathf.Sqrt(color.x);
color.y = Mathf.Sqrt(color.y);
color.z = Mathf.Sqrt(color.z);
ImageHelper.SetPixel(tex, i, j, color);
}
}
ImageHelper.SaveImg(tex, "Img/chapter10_1.png");
Debug.Log("Chapter 10_1 done");
}
public static void Main()
{
int nx = 1280;
int ny = 640;
int ns = 64; // 一个像素需要采样64次
RayCamera camera = new RayCamera();
HitList list = new HitList();
list.Add(new Sphere(new Vector3(0, 0, -1), 0.5f));
list.Add(new Sphere(new Vector3(0, -100.5f, -1), 100));
Texture2D tex = ImageUtils.CreateImg(nx, ny);
// pixels are written from left to right, from top to bottom
for (int j = ny - 1; j >= 0; j--)
{
for (int i = 0; i < nx; i++)
{
Vector3 color = Vector3.zero;
// 对于每个射线，随机采样周围的8格，用平均颜色来作为该射线对应像素的颜色
// 一次采样需要解2个一元二次方程组。也就是说，一共需要解1280X640X64X2=104857600个一元二次方程组。
for (int k = 0; k < ns; k++)
{
float u = (i + Random.Range(-1f, 1f)) / nx;
float v = (j + Random.Range(-1f, 1f)) / ny;
Ray ray = camera.GetRay(u, v);
color += GetColor(ray, list);
}
color = color / ns;
ImageUtils.SetPixel(tex, i, j, color);
}
}
ImageUtils.SaveImg(tex, "OutputImg/chapter08.png");
}