Color[] CreateColorForTestAntialiasing(int width, int height)
{
//视锥体的左下角、长宽和起始扫射点设定
Vector3 lowLeftCorner = new Vector3(-2, -1, -1);
Vector3 horizontal = new Vector3(4, 0, 0);
Vector3 vertical = new Vector3(0, 2, 0);
Vector3 original = new Vector3(0, 0, 0);
int l = width * height;
HitableList hitableList = new HitableList();
hitableList.list.Add(new SimpleSphere(new Vector3(0, 0, -1), 0.5f));
hitableList.list.Add(new SimpleSphere(new Vector3(0, -100.5f, -1), 100f));
Color[] colors = new Color[l];
SimpleCamera camera = new SimpleCamera(original, lowLeftCorner, horizontal, vertical);
float recip_width = 1f / width;
float recip_height = 1f / height;
for (int j = height - 1; j >= 0; j--)
{
for (int i = 0; i < width; i++)
{
Color color = new Color(0, 0, 0);
for (int s = 0; s < SAMPLE; s++)
{
Ray r = camera.CreateRay((i + _M.R()) * recip_width, (j + _M.R()) * recip_height);
color += GetColorForTestAntialiasing(r, hitableList);
}
color *= SAMPLE_WEIGHT;
color.a = 1f;
colors[i + j * width] = color;
}
}
return(colors);
}
Color[] CreateColorForTestMetal(int width, int height)
{
//视锥体的左下角、长宽和起始扫射点设定
Vector3 lowLeftCorner = new Vector3(-4, -1, -1);
Vector3 horizontal = new Vector3(8, 0, 0);
Vector3 vertical = new Vector3(0, 2, 0);
Vector3 original = new Vector3(0, 0, 0);
int l = width * height;
HitableList hitableList = new HitableList();
hitableList.list.Add(new Sphere(new Vector3(0, 0, -1), 0.5f, new Lambertian(new Color(0.3f, 0.3f, 0.3f))));
hitableList.list.Add(new Sphere(new Vector3(0, -100.5f, -1), 100f, new Lambertian(new Color(0.8f, 0.8f, 0.0f))));
hitableList.list.Add(new Sphere(new Vector3(-1, 0, -1), 0.5f, new Metal(new Color(0.8f, 0.8f, 0.8f), 0.3f))); //Metal 的带个参数是albedo 反照率
hitableList.list.Add(new Sphere(new Vector3(1, 0, -1), 0.5f, new Metal(new Color(0.8f, 0.8f, 0.8f), 0.0f))); // 设置fuzz为0 表示一个干净的镜面
Color[] colors = new Color[l];
//之前的视觉锥体变形比较厉害 现在把摄像机离远一点
//右手坐标系 屏幕的z轴是 -1
SimpleCamera camera = new SimpleCamera(original + new Vector3(0, 0, 3), lowLeftCorner, horizontal, vertical);
float recip_width = 1f / width;
float recip_height = 1f / height;
// Debug.LogFormat("Hitable discriminant {0} {1}", recip_width, recip_height);
for (int j = height - 1; j >= 0; j--)
{
for (int i = 0; i < width; i++)
{
if (i % 10 == 0 && j % 10 == 0)
{
Debug.LogFormat("r u v {0} {1} {2} {3}", i, j, (i + _M.R()) * recip_width, (j + _M.R()) * recip_height);
}
Color color = new Color(0, 0, 0);
for (int s = 0; s < SAMPLE / 10; s++)
{
// 光线的出发点就是摄像机
// (i + _M.R()) * recip_width 都是小范围发散光线
Ray r = camera.CreateRay((i + _M.R()) * recip_width, (j + _M.R()) * recip_height);
color += GetColorForTestMetal(r, hitableList, 0);
}
color *= SAMPLE_WEIGHT * 10f;
//为了使球体看起来更亮，改变gamma值
color = new Color(Mathf.Sqrt(color.r), Mathf.Sqrt(color.g), Mathf.Sqrt(color.b), 1f);
color.a = 1f;
colors[i + j * width] = color;
}
}
return(colors);
}
// 测试透明模型
// 传统右手坐标系 Z值越小 离人眼越近
// 之前调整参数 光源在 0 0 3 的位置
// 屏幕Z轴在 -3 的位置
Color[] CreateColorForTestDielectric(int width, int height)
{
// 透明材料（例如水，玻璃和钻石）是电介质。 当光线射到它们上时，它分裂为反射射线和折射（透射）射线。
//视锥体的左下角、长宽和起始扫射点设定
Vector3 lowLeftCorner = new Vector3(-2, -1, -3);
Vector3 horizontal = new Vector3(4, 0, 0);
Vector3 vertical = new Vector3(0, 2, 0);
Vector3 original = new Vector3(0, 0, 0);
int l = width * height;
HitableList hitableList = new HitableList();
// 漫反射 中间的红色金属球
hitableList.list.Add(new Sphere(new Vector3(0, 0, -1), 0.5f, new Lambertian(new Color(0.8f, 0.3f, 0.3f))));
// 漫反射 //底部的绿色球
hitableList.list.Add(new Sphere(new Vector3(0, -100.5f, -1), 100f, new Lambertian(new Color(0.8f, 0.8f, 0.0f))));
// 右侧的金属球
hitableList.list.Add(new Sphere(new Vector3(1, 0, -1), 0.5f, new Metal(new Color(0.8f, 0.6f, 0.2f), 0f)));
// 左侧透明球
hitableList.list.Add(new Sphere(new Vector3(-1, 0, -1), 0.5f, new Dielectirc(1.5f)));
// 1.3 是水的折射率 玻璃折射率是1.5
Color[] colors = new Color[l];
// 为了减小形变 让摄像头离屏幕远一点
SimpleCamera camera = new SimpleCamera(original + new Vector3(0, 0, 3), lowLeftCorner, horizontal, vertical);
float recip_width = 1f / width;
float recip_height = 1f / height;
for (int j = height - 1; j >= 0; j--)
{
for (int i = 0; i < width; i++)
{
Color color = new Color(0, 0, 0);
for (int s = 0; s < SAMPLE / 10; s++)
{
Ray r = camera.CreateRay((i + _M.R()) * recip_width, (j + _M.R()) * recip_height);
color += GetColorForTestDielectric(r, hitableList, 0);
}
color *= SAMPLE_WEIGHT * 10f;
//为了使球体看起来更亮，改变gamma值
color = new Color(Mathf.Sqrt(color.r), Mathf.Sqrt(color.g), Mathf.Sqrt(color.b), 1f);
color.a = 1f;
colors[i + j * width] = color;
}
}
return(colors);
}
Color[] CreateColorForTestAntialiasing(int width, int height)
{
// width height 是像素点单位400 200
// 视锥体的左下角、长宽和起始扫射点设定
Vector3 lowLeftCorner = new Vector3(-2, -1, -1);
Vector3 horizontal = new Vector3(4, 0, 0);
Vector3 vertical = new Vector3(0, 2, 0);
Vector3 original = new Vector3(0, 0, 0);
int l = width * height;
HitableList hitableList = new HitableList();
//这样的球在偏右的位置
//hitableList.list.Add(new SimpleSphere(new Vector3(1, 0, -1), 0.5f));
hitableList.list.Add(new SimpleSphere(new Vector3(0, 0, -1), 0.5f));
hitableList.list.Add(new SimpleSphere(new Vector3(0, -100.5f, -1), 100f));
Color[] colors = new Color[l];
// 摄像头在0 0 0的位置
// 屏幕在 z轴 -1 的位置
// 传统的右手坐标系
SimpleCamera camera = new SimpleCamera(original + new Vector3(0, 0, 3), lowLeftCorner, horizontal, vertical);
float recip_width = 1f / width; // 1/400
float recip_height = 1f / height; // 1/200
for (int j = height - 1; j >= 0; j--)
{
for (int i = 0; i < width; i++)
{
Color color = new Color(0, 0, 0);
// 每个像素点都再发射100条光线去采样计算
for (int s = 0; s < SAMPLE / 10; s++)
{
// _M.R() 生成0~1随机数
// 创建的ray 出发点在球心 也就是original //注意 ！！ CreateRay包含了vertical 和 horizontal 的尺寸计算
Ray r = camera.CreateRay((i + _M.R()) * recip_width, (j + _M.R()) * recip_height);
//下面关闭抗锯齿的情形，就和第5版一样的
//Ray r = camera.CreateRay(i * recip_width, j * recip_height);
color += GetColorForTestAntialiasing(r, hitableList);
}
color *= SAMPLE_WEIGHT * 10;
color.a = 1f;
colors[i + j * width] = color;
}
}
return(colors);
}
Color[] CreateColorForTestDielectric(int width, int height)
{
//视锥体的左下角、长宽和起始扫射点设定
Vector3 lowLeftCorner = new Vector3(-2, -1, -1);
Vector3 horizontal = new Vector3(4, 0, 0);
Vector3 vertical = new Vector3(0, 2, 0);
Vector3 original = new Vector3(0, 0, 0);
int l = width * height;
HitableList hitableList = new HitableList();
hitableList.list.Add(new Sphere(new Vector3(0, 0, -1), 0.5f, new Lambertian(new Color(0.8f, 0.3f, 0.3f))));
hitableList.list.Add(new Sphere(new Vector3(0, -100.5f, -1), 100f, new Lambertian(new Color(0.8f, 0.8f, 0.0f))));
hitableList.list.Add(new Sphere(new Vector3(1, 0, -1), 0.5f, new Metal(new Color(0.8f, 0.6f, 0.2f), 0f)));
hitableList.list.Add(new Sphere(new Vector3(-1, 0, -1), 0.5f, new Dielectirc(1.5f)));
Color[] colors = new Color[l];
SimpleCamera camera = new SimpleCamera(original, lowLeftCorner, horizontal, vertical);
float recip_width = 1f / width;
float recip_height = 1f / height;
for (int j = height - 1; j >= 0; j--)
{
for (int i = 0; i < width; i++)
{
Color color = new Color(0, 0, 0);
for (int s = 0; s < SAMPLE; s++)
{
Ray r = camera.CreateRay((i + _M.R()) * recip_width, (j + _M.R()) * recip_height);
color += GetColorForTestDielectric(r, hitableList, 0);
}
color *= SAMPLE_WEIGHT;
//为了使球体看起来更亮，改变gamma值
color = new Color(Mathf.Sqrt(color.r), Mathf.Sqrt(color.g), Mathf.Sqrt(color.b), 1f);
color.a = 1f;
colors[i + j * width] = color;
}
}
return(colors);
}