Color GetColorForTestDefocus(Ray ray, HitableList hitableList, int depth)
{
HitRecord record = new HitRecord();
if (hitableList.Hit(ray, 0.0001f, float.MaxValue, ref record))
{
Ray r = new Ray(Vector3.zero, Vector3.zero);
Color attenuation = Color.black;
if (depth < MAX_SCATTER_TIME && record.material.scatter(ray, record, ref attenuation, ref r))
{
Color c = GetColorForTestDefocus(r, hitableList, depth + 1);
return(new Color(c.r * attenuation.r, c.g * attenuation.g, c.b * attenuation.b));
}
else
{
//假设已经反射了太多次，或者压根就没有发生反射，那么就认为黑了
return(Color.black);
}
}
float t = 0.5f * ray.normalDirection.y + 1f;
return((1 - t) * new Color(1, 1, 1) + t * new Color(0.5f, 0.7f, 1f));
}
/// <summary> /// 材质表面发生的光线变化过程 /// </summary> /// <param name="rayIn"></param> /// <param name="record"></param> /// <param name="attenuation"></param> /// <param name="scattered"></param> /// <returns>是否发生了光线变化</returns> public abstract bool scatter(Ray rayIn, HitRecord record, ref Color attenuation, ref Ray scattered);
public abstract bool Hit(Ray ray, float t_min, float t_max, ref HitRecord rec);