public bool Hit(Ray ray, float t_min, float t_max, ref HitRecord record)
{
if (aabb != null && aabb.Hit(ray, t_min, t_max))
{
HitRecord temp1 = null;
HitRecord temp2 = null;
if (left_node != null && right_node != null)
{
bool hit_left = left_node.Hit(ray, t_min, t_max, ref temp1);
bool hit_right = right_node.Hit(ray, t_min, t_max, ref temp2);
if (hit_left && hit_right)
{
record = temp1.t < temp2.t ? temp1 : temp2;
return(true);
}
else if (hit_left)
{
record = temp1;
return(true);
}
else if (hit_right)
{
record = temp2;
return(true);
}
}
else if (left_node != null)
{
if (left_node.Hit(ray, t_min, t_max, ref record))
{
return(true);
}
}
else if (right_node != null)
{
if (right_node.Hit(ray, t_min, t_max, ref record))
{
return(true);
}
}
}
return(false);
}
public override bool Hit(Ray ray, float t_min, float t_max, ref HitRecord record)
{
throw new NotImplementedException();
}
public bool Hit(Ray ray, float t_min, float t_max, ref HitRecord record)
{
return(root.Hit(ray, t_min, t_max, ref record));
}
public virtual bool Refracted(Ray ray_in, HitRecord record, ref Ray refracted)
{
return(false);
}
public virtual Ray GetScatteredRay(Ray ray_in, HitRecord record)
{
throw new NotImplementedException();
}
/// <summary>
///
/// </summary>
/// <param name="light">光源</param>
/// <param name="view_ray">视线</param>
/// <param name="record">相交信息</param>
/// <param name="depth">渲染深度</param>
/// <returns></returns>
public virtual Vec3 GetColor(BaseLight light, Ray view_ray, HitRecord record, float depth)
{
throw new NotImplementedException();
}
///懒得注释了,折射公式推一推就有了
public override bool Refracted(Ray ray_in, HitRecord record, ref Ray refracted)
{
Vec3 outward_normal;
float ni_over_nt;
# region 判断从空气到介质还是介质到空气.此外这里折射计算可能有误,参考的ray tracing in one weekend,等以后看看其他书籍比较一下
public override Ray GetScatteredRay(Ray ray_in, HitRecord record)
{
//漫反射
//取单位法向量 + 单位半径球上任意一点(可以理解为法向量的endpoint出发，指向球面任意一点)
return(new Ray(record.hit_point, record.normal + utils.GenerateRandomVector(1f), ray_in.DeltaTime));
}
