public ISkyBoxAble SkyBox; // = DefaultSkyBox.Default; // todo: 删除默认值
public RayCastResult Intersection(Ray ray)
{
RayCastResult result = null;
foreach (RenderObject o in r_Objects)
{
RayCastResult re = o.Intersection(ray, float.MaxValue);
result = RayCastResult.BetterOne(result, re);
}
return(result);
}
/// <summary>
/// 返回两个结果中更好的一个
/// </summary>
/// <param name="res1"></param>
/// <param name="res2"></param>
/// <returns></returns>
public static RayCastResult BetterOne(RayCastResult res1, RayCastResult res2)
{
if (res1 == null)
{
return(res2);
}
if (res2 == null)
{
return(res1);
}
if (res1.distance < res2.distance)
{
return(res1);
}
else
{
return(res2);
}
}
public RayCastResult Intersection(Ray ray, float nowbest)
{
(bool cast, float mint) = BoundBox.Intersection(ray);
if (!cast || mint > nowbest) // 未相交 或 当前最小解已不是最优
{
return(null);
}
RayCastResult result = null; // RayCastResult.BetterOne(lres, rres);
if (Childs != null)
{
foreach (IRayCastAble obj in Childs)
{
RayCastResult restmp = obj.Intersection(ray, nowbest);
result = RayCastResult.BetterOne(result, restmp);
if (result != null)
{
nowbest = Math.Min(nowbest, result.distance);
}
}
}
return(result);
}