Ray Cinti

游戏中经常会有鼠标移动到某个对象上来拾取它的功能,我们可以用Unity3D中的射线Ray实现这一效果.原理是在我们鼠标的位置,从屏幕射出一条射向世界空间的射线,当这条射线碰撞到我们需要拾取的对象时,我们就销毁对象,把它添加到我们的背包中. 我们来做一个简单的Demo,我们在场景中添加一个方块Cube,一个小球Sphere,当我们鼠标放在方块上时没有任何反应,而当我们把鼠标放在小球上时,小球会消失. 新建一个项目,我们命名为"RayTest",然后在场景中新建一个小球,方块,和添加灯光,

射线的机制相当于碰撞; 创建射线: 1 Ray ray=new Ray(); origin : 射线发射的原点; direction: 射线发射的方向; distance: 射线的长度; hitInfo: 如果返回true,hitInfo将包含碰撞器碰撞的更多信息; Layer: gameObject的层; LayerMask: 只选定LayerMask层内的碰撞器,其他层内碰撞器忽略;返回bool类型,当射线与任何碰撞器碰撞时为真,反之为假; 射线碰撞的应用: 使用Physics类方法Rayc

Final gathering 依赖于在finalgather点周围进行差值,以度量入射间接光照的光强.如果没有足够多的临近点,mental ray将自动增加一些.如果摄像机发生移动,这些临近点将加载不同的位置.如果部分场景很暗,或者照明的对比度较大,那么finalgather点的光照变化率就很高,这就可能导致画面闪烁. 加大accuracy的光线数量或者半径通常可以解决这个问题,这是由于光线的数量的增加而牺牲一些性能为代价的.还可以在finalgather only 模式下先运行动画,记录一个

It's year 2465, and you are the Chief Engineer for Glorified Lumberjacks Inc. on planet Trie. There is a number of trees that you need to cut down, and the only weapon you have is a high-powered antimatter ray that will cut through trees like butter.

accel. avg size 3.14accel. avg depth 16.15accel. max size 8accel. max depth 20accel. GPIT 3.00 MB trav. steps / ray 15.34isects / ray 10.13rps 174892.54 accel. avg size 3.16accel. avg depth 14.35accel. max size 16accel. max depth 56accel. GPIT 164.89

Ray Camera.main.ScreenPointToRay(Vector3 pos)   返回一条射线Ray从摄像机到屏幕指定一个点 Ray Camera.main.ViewportPointToRay(Vector3 pos)  返回一条射线Ray从摄像机到视口(视口之外无效)指定一个点 RaycastHit 光线投射碰撞信息 bool Physics.Raycast(Vector3 origin, Vector3 direction, float distance, int layer

题目链接:uva 1400 - "Ray, Pass me the dishes!" 题目大意:给定一个长度为n个整数序列,对m次询问作出回答,对于每次询问(a,b),找到两个下标x,y使得x到y的连续和为区间a,b中最大的连续和,如果存在多解优先x小,然后y小. 解题思路:线段树,对于每个节点维护三个线段值: max_sub:区间连续最大和 max_prefix:区间连续前缀最大和 max_suffix:区间连续后缀最大和 建树的过程维护三个值,查询时只需考虑左右子节点的max_su

C. Ray Tracing There are k sensors located in the rectangular room of size n × m meters. The i-th sensor is located at point (xi, yi). All sensors are located at distinct points strictly inside the rectangle. Opposite corners of the room are located

Description After doing Ray a great favor to collect sticks for Ray, Poor Neal becomes very hungry. In return for Neal's help, Ray makes a great dinner for Neal. When it is time for dinner, Ray arranges all the dishes he makes in a single line (actua