particular怎么让粒子随机旋转
exhibitionhall是什么意思？
exhibitionhall是什么意思？
exhibition hall[英][eksibin h:l][美][ksbn hl]展览馆; 例句:
is an exhibition hall, a revolving restaurant and rooftop swimming pools and gardens. 楼内还有展厅，旋转餐厅，在顶层还有游泳池和花园。
of these new buildings have stirred their share of controversy, unmentioned in the exhibition hall-mr. koolhaass building in particular. 这些新建筑物有些引起了不少的争议，规划展览馆对此没有提及尤其是库哈斯先生设计的央视大楼。
ae粒子在地面不反弹怎么解决？
Particular层不要打开图层3D;Emitter Type（发射类型）改为Box;把Direction(发射方向)改为Directional（定向发射）;把X Rotation（X轴旋转）改为-90;设置Particle Life[sec]长一些，不至于，没有落到地面层就消失了，为了便于测试可以把Emission Extras（发射附加）中的Pre Run（预运行）改为100，让例子在第一帧就已经发射很多。
用来反弹的地面层打开3D，X轴旋转到90度，Particular中在Physics（物理特性）中，Physics Mpdell（物理模式）从Air（空气动力学）改为Bounce（碰撞），在Bounce栏里拾取你的地面层为Floor Layer。
这样设置应该可以看到粒子碰撞地面层后反弹了。
round的用法及意思，（英语）？
round 美: [ra?nd] 英: [ra?nd] n.旋转；巡视；一连串；绕圈 adv.环绕；附近；各处；向四面 prep.环绕；在…周围；始终 v.绕过；拐过；使成圆形；把…四舍五入 adj.圆的；球形的；肥胖的；弧形的
1 圆形的；环形的；球形的shaped like a circle or a ball a round plate圆盘子 These glasses suit people with round faces. 这款眼镜适合圆脸的人。 The fruit are small and round. 这种水果小而圆。 Rugby isnt played with a round ball. 橄榄球比赛用的不是圆球。 the discovery that the world is round 地球是圆的这一发现 The child was watching it all with big round eyes( showing interest) . 这孩子睁着又大又圆的眼睛看着这一切。 a T-shirt with a round neck 圆领T恤衫
2 弧形的；圆弧的having a curved shape the round green hills of Donegal 多尼戈尔那些圆圆的绿山冈 round brackets( in writing) 圆括号 She had a small mouth and round pink cheeks. 她的嘴小小的，圆脸蛋红红的。
3 [obn]整数的；尾数是0（或5）的a figure or amount is one that is given as a whole number, usually one ending in 0 or 5 1 旋转；环绕；兜圈子moving in a circle Everybody joins hands and dances round. 大家手拉着手，围成一圈跳舞。 How do you make the wheels go round? 你是怎么让轮子转起来的？ The children were spinning round and round . 孩子们一个劲地转呀转。 The thought kept going round and round in her head. 这个想法一直萦绕在她的心头。 2 周长；周围；绕一整圈measuring or marking the edge or outside of sth a young tree measuring only 18 inches round 周长只有18英寸的小树 Theyve built a high fence all round to keep intruders out. 他们在周围竖起了高高的围墙，以防外人进入。 3 在周围；围绕on all sides of sb/sth A large crowd had gathered round to watch. 一大群人聚在周围观看。
4 到处；四处at various places in an area People stood round waiting for something to happen. 人们在各处站着，等待着发生什么事情。
5 调转方向；转过来in a circle or curve to face another way or the opposite way He turned the car round and drove back again. 他调转车头，又开了回来。 She looked round at the sound of his voice. 听到他的声音，她扭头看了看。
6 绕弯；迂回；向另一侧to the other side of sth We walked round to the back of the house. 我们绕到房子的后面。 The roads blocked─youll have to drive the long way round . 这条路被堵了—你们得开车绕着走了。
7 依次；挨个from one place, person, etc. to another Theyve moved all the furniture round. 他们把所有的家具搬动了一遍。 He went round interviewing people about local traditions. 他到处找人访谈，了解当地的传统。 Pass the biscuits round. 把饼干传给大家。 Have we enough cups to go round ? 我们的杯子够大家用吗？
8 到某地，在某地（尤指居住地）to or at a particular place, especially where sb lives 1 环绕；围绕in a circle the first woman to sail round the world 第一位环球航行的女性 The earth moves round the sun. 地球围绕太阳旋转。 2 绕过；在另一侧on, to or from the other side of sth Our house is round the next bend. 前面一拐弯就是我们家。 There she is, coming round the corner. 她来了，绕过拐角过来了。 There must be a way round the problem. 这个问题一定有办法解决。 3 在…周围