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Old 05-05-2011, 05:45 AM   #1
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Correction: A previous version of this story incorrectly reported the contents of a letter from the Justice Department to the NCAA about the Bowl Championship Series. The Justice Department has not announced an antitrust inquiry into the BCS. The letter asked for information about the BCS system to help determine if an inquiry should be launched. Also, the alert should have said the BCS system makes it more difficult for some athletic conferences to qualify for major bowl games, but it does not exclude them.

(CNN) -- In a letter to the NCAA disclosed Wednesday, the Justice Department said it has received several requests for an antitrust investigation into the current Bowl Championship Series system, and it wants information to help it decide what to do.

That controversial system makes it very difficult for teams in some athletic conferences to qualify for major bowl games, potentially costing millions of dollars in revenue to those not chosen.

"Serious questions continue to arise suggesting that the current BCS system may not be conducted consistent with the competition principles expressed in federal antitrust laws," Assistant Attorney General Christine Varney told NCAA President Mark Emmert.

The decision to release the letter came hours after Sen. Orrin Hatch, R-Utah, a major opponent of the current system, demanded further consideration of the issue in a face-to-face appearance with Attorney General Eric Holder at a Senate Judiciary Committee hearing.

Holder responded by disclosing the Justice Department had sent a letter to the NCAA on the issue Tuesday.

In her letter, Varney asked Emmert to explain why college football does not have a playoff when so many other college sports do. She also asked what steps,vibram fivefingers kso trek multisport shoes, if any, the NCAA has taken to create a playoff, and whether the NCAA has determined that there are aspects of the BCS system that do not serve interests of fans, colleges, universities, and players.

Officials acknowledge the NCAA is not legally required to respond,vibram foot gloves, although lawyers following the case expect the association to do so.

Antitrust lawyers have been watching the debate grow for more than two years, to see whether the Justice Department will jump into the case.

One antitrust expert who declares himself neutral in the case says he doubts Justice will launch a probe because it has a full plate of more pressing issues.

"There is a problem, but not an antitrust problem," said Gordon Schnell of the New York firm Constantine Cannon. A court could never require a football playoff,city sports vibram, but they could break up the current BCS system,vibram online, he said.

Currently, the BCS system limits automatic bids to the winners of the Big Ten, Big East, Big 12, Atlantic Coast Conference, Pac 10 and the Southeast Conference, thereby leaving out other conferences, including almost all schools in the Rocky Mountain Region. Only two remaining at-large spots are available to all other colleges and universities.
CNN's Terry Frieden contributed to this report
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Old 05-05-2011, 05:52 AM   #2
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本例介绍室内空间夜景布光的方法,主要讲解了灯光阵列和VR渲染,希望能给朋友们带来帮助。
最近发现有些朋友问室内空间怎么布光,俺特意做了这个教程,希望对大家有帮助。
咱们先看效果:
因为这个教程主要讲解布光,在材质方面就偷了懒,希望大家不要介意。
OK,在作图之前,咱们先分析分析这个场景。我们都知道。一个空间,明暗一定要分明。就像素描画一个球体, 有高光、有中间调、有暗部才好看。如果整个球体都是一个调子,那感觉就非常平,立不起来。室内空间也一样, 很多朋友渲出来的图感觉很平就是因为没有注意明暗。另外就是关于色调方面了,christian louboutin shoes,在一般情况下,一个被色光照设的物体,其暗部总是趋向于这个色光的补色,常见的补色是红绿、橙蓝、黄紫。 在这个场景中,我将台灯照射的光做为亮点。 因为是夜晚,整体便以橙黄色调为主。
每次布光前我都会先将占面积大的物体贴好材质,cheap christian louboutin,因为材质会反弹光线,而反弹光线的颜色是依材质的颜色而改变的。注意仅仅是贴材质,其他参数一律不调,调 了影响速度。
先调测试级渲染参数
使用VR渲染
关闭默认灯光,red sole shoes,不渲染模糊效果,VR里模糊是非常影响速度的
另外的一种方法是选固定,两者差别不大,我更喜欢用自适应
因为是用灯阵模拟反弹光线,一次反弹和次级反弹就不用太高了
我的电脑是单核的,如果是双核的就用2
图1 控制背景颜色的同时还起到光照效果的作用,如果我们只需要他们的背景颜色,不要光照效果怎么办 ?
这个时候就需要图2了,当图2激活时,图1的光照效果就会被图2所代替,只起到背景颜色的作用
接下来就是布光了
首先我在窗口打上两个面光,用于模拟窗外的月光,christian louboutin pumps
参数
提醒下大家,教程中不是一遍就能完成的,而是一遍一遍的尝试出来的
不知道大家对参数怎么个看法,但在我初学VR时就认为会用一套完整的参数供我使用。我记得火星论坛上有个人 说过:“我们需要得是什麽?是尝试?还是公式?是思路?还是参数?”
诚然,多看教程是有好处,但千万不要依赖教程,christian louboutin sale,教程毕竟是别人的东西,学到得只是公式和参数,我们要多尝试,只有尝试,才能在在脑袋种形成 自己的思路, 那才是自己的东西,别人想拿也拿不了
看下效果
作图时要多尝试调参数,没有最好的效果,只有更好的效果

接下来就是台灯部分了
台灯我用球形灯和聚光灯结合使用
参数
效果
因为一次反弹和次级反弹参数偏低,造成台灯光照的距离不够远
这个时候就要使用灯阵了
看效果
咋样? 好多了吧,冷暖对比的感觉咋样?
因为整个场景不可能只有一个台灯,louboutin shoes,所以需要用灯阵来模拟别的灯光照亮场景的效果
看效果~!

不出光子了
最终效果:
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