len3d

摘要： 1. Distribute photons more evenly, which means each photon carries approximately the same power.2. Use disc(ellipsoid) instead of sphere to locate nearest photons, to reduce false photons in corners.3. Use differential checking to stop adding photons when the estimate is either constantly increasing 阅读全文

摘要： http://www.fxguide.com/featured/the-art-of-rendering/Really classic. my favorite for coffee time:) 阅读全文

摘要： 我是在上海南京西路的美国大使馆面试的。预约的是早上7点15的面试，大约6点20到达梅陇镇广场西侧的入口处排队。因为我面试的是有美国商会担保的商务签证，所以要排一个特殊的队伍，到场咨询保安就知道了。我到的时候排到了大概第五名的位置。排队之前要先到旁边的戏院里面寄存包，电子的东西都不能带，手机也要寄存的，这个也是问保安就知道了。面试之前要过安检，进门只能带材料和钱包，建议不要系皮带，安检的时候要脱下来，很麻烦。然后会在一号窗口领之前由美国商会递交的个人材料，再到二号窗口留十指指纹。留十指指纹的时候手不能太干，否则采集不出来，建议自己提前涂点护手霜。之后就到窗口和面试官面谈，就和银行的窗口一样，大约 阅读全文

摘要： * Distribute tasks in a round-robin fashion.* Required APIs:void task::spawn_root_and_wait(taks&);void task::spawn(task&);void task::spawn_and_wait_for_all(task&);Depth-first execution: * Strike when the cache is hot. The deepest tasks are the most recently created tasks, and therefore a 阅读全文

摘要： UDP Multicast example:http://ntrg.cs.tcd.ie/undergrad/4ba2/multicast/antony/example.htmlHow to multicast over TCP/IPhttp://www.ibiblio.org/pub/linux/docs/howto/other-formats/html_single/Multicast-HOWTO.htmlLinux Socket Multicasthttp://www.tenouk.com/Module41c.html 阅读全文

摘要： 在VS里面选择：Tools > Import and Export Settings… > Reset all settings删掉当前设置！本人亲自尝试过，立刻变得飞快！ 阅读全文

摘要： Assume a parametric curve can be denoted by P(t), any attribute T can be interpolated linearly with:T = (1 - t) * T0 + t * T1 (1)T0 is the attribute at t=0, and T1 is the attribute at t=1.Differentiate equation (1) we have:dTdx = (T1 - T0) * dtdx (2)Now the problem turns into how to compute dtdx.Usi 阅读全文

摘要： MC:QMC:RQMC:Convergence speed:QMC > RQMC > MCSampling patterns:QMC > RQMC > MCSo RQMC is the balance between MC and QMC. 阅读全文

摘要： http://cgg.mff.cuni.cz/~jaroslav/papers/2008-irradiance_caching_class/05-jk-implementation_details.pdf 阅读全文

摘要： // at process start call init_pthread_suspending to install the handlers// to suspend a thread use pthread_kill(thread_id, SUSPEND_SIG)// to resume a thread use pthread_kill(thread_id, RESUME_SIG)#include <signal.h>#define RESUME_SIG SIGUSR2#define SUSPEND_SIG SIGUSR1static sigset_t wait_mask; 阅读全文