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Developers often think of themselves as the only sane person in the room. This, as you may know, is also a trait of the clinically insane.Left unchecked, certain developer personality types can sink your project -- or, worse, make themselves no fun to work with. In my long and storied career, I' 阅读全文
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rand(1) returns one pseudo random number between 0 and 1 correct? (I don't know matlab myself but I know what you can do with the random number)Use the Box-Muller transform.This transform says isU1andU2are two independent uniform random variables on 0, 1, i.e., Ui ~ U(0,1), thenz1 = sqrt(-2 * lo 阅读全文
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Here is a list of links and references used when building theVRayFastSSS2material.[1] H. C. Hege, T. Hollerer, and D. Stalling,Volume Rendering: Mathematical Models and Algorithmic aspectsAn online version can be found athttp://www.cs.ucsb.edu/~holl/publications.htmlDefines the basic quantities invo 阅读全文
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http://www.creativecrash.com/forums/renderman-renderers-and-plug-ins/topics/shave-sdk-postedhttp://www.joealter.com/zips/SHAVESDK.zip 阅读全文
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* Tracing rays is fast, shading is slow* normalize is slow and should be avoided as much as possible* C is not faster than C++, correct use of C++ features can improve performance* SSE is not always faster, should be used without load and store from FPU* Taking branch is slower, computation is faste 阅读全文
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trace depth rays per second per core 6 220000 5 230000 4 250000 3 270000 2 310000why rays per second per core is dropping so fast with trace depth? 阅读全文
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Chaos Group:http://www.indeed.com/cmp/Chaos-Group-LLCRevenue: $17.5 MillionEmployees: 51-200mental images:http://we.pcinlife.com/thread-887111-1-1.htmlRevenue (quarter, 2008): less than $1 MillionAcquisition: $70 Million, see http://www.123jump.com/earnings-calls/NVIDIA-Fourth-Quarter-Earnings-Call/ 阅读全文
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今天在AU没通过Autodesk 3ds Max初级认证，可耻的失败了。。。。 阅读全文
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In ray tracing with BVH, one can typically use either distance-based sorting or axis-based sorting for determining the traversal order of child nodes.I tested both methods, it's observed that axis-based sorting is slightly faster than distance-based sorting, interesting. We only compare the numb 阅读全文
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I always assume that 'static const' is faster than 'const', while it's actually not the case.From the assembly code generated by VS 2008, 'static const' will generate a dynamic branch to make sure the variable is only initialized once. However, 'const' will genera 阅读全文
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