博客园-Ofenia's Dreamhttp://www.cnblogs.com/Jedimaster/ 投湖的少女 悲剧的足迹zh-cnSun, 11 May 2008 22:50:20 GMTSun, 11 May 2008 22:50:20 GMT60[Busy]关于近期http://www.cnblogs.com/Jedimaster/archive/2008/04/26/1171698.htmlOfenia's DreamOfenia's DreamFri, 25 Apr 2008 16:03:00 GMThttp://www.cnblogs.com/Jedimaster/archive/2008/04/26/1171698.htmlhttp://www.cnblogs.com/Jedimaster/comments/1171698.htmlhttp://www.cnblogs.com/Jedimaster/archive/2008/04/26/1171698.html#Feedback6http://www.cnblogs.com/Jedimaster/comments/commentRss/1171698.htmlhttp://www.cnblogs.com/Jedimaster/services/trackbacks/1171698.html

Ofenia's Dream 2008-04-26 00:03 发表评论
]]>[Little Case]Reconstruct Tangent From Point Cloudhttp://www.cnblogs.com/Jedimaster/archive/2008/04/09/1145769.htmlOfenia's DreamOfenia's DreamWed, 09 Apr 2008 13:59:00 GMThttp://www.cnblogs.com/Jedimaster/archive/2008/04/09/1145769.htmlhttp://www.cnblogs.com/Jedimaster/comments/1145769.htmlhttp://www.cnblogs.com/Jedimaster/archive/2008/04/09/1145769.html#Feedback0http://www.cnblogs.com/Jedimaster/comments/commentRss/1145769.htmlhttp://www.cnblogs.com/Jedimaster/services/trackbacks/1145769.html　　从事先bake好ST的点云中构造切线。说起来极其简单，自适应的根据点的数目生成一个类似于棋盘格的加速结构，随后在每个网格内部进行搜索。示意图如下，

Rect

　　因为标记为Best的那个样本最接近于vec2(1,0)，也就是保证了一个方向上的连续性，计算结果为当前采样点（五角星表示）的dPds。相同的道理，我们也可以得到dPdt。当然，我们也可以在RSL中手工计算这两个分量。

　　在我的笔记本上T2250＋2G的机器上跑了3秒，在E6550＋2G的台式机上跑了1秒，速度还是可以的。生成的图如下，注意为了显示已经把向量数值缩放。

Cloth.T

　　这样计算对ST分布有要求，就是不能颠倒物体方向，导致P不能在ST空间内连续，所以模型上肯定会有一块不会连续了。或者更加智能的，bake出ObjectID一样的玩意，这样就在物体的每个部分内独立计算切线了。



Ofenia's Dream 2008-04-09 21:59 发表评论
]]>[Nikon D80]樱花盛开的校园http://www.cnblogs.com/Jedimaster/archive/2008/03/20/1115440.htmlOfenia's DreamOfenia's DreamThu, 20 Mar 2008 14:19:00 GMThttp://www.cnblogs.com/Jedimaster/archive/2008/03/20/1115440.htmlhttp://www.cnblogs.com/Jedimaster/comments/1115440.htmlhttp://www.cnblogs.com/Jedimaster/archive/2008/03/20/1115440.html#Feedback2http://www.cnblogs.com/Jedimaster/comments/commentRss/1115440.htmlhttp://www.cnblogs.com/Jedimaster/services/trackbacks/1115440.html

 

 

 

 

花开花落，阳春三月，随身背着相机在学校里游走，不断的寻找视角。知道自己拍的不好，总觉得自己拍的片有各式各样的缺陷，也许这就是大师与学徒的区别吧。用好手头的装备，出好片，锻炼Visual Effect TD的内在素养，这才是学习的正道。君不见好莱坞那么多视觉TD都能拍的一手好片，所以，这些都是融合到人家的日常生活中去的，这也是受过艺术训练的专业人员与普通劳工的区别。



Ofenia's Dream 2008-03-20 22:19 发表评论
]]>[Nikon D80]适马微距http://www.cnblogs.com/Jedimaster/archive/2008/03/15/1107088.htmlOfenia's DreamOfenia's DreamSat, 15 Mar 2008 06:01:00 GMThttp://www.cnblogs.com/Jedimaster/archive/2008/03/15/1107088.htmlhttp://www.cnblogs.com/Jedimaster/comments/1107088.htmlhttp://www.cnblogs.com/Jedimaster/archive/2008/03/15/1107088.html#Feedback0http://www.cnblogs.com/Jedimaster/comments/commentRss/1107088.htmlhttp://www.cnblogs.com/Jedimaster/services/trackbacks/1107088.html

用同事的适马105/2.8微距拍的玩具，不得不承认，除了德系装备，“日本光学”的素质还是比其他的镜头要高一些的



Ofenia's Dream 2008-03-15 14:01 发表评论
]]>来本有趣的电子书——林产与木材科学导论http://www.cnblogs.com/Jedimaster/archive/2008/03/02/1088110.htmlOfenia's DreamOfenia's DreamSun, 02 Mar 2008 14:14:00 GMThttp://www.cnblogs.com/Jedimaster/archive/2008/03/02/1088110.htmlhttp://www.cnblogs.com/Jedimaster/comments/1088110.htmlhttp://www.cnblogs.com/Jedimaster/archive/2008/03/02/1088110.html#Feedback1http://www.cnblogs.com/Jedimaster/comments/commentRss/1088110.htmlhttp://www.cnblogs.com/Jedimaster/services/trackbacks/1088110.html
老师上课说啥，这是内部交流刊物，我当即表示嗤之以鼻，这些人的思想还停留在上古时代，根本不知道分享知识的意义与价值，还基本停留在科技官僚的时代。这里是下载地址，感兴趣的朋友可以没事研究一下，以后打家具弄装潢可就非常自信了，再也不会被那些居心不良的木材销售商家给忽悠了。


Ofenia's Dream 2008-03-02 22:14 发表评论
]]>Lafortune Paper In RenderManhttp://www.cnblogs.com/Jedimaster/archive/2008/02/28/1085374.htmlOfenia's DreamOfenia's DreamThu, 28 Feb 2008 12:48:00 GMThttp://www.cnblogs.com/Jedimaster/archive/2008/02/28/1085374.htmlhttp://www.cnblogs.com/Jedimaster/comments/1085374.htmlhttp://www.cnblogs.com/Jedimaster/archive/2008/02/28/1085374.html#Feedback0http://www.cnblogs.com/Jedimaster/comments/commentRss/1085374.htmlhttp://www.cnblogs.com/Jedimaster/services/trackbacks/1085374.html
左边是用内建matte材质，也就是Lambert，右边的就是Lafortune了，使用了2个lobe。右边的Fresnel效果更加的强烈。



Ofenia's Dream 2008-02-28 20:48 发表评论
]]>Lafortune Sphere From Cornell Universityhttp://www.cnblogs.com/Jedimaster/archive/2008/02/26/1081795.htmlOfenia's DreamOfenia's DreamTue, 26 Feb 2008 02:52:00 GMThttp://www.cnblogs.com/Jedimaster/archive/2008/02/26/1081795.htmlhttp://www.cnblogs.com/Jedimaster/comments/1081795.htmlhttp://www.cnblogs.com/Jedimaster/archive/2008/02/26/1081795.html#Feedback0http://www.cnblogs.com/Jedimaster/comments/commentRss/1081795.htmlhttp://www.cnblogs.com/Jedimaster/services/trackbacks/1081795.html

过一阵子准备尝试使用高级BRDF模型，如这个赫赫有名的Lafortune BRDF，调整参数极其的不直观 —— 27个系数形成的矩阵表示了材质各向同性与各向异性的特性。康奈尔的站点上提供的BMRT的RIB，可惜现在BMRT早已经被NVIDIA和法院“和谐”掉了，想要下载很麻烦。这是使用免费的3Delight渲染出的图，修改过一些Attribute。下面准备尝试使用康奈尔人做实验测量出来的BRDF数据渲染。


Ofenia's Dream 2008-02-26 10:52 发表评论
]]>K-Means Algorithmhttp://www.cnblogs.com/Jedimaster/archive/2008/02/21/1076153.htmlOfenia's DreamOfenia's DreamThu, 21 Feb 2008 02:50:00 GMThttp://www.cnblogs.com/Jedimaster/archive/2008/02/21/1076153.htmlhttp://www.cnblogs.com/Jedimaster/comments/1076153.htmlhttp://www.cnblogs.com/Jedimaster/archive/2008/02/21/1076153.html#Feedback2http://www.cnblogs.com/Jedimaster/comments/commentRss/1076153.htmlhttp://www.cnblogs.com/Jedimaster/services/trackbacks/1076153.htmlKMean.gif

K-Means算法是一种比较有意思的数据簇算法，原始的意义是将n个物体分为k个区域，并且k<n。当我看到这个算法第一个想法就是是不是和Voronoi图相关，事实上的确是的，两个簇边界上的点大体构成Voronoi图的剖分线段。这个算法广泛应用于分子生物学，以及CG —— 康奈尔的那帮家伙用这个算法加速间接照明部分的计算，很是强大。


Ofenia's Dream 2008-02-21 10:50 发表评论
]]>Render Blobbyhttp://www.cnblogs.com/Jedimaster/archive/2008/02/20/1074686.htmlOfenia's DreamOfenia's DreamWed, 20 Feb 2008 03:20:00 GMThttp://www.cnblogs.com/Jedimaster/archive/2008/02/20/1074686.htmlhttp://www.cnblogs.com/Jedimaster/comments/1074686.htmlhttp://www.cnblogs.com/Jedimaster/archive/2008/02/20/1074686.html#Feedback0http://www.cnblogs.com/Jedimaster/comments/commentRss/1074686.htmlhttp://www.cnblogs.com/Jedimaster/services/trackbacks/1074686.html

This is a very simple blobby scene rendered by 3Delight with the free licence in my laptap PC.
I will dive into several CFD papers from Stanford University, UC Berkeley and ILM, try to use blobby to handle the fluid effect.


Ofenia's Dream 2008-02-20 11:20 发表评论
]]>pbrt win32 compiled binary downloadhttp://www.cnblogs.com/Jedimaster/archive/2008/02/08/1066104.htmlOfenia's DreamOfenia's DreamFri, 08 Feb 2008 13:11:00 GMThttp://www.cnblogs.com/Jedimaster/archive/2008/02/08/1066104.htmlhttp://www.cnblogs.com/Jedimaster/comments/1066104.htmlhttp://www.cnblogs.com/Jedimaster/archive/2008/02/08/1066104.html#Feedback4http://www.cnblogs.com/Jedimaster/comments/commentRss/1066104.htmlhttp://www.cnblogs.com/Jedimaster/services/trackbacks/1066104.html

I hate to recompile opensource software, spent lots of time on configuation hell. Furthermore, we can not learn anything usefull except being more familiar with our IDE.

If the program shows that missing some dll such as OpenEXR or the others, please download them manually. My environment is not the same as yours, so I can't be sure that you can running this little program as free as me.

Download Here

Enjoy !



Ofenia's Dream 2008-02-08 21:11 发表评论
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