我看 Upright Orientation of Man-Made Objects

Siggraph 2008 的一篇論文:[Upright Orientation of Man-Made Objects](http://www.cs.ubc.ca/nest/imager/tr/2008/upright_orientation/ )。這篇論文的目的是要把 3D 模型給擺正。只要你隨意給一個 3D 模型,使用這篇論文裏的方法的話,就能把一個模型擺正到可以平放在桌面上來。(註:其實是人造的物件為主,如果你是給一隻兩隻站立的狗的話,不曉得會跑出什麼結果來~) ...

October 11, 2011 · 1 分鐘 · Drake Guan

Pixar 用動畫來教你 RenderMan 是怎麼運作的

今年的 Stupid RenderMan/RAT Tricks 2011,Pixar 的 Patrick Coleman 給了一個簡短的 trick: Illustrating RenderMan for the Masses 。整個 talk 的目的圍繞在一個主題上: 跟你的奶奶解釋 RenderMan 是怎麼協助電影動畫的。 上頭這個副標不錯吧,也很難吧。事實上,你把上頭的 RenderMan 換成任何一個你熟悉的技術或東西,都一樣困難。試試換成 mp3、電子書、網際網路、Facebook、iPad、App…以我自己來看的話,我想 mp3 是最容易解釋的一點 XD ...

October 3, 2011 · 1 分鐘 · Drake Guan

Renderings 101 for videogames

I found this slides accidentally and it reads fluently and describes renderings clearly. If I had to give a course of semester about rendering, I might borrow this slides and address it in the 1st or 2nd hour of the course. It should be a good test to make participants to decide to enroll this course or not asap. (videogame) Rendering 101

October 2, 2011 · 1 分鐘 · Drake Guan

Summary of SIGGRAPH 2011 in Prezi

My personal viewpoints of SIGGRAPH 2011 after lots of discussion with friends, colleagues, and someone. It is very subjective and the presentation on Prezi is just a testing. The presentation is not completed yet but I think it’s enough to leave it in this way. Check the source presentation: Summary of SIGGRAPH 2011 on Prezi

August 31, 2011 · 1 分鐘 · Drake Guan

Summary of SIGGRAPH 2011

More and more research papers focusing on controllable or guidable topics are proposed, like ShadowDraw , NPR Noise , Example-Based Elastic Materials , Photo-Inspired Modeling , Assembly-Based 3D Modeling . Alembic 1.0 is proposed to supersede long-running OBJ and work successfully in this industry, just like OpenEXR for images. Open source might not be the right way, but joint development is the way! Deep image compositing(1 , 2 , 3 ) is hot. Weta developed and used it for Avatar on Pixar’s Renderman and The Foundry’s Nuke is going to support that. Furthermore, deep image format is included in the standardization of OpenEXR 2.0. Katana is going to be release in this year, which is a 3D application specifically designed for the needs of look development and lighting in an asset based pipeline. The course: Stereoscopy from XY to Z is awesome and really informative. ( slides by NVIDIA , brief on real-time rendering ) Global illumination by ray tracing is the trend but volumetric rendering is the next! Shrink Wrapping, low-res and distant cars in Cars 2 are modelled by a simple cube with displacement shaders. Not a new idea but it still looks cool. When we talk about 3-D, the stereoscopic vision, people are still mentioning the min/max disparity/parallax issues, like some safe zone, the bearable disparity angles, and the min/max stuff. Even Disney puts ‘comfortable’ as the top of stereoscopic principles. But, Disney also starts to mention emotional stereo and emotional distance. Current volumetric renderers still base on ray tracer or REYES. Blue Sky thinks crowd simulation takes time, slower loading and easy to crash your memory-limited machines, it is better to just bake variety of animations and use that to synthesize plausible crowd animation. Well, that is all because Blue Sky is using proprietary ray-tracing renderer! But in some situation, it makes sense. Sparse Voxel Octree (SVO)(google code: Efficient Sparse Voxel Octrees ) is the key to LoD. CG is about cheating and we all should know that in advance.

August 26, 2011 · 2 分鐘 · Drake Guan

SIGGRAPH 辦在哪的差別

今年的 SIGGRAPH 辦在加拿大 ,說什麼也要來一趟,見識一下所謂的「好山好水好無聊的溫哥華」,順道拜訪一下老朋友 仁瑋 賢伉儷。除了看看美侖美幻、有海景與海鷗相伴的 Vancouver Convention Centre 之外,也想感受一下溫哥華市區的生活步調。只能說,這個城市的人較台北人來得節奏快一些,但同時也來得懂得享受生活。一小塊草皮、藍天白雲與溫柔的陽光,就是一個可以讓人放鬆的大自然氛圍。(我與同事,趁著一個午休時間,拎著一個便當,走了幾個 block,跑去參加了一場 Musical Nooners 的戶外音樂會。聽聽音樂,看看小朋友在草地上奔跑,精神整個都來了~) ...

August 26, 2011 · 2 分鐘 · Drake Guan

about.me -- 個人線上名片的時代

如果說,LinkedIn 是個人的線上履歷,那邊 about.me 就是個人的線上名片了。 about.me 網站上,有很多設計得很好看且很有意思的個人名片 ,當我無聊時,會上去晃晃,看看這個資訊大爆炸,每個人看著這些名人 ,然後想像自己有天也跟著平步青雲的模樣。然後有天 about.me 就出現了,後來它甚至讓你可以非常容易地把線上名片實體化 。 ...

August 24, 2011 · 1 分鐘 · Drake Guan

Pixar Renderman on Cloud?

Just someone did that test, lol~

August 22, 2011 · 1 分鐘 · Drake Guan