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Brazen

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About Brazen

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    J-B G.
  1. Galaxy

    Just came across a website of a vfx artist, name's Teun van Der Zalm. He creates beautiful nebulae inside Houdini, check it out, it's very inspirational : https://vimeo.com/teunvanderzalm
  2. Big thanks to all, your solutions are quite impressive for the beginner that I am. I will analyse the file to understand exactly what you were saying guys. I have quite a lot to learn, and your insights are very appreciated. Yet another effect done by the masters of OdForce Thank you again !
  3. Still no answer. As someone suggested to me here at OdForce, maybe my problem is too vague, which is why I would like to expose my problem more clearly. The problem I am trying to solve is how to perform an animation of the different iteration of a recursive subdivisions of any geometric shape. For instance, I have attached a hip file of a platonic mesh subdivided with the technique found in the tutorial of Entagma. In the hip file, you can see that between frames 21 and 26, I have different iterations of the recursive subdivisions. So my question is : how to perform a smooth animation between those different shapes, like in the first video I have post in the previous message ? I tried to document myself on the different blend shapes nodes available in Houdini but it seems that the two shapes we want to blend must have the same topology that is to say the same number of points and faces... But I can't figure how to use these nodes as two different shapes corresponding of two iterations of the recursive subdivisions algorithm have not the same topology (because triangles are created). In this thread : http://forums.odforce.net/topic/28161-triangle-polygon-morph-animation-to-fractal/?tab=comments#comment-160368, the user Bergermon posted a file which seems to give an example of such blending, but I don't manage to merge the two technique to create the animation. Can someone help please ? Thank you by advance. EDIT : I have just found this tutorial which shows a technique to morph any shape into another : https://www.youtube.com/watch?v=-ycX38_DV7E. I have just tried to do it between two shapes of two iterations of the algorithm => my computer have crashed... Well I have just a laptop, not the kind of stuff to make VFX... I will start again later. Subdiv_Test.hipnc
  4. Hello everybody, I’m relatively new to Houdini, and as part of a personal project (a short film), I’m currently trying to reproduce an effect based on the recursive subdivision of a surface. We can observe the said effect for instance on this video made by Simon Holmedal : https://www.instagram.com/p/BK8ivNajNdu/ The different iteration (non animated) of the algorithm can be also observed on this video : https://www.youtube.com/watch?v=HHKPdf67Sfo Or on this one : https://www.youtube.com/watch?v=K1mlO2YSfU4 It is also the same effect used in the official SideFx Ident (Simon Holmedal again): https://vimeo.com/164501803 I searched every topic on OdForce which seemed to deal with this technique, I found several topic like : • http://forums.odforce.net/topic/28803-this-subdivided-thing/ • http://forums.odforce.net/topic/28161-triangle-polygon-morph-animation-to-fractal/?tab=comments#comment-160368 • http://forums.odforce.net/topic/26779-how-to-creat-subdivision-pattern/?tab=comments#comment-154625 And also the famous tutorial by Entagma regarding subdivisions : • http://www.entagma.com/loops-subdivisions/ Those topics seem to give several techniques to subdivide a surface into smaller triangle, but none of them propose a solution to actually animate the subdivided mesh. It seems that the overall technique is based on a recursive subdivision, coupled with the fact that the subdivided parts move along their normal, in order to give this effect of extrusion and fractal. I’ve also searched more deeply into the code of such an algorithm, and I’ve found several websites (with code) explaining this effect: • http://code.algorithmicdesign.net/Recursive-Subdivision-Mesh • http://atlv.org/education/ghpython/#7 • http://www.geneatcg.com/2014/11/21/rhino-python-tessellation-subdivision-first-version/ • http://www.geneatcg.com/2014/11/28/rhino-python-mesh-boy-surface-subdivision-analysis/ There are also other websites (less significant) dealing with this issue: • https://codequotidien.wordpress.com/2011/07/18/half-edge-mesh/ • http://www.wblut.com/he_mesh/ • https://codepen.io/anon/pen/YEyYZv • https://wewanttolearn.wordpress.com/tag/mesh-recursive-subdivision/ That’s all I found regarding this effect. Does anyone know how to make this kind of animation? If so, could anyone post a Houdini file which implements this technique so I could learn from that ? Thanks by advance, I hope someone here will know how to resolve this issue !
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