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Found 7 results

  1. My wire simulation issue...

    Hello; I have some lines in my simple " Wire " DOP, and I want them to act as soft elastic tubes. I don't know why they bend up, instead of bending down! So, how can I fix this? Thanks for helping. WireLines_01.hip
  2. Hi, As the title says, how, mathematically speaking, can I set points on a curve based on its curvature? What do I need to learn to do this? Trigonometry and derivatives? Thank you
  3. Hey all, I'm using houdini 15.5 and I'm trying to expose edges (in a manner similar to vray curvature/ inverted ao- https://docs.chaosgroup.com/download/attachments/12085592/VRayCurvatureHero.png?version=4&modificationDate=1487005362000&api=v2), the manual says "If the negated normal is connected, will find exposed edges. @parameters" so I took global variables, took the P plugged it into the P, took the N and added negate node (also I tried multiply constant with -1 instead) and plugged it into nN, the bias direction is 0, 0, 0, and still all I'm seeing is occlusion dirt, same as with default settings. I know that there's a 'curvature' VOP, but it yields some weird results for me, so I would like to try the dirt instead and see if it's different, so please help:)
  4. Hey everyone! Here's a demo of some point cloud tools I created to calculate concave and convex curvature as well as gradient and curl direction, also sharpening. Forgot to mention in the demo that the curvature calculation is a great way to do differential growth by advection along normal * curve * noise * parm. Also, the curl calculation can be used to make grass patches and groom fur by orienting curves along the direction to add swirly variance. There's a lot of ways these tools can be handy, interested to see what you all come up with! Let me know if you have any questions, enjoy! curveGradientCurlSharpen_v002.hipnc
  5. Hi Guys, After painting a lot of edge scuffs/rust/drips in I was fed up with the tedious labor of doing everything by hand. Especially when the stuff you do is almost always the same 'trick'. Is it possible to recreate something like this in vops? http://www.artonbit.com/cinema4d-corner/cine-tools/item/45-surface-curvature-shader This is btw the closest I could get in my search: http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&t=13855&postdays=0&postorder=asc&start=25 Thanks in advanced guys!
  6. please guys i have two vectors for point and i wanna know how to compute the curvature from it in vopsop what math method i should use guys
  7. Hi, I was trying to use the measure sop and the curvature mode to filter the flat part of my object and emit only from curved area but I didn't find very successul, does anyone know any other way to filter those areas ? Thanks ! Chistof