Noobini Posted May 23, 2017 Share Posted May 23, 2017 Not as polished as the pros...but I share what I can...there's probably a lot that can be automated but I'm not too proficient with coding yet.https://1drv.ms/u/s!AvgNse7E8aaygmHW_PWAPrMBYqWv 2 Quote Link to comment Share on other sites More sharing options...
Atom Posted May 23, 2017 Share Posted May 23, 2017 (edited) Nice work, thanks for sharing the setup too! Tyre_Tread_1.04.zip Edited June 2, 2017 by Atom Quote Link to comment Share on other sites More sharing options...
Noobini Posted May 24, 2017 Author Share Posted May 24, 2017 ver 1.01: - no more Capture Length, complete circle is now auto - Rep Count/Gap -> auto circle - auto copy offset according to bbox for different patterns Still not good with coding so exploited the new Point (Attrib Expression) instead. Tyre_Tread_1.01.zip Quote Link to comment Share on other sites More sharing options...
McNistor Posted May 24, 2017 Share Posted May 24, 2017 (edited) Very nice! Stellar example of how procedural modeling would be used in conjunction with traditional modeling because of course, it would be optimal, for texturing/animation purposes, that the treads themselves be modeled by hand with nice topology. Your setup is well suited for that too so again, great work! p.s. In the future, be sure to put a relative path $hip/ for the external files, for convenience. Edited May 24, 2017 by McNistor Quote Link to comment Share on other sites More sharing options...
Noobini Posted May 24, 2017 Author Share Posted May 24, 2017 Dang...I thought I did !!!...Yes will double check relative path next time.... Yeah I don't see why a custom built pattern wouldn't work...eg...draw your own curves (just like floor tiles)...so that's on my to do list and also how to make it work with a continuous strip...ie. i'll have to 'clip' top/bottom then fuse the repeating patterns together Quote Link to comment Share on other sites More sharing options...
acey195 Posted May 24, 2017 Share Posted May 24, 2017 nice work! like the blending of the profile as well personally I would choose for controlling: the radius(or diameter) of the tire and then set the amount of segments; which then calculates the gap. rather than what you have now, controlling: the length of the segments, the gap; which then calculates the radius of the tire. That way you can switch out patterns and still have them fit on the same wheel/vehicle. Quote Link to comment Share on other sites More sharing options...
Noobini Posted May 24, 2017 Author Share Posted May 24, 2017 yes..been thinking about Radius as the 'controller' too...since you're much more likely to have to model treads to fit a wheel of certain fixed size = radius... another one on to do list Quote Link to comment Share on other sites More sharing options...
Noobini Posted May 25, 2017 Author Share Posted May 25, 2017 (edited) ver 1.02: - Radius is now the main controller - now creates tyre + treads - tyre profile for customisations https://1drv.ms/u/s!AvgNse7E8aaygmPVBiiRxQCCb2yT Edited May 25, 2017 by Noobini Quote Link to comment Share on other sites More sharing options...
Noobini Posted May 25, 2017 Author Share Posted May 25, 2017 (edited) if anyone could tell me what to do about Normals...that would be great... Right now, some pattern might have their Normals pointing opposite to errrrmmm..normal...ie. down...not a show stopper as the tread depth can extrude either way...but I'd like it to be consistent...so in my Flatten node I can add a second Vexpression to set N = (0,-1,0)...easy peasy...but then the treads look 'smooth' and not with their original 'sharp' edge look...what's going on ? EDIT: OK, I should Add Vertex Normals in the extrude....but still puzzled why some geo works with positive extrude for tread depth...while some works for negative extrude....??? Edited May 25, 2017 by Noobini Quote Link to comment Share on other sites More sharing options...
f1480187 Posted May 25, 2017 Share Posted May 25, 2017 Turn off back-faces with Display Options (D key) > Optimize > Culling > Remove Backfaces option. Modeling is always side-aware, and default Houdini display makes user think it's not. Quote Link to comment Share on other sites More sharing options...
Noobini Posted May 26, 2017 Author Share Posted May 26, 2017 (edited) Thanks but I think the real problem is vertex order -> vertex/prim normal -> how it is extruded... ver 1.03: - now user will have option to flip face normals so the extrude will consistently work in the positive direction (negative is still there) - centre pivot and move to exactly on top of ground.....for export https://1drv.ms/u/s!AvgNse7E8aaygmh7yvPHwG_8sCgg Edited May 26, 2017 by Noobini Quote Link to comment Share on other sites More sharing options...
Noobini Posted May 26, 2017 Author Share Posted May 26, 2017 success !!! works with continuous strip...but since now the repeating patterns are no longer packed, coz I have to fuse them together, it's damn sloooooow...I'll have to optimise somehow Quote Link to comment Share on other sites More sharing options...
f1480187 Posted May 26, 2017 Share Posted May 26, 2017 (edited) True, the vertex order is what the side basically is. You can negate normal, and the side won't change: instead, the surface goes black with strange shading on grazing angles. Trace, as several other nodes, outputs side in a random manner. You can provide user checkbox to fix it himself when generated result is bad. But often you can automate process. Simplest way is: Group primitives by normal: known-to-be-opposite; spread angle: close to zero. Zero is prone to floating point errors and may not group some of reversed prims. Reverse grouped prims. Delete the group. We don't want to supply our user with weird groups and useless attributes. side_gotchas.hipnc Edited May 26, 2017 by f1480187 3 Quote Link to comment Share on other sites More sharing options...
Noobini Posted May 26, 2017 Author Share Posted May 26, 2017 oh yeah, the method on the right is to unify normals...great...thanks alot Quote Link to comment Share on other sites More sharing options...
Noobini Posted May 27, 2017 Author Share Posted May 27, 2017 (edited) ver 1.04: Now with continuous patterns !!!https://1drv.ms/u/s!AvgNse7E8aaygmpHTfIeHlG0O4nN Edited May 28, 2017 by Noobini 1 Quote Link to comment Share on other sites More sharing options...
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