HOUDINI - how to point normals inward a curve

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How to use VOP attribute to make point's normal of a curve point inward a "close" curve, half of the angle between the two segments.

[@frankliang8285]

that's so amazing. thanks for sharing with us.

[@martinalexandersuriading]

Not sure what Houdini version you used for this recording, but thankfully now there is an "Orientation Along Curve" SOP which saves us from this math horror! 😂

[@SCTheBrand]

Would love to see more like this in vex. Great stuff!

[@Terranimator]

I will see if I can make an version of it in vex! thanks

[@beat.2504]

Thank you! Great explanation, worth the time. Thanks

[@Terranimator]

Glad you enjoyed it!

[@JimiMoso]

Nice way to do it! thanks. How about PolyFrame/BitangentName/N (makeFrameOrthogonal) ? or N and invert it.

[@Terranimator]

I may be doning something wrong, but I didn't get quite right angles doing this way. they are slightly off.

[@eggZ663]

@@Terranimator Set style to 'first edge' as well

[@成宇新]

Thanks! It helps me a lot !

[@nictanghe98]

It completly not working for me from the start.
If i use the Geometry fromVopOutput on the first 2 set of normalizes it points verry in a weird angle and not tangentional like with your example.

[@vrb_alex]

Great example of using dot and cross products!

[@antoniopepe]

Fantastico. Top one

[@aspirantnemo263]

Out of curiosity, do you still get perfect bisectiles angled normals if you don't use a resample node? I'm wondering if, without it segments of diff. lengths between "corners" will not require more adjustment with this set up to get the desired result. In any case, while I'm a bit more fluent with vex wrangles than with vops , I will definitely try this. Thanks for the contribution!

[@matteoforghieri]

the first part of the VOP i couldnt make it work (In my case i had more intricare curve), the normal of the point 0 was always messed up, so i used a polyframe SOP to get the orientation of the normal right. like in this tutorial ruclips.net/video/sIL2sq73TIA/видео.html&ab_channel=SergeyGolubev

[@Smoluck]

Having difficulties at ruclips.net/video/WHdhdx1zGDk/видео.html and i can't get any Cross values to Negative.
They all are at 0. It seems i missed something.
using Houd 18.0.566 i have weird angle at both extremity points also.
Btw, thanks for sharing.

[@matteoforghieri]

i think we had the same problem, try to watch this ruclips.net/video/sIL2sq73TIA/видео.html&ab_channel=SergeyGolubev

[@mono24]

what a terrible tutorial!