Jerking endpoints on animation

Forums Technical Discussion Jerking endpoints on animation

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Island: Member; 340 posts; Joined: June 2017; Offline

July 9, 2017 8:10 p.m.

I asked this on the Indie forum, but this might be a better place to ask about why endpoints jerk with animating a curve. I have attached a Houdini problem that has the problem and an equivalent C4D file that works. However, since Houdini allows me to extrude groups after creating the sweep, I would like to use the Houdini version going forward. Any suggestions on where the error is on the endpoints? Thanks.

Attachments:
PathCurve.hiplc (108.6 KB)
SweepNurbTapered.c4d (1.4 MB)


anon_user_37409885: Member; 4189 posts; Joined: June 2012; Offline

July 9, 2017 8:22 p.m.

Not sure how people use C4D but simply looking at your point counts shows it is changing as it's being resampled.

Simply set a Maximum Segments amount.

Attachments:
PathCurveEDIT.hiplc (108.6 KB)


Island: Member; 340 posts; Joined: June 2017; Offline

July 9, 2017 11:24 p.m.

Thank you so much! That makes complete sense, and it fixes it. One other issue: is there a way to alter the ramp so that it is a curve rather than linear between points, so that it is smoother? I assume one could write an equation based on the sine wave, but is there an equivalent of bezier points on a ramp?


anon_user_37409885: Member; 4189 posts; Joined: June 2012; Offline

July 10, 2017 12:17 a.m.

on the CrossRamp node? You can set those ramp points to Bezier, select the pointy box under the ramp and set the Interpolation on all points - it's a bit old-skool in that you need 4 points, 2 handles / 2 knots and they aren't connected. have a play.


Island: Member; 340 posts; Joined: June 2017; Offline

July 10, 2017 12:23 a.m.

Thank you!!

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