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# How to animate something in a spiral with wind

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 How to animate something in a spiral with wind on Jan 31, 2013 at 5:37:59 am

Coming into solving this problem, I was pretty confident, and happy that my mathematics knowledge from high school would not go to waste. My initial thoughts on animating a cloth in a spiral went along the lines of animating the x and z wind values in out of phase sinusoidal curves along with some gravity or -y wind. I tried this but for some reason, the wind just sends my object in an ugly spiral off to the left of the scene. I have all the other values (eg. turbulance) set to zero except wind impact, wind strength and the animated values.

For the life of me I cannot understand why this happens, I thought the theory was simple enough that it should work without too many problems but it just doesn't do what I want it to. I was thinking of using a helix and doing the whole 'align to spline', but I'm not 100% sure how that would work with something I need to apply cloth dynamics to, along with the fact that I'm thinking it would not look as natural as something animated with the wind parameters.

 Re: How to animate something in a spiral with windon Jan 31, 2013 at 9:43:08 pm

seeing the file might help but no promises. My thought would be like yours, use a spline to get the flight path I want - then add randomness by whatever means would work in the situation

 Re: How to animate something in a spiral with windon Feb 8, 2013 at 3:34:35 am

Sorry I've been so distracted...

Here's my project file, I cleaned it up a bit but it still might be a bit hard to navigate:
5411_ribbonspiral.c4d.zip
I used a tracer object to get a better idea of the path of the ribbon. I think this was also at a stage where I was ramping the wind up for each consecutive keyframe.

I have a feeling wind functions in a way that once the value is set at a certain keyframe, it needs so many more keyframes to actually accelerate to that rate and the amount of keyframes depends on the wind strength, etc.