# smooth out a sawtooth wave

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Hi,

i have a sawtooth wave from a fraction op and i would like to drive a displace along normal with it in bump only mode. i would like to ask that how is it possible to smooth out the jump from near 1 to 0?

thanks

bmt

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Hiya,

without knowing the specifics your case, here's a couple of ideas:

- Multiply the sawtooth wave with something that's 1 everywhere else, but falls rapidly to 0 at 1.0 (or at the end of your period)

e.g. a complement of your sawtooth curve raised to a large power.

See attachment, curves in the image are 1) the sawtooth 2) the complement of (the same ^ 20) 3) the product of the earlier two.

The downside of this is that getting the bottom of the slope smooth as well is a bit trickier.

- Use your sawtooth value to index into another curve. Maybe something sin-based, or perhaps a ramp for manual control.

spline vop? smooth? Too sleepy to think this thru atm

- As a last resort - multisample. Take a couple of more samples with small deltas in your u-coordinate or whatever, and take an average.

I think the result will be piecewise linear, so you probably need many samples to get nice highlights.

eetu.

soft_fraction.hipnc

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Hey,

thanks eetu, good thoughts help a lot!

my conclusions: smooth only smooths the inner values of it's range. with spline in theory one can build a lot kind of curves, in this case i wasn't able to get what i want. after tweaking seven keys with no acceptable results, i gave up.

the solution i reached is more like your first idea. first i solarized the fraction and applied the power after that. then i took the complementer, smoothed it to get rid of the discontinuity around zero. multiplying this with the original fraction gives a fairly decent result with rather good controls.

thanks again!

bmt

ps: inspecting your vop's output in the motion view is a very good idea. thanks for that also!

soft_fract.hipnc

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