Sine wave struggles

[stijnvanaardenne (stienfromarden)]

Hi,

For a project I am working with some sine waves, I got it working kind of how I want but struggling with one imperative point of this.

I want te create a few waves with different values ie, height and repetitions. But all sine waves need to start at 0,0,0mm and end at 1000,0,0mm I got it now till the point that the wave stops at 1000mm on the x axis but I need it to stop, and be on 1000,0,0 (so on the base line)

I try to understand what sort of math I need to incorporate to make it work but I can’t figure it out… anybody has a way of doing this?

btw i need lines to sometimes arrives from -y and sometimes from +y, so that would mean not al waves need to be 360, sometimes start at 180 and end at 180 etc etc.

File attached: (25.6 KB)

[Joseph_Oster]

Your geometry is not internalized:

From the flyover view of this model though, I might prefer to start from scratch as this looks too complicated:

[DanielPiker]

I’m not sure what the file you attached is - it seems unrelated to your question and image. Are you sure you uploaded the right file?

Anyway, to make sine waves that are zero at the start and end of a curve, you can reparametrize and evaluate the curve from zero to one, multiply this t value by some integer*Pi and take the sine of that:
sinewave.gh (8.0 KB)

[stijnvanaardenne (stienfromarden)]

ah damn, this is the wrong file…

ok again the correct one:

sinewave1.gh (16.5 KB) sinewave1.3dm (3.5 MB)

[Joseph_Oster]

@DanielPiker

Anyway, to make sine waves that are zero at the start and end of a curve, you can reparametrize and evaluate the curve from zero to one, multiply this t value by some integer*Pi and take the sine of that:

Sounds good! You didn’t internalize your curve so had to add my own:

[stijnvanaardenne (stienfromarden)]

nice thanks, this looks good, but only using odd numbers make does the trick now?

[DanielPiker]

Sorry, I don’t understand the question.

[stijnvanaardenne (stienfromarden)]

It seems your file works, but, only with uneven numbers (5,7,9 etc) if I divide by 6, you see at the end of the line a tiny piece of the next line, sorry hard to explain…

[Joseph_Oster]

And to elaborate on @DanielPiker’s code to answer the thread issue:

[stijnvanaardenne (stienfromarden)]

ah wow! yesss, only adjustable heigt and some offset at the start, to make some lines start at 180 degrees… I have been struggling for two nights with this haha

[stijnvanaardenne (stienfromarden)]

oke got the height adjustable through a multiplication before the movement on z…

any tips on how the adjust the start position?

[Joseph_Oster]

@stijnvanaardenne

any tips on how the adjust the start position?

Add a phase shifter. Thanks @DanielPiker, that’s so simple!

sinewave_2020Oct6a.gh (14.2 KB)

Wavelength, frequency, amplitude…

[Joseph_Oster]

I started to answer your question with a copy of this - wavelength, frequency, amplitude and damping:

Ripple/Raindrop Pattern

In the damped sine wave equation, does energy correspond to Amplitude and volume correspond to Wavelength? Wave form and propagation are probably among the most studied and best understood aspects of physics so the answers we seek are certainly well documented in textbooks. But for the lazy artist trying to visualize ripples, consider this waking insight: [ripples_2020Sep23a] The white curves are a result of plotting the damped sine curves for each point along the X axis, then mirroring th…

The white and blue curves on the XZ plane are lovely and can be shifted in phase.

@DanielPiker’s equation in code is simpler but I might dabble further with this…

[stijnvanaardenne (stienfromarden)]

thank you guys so much!!

[Joseph_Oster]