Move Sine Wave Withing a Domain

Hello everyone!

Im currently trying to generate a sine wave with graph mapper, but with the addition of having planar points to both the side of this wave.

So the goal would be to:

-Move the Sine wave around this domain

-Maintain always the same separation between points

-Change the domain extension of the sine wave, being the maximum length the entire original domain set.

I have been trying with consecutive domains component, but Im not sure its the answer, the sliders are pretty loose and the separation between points is not always the same.

Attachments:

Move Sine Wave.gh, 7 KB

Replies to This Discussion

Permalink Reply by David Rutten on November 15, 2016 at 7:47am

Attachments:

MoveSineWave.gh, 13 KB

Permalink Reply by ShynnSup on November 15, 2016 at 10:21am

Hello David, thanks for you answer. Isnt there a way of keeping the graph mapper in this case? So that when the sine weave does not start at 0, there would be a "jump" from the moment the wave starts.

Also the sine curve does not seem to "move" along the domain of points. By this I mean to maintain the sine curve's domain length, but vary its position inside the greater domain. Practically to have the same shape of the curve, but more to the left or to the right.

Permalink Reply by David Rutten on November 15, 2016 at 10:53am

You can't get much information out of the graph mapper. You'd need to figure out the wavelength and 'zero' peak, which is not accessible from the outside.

If you want to control the sine using the peak location instead of the start and end of the wave, you'll have to adjust the equation slightly. Then you can have one slider which moves the wave left and right, one which moves it up and down, and one which changes the length of it.

Permalink Reply by ShynnSup on November 16, 2016 at 6:30am

I assume its a complex equation? I really got no clue how to arrive to that equation :(
There is a kangaroo component which creates a sine weave, and controls the phaseshift, frequency, amplitude, etc maybe this could be achived with it?

Permalink Reply by David Rutten on November 16, 2016 at 10:14am

It's no more complicated than the one I posted, just have to shuffle the t0 and t1 around. I'm on the road now with only an iPad, so I can't post any more files.

Permalink Reply by ShynnSup on November 17, 2016 at 5:59pm

Okay David, no rush, thanks for your help.

Permalink Reply by Laurent DELRIEU on November 19, 2016 at 2:03pm

As David says move t0 and t1.

Something like this ?

Permalink Reply by ShynnSup on November 19, 2016 at 3:32pm

For some reason I cant reply to you @Laurent Delrieu.

Thanks for your help, thats an interesting approach, but it does not suit my need.

First off I only need one curve.

A slider that controls the curves position inside the domain, being 0 totally to the left, and 1 totally to the right.

A slider which controls the length of the curve, to both sides. So that the curve grows from the middle.

A slider that controls its amplitude.

A slider that controls its frequency.

Thats pretty much it.

Permalink Reply by Laurent DELRIEU on November 19, 2016 at 3:47pm

So now you can do it by yourself ? you have everything. It is simple math.

Permalink Reply by ShynnSup on November 20, 2016 at 1:36pm

Im afraid I cant, the formulas you guys so kindly provided are quite far from reaching those controls, and just by looking at these examples I am afraid I haven't acquired the knowledge to re arrange them.

Permalink Reply by ShynnSup on November 22, 2016 at 6:07pm

Anyone please? How can these controls be achieved?

Permalink Reply by Vongsawat Wongkijjalerd on November 22, 2016 at 10:43pm

Here's a solution that doesn't utilize equations for the less mathematically inclined :P

You can also directly plug in values in to the bottom left Construct Domain to pin-point sine start/end instead as well.

Adjust the Sine wave in your mapper so the Y value is right at the top for the height (/amplitude) slider to become relevant. (or I guess you can eyeball it if it doesn't matter so much) Be careful that the wave is right in the middle as the y values of all the points on the right can become non-zero if its slightly off (in your example its just slightly off-center).
I tried replacing the Graph Mapper with a Sine component to simplify things (just had to change the preceding Remap target domain to '0 to Pi') but for some reason it doesn't look as smooth/nice.. whelp.

Rereading your question, did you also want the points to be equidistant in 2 dimensions, not just on the x-axis?.. in which case Interpolate(IntCrv) the result and Divide Curve to get equidistant points I guess.

Hope this one is a bit easier to digest for you

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