spiral

Hello,

I am trying to create a spiral from the 2D curve as shown in definition.

But I am having too much points in the Z directions.

I am wondering the reason of this issue and how can I transform my initial curve into a spiral curve.

Thank you for your help

Attachments:

spirale.gh, 12 KB

Replies to This Discussion

Permalink Reply by Daniel González Abalde on October 18, 2017 at 5:27am

Hi, I think you're a little lost. What are you really trying to do? You seem to be trying to convert a curve to a parametric curve, is that so? GH does not work that way, you have to create the parametric curve from scratch, that is, from the arguments of constructing curves, as points. The same to create points, if you want them to be parametric, you must create it with arguments to build points (in this case angle and radius for PointCylindrical component). So you can not use a curve as a construction argument to create a spiral, not unless you want a spiral that can be described by a mathematical function. The solution is to make a spiral from scratch, look in the forum for this, and adjust their construction arguments by hand to make it look like the curve you have.

Permalink Reply by Florino Ita on October 18, 2017 at 5:37am

what I want to do is the following, Imagine that the 2D curve is the projection of a 3D curve (that I want to draw) the 3D curve should have a starting point from 0 and ends up at an end point of Z = x...

So if we project the 3D curve in xy plan we will have the same curvature of the initial curve

Permalink Reply by Daniel González Abalde on October 18, 2017 at 5:51am

oh, this?

Permalink Reply by Joseph Oster on October 18, 2017 at 5:55am

Yeah, there are several errors in this algorithm. Maybe you were trying for something like this?

The scale of your curve is HUGE! 10,000 units in 'Z' for a spiral that's not very tall relative to its width.

Attachments:

spirale_2017Oct17a.gh, 18 KB

Permalink Reply by Florino Ita on October 18, 2017 at 8:00am

exactly I was trying this

Thank you

but why I was having in the last point of the spiral too many points ?

Permalink Reply by Joseph Oster on October 18, 2017 at 8:12am

Because you were supplying multiple values to the 'Series N (Step)' input, which created eleven separate series of ten values each. Connect a text panel to each component's output to see what is happening.

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