vector

Hello

Could anybody tell me how to set direction to vertexes that way if they are on curve or surface?

Could anyone give me advice, or link.

Replies to This Discussion

Permalink Reply by Маргарита on April 25, 2015 at 10:20am

now, something like this

Attachments:

4.3dm, 53 KB
4.gh, 12 KB

Permalink Reply by Riccardo Majewski on April 25, 2015 at 11:35am

You set "reverse" on the output of Amplitude component.

That is wrong, that just reverse the order of the outgoing list.

You need to use Reverse vector component as you will see.

Also Amplitude component need a number at input "A", there instead you connected points....

Attachments:

4.gh, 16 KB

Permalink Reply by Маргарита on April 25, 2015 at 11:49am

thank you so much
could you teel me how to get from those vertexes the volume or based on those vertexes?

Permalink Reply by Riccardo Majewski on April 25, 2015 at 11:55am

the volume or based on those vertexes...?
Can you explain?

Permalink Reply by Маргарита on April 25, 2015 at 12:08pm

sorry.


based on those vertexes

Permalink Reply by ng5 Alex on April 25, 2015 at 12:18pm

i sense some language communication difficulties .

Permalink Reply by Riccardo Majewski on April 25, 2015 at 12:19pm

yeah...

Permalink Reply by Маргарита on April 25, 2015 at 12:44pm

I won't argue on this point:)

Also I need to get a shape that looks like the first one ( the one we started from)

Permalink Reply by Riccardo Majewski on April 25, 2015 at 1:17pm

Map, I still haven't understand what you need.

You need the volume of what? Of the whole design?

You need a shape that looks like the first one... which one? The circle with arrows? I've already gave you a fixed definition.

You have to describe what you need and what you want.

Try to read what you write, it's impossible to understand (at least for me).

Permalink Reply by Маргарита on April 26, 2015 at 5:08am

In the end I need to get:
1. Points should be pulled back from original on different distance (amplitude should be different)

2. If you look on the section of the shape(with which you helped me with in grasshopper), we will see:
a) original Surface 1 , on which there are points (like Point1), based on certain grid. on different distances from Point 1 there are another kind of points ( like Point 2). How can I make them?
b) by obtained points ( Point 2) I need to build curves ( like Curve 2). And after this build a new shape, based on those Curves. ( for example, using Loft).

Permalink Reply by nikos tzar on April 26, 2015 at 6:48am

Hello Margarita,

Based on your sketch I believe you want something like this:

1. The vectors you get from [EvalSrf] are perpendicular to the surface. If you want them to always be on the xy plane, you can use a [Project] component.

2. In the above solution all the vectors have equal length(amplitude). If you want different lengths you will have to replace the slider with something else. But you must first decide: How will these lengths be different?

Based on the distance from one point (attractor)? Based on the curvature of the surface? Based on the elevation (Z coordinate) of each point?....

So you should decide a specific rule, for example: The vector lengths start from 1000 on the lowest point to 5000 on the highest point.

So after that you move the points by these vectors. In order to create curves on these points you must first orgasize them into lists. You can do this with [Partition] component, using U count as the list length. Then you can use [IntCrv] To draw the curves.

Hope this is clear so far. When you decide about the vector lengths we can see how to replace the slider!

Permalink Reply by nikos tzar on April 26, 2015 at 6:50am

Here is the file:

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