# 5- Parametric Curve Attractor

In this video tutorial, I will explain how you can use u,v coordinate system to produce a parametric curve on a surface and use it as an attractor to affect the frames of triangular panels.

**20 Minutes**

**60 MB**

In this grasshopper example file you can use the Kangaroo2 Plugin to simulate a differential growth pattern on a surface.

In this grasshopper example file You can design a Facade by defining a parametric base curve .

In this grasshopper example file you can create a pixelate pattern by removing random vertices and using the pufferfish plugin

In this grasshopper example file you can model a Deformed Voronoi pattern on a catenary surface.

In this grasshopper example file you can use the "Lorenz Attractor" component from the Chimpanzee`s plugin as a base for modeling a Polyline attractor.

In this grasshopper example file you can generate a parametric Differential Growth Curve by using the Kanagroo2 & Chromodoris plugin.

In this grasshopper example file You can model a parametric random wave-like facade by using the graph mapper component.

In this grasshopper example file you can model a parametric curve by using a timer and a sine function.

In this grasshopper example file you can create a parametric table by using the Dendro plugin and by voxelizing a series of parametric lines.

In this grasshopper example file you can model a 3d parametric wall pattern without using any plugins.

In this grasshopper example file you can model a parametric stair by defining a closed planar curve in Rhino

In this Paracourse Lesson you will learn how to model a parametric wavy facade by using the graph mapper component and also shifting the pattern for each level.

In this grasshopper example file you can create different parametric patterns based on a triangular grid cell.

In this grasshopper example file you use multiple point attractors to deform a base surface and convert them into parametric strips.

In this Paracourse Lesson you will learn how to model a simple tensegrity structure by using the Kangaroo2 Plugin

In this grasshopper example file you can use the Anemone plugin to model a parametric rotating 3d pattern.

In this grasshopper example file You can use the Pufferfish plugin to create a 3d wave-like displacement on a mesh surface.

In this grasshopper example file, You can use the Anemone plugin to generate parametric fractal patterns and then project them down on a dome.

In this Grasshopper example file, you can use the Boid plugin to simulate the Wandering behavior of a series of particles with randomized vectors.

In this grasshopper example file you can model different stair types by changing the base polygon.

In this grasshopper example file you can create parametric tower covered by a hexagonal structure pattern using the Lunchbox plugin.

In this Grasshopper example file you can generate a series of random points on a base surface and then use the Kangaroo2 + Dendro plugin to convert it into a parametric mesh.

In this grasshopper example file You can Design a parametric brick facade. By defining a curve attractor you can also dispatch the nearby bricks into two set of groups.

In this grasshopper tutorial, you will learn how to model a zigzag parametric facade in Grasshopper.

X

Learn Grasshopper3d Faster & Easier with ParaCourse |

## Comments

## Felsager

More tutorials like this should happen more often. The possibilities for further developing this one are almost endless. This generalizes a lot of topics in a single lesson.

Outstanding tutorial.

## rezae

Thank you!

I am grateful for your support.

## Cfeldman

What if you have a “”Polysurface””,and not a ‘Surface’ to apply the LunchBox-plugin and…

finally go to Panelling-Attractor exercise.

How to resolve that ?

Thanks your help…………….

## rezae

Hi Claudio

Surfaces are singular and continues which means you can do everything that you could done on 2d space inside rhino you’ll be to do on the surface (instead of x and y , you have U and V) but Polysurface are made from surfaces so you cannot define a point on a Polysurface with just 2 value (like x and y), even though you can have access to each individual surface on a polysurface but aligning pattern on edges would be very difficult .

So I think easiest solution is that you can work on unfolded (expanded) version of your polysurface and then rebuild the generated pattern on the polysurface

## rw3iss

Attachment

2021_10_14_00_49_26_13dm.3dm_108_KB_Rhinoceros_7_Corporate_Perspective_.pngHi, it is a great tutorial, thank you!

I am wondering if you could advise on how to remove this connecting line attached here…

I changed the arc to an ellipse, to make a complete form, and this line appears during the Loft stage.

I can’t find a setting in the Loft or Weaverbird PanelFrame to have it not show.

If it is a little complicated, can you just briefly explain it? Should I think to remove such a thing earlier on at the loft/curve stage, or later in the Weaverbird construction, or after?

Here is my modified grasshopper definition if it helps: https://drive.google.com/file/d/1bFa92gkGJHSRb9YFzB7LHUQABVkwFxjs/view?usp=sharing

## rezae

Hi, we can not apply this solution on any periodic surface since the pattern is symmetrical on Z axis so the pattern couldn’t wrap around periodic surfaces

thanks