Grasshopper

algorithmic modeling for Rhino

Lines between closest points of two point clouds

Hi All,

I am a 3D modeler working with very large point clouds from 3D laser scanners.

I have a specific task to connect the closest matching points of two almost identical point clouds that form the inner an outer surface of a shell object.

The result would be a number of very short lines going from the points on the outside, to the closest points on the inside.

I am not familiar with Grasshopper at all and would greatly appreciate any advice on how to do this.

Regards,

Mike.

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To just find the [closest point] is fairly easy. In case you want to match them though, so none of the points is used twice it will get more tricky by the use of an iterating process. 

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Hi Phillip, as I mentioned, I am not familiar with Grasshopper at all.

How do I use this ?

Cheers,

Mike.

Reference your two point clouds.

You will only need the two highlighted components of the definition and replace their inputs by either point collection.

To get a little into it, I can highly recommend the Primer.

Best,

Phillip

Example of an iteration process:

(34000 points in 2 lists, can probably be optimized)

The C# component is doing a simple iteration, the components after clean the lines which are too long.

You perhaps need something similar to http://www.grasshopper3d.com/forum/topics/selection-of-a-point-a-li... though

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