Full Version: Nodebundle for playing with nodes

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Message 7777.1229 was deleted

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Hi All,

I deleted my last post because I was getting sidetracked, & the solution was much more obvious.
It is to find circumCircle centre and draw lines to midPts of triangle edges like so.



I will do some further development of this approach, but I think I'm on the right track.
James

Image Attachments:
voronoiMidpts.gif 

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Hi James
I think it's the right method ...
divide the sides of each triangle in the middle, join the center
with these points ...(so far I have arrived here too)
but,what is the final method to obtain distinct poly ngon ?
for me this is the obstacle to overcome
al

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Hi Al (and others),

I have attached nod file for generating voronoi pattern from field of tessellated triangles (also attached).
This turned out to be far less complicated than originally thought. The real problem to solve now is converting
a field of points to delaunay triangulation.

James

Image Attachments:
voronoiCells.gif 

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Wow!!!

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Thanks Karsten, but it wouldn't be possible without your foundational node contributions.
Have you been working on anything new?
James

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Hi James and Friends
I saw your file, ingenious enough to create
a thicker along the edges of the polygons, then working
with the boleans we will get what we want ...
but it still does not work ...
In any cases where we want an integral polygon, we can not do it
because the connecting lines of the centers with the midpoints
the edges of the triangles intersect each other ...
even more if the mesh of the triangles and pretty uneven
here:
http://www.mediafire.com/file/1pf6zo59nkj5uq1/VORONOI.zip/file
you will find files that will better illustrate the problem,
I have also worked on your file, deforming the triangular mesh a little
and trying to lower the size of the line
(Sweept profile) but, under a certain value you can not go,
and so, as you will see, the result is not ,according to me, yet
satisfactory
have a nice day
al

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Hello James,
>>Have you been working on anything new?

I'm afraid not. I'm in the middle of divorcing my wife.

Some day I will start again.
Karsten

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Hi Karsten,

I'm sorry to hear that. I can only imagine how dispiriting that must be.
Please feel free to PM me if you need to vent to a sympathetic ear.
Perhaps a friend you've never met would be the perfect sounding post.

>> Some day I will start again. <<

For our sake, but mostly yours, I hope that day is soon
All the best
James

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Hi Friends
I continue with my research and study of interesting surfaces ,
and now it is the turn of this fairly recent geo-mathematical form
due to the genius and research of Paul Schatz ,
it was born only in 1939 and therefore relatively young ...
and In my opinion it is a charming, elegant shape that leaves
with open mouth......
how many interested will find here:
http://www.mediafire.com/file/9ftdpaksnr1mn2e/Oloid.zip/file
the math construction file of the form (relatively simple, I must say)
and a small simulation of movement ...
The Oloid is the only three-dimensional shape that can rotate over its entire surface.
and put in oscillating produces a movement of great charm,
on the web you will find news about the use of this shape to reproduce in the water
a wave similar to the natural one
Have a nice evening to all
al

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Hi all,

sorry for being off-topic, but i like to show you my aluminium sign,
from schildermaxe.de (excellent quality) from my previous post
here. Hope you like!



P.S. i did not went for laser engraving, because the price was to high.
Instead i used a sign maker service.

Regards
Stefan

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Hi Stefan, that's cool!

- Michael

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Thank you, Michael!

Regards
Stefan

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Hi node Coders,

I'm attempting to create a node based on Marco's ExtractCurvesControlPoints script: http://moi3d.com/forum/display.php?webtag=MOI&print_msg=8010.17

I think the problematic code is below shown in red

Any help would be greatly appreciated

James





// extractPts
function extractPts()
{
this.addInput("In","objectlist");
this.addOutput("Out","objectlist");
}

extractPts.title = "extractPts";
extractPts.desc = "extractPts";

extractPts.prototype.onExecute = function()
{
var inObj = this.getInputData(0, moi.geometryDatabase.createObjectList());
var output = moi.geometryDatabase.createObjectList();

var selPts = moi.geometryDatabase.getSelectedObjects().getCurves();

if (inObj.length > 0 )
{
inObj.setProperty('showPoints', 1);
moi.geometryDatabase.selectAll();
moi.geometryDatabase.copyToClipboardCommand(selPts);
output = moi.geometryDatabase.pasteFromClipboard();
}
this.setOutputData(0, output);
}
LiteGraph.registerNodeType("Objects2/extractPts", extractPts);

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Hi James, maybe you're missing step #4 from that http://moi3d.com/forum/display.php?webtag=MOI&print_msg=8010.17 example - if the curve itself is selected along with all the control points it will copy the curve. To get points it needs to be curve itself not selected but its points are selected.

So try something like selPts.setProperty('selected', 0); in between the selectAll() and the copyToClipboardCommand()

- Michael

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Hi Michael,

>> missing step #4. <<

Yes the curve does need to be deselected, but the real issue is that either, the selectAll() method does not seem to capture any geometry or copyToClipboardCommand() doesn't copy: (certainly, the clipboard is empty on running nod file.)

James

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Hello James,

I can't test or Experiment with the code at the Moment, but I'm not sure that the curves are already members of the database.

Have a nice day
Karsten

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Karsten's comment reminded me of Michael's help in the chain script, back in 2013, related to using a circle in a sweep:

// Next line is needed for sweep to work, per MG.
moi.geometryDatabase.addObject( circle );

- Brian
(For what it is worth...)

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Hi James, yeah like Karsten and Brian write above selectAll() will only get the objects if they are in the geometry database and not if they are "loose" objects.

- Michael

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Hi All,

Well, I have not manage to get "extractPt" node to work.
http://moi3d.com/forum/index.php?webtag=MOI&msg=7777.1248

After repeated failed attempts, I was feeling a little disheartened; and really needed a win, so I returned to a node I was confident I could solve.

So please find attached new arraysExt.js inclusive of new "reRange" node (shown in red) which performs an identical function to my "reMAPrange" macro (see output arrays X & Y in image).

There are a lot of applications for remapping the differential domain of an array, so it is deserving of a dedicated node rather than a macro.

A great weekend to all,
James



UPDATED:

ArrayExt.js has been moved to here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=7777.1251


I have also included a couple of simple utility nodes: "arrayRev" which reverses the order of an num array & "arraySort" which sorts an array into ascending order. see below

Image Attachments:
reRange.gif  sort&Reverse.gif 

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