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View Full Version : "Thicken for 2pt polys"? Exists?



jeric_synergy
10-19-2015, 10:18 AM
Is there an analog for "THICKEN" for 2pt poly networks?

(Essentially, this would result in the same as using the "negative line thickness" hack in Layout, but generate actual geometry."

This would specifically address issues with networks that are not realizable as 3d objects.

probiner
10-19-2015, 10:21 AM
http://forums.newtek.com/showthread.php?117087-Convert-2-point-poly-chain-into-Tube

jeric_synergy
10-19-2015, 10:46 AM
Thanks for the find, Probiner: we've been around this block before I guess.

(researching the "Voroni bracelet" query on FB.)

probiner
10-19-2015, 11:09 AM
The video is still around: https://app.box.com/shared/tuk7syvej1

erikals
10-19-2015, 03:35 PM
bit tricky to watch swf at times, hope a Youtube upload is ok, didn't make it public though...


https://www.youtube.com/watch?v=e_kEVmYl7So

probiner
10-19-2015, 05:16 PM
Well, given I have a YT account you could have suggested, but no worries, lol :) Easier to watch now.

But the title is misleading. I'm not turning 2pp into tubes, but closed mesh edges.

Cheers

erikals
10-19-2015, 05:36 PM
ah, forgot you had an account... bit slow these days... http://erikalstad.com/backup/misc.php_files/smile.gif

converted it for you, maybe you can upload it to Youtube ?
erikalstad.com/cgtemp/closed-mesh-edges-into-tubes.zip

jeric_synergy
10-19-2015, 05:49 PM
bit tricky to watch swf at times, hope a Youtube upload is ok, didn't make it public though...
Thanks erikals, and in fact my laptop freaked out at the *.swf extension.

probiner
10-19-2015, 06:01 PM
ah, forgot you had an account... bit slow these days... http://erikalstad.com/backup/misc.php_files/smile.gif

converted it for you, maybe you can upload it to Youtube ?
erikalstad.com/cgtemp/closed-mesh-edges-into-tubes.zip

It's alright mate! Now, you're making me feel bad I don't speak in the video :D

erikals
10-19-2015, 06:42 PM
hehe http://erikalstad.com/backup/misc.php_files/smile.gif

maybe later on? http://forums.cgsociety.org/images/smilies/arteest.gif

but now, sleep... 3am over here... http://erikalstad.com/backup/misc.php_files/sleeping.gif

jeric_synergy
10-19-2015, 07:58 PM
...whoa...pretty fast to follow. Had trouble tracking the cursor.

I'm not sure Probiner's method will work w/what I had in mind: literally just a bunch of Edges, never any 3+ polys at all. I'll have to transcribe what he's doing.

EDIT: it seems everything posted relies on actual 3d geometry existing, rather than plumping up 2d polychains.

Danner
10-20-2015, 01:44 AM
Very nice video tut, I wish I had seen this sooner.

prometheus
10-20-2015, 04:36 PM
what I see in the clip is a workaround, and with edges on geometry, that wonīt work on polychains only I think.

I havenīt come across a tool that thickens polychains as they are, that can have joints merged, like if you draw out a figure with the line pen and wants to thicken.
I can use metaedges to get a mesh from it, but the reusult is of course to messy, youvé seen it before and you are probably fed up on it..but hereīs the samples again :D



https://www.youtube.com/watch?v=bFA65euBtEY


and note that david ikeda was workin on a tool that creates a mesh from some sort of polychain, strange..canīt find his site..seems gone or something.

erikals
10-20-2015, 06:35 PM
and note that david ikeda was workin on a tool that creates a mesh from some sort of polychain, strange..canīt find his site..seems gone or something
https://www.facebook.com/people/David-Ikeda/100004889147964

prometheus
10-20-2015, 09:01 PM
https://www.facebook.com/people/David-Ikeda/100004889147964

donīt have facebook...and it doesnīt say much anyway..I know he had some vids out discussing his development..but canīt find it now.
he or someone with that name has an empty video channel on both vimeo and youtube.

donīt want to bother him either..just curious where it all went.

ConjureBunny
10-20-2015, 10:22 PM
Thicken a chain of two point polygons?

I have something that can do this, but it's 20 years old now, and written for OpenGL. I could probably rewrite it as a plugin. I was meaning to dust off all that stuff anyway.

Can you tell me a little more about your specific case, so I can make sure it does what you need?

-Chilton

jeric_synergy
10-20-2015, 11:15 PM
Oh, we were tossing around a puzzle on FB, and I thought the fastest way to make it would be to make a cylinder, STRANDERIZE it, and then plump it back out after deformations with what is apparently a non-existent tool and/or methodology.

As one does.

+++++++++++++
Archiness aside: something that could take an arbitrary network of 2pt polys, such as one might get from a StrandMaker-treated ("Stranderized") mesh, and then swap in a series of tubes, with neat junctions. To maintain sanity, you could limit the intersections to only 3 and 4 joint intersections.

"Truss2" is similar in concept, but it cheats wildly at the joints. Hopefully this tool would generate subd-able meshes.

User parameters would include:

# of sides to a tube ( minimum=3)
radius of tube (auto-suggested)
# of divisions between intersections.
Optional Point Set naming for intersections & tubes
Optional Part naming for intersections & tubes
Optional Point Set naming for tube division points


As it is: the puzzle was solved, but such a tool still might be intriguing. Here's the FB thread:
https://www.facebook.com/groups/lightwiki/

Scroll down for "Voronoi Bracelet".

erikals
10-21-2015, 12:40 AM
hm, maybe this springs some ideas?
DPont Verdure Tree Plugin


https://www.youtube.com/watch?v=vbF3axvRmEg

jeric_synergy
10-21-2015, 12:45 AM
Can it handle toroids?

erikals
10-21-2015, 12:57 AM
http://forums.newtek.com/images/misc/quote_icon.pngConjureBunny

Thicken a chain of two point polygons?
I have something that can do this, but it's 20 years old now, and written for OpenGL. I could probably rewrite it as a plugin. I was meaning to dust off all that stuff anyway.
Can you tell me a little more about your specific case, so I can make sure it does what you need?

-Chilton

interesting, interesting http://erikalstad.com/backup/misc.php_files/smile.gif http://erikalstad.com/backup/misc.php_files/smile.gif

erikals
10-21-2015, 03:55 AM
kinda forgot...

JoePoe's video


https://www.youtube.com/watch?v=Ak5XzSRmIgU

erikals
10-21-2015, 08:06 AM
another go >


https://www.youtube.com/watch?v=Ak5XzSRmIgU

Waves of light
10-21-2015, 09:05 AM
Ingenious method for getting the control cuts at each junction Erik!

jeric_synergy
10-21-2015, 09:36 AM
Excellent examples....BUT, still not what's on the tin.

prometheus
10-21-2015, 10:42 AM
Thicken a chain of two point polygons?

I have something that can do this, but it's 20 years old now, and written for OpenGL. I could probably rewrite it as a plugin. I was meaning to dust off all that stuff anyway.

Can you tell me a little more about your specific case, so I can make sure it does what you need?

-Chilton

guess jeric who owns this question has answered your question, for me though it sounds interesting if you could pull something off.
if you for instance use the line pen tool to draw a room, and then you would need a thickener..at least in offset mode to create a wall, then it would be easy to thicken it..that is one example.
another would be if you use the line pen tool to draw a figure with symmetry on but not just flat..the figure sketch should be correct top, side and front views..as I shown in my vid sample of metaedges and the line pen, the important factor is where points are connecting in the polylines, at those joints there is a need of more division segments.



hm, maybe this springs some ideas?
DPont Verdure Tree Plugin



https://www.youtube.com/watch?v=vbF3axvRmEg

Yes..that is what I suggest too...something like dp verdure wich has itīs own module to use skelegon mode or polyline mode and turn it to subdiv or just polys, so the underlying meshing tech seems to be able to get acess to, but with dp verdure.. it is very restricted to itīs own module..not being able to pick up manually created polylines.

erikals
10-21-2015, 12:55 PM
http://forums.newtek.com/images/misc/quote_icon.png Waves of light
Ingenious method for getting the control cuts at each junction Erik!

thanks Mister! http://erikalstad.com/backup/misc.php_files/047.gif


http://forums.newtek.com/images/misc/quote_icon.png prometheus
Yes..that is what I suggest too...something like dp verdure

i Absolutely think that algorithm is on to something... http://erikalstad.com/backup/misc.php_files/smile.gif


http://forums.newtek.com/images/misc/quote_icon.png ConjureBunny
I have something that can do this

sounds Awesome. http://erikalstad.com/backup/misc.php_files/035.gif

prometheus
10-21-2015, 03:55 PM
if that verdure algorithm or ConjureBunny whips up something..it might be able to even make use of genoma presets for instant mesh that wouldnīt need any posing...in my metaedges experiments I could convert genoma to a mesh directly, the mesh topology is a mess though, so one has to go through polyreduction and export to sculptris to get a symmetrical poly flow in the mesh.
But if one could employ such algorithm upon skelegons as well..that would be awesome.

I could settle for a tool that thickens the polylines and skelegons with some more divisions on the joints, but it would be awesome if it could work to re-mesh if you tweak a polyline..as I do in my metaedges experiments...and that is something I seem to have seen with david ikedas app, itīs a simpler form of zbrush skeleton but actually more natural to move,scale, stretch, and edit polylines and points with polylines.
if this can be made to work, it would enhance the way we can create very complex nested, twisted structures as well as creating base mesh figures...topmod wouldnīt be needed for that.

jeric_synergy
10-21-2015, 05:09 PM
kinda forgot...
JoePoe's video

https://www.youtube.com/watch?v=Ak5XzSRmIgU
I wish we had the ability to add tags to a thread AFTER it's commenced-- that would make finding them again more certain.