[Plugin] triangulateFaces.rb v1.2 20101120
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Here's v1.1 http://forums.sketchucation.com/viewtopic.php?p=175613#p175613
Thanks to Thomtom's knowledge of uvs mapping etc it now successfully triangulates any face [even with holes like Swiss Cheese] and keeps the front AND back uv texture mapping as it was ! Thanks! -
Hi TIG,
Would it be possible for the plugin to triangulate faces with a more "even" or "regular" triangles? After this topic, I thought maybe pre-triangulating the face on the ramp would spare some extra hand-work but it seems that the plugin triangulates the faces just exactly the same way native SU does when autofolding.
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@gaieus said:
Hi TIG,
Would it be possible for the plugin to triangulate faces with a more "even" or "regular" triangles? After this topic, I thought maybe pre-triangulating the face on the ramp would spare some extra hand-work but it seems that the plugin triangulates the faces just exactly the same way native SU does when autofolding.TriangulateFaces uses the built-in SUp mesh making methods, which presumably match the auto-fold ones, hence the similarity.
You might have noticed that my ExtendEdgesByRails script does produce a neat set of faces as that can't use the mesh methods directly but has to make up its own...
Using EEbyRails is a MUCH simpler way of making a curved ramp - I've attached an example...
EEbyRailsSimpleRamp.skp -
Thanks TIG for the examples - although my question was more a bit "academical" and theoretical - but at least I know why the two meshes are similar.
Certainly the other twoo tools are also great and would probably fit more to this particular need - that moving of the face was just so simple method - too bad autofold screws it up.
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@gaieus said:
Certainly the other twoo tools are also great and would probably fit more to this particular need - that moving of the face was just so simple method - too bad autofold screws it up.
This triangulation would be a separate plugin. It's just too specific. But I've been thinking of this myself. I often find I want such partitioning. It seems that it's usually long strip of a face where two of the sides runs parallel-ish to each other. So you want an edge to go between each opposite vertex. I've had it on my list of things to do - just not got around to it yet.
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Yeah, I agree -- having a more uniform triangulation method is preferred. It makes things a lot easier developing models if it's more uniformed and less "meet all at one point".
With the current method, I have to spend time flip-flopping various divisions (and sometimes just recutting the face).
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@tig said:
###,
Plugin parts by TIG**. 20090729
v1.1
Rewritten entirely by TIG... THEN completely corrected by Thomthom (TT)!***
It now retains all Texture mapping successfully. 20091203[attachment=0:kz9i3jbr]<!-- ia0 -->triangulateFaces.rb<!-- ia0 -->[/attachment:kz9i3jbr]
Im using this & seeing the UV mapping failing...is this the latest version?!
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Got a sample of where it fails?
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@thomthom said:
Got a sample of where it fails?
If you look at the texture in the tringle before & after you will see that it is affected. When I export the model as a mesh the surface is indeed messed up.
I hope the image is enough to work from?!
Thnaks for looking into this. This script could save me a lot of hassle if working correctly
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hmm...? Are you using Sandbox tools to modify the geometry afterwards?
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Yes.
Should I be using an alternative?! -
That is causing the UV to distort, not the triangulation.
The flip function in sandbox doesn't preserve UV mapping when flipping. -
@thomthom said:
The flip function in sandbox doesn't preserve UV mapping when flipping.
Sorry Woz; that was my suggestion I know...
Thom; any other idea? Rewriting the sandbox tools for instance?
(Or maybe some vertex edit tools?)
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@gaieus said:
Sorry Woz; that was my suggestion I know...
No worries Gaeius Im grateful for whatever help I can get
I should really introduce myself & what Im trying to achieve.
So Im a hobby artist that fell upon Sketchup back in version 3. Ive found it to be the most user friendly UI for quickly pulling a model together albeit somewhat quirky. Ive tried other apps like 3DSM, Maya, Lightwave etc & those intefaces are just too over complex for simple modelling. PLUS they come with extreme pricetags. SU for me was a happy medium.
The models Im creating are for use with the Unreal 2.5 engine for the development community of this application: http://avayalive.com/WaStore/Overview.aspx
There are a few problems that I need to be able to overcome.Unreal uses meshes in a triangulated form & uses vertex lighting so I need to be able to see the mesh in a triangulated form prior to exporting & allow me to be able to edit those triangles so that the vertex lighting is shown correctly. At current some bad triangles are shown with hard shadows on flat surfaces due to the nature of the triangulation created. With the ability to edit those triangles I can quickly edit the mesh in SU PRE-EXPORT so the creation doesnt have these issues. Other apps such as 3DSM recommend re-tesselating the mesh to breakdown the triangles into smaller surfaces, however this also is detrimental as it increases the polycount, which is at a premium considering the overall level created.
Gaeius recommended the use of this script along with the sandbox "flip edge" tool to see if it would solve the problem. Whilst the triangulation script works the UV as we now know is messed up with the flip edge tool affecting the polygons UV mapping.
So is there a suitable solution that can meet my needs?
BTW: the .alive project is something I plan to open up to the SU community in the coming weeks as there is a lot of potential for modelling, texturing etc & all with a small learning curve they could soon be developping whole environments Some projects also have funding!! -
@gaieus said:
Thom; any other idea? Rewriting the sandbox tools for instance?
something like that.
@gaieus said:
(Or maybe some vertex edit tools?)
I do have plans of making Vertex Edit keep UV mapping when modifying geometry. But probably not fro initial release. But it won't help in this case as it would not flip edges.
It's a real shame that UV coordinates doesn't stick in SU when you modify geometry - that each tool would need to implement a feature to keep them.
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damn...sounds like theres no easy solution.
Could a UV script not be written that uses a similiar situation to align face but align UV ? Please excuse my ignorance if Im talking gibberish. -
I do have plans for some UV tools, but I have some other projects lined up first.
I have done some experimenting with making UVs "sticky". -
Ag imagine Crish's Shape bender or FredoScale with sticky UV's!
What an easy thing it would be to make cool arches is no time! -
@thomthom said:
I do have plans for some UV tools, but I have some other projects lined up first.
I have done some experimenting with making UVs "sticky".Cheers ThomThom. Ill look at if Whaats UV solution wors for me in the meantime.
http://forums.sketchucation.com/viewtopic.php?f=323&t=23725&hilit=uv+mapper.Alternatively I can fix the triangles & export to Accutrans & resolve the UV there.
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I hope to make Sticky UVs into a framework that can easily be added to plugins.
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