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Author Topic: Default spheres looking more like ovals?  (Read 8290 times)

ENSONIQ5

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Re: Default spheres looking more like ovals?
« Reply #30 on: October 15, 2014, 07:16:50 am »

I kinda wish there was a feature in anim8or to manually edit each and every individual vertices UV coordinate. It would make fixing these things by hand much easier.

There is now.  In vertex edit mode, click a face (or faces) and click the UV button to individually adjust the UV mapping for the selection only.
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CrashDrive

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Re: Default spheres looking more like ovals?
« Reply #31 on: October 15, 2014, 08:23:02 am »

Raxx, you have created the closest yet. There is still a minute spherical variance, (very minute) and
the poles still show slight visible creases, but you made a definite improvement. 
The heavy weight sphere I created (in Blender) has no visible creases and no spherical variation whatsoever.
The LON and LAT divisions in Anim8or are very limited, so I can't create the same sphere in Anim8or.

Anyhow, Ive managed with what we've got so far and I don't see that changing any time soon. :) 
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cooldude234

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Re: Default spheres looking more like ovals?
« Reply #32 on: October 15, 2014, 09:09:58 am »

There is now.  In vertex edit mode, click a face (or faces) and click the UV button to individually adjust the UV mapping for the selection only.
Just checked, and there isn't.
And I just realized you said faces. Obviously you misunderstood what I said :P I want to edit the UV coordinate of the INDIVIDUAL vertex and not the face (which is 3 or more vertices).
That way you could easily set the exact texture locations that you need, instead of having to guess where things are freehandedly and be stuck with only one projection type per mesh!
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ENSONIQ5

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Re: Default spheres looking more like ovals?
« Reply #33 on: October 15, 2014, 09:22:25 am »

Aha, yep, my bad cooldude234, I did indeed misunderstand.  To be honest I don't really do much UV mapping in Anim8or, I generally map everything in Lithunwrap since I use Anim8or mainly as a modeller and import everything into Carrara which tends to mess up the standard Anim8or mapping.
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ronaldefarmer

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Re: Default spheres looking more like ovals?
« Reply #34 on: October 15, 2014, 05:20:19 pm »

Raxx: I can see how your Spherize script could be useful for more than just fixing imperfect spheres. Would it be possible to make this script work like Anim8or's built-in tools so that you can click a button, then adjust the Spherize attribute by dragging? This is a great script.
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Raxx

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Re: Default spheres looking more like ovals?
« Reply #35 on: October 15, 2014, 08:10:13 pm »

cooldude234, there's always my super awesome UVTools scripts :P Anyway, I was addressing the OP issue of non-uniform sphere geometry.

I thought maybe it'd be nice if one could subdivide a cube, adjust it to be perfectly spherical (using my script), and use a cube map for texturing the sphere. I gave it a shot, but there's UV distortion at the edges since the faces aren't all identical in size and shape, and seams :(


ronaldefarmer, can you share that icosphere you posted, but as a .obj so that I can check out its UVs? I might write an icosphere script of my own with unlimited divisions, but only if I can get a logical UV pattern for it. As for the spherize script, I was considering that, and since you're requesting it, I guess I'll make it ;) Expect something posted in the scripts board in the near future.
« Last Edit: October 15, 2014, 08:11:10 pm by Raxx »
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ronaldefarmer

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Re: Default spheres looking more like ovals?
« Reply #36 on: October 15, 2014, 11:33:57 pm »

Raxx: Here is that icosphere, and also a quadsphere in case you are interested.

About your spherize script, What if the spherize attribute could have a negative value. I used the script to "fatten" a cube (so that the sides were convex) using values less than one, and I am wondering if it might be possible for the attribute to have negative values so that the sides would be concave.
« Last Edit: October 16, 2014, 12:07:46 am by ronaldefarmer »
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CrashDrive

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Re: Default spheres looking more like ovals?
« Reply #37 on: October 16, 2014, 03:54:07 am »

I never realized the default sphere had creases at the poles after subdivision.

Been playing around with the Spherize script a bit more.
Started with a cube and subdivided> mesh> Spherize (twice) and got a perfect sphere and no visible creases.
The script really works nice.

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cooldude234

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Re: Default spheres looking more like ovals?
« Reply #38 on: October 16, 2014, 05:22:38 am »

Raxx I really like your Cube mapping method. It looks much better than anim8or's default spherical mapping.
I might look into this some more and make a simple standalone tool in C++ to fix this problem for now at least.
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Kyle

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Re: Default spheres looking more like ovals?
« Reply #39 on: October 19, 2014, 11:40:56 pm »

Sounds like a nice script Raxx. I cant seem to get it to work for some reason though. I load the script, even restarted anim8or, select a mesh hit sphereize but see no effect.  Tried it after a subdivision as well.
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Raxx

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Re: Default spheres looking more like ovals?
« Reply #40 on: October 20, 2014, 01:14:06 am »

Hi Kyle, are there any errors in the console window? Also, it doesn't work on subdivision meshes themselves, as of yet. I'm almost done with the advanced spherize script and will have it posted shortly.

[update] Posted in the ASL Scripts board.
« Last Edit: October 20, 2014, 05:30:40 am by Raxx »
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Kyle

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Re: Default spheres looking more like ovals?
« Reply #41 on: October 20, 2014, 06:29:54 am »

Think I got it. I guess I wasn't subdividing before hand. Seems promising. Looking forward to any improvements. Keep it up!
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