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Author Topic: Default spheres looking more like ovals?  (Read 7734 times)

Kyle

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Default spheres looking more like ovals?
« on: September 14, 2014, 02:37:42 am »

Hope I'm explaining this right but I just noticed something at random and was wondering this has always been the case.  A sphere should be a perfect sphere shouldn't it? When I make a sphere, regardless of how many divisions I put in it or how many times I subdivide, it doesn't look perfectly circular.   I can go to the top view and rotate it on the Z axis and it looks fine, the outline stays consistent at any degree I turn it, yet if I go to the front, left, or right view and rotate it along the same axis I see that the height is longer than its width.  Is that normal?

I can post screens if needed.
« Last Edit: September 14, 2014, 02:41:31 am by Kyle »
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ronaldefarmer

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Re: Default spheres looking more like ovals?
« Reply #1 on: September 14, 2014, 02:51:04 am »

Hi Kyle,

Try this sphere. Just put it in your plug-in folder and restart Anim8or. You should then be able to find it on the plug-in toolbar.
« Last Edit: September 15, 2014, 04:46:40 am by ronaldefarmer »
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Kyle

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Re: Default spheres looking more like ovals?
« Reply #2 on: September 14, 2014, 04:10:13 am »

That's one way to do it. Though this topology would make it more difficult to work from for certain things. I get the point, it helps make the surface smoother.

I just find it strange if the dimensions of the built in primitive has been wrong all these years.

Is there a plug in like this somewhere that uses square faces instead?
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CrashDrive

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Re: Default spheres looking more like ovals?
« Reply #3 on: September 14, 2014, 04:42:48 am »

Yup. It's height is greater for me too. Imported one from  V97 and same. Imported one
from a different program and it was perfect all sides. So the ruler is accurate at least.
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jwalt

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Re: Default spheres looking more like ovals?
« Reply #4 on: September 14, 2014, 01:13:38 pm »

Got me curious enough to take a look, and the default sphere seems fine on my system. Just a passing comment.
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ronaldefarmer

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Re: Default spheres looking more like ovals?
« Reply #5 on: September 14, 2014, 01:21:50 pm »

The problem that I have with the default sphere is that textures are always distorted near the axis. But I see what you mean about the topology.
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Kyle

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Re: Default spheres looking more like ovals?
« Reply #6 on: September 14, 2014, 08:00:28 pm »

Got me curious enough to take a look, and the default sphere seems fine on my system. Just a passing comment.
Maybe you should upload one so one of us can take a look. I can't imagine a sphere made on yours looks fine but not on ours.
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ronaldefarmer

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Re: Default spheres looking more like ovals?
« Reply #7 on: September 14, 2014, 09:13:36 pm »

Kyle,

Here is another sphere plugin similar to Anim8or's default sphere. It is a Blender sphere. I'm not really sure it is better than Anim8or's sphere. Give it a try.
« Last Edit: September 15, 2014, 04:47:58 am by ronaldefarmer »
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ronaldefarmer

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Re: Default spheres looking more like ovals?
« Reply #8 on: September 14, 2014, 10:30:46 pm »

I was just checking out Anim8or's native sphere plugin using the new CAD ruler. I see that in front view, the "Y" dimension measures a bit longer than "X" when there is an odd number of latitude divisions simply because the ruler measures from face to face in "X", and point to point in "Y." As you would expect, a sphere with an even number of latitude divisions measures the same in "X" as in "Y." The plugin seems to work correctly, for me at least.


The reason I don't ordinarily use these spheres is because they look odd near the poles when subdivided, especially when textures are applied.
« Last Edit: September 14, 2014, 11:02:11 pm by ronaldefarmer »
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jwalt

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Re: Default spheres looking more like ovals?
« Reply #9 on: September 14, 2014, 11:10:11 pm »

Maybe you should upload one so one of us can take a look. I can't imagine a sphere made on yours looks fine but not on ours.

I hadn't realized you folks were talking about textured spheres, so my comment is worthless. I'll have to pay more attention. Probably has something to do with those pesky triangles near the poles.  ;-)
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Kyle

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Re: Default spheres looking more like ovals?
« Reply #10 on: September 14, 2014, 11:32:41 pm »

The other plugin seems to create a perfect sphere on my end. Though it doesn't completely replace the built in one for two reasons: one, it doesn't allow me to change the divisions that I can tell, and two, at least in the beta the center axis seems off somehow. It rotates fine until I let go, then its coords completely change for no reason. But again that could be a bug in the beta.

I hadn't realized you folks were talking about textured spheres, so my comment is worthless. I'll have to pay more attention. Probably has something to do with those pesky triangles near the poles.  ;-)
Textured or untextured, it shouldn't matter.
« Last Edit: September 14, 2014, 11:58:58 pm by Kyle »
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ronaldefarmer

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Re: Default spheres looking more like ovals?
« Reply #11 on: September 14, 2014, 11:40:34 pm »

Here is a plugin for a blender quad sphere if you are interested. I particularly like this one.
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jwalt

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Re: Default spheres looking more like ovals?
« Reply #12 on: September 15, 2014, 12:00:05 am »


 Textured or untextured, it shouldn't matter.


I subdivided (smoothed), and now see what you are talking about. I hadn't noticed this before.
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Kyle

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Re: Default spheres looking more like ovals?
« Reply #13 on: September 15, 2014, 12:12:08 am »

Here is a plugin for a blender quad sphere if you are interested. I particularly like this one.
That's an interesting one for sure. Probably one of the more useful ones Ive seen so far.

Still hoping to find a good replacement for the built in tool though.
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cooldude234

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Re: Default spheres looking more like ovals?
« Reply #14 on: September 15, 2014, 12:26:48 am »

Yea maybe Steve will look into fixing it. At least fix the UV coordinates for the Geodesic spheres, that way I could have a planet without its attic caps looking like a swirly ice cream cone :P
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