How thick is a hollow object?
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Carefree Doolittle
Registered User
Join date: 25 Nov 2005
Posts: 16
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01-24-2006 18:18
Is there a formula to determine how thick an object is? ie.. a circle at 95% hollow or at 80% hollow.
If it helps I want to automate object building -- some prims "pop" out of a box, dance around a little before settling into their final shape - a house a vehicle, whatever. Even though the'll be nonphysical and CAN overlap, I'd rather they not since the whole purpose of the project is the apeareance.
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Phoenix Psaltery
Ninja Wizard
Join date: 25 Feb 2005
Posts: 2,599
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01-24-2006 18:48
From: Carefree Doolittle Is there a formula to determine how thick an object is? ie.. a circle at 95% hollow or at 80% hollow. Well, I would say that it is going to depend on the dimensions of the object to begin with. If you have a 10m cube, and you make it 80% hollow, I would expect that the hollow space would be 8m in size, and each side would be 1m thick, for example. It's going to be proportionate. Anyone know if I'm in the ballpark here? P2 |
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Seifert Surface
Mathematician
Join date: 14 Jun 2005
Posts: 912
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01-24-2006 19:09
From: Phoenix Psaltery Well, I would say that it is going to depend on the dimensions of the object to begin with.
If you have a 10m cube, and you make it 80% hollow, I would expect that the hollow space would be 8m in size, and each side would be 1m thick, for example. It's going to be proportionate.
Anyone know if I'm in the ballpark here?
P2 Yes, this is correct. I've looked into things like hole sizes, taper and so on for tori, and they all follow proportional relationships like this.
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Cottonteil Muromachi
Abominable
Join date: 2 Mar 2005
Posts: 1,071
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01-24-2006 20:33
What I'm more curious about is, how the hollowness helps with automating object building? Just interested to know. Maybe Carefree can explain in more detail.
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Carefree Doolittle
Registered User
Join date: 25 Nov 2005
Posts: 16
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I feel a little stupid.
01-25-2006 10:39
Yeah, a 10m object that is 90% hollow would HAVE to leave 1m. The description I used when I was asking for the formula WAS the formula. Thank you, sometimes you just don't see things that are too close.
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Oasis Perun
Registered User
Join date: 2 Oct 2005
Posts: 128
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01-25-2006 10:51
From: Carefree Doolittle Yeah, a 10m object that is 90% hollow would HAVE to leave 1m. The description I used when I was asking for the formula WAS the formula. Thank you, sometimes you just don't see things that are too close. wouldnt a 90% hollow 10m object would actually be .5 thick (half of the difference in hollow diameter and the full diameter) |
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Chosen Few
Alpha Channel Slave
Join date: 16 Jan 2004
Posts: 7,496
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01-25-2006 11:16
From: Oasis Perun wouldnt a 90% hollow 10m object would actually be .5 thick (half of the difference in hollow diameter and the full diameter) Yes.
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Lora Morgan
Puts the "eek" in "geek"
Join date: 19 Mar 2004
Posts: 779
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01-25-2006 13:58
That's a good thing to know when trying to match non-hollow prims to hollow ones, such as making the corner of a building a hollow cube match up with solid cubes. Knowing the percentage and width you can easily set the thickness of the solid wall prims.
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Amber Giugiaro
Registered User
Join date: 22 Dec 2005
Posts: 3
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01-28-2006 05:24
Well, that is only true in situations where the original object has 10m dimensions on each side. A sphere that has been stretched into an ellipsoid will require more complicated math to determine the thickness at any point on its surface, as the 90% applies to the shape at each point, not ".5m across the entire surface." Ergo, the 'ends' of a stretched sphere will be thicker than the 'sides'. The same goes for any other shape that has been stretched.
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