Forum: Poser - OFFICIAL


Subject: Dynamic cloth - the cloth room For Compleat Dummies

RobynsVeil opened this issue on Dec 03, 2010 ยท 409 posts


aRtBee posted Thu, 09 December 2010 at 5:19 AM

Can Air Resistance really be zeroed out?

yes, just type 0 in the field. I incorrectly took the edge distortions (see nexts posts) for air stream / turbulence effects without further investigations, and perhaps there were some mishaps in my original measurements. So, to bagginsbill, sorry for this and thanks for your remarks.

Resizing the cloth did not change the previous results. This does not say much, as an increased surface also will give an increased mass, and effects of air are made by the ratio of damping over density. twice the mass and twice the damping will give a same result.

So I brought down density from 1 to 0.01 and then to 0.0001. It made no difference, same drop-down positions, speeds and so on. So, when you set air damping to 0, there is no additional residue distorting the results.

Air damping is proportional to atmospheric density, and to the relative speed of the cloth to the air, perpendicular to the cloth. You can move the air by using wind generators, and you can move the cloth by animation. By reducing air damping you can make the cloth move as on the moon, or in vacuum (nice for poser testing). By raising the damping you can make the cloth move like under water, or like on Jupiter. My totally unsupported current wild guess it that Cloth Room has an atmospheric density of 1 atmosphere, as on the Earth surface at sea level. I'll have to find out.

The catch is this: for proper Moon or Jupiter scenes you've got to alter Cloth Room gravity too. No way to do that, at the moment. A similar thing holds for under water scenes, as water provides an extra upward force proportional to the volume of he object. Food for thought.

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Usually I'm wrong. But to be effective and efficient, I don't need to be correct or accurate.

visit www.aRtBeeWeb.nl (works) or Missing Manuals (tutorials & reviews) - both need an update though