| Inner Hull [message #80248] |
Fri, 18 May 2012 08:22 |
Ayla P
Messages: 3
Registered: May 2012
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Junior Member |
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Hi all,
I'm hoping someone might have some insight into this problem i'm
trying to solve. Hopefully I can make my questions coherent!
The intent is pretty simple: I have a bunch of points that make up a
sphere, and I want to calculate the volume of the sphere.
The points are random and aren't in a single line that makes an edge,
so I want to see how much the the volume of the sphere changes if I
make a hull using the outer-side of the "rim" (outermost pixels)
versus using the inner-side of the it (not all the interior pixels,
but those that basically make up the inner side of the rim). I've made
a convex hull around the outer pixels, but now I basically want to
make an inner hull.
Would it be possible to place the inner pixels on the outside and the
outer pixels on the inside then just retrace a convex hull and then re-
place the pixels into their original positions? If so, does anyone
have a suggestion of how to do this? If not, does anyone have an
alternative suggestion for how to get the inner hull?
Thanks so much for the help!
Ayla
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