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Slice one object using another object

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David HallSlice one object using another object
by on Dec 21, 2014 at 12:55:00 am

So basically I would like to be able to "use an object as my knife." Is that possible?

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I want to "slice" one object using another. I want to cut edges or polygons. And I would like the cuts to occur where the objects intersect.

I would use a boolean, but I'm not trying to subtract or add or intersect, I'm just trying to cut edges or add points.

I found the following topic, I did find the "spline cut script" nice and useful, but now what I am trying to do can't be done with splines.

http://www.c4dcafe.com/ipb/topic/74084-knife-cut-using-projected-spline/

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Here is what I am working on specifically. I want to remove the protruding part of this cube from this 3d logo.
http://puu.sh/dCWXq/6ee3c9fff0.jpg


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But in general, it would be nice just to "make cuts (one one object) along the intersection" of another object.

For example turn this http://puu.sh/dCZm0/d959d1426a.png into this http://puu.sh/dCZtV/172538caad.png.


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Adam TrachtenbergRe: Slice one object using another object
by on Dec 21, 2014 at 5:37:01 pm

You can get that effect by using two Booleans of the same objects: one set to A intersect B and the other set to A without B.

Example: 8316_booles2x.c4d.zip


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David HallRe: Slice one object using another object
by on Dec 21, 2014 at 10:28:21 pm

Thanks Adam. That is not exactly what I was looking for, I was looking to "chop the cube" not the text. But the ideas is correct. And that is a clever way to do it. So thank you much.

Now if I use that method, then I do end up with "inside geometry" correct?

So either I would need to clean the inside of the object up and then optimize, if I wanted to say use a subdivision surface on this geometry later. Or I would be left wit extra geometry on the inside.


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