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ulfwiklund

Extrude Polygons In A Cylinder

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I desperately want help to make a smooth slot inside a cylinder. I want the slot to go all the way inside the cylinder. I don´t know how to work with the polygons, and how to delete polygons at the top. Hard to get it smooth inside a HN. I,ve tried to make the slot with boole object, but it´s not good. Please, help me...

-ulf

slot.c4d

post-131834-0-18837500-1342733606_thumb.

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Hi ulf,

It's kind of hard to picture what you're going for, but I think the key info here is how the hypernurbs does its thing and what makes good topology.

Here's a scene file. It may not be what you're going for (reference image, maybe?), but you can see how I made cuts and moved points (etc) to change the way everything worked out.

I strongly suggest spending a modest sum on hsrdelic's Vertex Pusher tutorials--very helpful for understanding these kinds of things.

Hope that helps! Let us know if you have other questions.

~Whithers

slot_0001.c4d

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Hi ulf,

It's kind of hard to picture what you're going for, but I think the key info here is how the hypernurbs does its thing and what makes good topology.

Here's a scene file. It may not be what you're going for (reference image, maybe?), but you can see how I made cuts and moved points (etc) to change the way everything worked out.

I strongly suggest spending a modest sum on hsrdelic's Vertex Pusher tutorials--very helpful for understanding these kinds of things.

Hope that helps! Let us know if you have other questions.

~Whithers

Thank you. Still wonder how I get rid of unnecessary polygons after extrusion. Attaching a ref-image (Boole).

Hi ulf,

It's kind of hard to picture what you're going for, but I think the key info here is how the hypernurbs does its thing and what makes good topology.

Here's a scene file. It may not be what you're going for (reference image, maybe?), but you can see how I made cuts and moved points (etc) to change the way everything worked out.

I strongly suggest spending a modest sum on hsrdelic's Vertex Pusher tutorials--very helpful for understanding these kinds of things.

Hope that helps! Let us know if you have other questions.

~Whithers

Thank you. Still wonder how I get rid of unnecessary polygons after extrusion. Attaching a ref-image (Boole).

post-131834-0-89870400-1342777246_thumb.

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post-74060-0-60941000-1342784993_thumb.p

If this is what you are looking for, I wouldn't extrude it at all (at least not that part) I'd:

1. Create a cylinder without caps and then make it editable.

2. Close the Polygon hole on one end. (This will create a "can")

3. Select all the Polygons and extrude them to give the "can" some thickness (Extrude it twice so you get a subdivision in the top )

post-74060-0-25847100-1342785651_thumb.p

4. Delete the polygons on the top & inside where you want the cutout....

post-74060-0-03714200-1342785710_thumb.p

5. Select the EDGE on the bottom of this area and extrude it back into the can to create your base for the cutout (You need the edge & points for the next step)

post-74060-0-78088300-1342785822_thumb.p

6. Then, using the bridge tool connect each of the 3 sets of top & bottom edges of this region.

post-74060-0-99090000-1342785857_thumb.p

This isn't very efficient I suppose if you have a lot of sections to do, but works well for one or two.

Hope it helps.

R

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I strongly suggest spending a modest sum on hsrdelic's Vertex Pusher tutorials--very helpful for understanding these kinds of things.

I second this, I am going through Vol. 1 right now and it has helped me a ton to understand how to get through things I could not before and also what I was not doing right, highly recommend you check these tutorials out.

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I second this, I am going through Vol. 1 right now and it has helped me a ton to understand how to get through things I could not before and also what I was not doing right, highly recommend you check these tutorials out.

I´m doing the same thing, and I strongly agree with you. It´s great lessons.

-ulf

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Thank you, existe. I want to have 4 slot/rails (my english could also be better) for inner walls who can slip down in to my cylinder. Therefore I have to make new edges. I´ve tried to bevel the axis centre edges into 2 new. That makes some messy geometry. It´s also difficult for me to know how to delete polygons so I get nice and sharp rails in a HN, without adding that may cuts. Another question is how I shall cut in order to get it right in the HN. If I loop cut, I´ll get deformed geometry on the outer side of the cylinder. If i line cut, I´ll get disturbing n-gons. Suggestions? Solutions?

-ulf

post-131834-0-05959900-1342938942_thumb.

rail.c4d

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Why not build the inside surface as a separate object, complete with the slots, which you will later combine with the exterior into a single object? OK the caps won't be there but you will be able to create these afterwards with the Bridge tool or Stitch and Sew.

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Why not build the inside surface as a separate object, complete with the slots, which you will later combine with the exterior into a single object? OK the caps won't be there but you will be able to create these afterwards with the Bridge tool or Stitch and Sew.

Thanks. I will try that. Probably you will hear from me again. By the way, makes me happy to hear your scottish accent. Went to Glasgow a couple of years ago. T´was raining every day. One early morning I was running under a bridge with a swedish flag on my wet cap, when an excited old man stopped me and thought I was Henrik Larsson. Wonderful city.

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Made this from a disc. Thougt I do as you suggested, delete the old border and bridge this one to the cylinder. Did a 0-extrude and moved it up with bottom cap. Line cuts and repositioning points. But when I do loop cuts in order to shape it up in the HN, it gets really messy. How shall I do it? Close to despair.

-ulf

new wall.c4d

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Naughty naughty. You're using R13 not R11 as in your profile. You should update your profile so that people know how best to answer. When I made the video earlier I deliberately used my old R11.5 so the tools would be appropriate and you would be able to open the scenefile.

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Naughty naughty. You're using R13 not R11 as in your profile. You should update your profile so that people know how best to answer. When I made the video earlier I deliberately used my old R11.5 so the tools would be appropriate and you would be able to open the scenefile.

Sorry. Just updated both version and now my settings.

-ulf

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