help solid construction special

[poldo]

Hi, I need help.
look at this foto, there are 3 pots, avoid the one in the foreground, look at those behind.

I have to build a solid similar to that, so a kind of tubular to elliptical section that starts from the ground with a certain section, which at half height stretches (only on the 2 vertices, not on all 4, otherwise it would be a "scale" of the section), and then ends at the top with the same starting section.
nothing complicated here.
But now I have to pierce him in the middle.
the hole that I have to do resumes that re-entry as soon as you see in the vase in photography (that, activating the points of control is realized), only that I have to re-enter it until the solid "hole" in the center with a passing hole.
the hole should not be a simple round hole but, like a cut in a canvas, or imagine taking long hair collected in the hands, and then split them into 2 locks.
Did I give the idea? I hope so.

How can I do that?
with the loft I can do it but then I can't make the central cut done well.

 

[Sasso SP]

Hi, I need help.
look at this foto, there are 3 pots, avoid the one in the foreground, look at those behind.

I have to build a solid similar to that, so a kind of tubular to elliptical section that starts from the ground with a certain section, which at half height stretches (only on the 2 vertices, not on all 4, otherwise it would be a "scale" of the section), and then ends at the top with the same starting section.
nothing complicated here.
But now I have to pierce him in the middle.
the hole that I have to do resumes that re-entry as soon as you see in the vase in photography (that, activating the points of control is realized), only that I have to re-enter it until the solid "hole" in the center with a passing hole.
the hole should not be a simple round hole but, like a cut in a canvas, or imagine taking long hair collected in the hands, and then split them into 2 locks.
Did I give the idea? I hope so.

How can I do that?
with the loft I can do it but then I can't make the central cut done well.

Hello, cuff,
create the solid without the re-entry, then create the surfaces for the re-entry in such a way as to be able to connect the surfaces to form a solid, of course the surfaces to form the second solid will be different from those of the photo because they will have to be able to create the crack, after doing a boolean subtraction.
Hi.

 

[poldo]

mmm, but it's the junction between the two that leaves me puzzled.
In this case it would form a edge, I could play with the internal hole superphiles but it is difficult to make them perfectly smooth with the external surface.
also using solids-collect edges-agreement blend, I would not have a perfect continuity, above and below the inner ellipse, that of the slot.

 

[mariuss.r]

mmm, but it's the junction between the two that leaves me puzzled.
In this case it would form a edge, I could play with the internal hole superphiles but it is difficult to make them perfectly smooth with the external surface.
also using solids-collect edges-agreement blend, I would not have a perfect continuity, above and below the inner ellipse, that of the slot.

use the blend surfaces, which can have g1 g2 etc., to collect the edge.
then as the last "join" operation of all surfaces to get solid.
You get the inside cavity by subtracting one solid to another.

nb in case of constant thicknesses, you will need to make an offset of the surfaces and build the solid of the internal cavity.

rhino v5 already has the necessary commands to get the solid shelling.


see image and model

 

[giovanni.a]

I did as mariuss suggests: I created a vertical axis and at the two extremes I traced the circumferences; half instead I traced an ellipse and then got the surface of the vase through sweep 1 binary (axis); so I traced a small ellipse on the front view, in axis to the empty surface that I closed with "solidi>chiudi flat holes", to create me the bases; I then traced a new bigger ellipse, with which I cut from the front view the surface of the solid. from the right view I then cut half the solid (which was no longer such as perforated. I eliminated the upper cap, leaving the bottom. I then used "flat blend surfaces" between the edge of the hole on the surface and the small ellipse on the axis to create the hole surface on the vase. I then performed the offset of the surfaces and cut them mutually to obtain the inner bottom of the vase. for the upper edge I used 2 rail sweeps. I eventually copied specular and joined it through "solid creation".
the proportions are not those of the photo, but the result should be what you are looking for.
I try to attach an image (I hope I can, because I never did).

Bye.