OK Steve, How the hell did you do that!! It looks lovely. I can get that in Rhino using a 2 rail sweep with tangency but not in MOI. Also, such a super smooth indentation with one surface.
Share your secrets oh master! :-)

Roger

It's a very interesting Polygonal point structure to the bottle. Interested to know how the bottle was made in MoI. :o

Hi Burr,

> It's a very interesting Polygonal point structure to the bottle.

That's actually what an exact surface of revolution looks like.

When you have an untrimmed surface of revolution, when you turn on the points for it in MoI, you will get the points for an automatically rebuilt surface instead which is more friendly for point editing than the exact one that has fully multiple knots in it. If you edit the polygonal looking point structure, you'll see that if you pull points of that structure around it kind of splits into quadrant pieces rather than staying as a single totally smooth surface.

If a surface is trimmed though, that automatic rebuilding will not take place. In this case the surface is trimmed so that's why you see that squarish polygonal point structure.

If you untrim it by selecting all of its edges and pushing delete, then you'll see the rebuilt control points appear on it instead when you turn surface points on.

- Michael

Aha. Very intersting. Never noticed that before.
Thanks

Hi Roger,

Sorry, I did not keep the construction (I am in a bad habit of deleting construction (in MOI V1), I need to get used to the fact MOI now has layers)

The main body is revolved (I made a spline from the edge/shape of the bottle, then revolved) I then cut a circular hole into the neck, copied the edge of the hole, trimmed and made blend to lines set at the top of the cutout, then trimmed away the rest of the cutout. The cutout edges where then merged.

The lip is made by Network (to make it one surface).

Hi Steve,

Thanks for that. I'm not sure I entirely follow how you got from a circular hole to the final shape but I'm going to have another stab at this and see what happens. It's amazing how you've got no cut lines across your indent surfaces. Hmmmm..

Cheers,
Roger

Hi Roger,

I picked the various construction lines from your original model.

After making the revolve I extruded a circle (I created the circle from the orientation of the lip, size from the cutout) to intercept/trim the main body.



I then copied the edge of the cutout, trimmed that new curve and made blend to lines I had created from the top of the original cutout.




I then extruded the blend curves (+ a line connecting them) and trimmed the top of the cutout.




I then selected the edges of the cutout and merged them.


- Steve

Very interesting but I still don't get it.
I think this would be a great candidate for a tutorial video.
Thanks for sharing man, your input is greatly appreciated.

Ok, I have again very interesting question, is there someking of skin on bottle or why I dont see all edges,and curves, are they suppressed?

Hi d3,

> Ok, I have again very interesting question, is there someking
> of skin on bottle or why I dont see all edges,and curves, are
> they suppressed?

Nothing is hidden as far as I can tell...

Where exactly are you expecting to see additional curves or edges?

If you have surfaces that are built in smaller pieces and joined, then you will have more edges in a model. If you have a smaller number of surfaces each of which is larger in size then you will also have less edges in a model.

Are you maybe talking about an isocurve type display? Some programs draw additional extra extracted curves in the middle of surfaces as just another way to display them. But that's kind of an old remnant from the time when everything was only displayed in wireframe instead of shaded. MoI does not draw extra isocurves and instead just focuses on showing you the surface without extra clutter drawn on top of it. But the edges of all the trimming boundaries are shown in MoI unless you have decided to hide them yourself.

- Michael

Hi Steve, I'm interested in your method also. The more you can expound the better!!! The inset tab creation from there?

Thanks

Hi BurrMan,

>>The inset tab creation from there?<<

The inset tab was made from a Network.

I created a circle from the original model. The red lines where part of the construction and left for later use.



I trimmed off the top of the circle, then used blend to blend each side of the circle and the center line to lines placed at the top of the cutout.



I then added 2 3_point_arcs (yellow curves) to help with the Network




I then joined/added trim points to create the Network, I also used the top edge of the cutout as part of the Network for the blend.

I have colored the curves to show the network:-

Aha, I missed the 3 point curves.

Thanks for sharing that.

Well I understand all that but what I don't get, is how you get the final blend between the cutout and the bottle.
It seems that from the cutout network shown you would end-up with a surface made up of four edges, while in the 3dm you provided both the bottle and the cutout have a single edge (therefore MOI can generate the blend).

Is there some way to merge edges of a networked surface which I don't know about?
I tried merging by using join but I always end up with a seperate curve.

There is a "Merge" command in MoI. Either setup a shortcut key with the command as Merge, or hit tab and type Merge.

I was curious, so decided to see if I could patch the bottle in MOI that was originally posted. The result looks OK.

>But the edges of all the trimming boundaries are shown in MoI unless you have decided to hide them yourself<
Ok, those edges was hided.

Hi Steve, Thanks for that. Well, your technique up to the network is exactly the same as mine so I'm glad I was on the right track. I didn't think to add extra lines to help the network though, that's a great idea. Also, I had no idea there was a Merge command either, so all my joined curves refused to blend nicely like yours do.
Cool, this thread has turned into a bit of a monster but I've learned a lot!

Roger

Hi Roger,

>>Also, I had no idea there was a Merge command either,<<

It does save a lot of time/work. You could get similar results without that (and in V1) but it means creating a single closed spline for cutting out the hole (making sure the start/end of the spline is at a corner point), then the lip would need to be made from a larger surface, which again would need to be trimmed with a single spline. Certainly not for the faint-hearted :-)


So where is the next model to look at :-)


- Steve

OK, I last post here ( I hope) but I just had to say how great the Merge command is! It's totally wiped out my biggest frustration with MOI, namely, not being able to do blend surfaces where the edges are split. The Merge function makes it a doddle. I've made a shortcut key and now my surfaces are blending quicker and easier than Rhino's. Yay! No more worrying about selecting edge chains or all that malarkey, just merge 'em together and blend away...

Roger