Transition from lozenge to circle along arc  Topic is solved

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Transition from lozenge to circle along arc

Postby cthawkinson » Mon Mar 23, 2020 5:28 am

Good evening all,

This is my first post here, even though I have used this forum often to answer questions that have come up as I have use Sketchup. I have run into an issue which I haven't been able to solve on my own, so hopefully someone here can help.

I am trying to connect a hollow cylinder which is lozenge shaped to a hollow cone which is circular. This connecting piece will transition from the lozenge to the cone via an arc.

Here is what I have done so far:

  1. I made a circle matching the diameter of my cone and hollowed it out.
  2. I made another circle matching the diameter of the lozenge and hollowed it out.
  3. I drew an arc connecting the inside and outside of my two circles.
  4. I used the Follow Me tool to draw the arced cylinder.

That all worked great, as I had my cylinder. You can see this in the attached SU Make 2017 lozenge to circle along arc.png. I made the green cylinder as described above, which connects to the gray cone on the right and the purple/yellow lozenge on the left.

Now I have my cylinder, wanted to transform the wider end into a lozenge using some tips I found at in this forum topic:

viewtopic.php?f=79&t=43234

In spite of the good instructions in this topic, I am not getting the desired results. Instead of transition the cylinder along its entire length, it will only do so in the first segment, or I end up with lozenges at both ends instead of just one.

Do any of you have any thoughts as to what I am missing? I have also uploaded a Sketchup Make 2017 file of the model (SU Make 2017 lozenge to circle along arc.skp) if anyone wants to take a look at that. If you do, please note that I separated each piece by 5mm eliminate z-fighting.

Thanks in advance for taking a look at this.

Chris
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Re: Transition from lozenge to circle along arc  Topic is solved

Postby pilou » Mon Mar 23, 2020 9:24 am

a brute method :) Thx Fredo6 and its versatile Curviloft :fro:

Kill surfaces and segments for keep only circular curves

you can make the same with other if you want truncated conic volumes



Funny i have made a conic form few days ago for the free Simlab Composer Lite :) (max 1920 *1080)
(geometric caterpilar curves + spheres )
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Re: Transition from lozenge to circle along arc

Postby cthawkinson » Mon Mar 23, 2020 6:38 pm

pilou wrote:a brute method :) Thx Fredo6 and its versatile Curviloft :fro:

Kill surfaces and segments for keep only circular curves

you can make the same with other if you want truncated conic volumes



Funny i have made a conic form few days ago for the free Simlab Composer Lite :) (max 1920 *1080)
(geometric caterpilar curves + spheres )


Thanks! I used the Skinning tool and that did exactly what I wanted; creating a surface along the arcs I created to get a smooth transition from the lozenge to the circle.

Thanks so much for helping out. I am not back on track!
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