Make rounded rectangle with slanted top and bottom faces

[stshuting]

Hello Dave & Pilou,

Thank you both for your solutions! Yeah it's always good to have a few tricks up one's sleeves when modelling! I have tried Dave's method and it worked very well. Thank you.

I have troubles installing Fredo Scale extension... oh well... will get there.

For now, I have got my slanted rounded rectangle. And next step, I want to add a band of rounded rectangle to the top and bottom. This band is slightly bigger than the main rectangle.

I tried using Outline to get the perfect size, but I could not push/pull it up because it will be angled. The band is supposed to be raised in the same direction as the rectangle's height.

I attach screenshot to show you what I mean. Here I showed you what happened when I pull out the outlined top. Since it's already slanted, pulling it will make the new solid angled.

To show you what I want to achieve, I drew a normal rectangle, outline the top, drop down guides (20 mm in this example) in all 4 corners, manually draw the whole band with 20mm thickness. The band is coloured in blue.

It's easy with normal rectangle. But when we have a rounded one... I have no clue how to go about doing it!

Thanks in advance for your help!

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[stshuting]

Hello Pilou,

I have installed the extension FredoScale. It works perfect! This is what I want:

You see the rounded rectangular bands at the top and bottom are slanted in the right direction.

I did this:

1. Create a rounded rectangle (call it Body).

2. Use Outline to create a larger rounded rectangle (let's call it Band).

3. Pull Band & body to desired heights.

4. At the top, use Outline to create a similar Band and pull it out.

5. Use FredoScale to slant the top and bottom edges.

A quick questions please... how do I pull down the top and bottom edge to be exactly the same angle? Using the extension, I see that I can enter some sort of ratio. But I don't really know how it works?

One disadvantage I find is that after the shape is done using the extension, we cannot push/pull to modify smoothed surface (such as the top side). I tried with the side faces and it's still ok to push/pull. Well, one cannot have everything, right?

Thanks for your time helping!

Best regards,
Shu Ting

[pbacot]

Hi! Here is a way without plugins, though for convenience I did use "Mirror"at one part.
It's pretty much the same approach as Dave's.

[pilou]

If I all understand Seems i have not understood!
But you can use the same technic with variation!
Vertical Extrude by
Joint Push Pull by Fredo6 or Projection by Didier Bur

If I understand

[pbacot]

That looks like the quickest way so far Pilou!

[stshuting]

Hello Pbacot, Pilou and Dave,

Oh wow I am so amazed by your skills! I will definitely give pbacot's and pilou 's methods a go! It's always useful to learn t he manual way, as well as the plugins way.

Thank you so very much! This forum is very useful.

I wish all a merry Christmas and happy new year 2017!
SketchUp to infinity and beyond!

Best regards,
Shu Ting

[stshuting]

Hello pbacot! I tried to follow your methods, but am stuck at the 6th step. How do you make surface orange that is smaller than the base?

Thanks!

[pbacot]

Back in step 3 I offset the rounded rectangle on the end--I could then push pull it through to the other end... but I forgot for a couple steps. after the intersect faces the outer surface can be removed. the inner surface is orange because that is my back face color, I reverse it later.

So note in step five the shape is a tube with thickness like a terra-cotta chimney flue--and you should make it this way before the intersect action. Sorry it wasn't clear. It's actually fairly fast when you've got the steps worked out.

Remember that if you smooth objects, it makes rounded edges one surface which makes it easier to select to edit or erase (there's edges in steps 3-5 that are not smooth and could have been--I eventually smoothed them). Also I may select unwanted parts all at once and group to delete, which leaves you the faces you want to keep.

[stshuting]

Hello pbacot!

Oh ok! Thanks for the details procedures! I shall try them! And I didn't know that smoothing object makes it easier to edit!! Wow that's good to know!

Many thanks again. And wishing you a very happy new year and all the best for 2017!

Best regards,
Shu Ting

[pbacot]

@stshuting said:

Hello pbacot!

Oh ok! Thanks for the details procedures! I shall try them! And I didn't know that smoothing object makes it easier to edit!! Wow that's good to know!

Many thanks again. And wishing you a very happy new year and all the best for 2017!

Best regards,
Shu Ting

Makes it easier to surfaces at time, I guess I mean.