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Sketchup--Irregular curved solid--how to do it?

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Forum topic by CharlesA posted 03-01-2015 11:03 PM 788 views 0 times favorited 20 replies Add to Favorites Watch
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CharlesA

3018 posts in 1258 days


03-01-2015 11:03 PM

Topic tags/keywords: question sketchup

I am working on a shape like this. It is curved on inside and outside, but the curves are gradual and not parallel.

I’ve been able to to come up with something close, but not quite right yet.

Two questions:
1) how would you draw it in Sketchup?
2) how would you “fix” it? Let’s say I draw it, have it 90% the way I like it, but decide I want a deeper curve in the the outside top 20% of the piece. How would I change the shape in this way?

Thanks, Charles

-- "Man is the only animal which devours his own, for I can apply no milder term to the general prey of the rich on the poor." ~Thomas Jefferson


20 replies so far

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JAAune

1634 posts in 1777 days


#1 posted 03-01-2015 11:11 PM

Use the bezier spline plugin to do curves that aren’t a simple radius. Those can be adjusted at any time after they’re initially drawn. I start with a box outlining the critical dimensions, make it a group and layout the curves over the top of that.

An alternative is to just keep doing copy/paste to the original and sketching new curves on top of the copies until one looks good. Then you delete the original line and cut and paste the new one into the original component or group.

-- See my work at http://remmertstudios.com and http://altaredesign.com

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CharlesA

3018 posts in 1258 days


#2 posted 03-01-2015 11:14 PM

Thanks. I used the bezier plug in, but I didn’t realize I could keep adjusting them. I was re-drawing each time!

-- "Man is the only animal which devours his own, for I can apply no milder term to the general prey of the rich on the poor." ~Thomas Jefferson

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JAAune

1634 posts in 1777 days


#3 posted 03-01-2015 11:53 PM

You’re welcome. Yes, it is the edit feature that makes bezier splines good. Getting a perfect curve the first time around never happens.

-- See my work at http://remmertstudios.com and http://altaredesign.com

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CharlesA

3018 posts in 1258 days


#4 posted 03-02-2015 08:09 PM

This is where I am so far. Anyone have any thoughts?

This is a baptismal font, so the bowl/basin would be on top.
I’m thinking of a three-way lap joint on the bottom brace, and the shelf for the pitcher to be either doweled to the legs or do another, thinner three way lap brace with the shelf attached to it.

(Oh, and I have one of the angles off just a hair, so the three way lap joint is not quite symmetrical).

-- "Man is the only animal which devours his own, for I can apply no milder term to the general prey of the rich on the poor." ~Thomas Jefferson

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JAAune

1634 posts in 1777 days


#5 posted 03-03-2015 12:09 AM

My first thought is to experiment with some different shapes in place of the circle between the legs. The reason being, you’ve got natural curves for the legs, a simple radius for the shelf and straight lines for the lower stretchers. The bowl will likely be curved if I guess correctly. That’s a lot of different types of shapes in one small area.

I’m betting if you played with some elliptical shapes for the shelf you’d find something striking. Another thought is to eliminate the straight stretchers at the bottom and replace them with curved stretchers that overlap in a similar manner.

Of course doing any of the above will probably increase the time spent on joinery so if time/cost is an issue, your current approach may be preferable.

Construction-wise, just be sure the shelf has strong joinery. A heavy bowl will apply leverage to that joint which will tend to force it apart.

-- See my work at http://remmertstudios.com and http://altaredesign.com

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CharlesA

3018 posts in 1258 days


#6 posted 03-03-2015 12:33 AM

Thanks. Those are all very helpful ideas.

-- "Man is the only animal which devours his own, for I can apply no milder term to the general prey of the rich on the poor." ~Thomas Jefferson

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NoThanks

798 posts in 989 days


#7 posted 03-03-2015 12:38 AM

!

-- Because I'm gone, that's why!

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CharlesA

3018 posts in 1258 days


#8 posted 03-03-2015 12:42 AM

BTW, I like the way the half lap joint becomes a Chi-Rho.

-- "Man is the only animal which devours his own, for I can apply no milder term to the general prey of the rich on the poor." ~Thomas Jefferson

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CharlesA

3018 posts in 1258 days


#9 posted 03-03-2015 01:07 AM

This would be a bit much for the shelf, right?

-- "Man is the only animal which devours his own, for I can apply no milder term to the general prey of the rich on the poor." ~Thomas Jefferson

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CharlesA

3018 posts in 1258 days


#10 posted 03-03-2015 02:20 AM

JAAune, did you mean more of a true oval shape or something more like this?

-- "Man is the only animal which devours his own, for I can apply no milder term to the general prey of the rich on the poor." ~Thomas Jefferson

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JAAune

1634 posts in 1777 days


#11 posted 03-03-2015 02:23 AM

I was thinking something like that last one.

The first drawing with the open pattern is intriguing but I believe you’re correct that it doesn’t belong to this project. You ought to file that idea away for potential use in the future.

-- See my work at http://remmertstudios.com and http://altaredesign.com

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CharlesA

3018 posts in 1258 days


#12 posted 03-03-2015 04:54 PM

I’ll end up doing this whole thing over eventually to get all the angles exactly right, but here is what I did in response to feedback.

-- "Man is the only animal which devours his own, for I can apply no milder term to the general prey of the rich on the poor." ~Thomas Jefferson

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CharlesA

3018 posts in 1258 days


#13 posted 03-04-2015 01:43 AM

Re-did the model with precise angles. It now fits together likes it’s supposed to. Any further thoughts?

-- "Man is the only animal which devours his own, for I can apply no milder term to the general prey of the rich on the poor." ~Thomas Jefferson

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JAAune

1634 posts in 1777 days


#14 posted 03-04-2015 01:45 AM

That new shelf fits the design a lot better. Do you know what the basin is going to look like?

-- See my work at http://remmertstudios.com and http://altaredesign.com

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CharlesA

3018 posts in 1258 days


#15 posted 03-04-2015 01:50 AM

No—the next step will be the bowl. Probably have glass artisan in town do it. The final design of the font will wait until the bowl is done, since it will be much easier to fit the font to the bowl than vice versa. I assume it will be translucent with colors from the windows in it.

-- "Man is the only animal which devours his own, for I can apply no milder term to the general prey of the rich on the poor." ~Thomas Jefferson

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