Drawing curves in two planes

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modernist
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Drawing curves in two planes

Postby modernist » Sun Mar 03, 2013 8:57 pm

Viz the rails on my current coffee table project (BM61). What is the best way to draw a curve on one edge of a coved rail.

Image

In the end I drew the cove on the rail first then a separate block with a curve on top. I moved the block into position then intersected with model and deleted the block to leave the double curve. Have I missed something?
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Brian


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Re: Drawing curves in two planes

Postby jake » Sun Mar 03, 2013 9:05 pm

modernist wrote:Viz the rails on my current coffee table project (BM61). What is the best way to draw a curve on one edge of a coved rail.

Image

In the end I drew the cove on the rail first then a separate block with a curve on top. I moved the block into position then intersected with model and deleted the block to leave the double curve. Have I missed something?


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Re: Drawing curves in two planes

Postby modernist » Sun Mar 03, 2013 9:27 pm

Jake, if you mean draw the lower curve first then the cove at the large end I don't think follow me (along the upper cove line) would work as the section tapers along the length. (but I may be wrong), I'll try it.
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Brian


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Re: Drawing curves in two planes

Postby jake » Sun Mar 03, 2013 10:03 pm

modernist wrote:Jake, if you mean draw the lower curve first then the cove at the large end I don't think follow me (along the upper cove line) would work as the section tapers along the length. (but I may be wrong), I'll try it.


What I meant was (plus a bit more thought) - draw the curvy line at the top of the cove on a square piece of "timber" a bit bigger than enough to produce the finished item. Draw the profile on the end section and follow me along the line. Push the waste underneath to vanishing point. I am a mere bludgeoner at this stuff though.

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Re: Drawing curves in two planes

Postby modernist » Sun Mar 03, 2013 10:09 pm

jake wrote:
modernist wrote:Jake, if you mean draw the lower curve first then the cove at the large end I don't think follow me (along the upper cove line) would work as the section tapers along the length. (but I may be wrong), I'll try it.


What I meant was (plus a bit more thought) - draw the curvy line at the top of the cove on a square piece of "timber" a bit bigger than enough to produce the finished item. Draw the profile on the end section and follow me along the line. Push the waste underneath to vanishing point. I am a mere bludgeoner at this stuff though.


Me too. AFAICS that would work but would give you a cove following the lower curve not the straight top. That may even be a better feature - further experiment required.

Good job we now have a forum to discuss these things!
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Brian


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Re: Drawing curves in two planes

Postby cncpaul » Sun Mar 03, 2013 10:28 pm

Brian,

Like this ?
Attachments
Ashampoo_Snap_2013.03.03_23h32m48s_001_.jpg
Ashampoo_Snap_2013.03.03_23h32m48s_001_.jpg (13.75 KiB) Viewed 4334 times
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Re: Drawing curves in two planes

Postby modernist » Sun Mar 03, 2013 10:41 pm

cncpaul wrote:Brian,

Like this ?


Yes, but I need some kip before commenting further :lol:

Night.
Cheers

Brian


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Re: Drawing curves in two planes

Postby modernist » Mon Mar 04, 2013 1:52 pm

It doesn't work!

Initial block marked out

Image

Lower curve extruded away

Image

Ready to Follow Me along the straigt line at the top of the curve


This is what you get

Image
Image
Image
Cheers

Brian


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Re: Drawing curves in two planes

Postby nickw » Mon Mar 04, 2013 2:07 pm

Select All.
Right Click>Intersect Faces>With Selection.
Delete the bits you don't want.

Simples.
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Re: Drawing curves in two planes

Postby modernist » Mon Mar 04, 2013 8:22 pm

Got it thanks

Image
Cheers

Brian


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Re: Drawing curves in two planes

Postby mark270981 » Mon Mar 04, 2013 8:24 pm

How did you create the curve in the first place?
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Re: Drawing curves in two planes

Postby modernist » Mon Mar 04, 2013 8:25 pm

mark270981 wrote:How did you create the curve in the first place?


Which one?
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Re: Drawing curves in two planes

Postby mark270981 » Mon Mar 04, 2013 8:26 pm

The first one, then the second I'm great at square stuff not curves though
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Re: Drawing curves in two planes

Postby modernist » Mon Mar 04, 2013 8:29 pm

mark270981 wrote:The first one, then the second I'm great at square stuff not curves though


Using the arc tool click on the non-tangential end of the curve then the other end then slide the curser along the straight line which borders the tangent until it turns blue (tangential) then click.
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Re: Drawing curves in two planes

Postby nickw » Mon Mar 04, 2013 8:45 pm

Good, now you can erase the line on the top face (it's not needed) and ctrl-erase (soften) the line across the face on the rhs.
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Re: Drawing curves in two planes

Postby modernist » Mon Mar 04, 2013 8:57 pm

Getting better

Image

Cheers Nick, I hope other people find this as useful as I am.

I think it is probably easier to make than draw but it is nice to be able to play about with proportions and get a view of the finished item. No doubt singin' dude will approve :lol:
Cheers

Brian


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Re: Drawing curves in two planes

Postby Pinch » Wed Mar 06, 2013 6:54 am

I'm assuming this is using SketchUp?? :?

I did download the programme a while ago and have had a wee peek at it. It looks great! But every time I design, I automatically go to the drawing board - in fact, I was on it yesterday late afternoon. I guess I need to find the time to explore sketchup and get familiar with its utilities etc...

How long have you guys spent on it before getting reasonably efficient and competent?

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Re: Drawing curves in two planes

Postby modernist » Wed Mar 06, 2013 7:32 am

Pinch wrote:I'm assuming this is using SketchUp?? :?

I did download the programme a while ago and have had a wee peek at it. It looks great! But every time I design, I automatically go to the drawing board - in fact, I was on it yesterday late afternoon. I guess I need to find the time to explore sketchup and get familiar with its utilities etc...

How long have you guys spent on it before getting reasonably efficient and competent?


I don't think I'm efficient or competent by any means but I having played around with SU for a while decided it was so good I should make an effort to learn it properly. I find the best way of doing that is to use it for a project and learn what you need as you go along hence this thread. Like you I came from a drawing board via CAD but you need to think differently for SU. Most things start with an end or side elevation and are then extruded so the first decision is which elevation to draw to make the extrusion easy. The next key issue is make each piece into a component which can then be stored and called up/copied, rotated etc as required. If you don't when you put two pieces together they mould into one and you can't then change them separately.
Cheers

Brian


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Re: Drawing curves in two planes

Postby tusses » Wed Mar 06, 2013 7:40 am

good stuff !

I might have another look at SU, now we have somewhere to ask newbie questions :)


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