Pregnancy avoidance

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Pregnancy avoidance

Postby rv1974 » Sun Jun 20, 2010 10:02 am

There's some strange feature (personally I'd call it a bug)- moving the arc\curve endpoint in Z direction distorts the plan view (alters the radius value).
Is some some tool or ruby that would make the curves keep original plan view.
On the picture:
1 The Original geometry- red AB arc
2 Movin B to B1 causes blue\green pregnancy (depends on arc\curve)
3 The Yellow one is what really I need.
Thank you in advance
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Re: Pregnancy avoidance

Postby remus » Sun Jun 20, 2010 10:38 am

i think the easiest thing to do would be to use Fred06's tools on surface plugin to draw the yellow line on then clean up the remaining geometry.
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Re: Pregnancy avoidance

Postby rv1974 » Sun Jun 20, 2010 11:27 am

Yes I know. But it's too complicated to build additional surfaces and then clean it.
All I want is to move vertex in distortion free mode .
+ Fredos plugin is not always work smooth to me:
http://screencast.com/t/M2Q1NTMzZWUt
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Re: Pregnancy avoidance

Postby remus » Sun Jun 20, 2010 11:40 am

Well i think your best option is to do it manually, it'll probably be easier than you think...
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Re: Pregnancy avoidance

Postby Chris Fullmer » Sun Jun 20, 2010 5:10 pm

Try exploding the arc (right click on it and choose explode arc) before moving its vertices. That might help,

Chris
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Re: Pregnancy avoidance

Postby rv1974 » Sun Jun 20, 2010 5:30 pm

Chris Fullmer wrote:Try exploding the arc (right click on it an dchoose explode arc) before moving its vertices. That might help,

Chris

The blue one is the explode+weld inheritor.
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Re: Pregnancy avoidance

Postby Chris Fullmer » Sun Jun 20, 2010 5:40 pm

Yeah, SketchUp is just not going to do it how you want. Its not a bug, its just the way SU works.
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Re: Pregnancy avoidance

Postby Wo3Dan » Sun Jun 20, 2010 10:41 pm

rv1974,

Like Chris I don't see this as a bug. The arc remains an arc, all its segments coplanar. What you are after is probably the helix by moving a single vertex.
That will not happen. The helix does not have coplanar segments. You need to do this manually.

Wo3Dan

Edit: the yellow curve is either the 3D helix mentioned above or a coplanar curve created by intersection with a simple face. No arc involved.
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Re: Pregnancy avoidance

Postby mac1 » Mon Jun 21, 2010 5:31 am

rv1974
You are trying to 'morph" an arc into a 1/4 section of elipse. A intersection of cylinder and plane with the plane perpendicular to the axis of cylinder is a circle, non perpendicular will be a ellipse and arc will not fit that very well. If you draw a triangle using the cylinder center(base) and the two desired end points gives you a plane ref which a section plane can be algned to and intersected with the cylinder to get what you want. You will have to first use the section tool option to make the slice a group to get the intersection.
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Re: Pregnancy avoidance

Postby rv1974 » Mon Jun 21, 2010 8:30 am

Just thinking aloud.. The original SU product placement is urban design\architecture. Historically
the plan (plan view) is the 'alpha and omega' of the design process. I really can't see any benefit\use in curve bulbing. It appears there's a good niche for some ruby geek- the 'Interpolated_vertex_move.rb'.. or something like that ;)
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Re: Pregnancy avoidance

Postby notareal » Mon Jun 21, 2010 9:36 am

I would use ...zorro!
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Re: Pregnancy avoidance

Postby rv1974 » Mon Jun 21, 2010 10:12 am

notareal wrote:I would use ...zorro!

for Seppuku? :)
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Re: Pregnancy avoidance

Postby notareal » Mon Jun 21, 2010 5:13 pm

rv1974 wrote:
notareal wrote:I would use ...zorro!

for Seppuku? :)

I don't think that so drastic method is in need ;)
Zorro 2 viewtopic.php?f=323&t=16038
Tip for use viewtopic.php?p=216509#p216509
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Re: Pregnancy avoidance

Postby rv1974 » Mon Jun 21, 2010 9:41 pm

Take the arc's end and drag it upward. Take a look at the twisted result in the top view. Zorro.rb is a totally diffrent story- the cylinder in the example picture is just a visual aid.
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Re: Pregnancy avoidance

Postby xrok1 » Mon Jun 21, 2010 10:01 pm

you would have to rotate it to keep the original radius, what your doing by moving one end is changing the radius. :knockout:
you could also draw your arc from A to B1 and set whatever radius you need or snap the radius to existing geometry. ;)
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Re: Pregnancy avoidance

Postby rv1974 » Mon Jun 21, 2010 11:03 pm

Take a look at this skp file. Hope it'd explain the problematics better then my broken english does.
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Re: Pregnancy avoidance

Postby jeff hammond » Tue Jun 22, 2010 3:44 am

like wo3dan said, that's probably helix that you're after.. when you move the vertex of the curve, it stays proportionally correct...


[edit] oh, just saw your latest example.. a little different i guess.
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Re: Pregnancy avoidance

Postby jeff hammond » Tue Jun 22, 2010 4:10 am

i haven't tried it but you might want to check out slope edges in the 1001bit suite
http://www.1001bit.com/products/slopeedges.shtml
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Re: Pregnancy avoidance

Postby notareal » Tue Jun 22, 2010 9:23 am

rv1974 wrote:Take a look at this skp file. Hope it'd explain the problematics better then my broken english does.

This explains the need much better... nothing that zorro can do. :( But if the issue where like you originally posted, then it's a different story.
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Re: Pregnancy avoidance

Postby rv1974 » Tue Jun 22, 2010 12:20 pm

Hi mates! As I can see the disscussion went in the wrong direction (mea culpa).
I have no problem to build this damn ramp and the things like that (with at least 2 difftent ways:
1.extrude plan outline->surface tools->loft (more correct)
2.followmeandkeep.rb->interset with extruded plan (less correct))
Both ways take time and efforts. The aim of this thread was to catch some ruby maker's eye to
the neat (IMHO) idea- to move curve's vertexes in a kinda 'interpolation mode' and without plan distortion, or maybe to find
the already existing script.
Sorry for the lack of clarity :enlight:
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Re: Pregnancy avoidance

Postby notareal » Tue Jun 22, 2010 1:12 pm

Have you looked on various plugins by kirill2008 or maybe SketchyFFD by CPhillips? I could imagine that those could be used in some degree.
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Re: Pregnancy avoidance

Postby Jean Lemire » Tue Jun 22, 2010 3:50 pm

Hi folks.

See this SU file for ideas.
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Re: Pregnancy avoidance

Postby xrok1 » Tue Jun 22, 2010 6:44 pm

i was messing around with this and it would appear you need a compound curve to do what you need so you can't very well expect SU to do it, or a plugin unless its very complex. you'll need some 3d reference dimensions and just draw it 1 segment at a time. :cry:
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Re: Pregnancy avoidance

Postby fredo6 » Wed Jun 23, 2010 9:22 pm

rv1974 wrote:Yes I know. But it's too complicated to build additional surfaces and then clean it.
All I want is to move vertex in distortion free mode .
+ Fredos plugin is not always work smooth to me:
http://screencast.com/t/M2Q1NTMzZWUt

TOS has currently a problem on closed surfaces.
Try to remove the bottom of the cylinder and it should work.

Fredo
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Re: Pregnancy avoidance

Postby rv1974 » Thu Jun 24, 2010 8:29 am

Fredo6 wrote:
rv1974 wrote:Yes I know. But it's too complicated to build additional surfaces and then clean it.
All I want is to move vertex in distortion free mode .
+ Fredos plugin is not always work smooth to me:
http://screencast.com/t/M2Q1NTMzZWUt

TOS has currently a problem on closed surfaces.
Try to remove the bottom of the cylinder and it should work.

Fredo

Yeah no worries I've found workaround. And thank you for the TOS once more!
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Re: Pregnancy avoidance

Postby rv1974 » Thu Jun 24, 2010 8:58 am

This is close to what I want in SU:
http://screencast.com/t/ZjIzMjIzZ
2 main things: interpolation and no plan screwing.
P.S. Even more:
http://www.youtube.com/watch?v=GuXOO-Ofi0Q&feature=player_embedded
You could skip the russian intro and gostraight to ~2.00
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Re: Pregnancy avoidance

Postby notareal » Thu Jun 24, 2010 9:54 am

Those where like sculpting of polygons. Wonder if Sculpt Tools would do the trick? Still for me SketchyFFD sounds like a good option or kirill2008's Control points, did you try those?
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Re: Pregnancy avoidance

Postby fredo6 » Thu Jun 24, 2010 2:17 pm

rv1974 wrote:This is close to what I want in SU:
http://screencast.com/t/ZjIzMjIzZ
2 main things: interpolation and no plan screwing.
P.S. Even more:
http://www.youtube.com/watch?v=GuXOO-Ofi0Q&feature=player_embedded
You could skip the russian intro and gostraight to ~2.00

If this is just on curves (i.e. not surfaces), then it is relatively easy to do in the same way as the Russian demo.
But easy does not mean quickly...! I need to finish Curviloft first.

Fredo
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Re: Pregnancy avoidance

Postby Wo3Dan » Thu Jun 24, 2010 2:37 pm

rv1974,

Now that I've seen both latest attachments, why not simply use the smoove tool on a curve.
(As long as you don't use it when holding down shift for it does not work on edges and exploded curves without faces "attached" to them. In which case you will get a disappearing model that needs to be fixed.)

But as I see you just need vertical displacements to sculpture the perimeter. The smoove tool will let you do what is in attachement [1] easily and as for attachment [2], you can get close, if not the same result.

The smoove tool lets you snap to geometry / input exact values / set the radius / preselect part(S) of the curve (see*) to lift to same height with degrading end-lifts.

(*) in this context by curve I mean exploded curves.

The tool may not be as fancy as in the other application but I think here it is underestimated in what you can do.

Wo3Dan
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Re: Pregnancy avoidance

Postby rv1974 » Thu Jun 24, 2010 3:26 pm

There's outline of the ramp (plan). Say by design the end (AB) should be at -400. Please make the model of the ramp using FDD or Smoove tool(don't forget about clean interpolation). And good luck! :mrgreen:
@Fredo: I swear you was the real target of the topic starter! Gotcha! :ecstatic:
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