Bend Stairs to Curved Wall

ryangarnett

Hello All,

I would like to bend my stairs, which are a group, to fit to my curved wall. I have tried Shape Bender, but its not working. I have attached a screen shot of my model.

Any help would be great.

Thanks....

Bend Stairs to Curved Wall.jpg

alvis

there are many ways. maybe this method? http://sketchucation.com/forums/viewtopic.php?p=75940#p75940

ryangarnett

I looked at that, but it won't work. When I "play it again" it won't copy

Dave R

It does work if you do it right. Watch the video carefully.

ryangarnett

I've watched it 10+ times...

Dave R

I did what was shown in the video.

ryangarnett

Yes I just did it too....but the issue is, which is my question, how to wrap it to a wall. If you just make it free like in the video the stairs won't be connected to a wall. This is based on the fact that SU makes curves as polygons, not arcs. So when you have a major node change from one line segment to another, the angle will change dramatically, which will differ from the angle set in the "play it again.." Any thoughts on that?

ryangarnett

Here is the model if you are interested

OilTanker.skp

Dave R

Change the number of sides in your cylinder to match the number of steps you want. Or rather change the number of sides on the cylinder so the steps fall exactly between vertices.

ryangarnett

I can't do that. I work with real data, building features collected from stereo imagery, so I don't have the luxury of making buildings with "fake" values. I have to use the data that is provided, hence the curve to wall issue.

Dave R

So your real data for the tank indicates the number of sides you must use to draw a cylinder? Well, then make the steps longer so they extend inside the cylinder and cut them off at the wall of the tank after you've placed them.

Why do you keep trotting out new details with each post? We have no way of knowing all these things unless you tell us.

ryangarnett

Here is a sample of the tankers I need to model. So the "building" or tank with height will be provided, but I have to add the detail (stairs). And as you can see in the picture, the stairs "snap" to the side of the tank and do not overlap.

ryangarnett

I'm not trotting out new detail, its in the post "to curved wall". You are proposing changing my wall, so I am providing you the information as to why that won't work.

Rich O Brien

[screenr:2fyym52b]fwXH[/screenr:2fyym52b]

jeff hammond

@rich o brien said:

fwXH

i found fault with that.

(j/k)

spreadcore

Just asking is this close to what your trying to do?

I used shape bender.

ryangarnett

Yes that is exactly what I am hoping to achieve. When I have used Shape Bender it lines the stairs up wrong. Would you mind sharing your steps, etc...

Thanks...

spreadcore

@ryangarnett said:

Yes that is exactly what I am hoping to achieve. When I have used Shape Bender it lines the stairs up wrong. Would you mind sharing your steps, etc...

Thanks...

I assume your referring to me.

Okay I made a tutorial, I hope I did it right first time making one.

FYI: I used TIGs ArcBy plugin to make the arc.

TIGs ArcBy Plugin here...
http://sketchucation.com/resources/pluginstore?pln=TIG_arcBYtools

TIGs ArcBy...
I used the "Radius+Length"

Type in radius of the cylinder
Type in length of the arc
Change number of segments

tank_stairs_tut.skp

ryangarnett

Thanks Spreadcore...I will try that for sure....Thanks again...

ryangarnett

Thank you spreadcore...that tutorial was perfect. I didn't know that you had to have the stairs the same height, and that the straight line needed to be the same length as the rise. These were then things I was missing.

Thanks again....really helped!