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Author Topic: Using Railclone to generate stairs including railing  (Read 4377 times)

Marc

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Using Railclone to generate stairs including railing
« on: February 25, 2011, 04:28:31 PM »
I'm trying to use Railclone to parametrically create stairs similar to the one shown in the first picture.

I seem to have encountered a few limitations of the plugin:

- I've tried to use the 'SteelTube 1' preset as a starting point (See attached image), however the bent ends of the railing (in the XZ plane) are severely distorted.
A solution may be if Railclone would be able to use splines as segments (instead of just geometry), thickness would then be added with the sweep modifier.

- How would you generate the steps of the stairs? A problem I see is that there is no way to adjust the vertical spacing between the steps, just the horizontal spacing.

- The stairs would use two separate segments to 'evenly' space along the spline, namely the steps and the railing posts, both having their own spacing distance. However, in Railclone it's ony possible to use one segment for the 'evenly' geometry.

Is it possible to generate stairs like the one shown with Railclone? I may have missed some tricks to make this work.

iToo

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Re: Using Railclone to generate stairs including railing
« Reply #1 on: February 25, 2011, 07:22:42 PM »
Quote
- I've tried to use the 'SteelTube 1' preset as a starting point (See attached image), however the bent ends of the railing (in the XZ plane) are severely distorted.

This problem may be partially solved applying a X scale to the start/end segments. Not perfect, but the distortion is much less noticeable (see the Local Transform->Scale X parameters in the attached scene).

Quote
A solution may be if Railclone would be able to use splines as segments (instead of just geometry), thickness would then be added with the sweep modifier.

That may be useful for some objects, but using a straight spline it's not possible to define the path of the tube along the upside and downside ends. Anyways, we'll think on possible fixes for this issue.

Quote
- How would you generate the steps of the stairs? A problem I see is that there is no way to adjust the vertical spacing between the steps, just the horizontal spacing.

Why do you need to define the vertical spacing ?

If the steps are aligned vertically with the path, you only should to adjust the horizontal spacing (using Padding). The vertical spacing is already defined by the slope of the spline.

Quote
- The stairs would use two separate segments to 'evenly' space along the spline, namely the steps and the railing posts, both having their own spacing distance. However, in Railclone it's ony possible to use one segment for the 'evenly' geometry.

Some complex objects as this, would require several RailClone objects. We have plans to solve this issue, adding multiple rules to the plugin or with other solutions that we are evaluating.

Quote
Is it possible to generate stairs like the one shown with Railclone? I may have missed some tricks to make this work.

I've attached a possible solution using three RC objects.

Note: To create a stair as closely possible to your sample, i've used 'Adaptative' mode for the posts, and their length is dependent of the path's slope. If you modify it, adjust also the Local Transform->Z scale parameter. Using the 'Vertical' mode this is not needed.

Carlos Quintero
iToo Software