cutnotes

'Cutline JAM9' uses a SPLINE2 statement for the pretty part. This is OK, but it prevents us from having an easy masking function in the cutline.

Instead of a spline, use an trimmed ellipse. We can build the ellipse from a 900/4000 POLY2_A, which can have a fill, and stretch it with a MUL2.

The S looks good when 1/11 of the ellipse is trimmed off. After the MUL2, this is the same as 1/11 of the circle.

Need to figure out how much arc is left after that trim.

One side of the S will be filled. The other side will be filled except for the ellipse.

UPDATE: Done. That should hold for a while.

Location: 06 Wood & Plastic / Railings & Stairs (I'm thinking about moving it, since it's not really a fine detail-type thing any more. More like a missing tool thing. Not to mention, it could be concrete. I really wish the object browser could handle aliases. As for now, there it lies.)

UPDATE: Stair Body JM9a is exactly like Stair Body JM9, but I added the story-sensitivity behavior from Railing JAM9. See below.

In honor of the story cuts, I also added an integrated cutline. It is simplified, and it still doesn't mask, but I'm working on that.

I also (now how much would you pay) added a Cover Fill Pen parameter, which simply allows the object to be opaque.

All this is identical to the JM9 post otherwise.

(Teaser futuristic update-to-be: I am already mostly done with Stair Body JM10, believe it or not. The big deal there is intelligent interaction with the new Floor Plan Cut Plane. Pretty cool.)

A very basic (in a good way) flight of stairs. An incremental improvement on Stair Stringer JAM8. You can still use it as a stringer; just make it thin. I changed the name because I use it more often for actual stairs.

Sidebar: There's a stair tool (Technically, the StairMaker add-on), which you should never use. Then there's ArchiStair by the very capable and friendly Cigraph, which is like a good StairMaker, only better.

I recently used an ArchiStair spiral stair for which I was very grateful, but generally I am skeptical of full-service add-ons for highly detailed building parts. No matter how many options, configurations, and details are offered, you will soon run into a custom situation where the add-on doesn't quite make it.

I would rather have more, simpler, separate elements. (Well, no, I would rather have one element do everything by magic, but it's not realistic.) If you run into a freaky custom railing, you can focus on that without wrecking the whole stair. And: In design development, you can show just a simple stair, leaving the details for later, where they (the details) belong.

This is consistent with a general principle of ArchiCAD's design, our workflow, and how projects are actually built. Big, chunky stuff comes first: Walls, slabs, roofs, the basic geometry of stairs. Fine detail comes later, and is applied to the big stuff: Trim, finish floors, newels and railings.

So: The Stair Body object is like a slab tool for stairs.

Another major basic-yet-detailed building part is the chimney. See what I mean? End sidebar.

Now we can talk about the object.

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