When I attempt to add a 12-segment Arc to my model using the following code, the result is 12 individual edges, rather than an Arc made up to those same 12 edges. In other words, when I try to select the Arc I just made, only a single edge is selected, not the entire Arc (as displayed in ‘Entity Inf…

I’ve tested it. Using -ve angles causes the issue. If the start/end angles >=0 it works OK. You can draw the arc below the X_AXIS as you want by simply setting both of you angles to +ve values AND then reverse the vector used for the arc_norm… I’ve never noticed this before - having always used …

I will try this by just negating my ‘arc_norm’ and making the ‘end angle’ positive…

That did it. :+1: I was calculating ‘arc_norm’ as a cross product of two vectors, I just reversed them which gives me a vector of the same length but in the opposite direction. Works great, thank you :grinning:

Logged an issue: Issue with entities.add_arc? · Issue #575 · SketchUp/api-issue-tracker · GitHub

Newish to SU Ruby, and I’m having difficulty with add_arc. In short, it seems to me that the method is missing a parameter, namely arc direction, and that the method interprets angles and normal to get what’s needed, but it’s all a bit of smoke and mirrors to me. In this simple example below, I am…

Can you please correct your post, considering how to post code correctly in the forum: [How to] Post correctly formatted and colorized code on the forum? Thanks!

[image] geoffreyhawkesford: I think a new method (or overloaded add_arc?) is necessary to avoid upgrade chaos. This is not likely to happen very soon. Better to understand how it works now and use it as is, or write your own wrapper method. [image] geoffreyhawkesford: … it’s all a bit of…

Thanks Dan, it hadn’t occurred to me that add_arc was designed to produce an acw arc which would be fine. Going from 6 oclock to 3 oclock in my example is still worrying mod.entities.add_arc [10,0,0], [1, 0, 0], [0, 0, 1], 10, -90.degrees, 0.degrees, 6 # is correct but mod.entities.add_arc [10,0…

[image] geoffreyhawkesford: Thanks Dan, it hadn’t occurred to me that add_arc was designed to produce an acw arc which would be fine. I think it may be the norm for 3D and CAD applications. It was the same in AutoCAD. [image] geoffreyhawkesford: but … mod.entities.add_arc [10,0,0], [1, …

Adding an Arc via API

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dezmo July 7, 2025, 1:48pm 8

Can you please correct your post, considering how to post code correctly in the forum:

[How to] Post correctly formatted and colorized code on the forum?

Thanks!

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Adding an Arc via API

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