Is there anyway to straighten an arc to a precise line? I understand that you can just rotate each segment individually but that doesn’t produce an exact length. I want to the arc length to be precisely the same as the line length.

@slbaumgartner , I know that circles and arcs can get exploded by some tools like Follow-me. What I don’t understand is that Entity info displays the correct length for a circle and arc, but doesn’t display the correct area as @Anssi told me…

I don’t work for Trimble so I can’t give the design rationale, but for whatever reason SketchUp always calculates areas and volumes from its segmented or faceted representation regardless of whether metadata is available.

SketchUp gives the area for faces that are attached to edge segments. I don’t work for Trimble either, but I understand that to be otherwise, the application would have to maintain a separate algorithm for geometry-based and face-based calculations, and they have decided to keep it simple. For thing…

[image] Anssi: For things like room areas the error is tolerable in most cases. yeah. I did a quick test using an online calculator. 1m radius circle vs 24-gon (standard SU circle) vs 48-gon here are the areas, perimeters and deviation percentages Circle : area : 3.14159 m2 perimeter …

I love this thread BUT My head is exploding! I am an ex military pilot who is used to working to tight real life tolerances where lives are in critical danger if I get it wrong, ± 15 seconds, seems a long time but is 0.0173611111111111% of 24 hours. So why we are arguing/discussing something that …

If you want as many places as SketchUp Ruby can give you, select a circle or circular arc and then enter this into the Ruby Console: curve = SketchUp.active_model.selection[0].curve (curve.end_angle - curve.start_angle)*curve.radius Note: if the circle or arc has been scaled or is in a group or co…

Oh wow lots of activity here. Thanks for everyone’s help. I am only looking for the line segment to be as precise as whatever SketchUp considers to be the smallest value it can handle. I also don’t mean connecting points either since SketchUp will connect points even if they are 1/1000" off. I will…

Some stuff to read if you have spare time this year: [image] Small Radius: Distorted Geometry SketchUp I think you guys have hit on all the right points already in this discussion— SketchUp is like all CAD systems in that it handles floating point numbers with fixed precis…

In other words, the earth ain’t even this perfect. That is unless you’re looking at it from Mars or the like. Then it will appear more smooth than the smoothest Q-Ball you can find in our world. This info is from an astronomer dude on the History Channel. As an architect, somewhere around 1/32 inch…

[image] cakrupp: I’m thinking that one could explode the arch and grab a line segment from the arc, rotate it to x-y, then array (multiple copy) it using the number of arc segments as the “X” factor. This info is from a “math dumb” architect…LOL The whole point of this discussion is that if y…

Straightening arc to line with exact length

SketchUp Pro

Wo3Dan January 1, 2023, 2:38am 34

Some stuff to read if you have spare time this year:

Topic		Replies	Views
Making an 8-segment arc while restricting its segment length Pro sketchup , arc , modeling , arctool , segments	23	2394	June 7, 2019
Create Arc by Segment Length SketchUp sketchup , advice , modeling	15	3556	March 8, 2021
Is SketchUp accurate in this example? Off Topic	22	1524	March 24, 2021
Mathematical solution for circles on larger scale SketchUp	17	3686	August 3, 2015
Draw an arc of a specific length SketchUp	10	6748	April 8, 2019

Straightening arc to line with exact length

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