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Offseting a polyline of arcs
I'm having difficulting offseting a long open polyline of arcs.
Typically when it is a long line and I suspect it won't offset properly, I copy the line into a new file and offset there, then copy back to the orginial file.
This workaround was working for me even earlier this week, but now it either refuses to offset, or offsets just segments of that line.
Does anyone know what to do about this ?
To try to get around the problem, I split up the long polyline into shorter polylines. One of these smaller polylines was made of just 3 arcs, quite wide arcs, and it would not offset even just a small amount.
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Welcome to the Forums
Is it one long polyline you're trying to offset?
If it's many polylines do they have the same Z value?
I only work with LT so not 100% sure about this, but might different Z values knock your offsets about a bit?
Howard Walker
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Post a sample drawing with that kind of problem Polyline(s) in it.
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Hi, I've attached a file with a line that won't offset even by just 50. It offsets on one side ok but not the other.
Thanks
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@Anonymous wrote:
Hi, I've attached a file with a line that won't offset even by just 50. It offsets on one side ok but not the other.
Thanks
For me [testing in Acad2015], it Offsets to one side but not the full length of it, and one of the vertex locations seems to become two coincident [or maybe very close to coincident? -- stepping around didn't pause there on the original] vertices. I wonder whether it may have to do with its being s o f a r from the origin. When I Moved it to near the origin, Offset worked as expected, to both sides.
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I tried your dwg. it works as is fine as is in Map3d2015 and behaves as you describe in plain AC2015.
Maybe map can handle the math better?
Dave
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I tried it in Architecutre 2016 and it had the same problem of being able to offset 50 right but not left. I could offset 1000 and 2000 okay but not 50. Offsetting 100 dropped the first segment when offsetting to the left. Segment diameters range from 37,000 to 1.7 million so math may be the problem but I thought ACAD calculated to the 9th decimal precision.
Segment1 - 37,129 Dia
Segment 2 - 1,736,066 Dia
Segment 3 - 76,758 Dia
Segement 4 - 89,845 Dia
Segment 5 - 105,388 Dia
@parkr4st wrote:I tried your dwg. it works as is fine as is in Map3d2015 and behaves as you describe in plain AC2015.
Maybe map can handle the math better?
Dave