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Offset with distance gives incorrect result

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Christopher S. Juliano

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Dec 17, 1998, 3:00:00 AM12/17/98

Does the problem occur a the "tips" or "points" or is it a constant
throughout? We have run into problems where the object (usually a
polyline) juts out. In our case the distances is usually greater.

Christopher

Thomas Ocklund wrote:

> Several users at our company has reported that offset distance for
> instance 100 gives she result of something like 99.8 when checking with
> dist-command. This only occurs sometimes, I don't know exactly when.
> Has anyone the explanation, or better, a solution to this problem.
>
> Thomas Ocklund
> Wingardh Arkitektkontor AB

juliano.vcf

Thomas Ocklund

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Dec 17, 1998, 3:00:00 AM12/17/98

Finnur P. Frodason

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Dec 17, 1998, 3:00:00 AM12/17/98

It's very likely that "snap" is on and it is set to 1 (e.g. mm).
Personally I never use snap only object snap :-)

Terry W. Dotson

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Dec 17, 1998, 3:00:00 AM12/17/98

Christopher S. Juliano wrote:

> Does the problem occur a the "tips" or "points" or is it a constant
> throughout? We have run into problems where the object (usually a
> polyline) juts out. In our case the distances is usually greater.

Very good point Chris.

As the interior angle decreases, the distance between offset endpoints
increases. However in parallel sections the perpendicular distance 'should'
always be 100. For example with a 100 unit offset.

135° interior angle = 108.35
45° interior angle = 261.60

So the most accurate representation would be achieved if you filleted the
resulting offset to 100, making all points along the path truly 100 usings
away.

Fun Stuff, Terry

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