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Perttu  
#1 Posted : Wednesday, January 03, 2018 3:37:51 AM(UTC)
Perttu

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Joined: 1/3/2018(UTC)
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Hi I am about to purchase viacad or sharkcad. If I have understand viacad dont generate 3d curves as curves
to 2d views, but uses instean polilines. ( shark does use curves? )

Can anyone show an examble how accurate the polyline generated "curves" are?

Thanks
Perttu
jdi000  
#2 Posted : Wednesday, January 03, 2018 7:16:20 AM(UTC)
jdi000

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Hello Perttu

Yes that is accurate statement, SharkCad can generate precise curves in the 3d to 2d tools-line views. ViaCAD's 3d to 2d tools generate polyline views. These are accurate fitted polylines its not just a representation of the geometry its a fully accurate polyline so the geometry is fully accurate. The difference is you have a polyline vs a curve if you are using the geometry for drawings or documentation there is no difference.

I have attached a dxf that you can review. You can also download a trial version of the software for review.

Regards

Jason
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murray  
#3 Posted : Wednesday, January 03, 2018 7:34:06 AM(UTC)
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Accuracy is relative to local curvature, not absolute. The picture shows point density of a half-scale polyline from sheet view vs. the original curve.

Edited by user Wednesday, January 03, 2018 7:36:11 AM(UTC)  | Reason: Not specified

murray attached the following image(s):
Polyline point density vs original curve.PNG (35kb) downloaded 5 time(s).

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Perttu  
#4 Posted : Wednesday, January 03, 2018 11:26:23 PM(UTC)
Perttu

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Joined: 1/3/2018(UTC)
Posts: 2

Thanks

Looks "fair" enough to me

Perttu
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