The other is FlexSpline.lsp with its FLEX command, available here, which does approximately-sine-wave-shaped curvature in a similar way. Look at the image attached to the first Comment there. One is InsulBattPoly.lsp with its IB command, available here, which makes repeated back-and-forth touching S-curvatures similar to the BATTING linetype adjusted to meet without overlapping regardless of curvature. I have developed two routines that do better in those situations, involving not linetypes, but constructing Polylines or Splines to make the shaping, which can get tighter on the inside and looser on the outside of areas of curvature as appropriate. It's inherent in the nature of linetypes with shapes embedded that, since the embedded elements can't be any different at different locations along an object to which the linetype is assigned, they do things like overlap at areas of sharper curvature, bends, etc. Please suggest me a better approach to do in Vanilla Autocad. But it is difficult to show flexible ductwork in very conjested/ Sharp turning areas.
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