Linetype graphical display on arcs
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I don't know what is the root cause of this issue, but when we use non-continuous linetypes on arcs, cirlces, or arc segments of polylines, the graphical display of the linetypes does not coincide with the graphical display of continous linetypes.
I have attached an image demonstrating this issue where:
- A red continuous polyline is curved at a radius of 2000'+
- A white alignment using a "flowline" style linetype has been created from the original red line
- A second white alignment using a "flowline" style linetype has been created and the original arc radius has been preserved but the arc length has been shortened.
You can see that the grips all show that the polyline and alignment exist on the same mathematical and spatial line, but that the graphics display incorrectly.
We have been testing this with all the linetypes in our files. It appears that only the continuous linetype does not have this issue. All other CAD default layers and custom layers exhibit this behavior. What appears to be happening is that cad is averaging the lines at some third, or quarter points, and creating tangents (maybe arcs) that approximate the arc, but which weave inside and outside of the true shape. (To see the default cad linetypes diverge you must REALLY zoom in.)
Is there a workaround or does this need to go to Autodesk to resolve in future releases? I can't imagine this CAD behavior has been preserved since the beginning of CAD has it?
