Arcs not visible in DXF created by AutoCAD Plant3D

[jsimomaa]

Describe the bug
Some parts of the DXF is not rendered

To Reproduce

ezdxf view proxy.dxf

Here is the DXF:
proxy.zip

Expected behavior
Arcs would be visible as well

Screenshots
ezdxf view:

Trueview:

[mozman]

Hi!

The elliptic arc is a new proxy graphic entity to me and it's not documented in the DWG reference from the Open Design Alliance.

I figured out how it works for this example. This is the exploded proxy graphic and it looks fine:

But I need more examples that don't just have 180 degree arcs and axes that don't line up with the x- and y-axis of the WCS.

Please, can you provide such PROXY_ENTITY examples?

[jsimomaa]

Thank you for the support!

Here is another example with proxy graphics:
proxy2.zip

[mozman]

My implementation of the elliptic arc entity seems to work:

I'll close this issue, please open a new issue if you find another example that isn't rendering correctly.