Circles with large sweep angle do not render not as expected

[XinJack]

Describe the bug
When I create a circle with a large sweep angle (e.g., 7200 degrees), the circle does not render as expected (as shown in the following image). Maybe we could add restrictions to the Arc3d API to prevent the user from creating such circles or fix the rendering issue. (As far as I know, in MicroStation, we can create such circles and they render correctly.)

To Reproduce
We can use the following code to generate the problematic circle:

Arc3d.create(Point3d.create(0, 0, 0), Vector3d.unitX(), Vector3d.unitY(), AngleSweep.create(Angle.createDegrees(7200)))

[dassaf4]

Pretty, but we'll fix this. Thanks for pointing it out!

[saeeedtorabi]

I was not able to regenerate this using
Arc3d.create(Point3d.create(0, 0, 0), Vector3d.unitX(), Vector3d.unitY(), AngleSweep.create(Angle.createDegrees(7200)));
or even in a sandbox I created to visualize an arc
https://www.itwinjs.org/sandbox/SaeedTorabi/ArcCreate

However, if I call Arc3d.emitStrokes to stroke the arc and then display the arc in MicroStation, I get a wrong image similar to what was reported:

We think the display code may be calling into core-geometry to stroke the arc, which is how it gets to Arc3d.emitStrokes.

I am working to fix the issue by limiting the angle sweep in emitStrokes.

[XinJack]

Should use AngleSweep.create(Angle.createDegrees(...)) to reproduce the problem. The sandbox linked above uses AngleSweep.createStartEndDegrees(...), whose implementation already limits the resulting AngleSweep to 360 degrees if it exceeds that value.

[saeeedtorabi]

Should use AngleSweep.create(Angle.createDegrees(...)) to reproduce the problem. The sandbox linked above uses AngleSweep.createStartEndDegrees(...), whose implementation already limits the resulting AngleSweep to 360 degrees if it exceeds that value.

Right. I modified the sandbox and now I can regenerate the issue.

We resolved the issue here by limiting the sweep to 360 degrees in Arc3d constructor. It should be available in the next iTwin version but will take some time to be available in the sandbox as they get updated less frequently.