Sloppy Polygon Arcs

Question

I'm trying to create custom footprint pads with a non rectangular shape. When using ARCs in poly regions, the arc calculation is very grainy and sloppy. Is there a hidden grid setting or is there any way to fix this? In this case I am trying to create a polygon within a footprint, but I have seen similar behavior with regions in PCBDoc's. The bottom photo shows the issue when a 90 degree ARC is attempted:

I will temporarily use 45 degree ARCs for my design but am hoping for a solution better than 'no ARCs in poly regions'.

Thanks, Matt

e14softwareuk · Accepted Answer

Without the images I'm taking a guess you are seeing something like the image below where a large arc approximation is used.

When drawing a polygon in the PCB editor there is a property value to adjust the arc approximation.

This parameter can be set for polygons but not filled regions and the footprint editor does not have the polygon draw command. One trick is to draw the shape in the PCB editor using a polygon and then copy and paste into the footprint. It pastes as a region but keeps the smooth arcs.