Adaptively-rounded corners on mixed column stacks

This is a demo tutorial. While there is no step-by-step commentary available (yet), the live demo below is fully functional. Feel free to open it for full source code.

This demo shows how adapters can be used to apply custom fuzzy logic to rounded corners on column stacks.

See the Pen
Adaptively rounded corners on mixed stacks by amCharts team (@amcharts)
on CodePen.0

Another version with mixed positive and negative values:

See the Pen
Adaptively-rounded corners on mixed stacks by amCharts team (@amcharts)
on CodePen.0