A tiny browser tool that finds the two miter angles where two surfaces — most prominently roof planes, like a dormer against a main roof — meet at a shared edge.
In Archicad you can use the "scissors" (cmd + click) in 3D to automatically miter two roof edges – however, this operation ignores the thicknesses and thus always will generate a plumb cut.
For cases where the joined roof surfaces are of different thicknesses you have to manually use the "Custom Roof Edge" dialog from the Pet Palette and numerically put in the right numbers. This tool helps you with that task.
