I am trying to introduce some basic grading tools to my QGIS workflow that would otherwise have to be done in Civil3D by another person. The basic idea is to take a polygon and buffer its vertices at a specific slope (say 3:1) such that the final buffer distance is defined by the intersection with the slope and a DEM. I have not found any plugin for this purpose. What might be possible in a custom model? Maybe this is actually a plug-in development project?
