KDE Logo with draft

For die cast, the positive model should have a draft. That is, its sides should not be exactly vertical, but taper towards the top.

FreeCAD offers an extrude function to apply a thickness to a 2D design. This extrude function has a Taper Angle parameter to achieve exactly that.

Unfortunately the taper angle parameter only works for polygons up to a certain complexity.

Here is an alternative approach that works with shapes of any complexity:
* Given a shape in the X-Y plane
* Don't extrude along the normal (or Z-Axis), extrude along a user defined axis that is somewhat off to one side. E.g. (0.1, 0, 1) extrudes mainly along the Z axis, but shears the object slightly into X-Direction.
* Extrude the shape multiple times, using all possible combinations of -0.1 or 0 or 0.1 in each of X and Y dimensions. That is 8 combinations.
* Apply a union operator on the 8 extrusions.
The resulting objects is (roughly) tapered.

The KDE logo has sharp inward pointing corners in the cen