plane from face cuts the opposite side

[makc]

if I set the plane like this

			plane.setFromCoplanarPoints (
				someGeometry.vertices[face.a],
				someGeometry.vertices[face.b],
				someGeometry.vertices[face.c]
			);

inner side is cut. I have to use b-a-c order to cut outer side. this is a bit counter-intuitive

[tdhooper]

I'm not sure either way is intuitive, would be best to have an option for which side to keep.

[makc]

I guess for me it makes sense because I was cutting with the faces of convex mesh to keep things inside of it; I guess someone with the opposite intention would think differently.

[KonradLinkowski]

Maybe the function should return both pieces of the mesh.