pdt_command.py

    # _offset <= 0 is ignored since a bevel/fillet radius must be > 0 to make sense
    _offset = float(values[0])
    _segments = float(values[1])
    if _segments < 1:
        _segments = 1   # This is a single, flat segment (ignores profile)
    _profile = float(values[2])
    if _profile < 0.0 or _profile > 1.0:
        _profile = 0.5  # This is a circular profile
    if mode == "i":
        # Fillet & Intersect Two Edges
        # Always use Current Selection
        verts = [v for v in bm.verts if v.select]
        edges = [e for e in bm.edges if e.select]
        if len(edges) == 2 and len(verts) == 4:
            plane = pg.plane
            v_active = edges[0].verts[0]
            v_other = edges[0].verts[1]
            v_last = edges[1].verts[0]
            v_first = edges[1].verts[1]
            vector_delta, done = intersection(v_active.co,
                                              v_other.co,
                                              v_last.co,
                                              v_first.co,
                                              plane
                                              )
            if not done:
                pg.error = f"{PDT_ERR_INT_LINES} {plane}  {PDT_LAB_PLANE}"
                context.window_manager.popup_menu(oops, title="Error", icon="ERROR")
                raise PDT_IntersectionError
            if (v_active.co - vector_delta).length < (v_other.co - vector_delta).length:
                v_active.co = vector_delta
                v_other.select_set(False)
            else:
                v_other.co = vector_delta
                v_active.select_set(False)
            if (v_last.co - vector_delta).length < (v_first.co - vector_delta).length:
                v_last.co = vector_delta
                v_first.select_set(False)
            else:
                v_first.co = vector_delta
                v_last.select_set(False)
            bmesh.ops.remove_doubles(bm, verts=bm.verts, dist=0.0001)
        else:
            pg.error = f"{PDT_ERR_SEL_4_VERTS} {len(verts)} Vert(s), {len(edges)} Edge(s))"
            context.window_manager.popup_menu(oops, title="Error", icon="ERROR")
            raise PDT_SelectionError

    bpy.ops.mesh.bevel(
        offset_type="OFFSET",
        offset=_offset,
        segments=_segments,
        profile=_profile,
        vertex_only=vert_bool
    )