ready to generate geometry - edge fillet blender 2.5

the code is a little lengthy to post in its entirety, but you can download it here

def get_correct_verts(arc_centre, arc_start, arc_end, NUM_VERTS, context):
        
    obj_centre = context.object.location
    axis = mathutils.geometry.normal(arc_centre, arc_end, arc_start)
 
    point1 = arc_start - arc_centre
    point2 = arc_end - arc_centre
    main_angle = point1.angle(point2)
    main_angle_degrees = math.degrees(main_angle)

    div_angle = main_angle / (NUM_VERTS - 1)

    if DEBUG == True:
        print("arc_centre =", arc_centre)
        print("arc_start =", arc_start)
        print("arc_end =", arc_end)
        print("NUM_VERTS =", NUM_VERTS)
    
        print("NormalAxis1 =", axis)
        print("Main Angle (Rad)", main_angle, " > degrees", main_angle_degrees)
        print("Division Angle (Radians)", div_angle)
        print("AXIS:", axis)
    
    trig_arc_verts = []

    for i in range(NUM_VERTS):
        rotation_matrix = mathutils.Matrix.Rotation(i*-div_angle, 3, axis)
        # trig_point = (arc_start - obj_centre - arc_centre) * rotation_matrix # old
        trig_point = rotation_matrix * (arc_start - obj_centre - arc_centre) # new
        trig_point += obj_centre + arc_centre
        trig_arc_verts.append(trig_point)        
        
    return trig_arc_verts

Matrix.Rotate() was the most complicated part, but now i've broken through that barrier it doesn't seem such utter voodoo anymore. Warning to user: you must apply scale/location/rotation transforms to your profile/object first before running the code or the vertices will appear somewhere else. Not sure if there is a cute way around that.

small update

blender 2.5 GL fillet v0.2 from zeffii stanton on Vimeo.