# centers the median point to center of mesh
def CenterMedianPoint():
    filepath = bpy.path.abspath("//space_view3d_move_origin.py")
    exec(compile(open(filepath).read(), filepath, 'exec'))

# deselects all objects
def DeselectObjects():
    for obj in bpy.data.objects:
        obj.select = False

# bisects object based on coordinates and direction
def BisectObject(coX, coY, coZ, noX, noY, noZ):
    bpy.ops.mesh.bisect(plane_co=(coX, coY, coZ), plane_no=(noX, noY, noZ))

# get the dimensions of active object
dimensionX, dimensionY, dimensionZ = bpy.context.active_object.dimensions

# calculate dimensions and cell structure
cutObjectDimensionX = dimensionX / 5
cutObjectDimensionY = dimensionY / 5
cutObjectDimensionZ = dimensionZ / 5
objectStartX = (dimensionX * (-1)) / 2
objectStartY = (dimensionY * (-1)) / 2
objectStartZ = (dimensionZ * (-1)) / 2
objectEndX = dimensionX / 2
objectEndY = dimensionY / 2
objectEndZ = dimensionZ / 2

cellCount = 1
parentCellCount = 1

# first cut iteration
for i in range(0, 4):
    # selects object, enters EDIT mode and centers median point for easier coordinate calculation
    bpy.context.scene.objects.active = bpy.data.objects['objectToBisect']
    bpy.ops.object.mode_set(mode = 'EDIT')
    bpy.ops.mesh.select_all(action='TOGGLE')
    CenterMedianPoint()
    # bisects objcet and selects bisected vertices
    BisectObject(0, (cutObjectDimensionZ-(cutObjectDimensionZ*i)), 0, 0, 1, 0)
    SelectVerticesInBound(bpy.data.objects['objectToBisect'], Vector((objectStartX, (cutObjectDimensionY-(cutObjectDimensionY*i)), objectStartZ)), Vector((objectEndX, objectEndY, objectEndZ)))
    # separates selected vertices into new object
    bpy.ops.mesh.separate(type='SELECTED')
    bpy.ops.object.mode_set(mode = 'OBJECT')
    DeselectObjects()