[Blender] ブレンダーで球を作るスクリプト

blender_sample1.py

"""
create_casing.py

Tomoyuki Nohara 2016/06/01
TODO: Add Material

"""

import bpy

# ***************************************
# Setting
# ***************************************
# 単位系
bpy.data.scenes['Scene'].unit_settings.system = "METRIC"
bpy.data.scenes['Scene'].unit_settings.system = "NONE"
bpy.data.scenes['Scene'].unit_settings.system_rotation = "DEGREES"
# 1[BU] = a[m]
bpy.data.scenes['Scene'].unit_settings.scale_length = 1

# ***************************************
# Parameter
# ***************************************
cm = 1e-2
# Casing
case_radius_outer = 15 * cm  # [m]
case_tickness = 0.5 * cm  # [m]
case_radius_inner = case_radius_outer - case_tickness  # [m]

# Rib
rib_radius_innter = 10 * cm  # [m]
rib_tickness = 1 * cm  # [m]

# ***************************************
# Utilities
# ***************************************


def delete_all():
    for item in bpy.context.scene.objects:
        bpy.context.scene.objects.unlink(item)

    for item in bpy.data.objects:
        bpy.data.objects.remove(item)

    for item in bpy.data.meshes:
        bpy.data.meshes.remove(item)

    for item in bpy.data.materials:
        bpy.data.materials.remove(item)


def delete_object(item):
    bpy.context.scene.objects.unlink(item)
    bpy.data.objects.remove(item)
    # bpy.data.meshes.remove(item)


def get_active_object():
    bpy.ops.object.mode_set(mode='OBJECT')
    return bpy.context.active_object
# ***************************************
# Utilities
# ***************************************


def deg_to_rad(d):
    import math
    return d * math.pi / 180.0

# ***************************************
# Utilities
# ***************************************


def rename(_name):
    obj = bpy.data.objects[0]
    obj.name = _name


def get_objs():
    return bpy.data.objects


# ***************************************
# Function
# ***************************************
def difference(target, opObj, delete=True):
    '''subtract opObj from the target'''
    # Deselect All
    bpy.ops.object.select_all(action='DESELECT')
    # Select the new object.
    target.select = True
    bpy.context.scene.objects.active = target
    # Add a modifier
    bpy.ops.object.modifier_add(type='BOOLEAN')

    mod = target.modifiers
    mod[0].name = "SubEmUp1"
    mod[0].object = opObj
    mod[0].operation = 'DIFFERENCE'

    # Apply modifier
    bpy.ops.object.modifier_apply(apply_as='DATA', modifier=mod[0].name)

    if delete:
        delete_object(opObj)

    return target


def union(target, opObj, delete=True):
    # Deselect All
    bpy.ops.object.select_all(action='DESELECT')
    # Select the new object.
    target.select = True
    bpy.context.scene.objects.active = target
    # Add a modifier
    bpy.ops.object.modifier_add(type='BOOLEAN')

    mod = target.modifiers
    mod[0].name = "SubEmUp2"
    mod[0].object = opObj
    mod[0].operation = 'UNION'

    # Apply modifier
    bpy.ops.object.modifier_apply(apply_as='DATA', modifier=mod[0].name)

    # Delete operation object
    if delete:
        delete_object(opObj)

    return target


def intersect(target, opObj, delete=True):
    # Deselect All
    bpy.ops.object.select_all(action='DESELECT')
    # Select the new object.
    target.select = True
    bpy.context.scene.objects.active = target
    # Add a modifier
    bpy.ops.object.modifier_add(type='BOOLEAN')

    mod = target.modifiers
    mod[0].name = "SubEmUp3"
    mod[0].object = opObj
    mod[0].operation = 'INTERSECT'

    # Apply modifier
    bpy.ops.object.modifier_apply(apply_as='DATA', modifier=mod[0].name)

    # Delete operation object
    if delete:
        delete_object(opObj)

    return target


def add_ring_plane(name):

    # make plane
    bpy.ops.mesh.primitive_cylinder_add(
        vertices=64,
        radius=rib_radius_innter*1.5,
        depth=rib_tickness,
        end_fill_type='NGON',
        view_align=False,
        enter_editmode=False,
        location=(0, 0, 0),
        rotation=(0, 0, 0),
        layers=(True, False, False, False, False, False, False, False, False, False,
                False, False, False, False, False, False, False, False, False, False)
    )
    bpy.data.objects[0].name = "tmp_rib1"

    # boolean inner
    bpy.ops.mesh.primitive_cylinder_add(
        vertices=64,
        radius=rib_radius_innter,
        depth=rib_tickness*2,
        end_fill_type='NGON',
        view_align=False,
        enter_editmode=False,
        location=(0, 0, 0),
        rotation=(0, 0, 0),
        layers=(True, False, False, False, False, False, False, False, False, False,
                False, False, False, False, False, False, False, False, False, False)
    )
    bpy.data.objects[0].name = "tmp_rib2"

    # Diifer
    objs = bpy.data.objects
    target = objs["tmp_rib1"]
    opObj = objs["tmp_rib2"]
    target = difference(target, opObj)

    target.name = name
    return target


def add_ribs():
    rib1 = add_circle_plane("rib1")

    rib2 = add_circle_plane("rib2")
    rib2.location.z += case_radius_outer/2

    rib3 = add_circle_plane("rib3")
    rib3.location.z -= case_radius_outer/2

    return [rib1, rib2, rib3]


def add_sphere(name):
    res = bpy.ops.mesh.primitive_uv_sphere_add(
        segments=32,
        ring_count=16,
        size=case_radius_outer,
        view_align=False,
        enter_editmode=True,
        location=(0, 0, 0),
        rotation=(0, 0, 0),
        layers=(True, False, False, False, False, False, False, False, False, False,
                False, False, False, False, False, False, False, False, False, False)
    )
    obj = get_active_object()
    obj.name = 'case_radius_outer'

    res = bpy.ops.mesh.primitive_uv_sphere_add(
        segments=32,
        ring_count=16,
        size=case_radius_inner,
        view_align=False,
        enter_editmode=True,
        location=(0, 0, 0),
        rotation=(0, 0, 0),
        layers=(True, False, False, False, False, False, False, False, False, False,
                False, False, False, False, False, False, False, False, False, False)
    )
    obj = get_active_object()
    obj.name = 'case_radius_inner'

    # Diffierencial
    objs = get_objs()
    target = objs["case_radius_outer"]
    opObj = objs["case_radius_inner"]
    target = difference(target, opObj)
    target.name = name
    return target


def add_sphere_shell(radius, name):
    res = bpy.ops.mesh.primitive_uv_sphere_add(
        segments=32,
        ring_count=16,
        size=radius,
        view_align=False,
        enter_editmode=True,
        location=(0, 0, 0),
        rotation=(0, 0, 0),
        layers=(True, False, False, False, False, False, False, False, False, False,
                False, False, False, False, False, False, False, False, False, False)
    )
    obj = get_active_object()
    obj.name = name
    return obj


def add_circle_plane(name):
    # make plane
    bpy.ops.mesh.primitive_cylinder_add(
        vertices=64,
        radius=rib_radius_innter*1.5,
        depth=rib_tickness,
        end_fill_type='NGON',
        view_align=False,
        enter_editmode=True,
        location=(0, 0, 0),
        rotation=(0, 0, 0),
        layers=(True, False, False, False, False, False, False, False, False, False,
                False, False, False, False, False, False, False, False, False, False)
    )
    obj = get_active_object()
    obj.name = name

    objs = get_objs()
    target = objs[name]

    return target


def make_casing():

    # Case Sphere
    case_sphere = add_sphere("case_sphere")
    # case_sphere.location.x += case_radius_outer/2

    # Rib Plane 3
    rib_plane1 = add_circle_plane("rib_plane1")
    rib_plane2 = add_circle_plane("rib_plane2")
    rib_plane2.location.z += case_radius_outer/2
    rib_plane3 = add_circle_plane("rib_plane3")
    rib_plane3.location.z -= case_radius_outer/2
    # Triming for  Rib Plane
    tmp_sphere_shell = add_sphere_shell(
        case_radius_outer-case_tickness/10., "tmp_shell")
    intersect(rib_plane1, tmp_sphere_shell, False)
    intersect(rib_plane2, tmp_sphere_shell, False)
    intersect(rib_plane3, tmp_sphere_shell, True)

    target = union(case_sphere, rib_plane1)
    target = union(case_sphere, rib_plane2)
    target = union(case_sphere, rib_plane3)

    # Triming Inner Sphere
    tmp_inner_shell = add_sphere_shell(
        radius=rib_radius_innter, name="tmp_inner_shell")

    difference(case_sphere, tmp_inner_shell)


    # D A N M E N
    bpy.ops.mesh.primitive_cube_add(
        radius= 1,
        view_align=False, 
        enter_editmode=True, 
        location=(1, 0, 0),
        )
    obj=get_active_object()

    difference(case_sphere, obj)

# ***************************************
# main
# ***************************************

if __name__ == '__main__':
    delete_all()

    make_casing()

    os = bpy.data.objects
    for o in os:
        print(o)