Blender 2.8, Python 立方体 拡大縮小

Blender 2.8, Python。 立方体の傾き、拡大縮小までたどり着いたというところ。傾けて薄っぺらい形状にしたら心なしかスマートフォン的な形に見えてきました。これまで達成したのは、立方体配置、マテリアル割付、カメラ移動と照明移動。（今後の課題はカメラ角度、カメラの特定座標の注視とか物体移動の際のパス沿線移動など。）

動画はtwitter投稿の Blender 2.8, Python
[Blender 2.8, Python。動画1秒。 立方体の傾き...](https://twitter.com/naohiko7/status/1298434564113612800)

（2024.5.5追記。blender 4.1.1向けにスクリプト書き換えた記事を作りました。
[「Blender 4.1, Python 立方体拡大縮小」](https://qiita.com/naohiko7/items/eeb82bde180cfd1802a7) ）

![bpynh12scrn.png](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/690216/914fafcf-3787-cc58-d2f2-5983d1d794d7.png)



```python3
#bpy_nh12   立方体の拡大縮小、傾き追加。（カメラ移動。照明4個移動 ）
import bpy
# 既存 mesh, light, camera, みな削除
for item in bpy.data.objects:
	bpy.data.objects.remove(item)

#立方体 original script は  ---- http://tips.hecomi.com/entry/20120818/1345307205
#拡大参考資料 tatsuruM Qiita https://qiita.com/tatsuruM/items/9d4222c6c7d96b4c5b3c

START = 0
END   = 100
N     = 4

# Add color cubes
for x in range(0, N):
    for y in range(0, N):
        for z in range(0, N):
            # Add a color cube
            bpy.ops.mesh.primitive_cube_add( location=(x*3, y*3, z*3),size = (1.2) )
            bpy.ops.transform.resize(value=(0.8, 0.1, 2.0))
            bpy.ops.transform.rotate(value= -3.1415/6 ,orient_axis='X')
            #obj = bpy.context.scene.objects.active #(old blender2.7script)
            obj = bpy.context.view_layer.objects.active
            #mat.diffuse_color = (x/N, y/N, z/N)#(old blender2.7script)
            mat = bpy.data.materials.new('Cube')
            mat.diffuse_color = (x/N, y/N, z/N, 0)
            #mat.use_transparency = True #(この行は2.8で試していない)
            #mat.alpha = 0.6 #(この行は2.8で試していない)
            obj.data.materials.append(mat)

# new camera
bpy.ops.object.add(radius=1.0, type='CAMERA', enter_editmode=False, align='WORLD', location=(20.0, -6.0, 8.0), rotation=(1.4, 0.0, 1.2))
# =========== camera movement 
bpy.data.objects['Camera'].select_set(True)

cdnow  = bpy.context.scene.objects["Camera"]    # get ACTIVE object 

bpy.context.scene.frame_current = 1 # set frame to 1
cdnow.location = (20.0, -6.0, 8.0) # set the location
bpy.ops.anim.keyframe_insert_menu(type='Location') # KEY FRAME

bpy.context.scene.frame_current = 10 # set frame to 10
cdnow.location = (20.0, -4.0, 9.0) # set the location
bpy.ops.anim.keyframe_insert_menu(type='Location') # KEY FRAME

bpy.context.scene.frame_current = 20 # set frame to 20
cdnow.location =  (22.0, -4.0, 10.0)
bpy.ops.anim.keyframe_insert_menu(type='Location') # KEY FRAME

bpy.context.scene.frame_current = 30 # set frame to 30
cdnow.location = (20.0, -6.0, 8.0)
bpy.ops.anim.keyframe_insert_menu(type='Location') # KEY FRAME

bpy.data.objects['Camera'].select_set(False)
#  ==================

# new lamps （出典 stack overflow Can you add a light source in blender using python)
# =============="light_spot3"
# create light datablock, set attributes
light_data = bpy.data.lights.new(name="light_spot3", type='SPOT')
light_data.energy = 2000
# create new object with our light datablock
light_object = bpy.data.objects.new(name="light_spot3", object_data=light_data)
# link light object
bpy.context.collection.objects.link(light_object)
# make it active 
bpy.context.view_layer.objects.active = light_object
#change location
light_object.location = (2, -2, 3)
light_object.delta_rotation_euler = (1.6, 0, 0) #ゼロゼロゼロで真下を向く。
# update scene, if needed
dg = bpy.context.evaluated_depsgraph_get() 
dg.update()


# =============="light_spot2"
# create light datablock, set attributes
light_data = bpy.data.lights.new(name="light_spot2", type='SPOT')
light_data.energy = 2000
# create new object with our light datablock
light_object = bpy.data.objects.new(name="light_spot2", object_data=light_data)
# link light object
bpy.context.collection.objects.link(light_object)
# make it active 
bpy.context.view_layer.objects.active = light_object
#change location
light_object.location = (2, -4, 10)
light_object.delta_rotation_euler = (1.5, 0, 0) #ゼロゼロゼロで真下を向く。
# update scene, if needed
dg = bpy.context.evaluated_depsgraph_get() 
dg.update()
# ============== "light_spot1"
# create light datablock, set attributes
light_data = bpy.data.lights.new(name="light_spot1", type='SPOT')
light_data.energy = 3000
# create new object with our light datablock
light_object1 = bpy.data.objects.new(name="light_spot1", object_data=light_data)
# link light object
bpy.context.collection.objects.link(light_object1)
# make it active 
bpy.context.view_layer.objects.active = light_object1
#change location
light_object1.location = (5, -5, 10)
light_object1.delta_rotation_euler = (1.3, 0, -0.3) #ゼロゼロゼロで真下を向く。
# update scene, if needed
dg = bpy.context.evaluated_depsgraph_get() 
dg.update()
# ================

#  MOVE a SPOT LIGHT  スポット照明移動 "light_spot1"
bpy.context.scene.frame_start = 1
bpy.context.scene.frame_end = 30
bpy.context.scene.frame_current = 10
# make light ACTIVE 
bpy.context.scene.objects["light_spot3"].select_set(False) # ----- deselect
bpy.context.scene.objects["light_spot2"].select_set(False) # ----- deselect
bpy.context.scene.objects["light_spot1"].select_set(True) #---- select

cdnow  = bpy.context.object          # get ACTIVE object 
bpy.context.scene.frame_current = 1 # set frame to 1
cdnow.location = (5, -6, 8) # set the location
bpy.ops.anim.keyframe_insert_menu(type='Location') # KEY FRAME

bpy.context.scene.frame_current = 10 # set frame to 10
cdnow.location = (5, -6, 10) # set the location
bpy.ops.anim.keyframe_insert_menu(type='Location') # KEY FRAME

bpy.context.scene.frame_current = 20 # set frame to 20
cdnow.location = (2, -6, 10)
bpy.ops.anim.keyframe_insert_menu(type='Location') # KEY FRAME

bpy.context.scene.frame_current = 30 # set frame to 30
cdnow.location = (5, -6, 8)
bpy.ops.anim.keyframe_insert_menu(type='Location') # KEY FRAME
# ================
#  MOVE a LIGHT  mesh with KEY FRAME spot 2 照明の移動  light_spot2
bpy.context.scene.frame_start = 1
bpy.context.scene.frame_end = 30
bpy.context.scene.frame_current = 10

# make POINT  light ACTIVE 

bpy.context.scene.objects["light_spot3"].select_set(False) # ----- deselect
bpy.context.scene.objects["light_spot1"].select_set(False) # ----- deselect
bpy.context.scene.objects["light_spot2"].select_set(True) #---- select

#cdnow  = bpy.context.object          # get ACTIVE object 
cdnow  = bpy.context.scene.objects["light_spot2"]    # get ACTIVE object 

bpy.context.scene.frame_current = 1 # set frame to 1
cdnow.location = (1,-4,1) # set the location
bpy.ops.anim.keyframe_insert_menu(type='Location') # KEY FRAME

bpy.context.scene.frame_current = 10 # set frame to 10
cdnow.location = (1,-4,3) # set the location
bpy.ops.anim.keyframe_insert_menu(type='Location') # KEY FRAME

bpy.context.scene.frame_current = 20 # set frame to 20
cdnow.location = (4,-4,3)
bpy.ops.anim.keyframe_insert_menu(type='Location') # KEY FRAME

bpy.context.scene.frame_current = 30 # set frame to 30
cdnow.location = (1,-4,1)
bpy.ops.anim.keyframe_insert_menu(type='Location') # KEY FRAME
#  ==================
#  MOVE a LIGHT  mesh with KEY FRAME spot 3 照明の移動  light_spot3
bpy.context.scene.frame_start = 1
bpy.context.scene.frame_end = 30
bpy.context.scene.frame_current = 10

# make POINT  light ACTIVE 

bpy.context.scene.objects["light_spot2"].select_set(False) # ----- deselect
bpy.context.scene.objects["light_spot1"].select_set(False) # ----- deselect
bpy.context.scene.objects["light_spot3"].select_set(True)   #---- select

#cdnow  = bpy.context.object          # get ACTIVE object 
cdnow  = bpy.context.scene.objects["light_spot3"]    # get ACTIVE object 

bpy.context.scene.frame_current = 1 # set frame to 1
cdnow.location = (5,-6,1) # set the location
bpy.ops.anim.keyframe_insert_menu(type='Location') # KEY FRAME

bpy.context.scene.frame_current = 10 # set frame to 10
cdnow.location = (9,-6,1) # set the location
bpy.ops.anim.keyframe_insert_menu(type='Location') # KEY FRAME

bpy.context.scene.frame_current = 20 # set frame to 20
cdnow.location = (9,-6,5)
bpy.ops.anim.keyframe_insert_menu(type='Location') # KEY FRAME

bpy.context.scene.frame_current = 30 # set frame to 30
cdnow.location = (5,-6,1)
bpy.ops.anim.keyframe_insert_menu(type='Location') # KEY FRAME
#  ==================


# world - surface - background (背景) 
bpy.data.worlds["World"].node_tree.nodes["Background"].inputs[0].default_value = (0.01, 0.15, 0.25, 1)
bpy.data.worlds["World"].node_tree.nodes["Background"].inputs[1].default_value = 0.7            
#=====


```