Blender 2.8, Python Cube, Lighting, Camera Circumference
This time the theme is camera movement. Youtube video "Blender 2.8 Set Up a Camera Rig and Animate On A Path" that introduces camera movement along the circumference This (up to 6m50sec in the first half) is made into a Python script. Z-axis movement I haven't done it yet. (bpy_nh13)
The video is this from twitter
blender 2.8, python. 1-second movie. 242kB. Camera movement along a circle.
The offset factor is related to [Insert keyframe to object's Offset Factor Python API]
I read and referred to (https://blender.stackexchange.com/questions/185082/insert-keyframe-to-objects-offset-factor-python-api)
Camera motion along a circle. I have made this Python script based on "Blender 2.8 Set Up a Camera Rig and Animate On A Path".
# bpy_nh13 Cube movement of lighting movement in the first half(First half nh12)Second half camera installation and camera circumference movement(Second half nh14)
import bpy
# DELETE ALL mesh, light, camera,2 lines to delete all
for item in bpy.data.objects:
bpy.data.objects.remove(item)
#Cube original script---- http://tips.hecomi.com/entry/20120818/1345307205
#Enlarged reference material 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 #(This line is 2.Not tried in 8)
#mat.alpha = 0.6 #(This line is 2.Not tried in 8)
obj.data.materials.append(mat)
# ====== camera (later) ==================
# new lamps （ 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) #Look straight down at zero zero zero.
# 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) #Look straight down at zero zero zero.
# 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) #Look straight down at zero zero zero.
# update scene, if needed
dg = bpy.context.evaluated_depsgraph_get()
dg.update()
# ================
# MOVE SPOT LIGHTs "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 Light movement 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 Moving 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 (background)
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
# ================== ================= camera movement
#bpy.ops.mesh.primitive_monkey_add(size=2, enter_editmode=False, align='WORLD', location=(0, 0, 0))
bpy.ops.curve.primitive_bezier_circle_add(enter_editmode=False, align='WORLD', location=(0, 0, 0))
bpy.context.object.scale[0] = 6
bpy.context.object.scale[1] = 6
bpy.ops.object.empty_add(type='CUBE', align='WORLD', location=(0, 0, 0))
bpy.ops.object.camera_add(enter_editmode=False, align='VIEW', location=(0, 0, 0), rotation=(0, 0, 0))
bpy.data.objects['Empty'].select_set(True)
bpy.data.objects['Camera'].select_set(True)
bpy.context.view_layer.objects.active = bpy.data.objects['Empty']
bpy.ops.object.parent_set(type='OBJECT')
bpy.data.objects['Camera'].select_set(False)
bpy.data.objects['Empty'].select_set(True)
bpy.ops.object.constraint_add(type='FOLLOW_PATH')
bpy.context.object.constraints["Follow Path"].target = bpy.data.objects["BezierCircle"]
bpy.context.object.constraints["Follow Path"].use_curve_follow = True
bpy.context.object.constraints["Follow Path"].use_fixed_location = True
bpy.data.objects['Empty'].select_set(False)
bpy.data.objects['Camera'].select_set(True)
bpy.ops.object.constraint_add(type='TRACK_TO')
#bpy.context.object.constraints["Track To"].target = bpy.data.objects["Suzanne"]
bpy.context.object.constraints["Track To"].target = bpy.data.objects["Cube.016"]
bpy.context.object.constraints["Track To"].up_axis = 'UP_Y'
bpy.context.object.constraints["Track To"].track_axis = 'TRACK_NEGATIVE_Z' #5m00sec
#Camera Keyframe #(Insert keyframe to object's Offset Factor Python API - stack exchange)
bpy.data.objects['Camera'].select_set(False)
bpy.data.objects['Empty'].select_set(True)
bpy.context.scene.frame_current = 1
bpy.context.object.constraints["Follow Path"].offset_factor = 0
ob = bpy.context.object
# ob.constraints['Follow Path']
# bpy.data.objects['Empty'].constraints["Follow Path"]
# [bpy.data.objects['Empty'].constraints["Follow Path"]]
con = ob.constraints.get("Follow Path")
con.offset_factor = 0.0
con.keyframe_insert("offset_factor", frame=1)
con.offset_factor = 0.1
con.keyframe_insert("offset_factor", frame=8)
con.offset_factor = 0.15
con.keyframe_insert("offset_factor", frame=16)
con.offset_factor = 0.2
con.keyframe_insert("offset_factor", frame=18)
con.offset_factor = 0.0
con.keyframe_insert("offset_factor", frame=30)
# ===== end of bph_13 (2020.8.28)
Recommended Posts