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I am creating 50-100 new objects per frame, and it is very slow. I don't know which step is the slowest.

My method:

  1. Create objects.
  2. Hide all objects at frame 0.
  3. Set keyframe for objects to appear for each frame.
   import bpy
from random import random
import re

context = bpy.context
scene = context.scene
rexp = r'Sphere.\d+'


matches = [o for o in scene.objects if re.fullmatch(rexp, o.name)]
while matches:
    bpy.data.objects.remove(matches.pop())


scene = bpy.data.scenes['Scene']


idx = 0
offset = 0.07*1.2
for frame in range(1, 5):
    for x in range(5):
        for y in range(5):
            for z in range(2):


            idx += 1
            bpy.ops.mesh.primitive_uv_sphere_add(
            radius=0.035,
            location=(-0.920388+x*offset, 0.688331+y*offset, 0.744059+z*offset),
            scale=(1, 1, 1))

            bpy.ops.rigidbody.object_add(type='ACTIVE')

            obj = bpy.context.view_layer.objects.active
            bpy.context.view_layer.objects.active.rigid_body.mass = 0.0001
            bpy.context.view_layer.objects.active.rigid_body.collision_shape = 'BOX'

            obj.hide_set(True)
            obj.keyframe_insert(data_path = "hide_viewport",frame = 0)
            obj.keyframe_insert(data_path = "hide_render",frame = 0)

            obj.hide_set(False)
            obj.keyframe_insert(data_path = "hide_viewport",frame = frame)
            obj.keyframe_insert(data_path = "hide_render",frame = frame)

            print(idx, x,y)
frame += 1
Chris
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Jill Clover
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  • I would consider using some time arithmetic with time.clock_gettime_ns() and periodically (perhaps in the x loop) print your split stats. an aside: why are you incrementing frame by 1 at the bottom of its loop, when it is being incremented by the "for frame in range" also? – james_t Jan 22 '22 at 16:18
  • For speeding up the ops, eg. primitive_sphere_add, see this Q. keyframe_insert may be slow too, see this Q for a faster way. – scurest Jan 22 '22 at 16:51

1 Answers1

-1

Just for grins I added split time to your script (there was no value for offset so I made it a constant). The result was:

...198 4 3
199 4 4
200 4 4
3261094700 = sphereAddTime
908361900 = rbTime
20512800 = sframeAddTime
23995400 = printTime

OK, I should have used percentages of total! Here is the script:

import bpy
from random import random
import re 
import time

context = bpy.context
scene = context.scene
rexp = r'Sphere.\d+'


matches = [o for o in scene.objects if re.fullmatch(rexp, o.name)]
while matches:
    bpy.data.objects.remove(matches.pop())


scene = bpy.data.scenes['Scene']


idx = 0
sphereAddTime= 0
rbTime= 0
sframeAddTime= 0
printTime=0
offset=0.2
for frame in range(1, 5):
    for x in range(5):
        for y in range(5):
            for z in range(2):
                splitTime=time.time_ns()
                idx += 1
                bpy.ops.mesh.primitive_uv_sphere_add(
                radius=0.035,
                location=(-0.920388+xoffset, 0.688331+yoffset, 0.744059+z*offset),
                scale=(1, 1, 1))
                currentTime=time.time_ns()
                sphereAddTime += currentTime - splitTime
                splitTime = currentTime


            bpy.ops.rigidbody.object_add(type='ACTIVE')

            obj = bpy.context.view_layer.objects.active
            bpy.context.view_layer.objects.active.rigid_body.mass = 0.0001
            bpy.context.view_layer.objects.active.rigid_body.collision_shape = 'BOX'
            currentTime=time.time_ns()
            rbTime += currentTime - splitTime
            splitTime = currentTime

            obj.hide_set(True)
            obj.keyframe_insert(data_path = "hide_viewport",frame = 0)
            obj.keyframe_insert(data_path = "hide_render",frame = 0)

            obj.hide_set(False)
            obj.keyframe_insert(data_path = "hide_viewport",frame = frame)
            obj.keyframe_insert(data_path = "hide_render",frame = frame)
            currentTime=time.time_ns()
            sframeAddTime += currentTime - splitTime
            splitTime = currentTime

            print(idx, x,y)
            currentTime=time.time_ns()
            printTime += currentTime - splitTime
            splitTime = currentTime

frame += 1



print("{} = sphereAddTime\n{} = rbTime\n{} = sframeAddTime\n{} = printTime".format(sphereAddTime,rbTime,sframeAddTime,printTime))
james_t
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