Blender 2.80 point cloud visualizer with sequence or animation?

[enzyme69]

Hi Uhlik, just wondering with Blender 2.80 is almost out of beta, would it be possible to revisit your add-on and add special feature for:

• Loading sequence of PLY point cloud data
• Ability to see and pass point cloud data with bpy (for use in Animation Nodes, Sverchok, etc)....

Thanks again!

I am happy to donate for this~

[uhlik]

hi, both looks doable, but not easy. can you elaborate a bit? i have (currently) no need for such features, so i'd like to know better how to implement it..

loading sequence - something like loading of image sequences works in compositor? you select one image, then it tries to extract some seq number from its name and to find other images in directory? you can set number of, start frame, etc. than what? preload all ply files and store in memory? each frame new batch will have to be created and filled with data might slow down things (?) also, with sequences i would disable all extra features, just display options would be left..

passing data from elsewhere - something like

from view3d_point_cloud_visualizer import PCVInterface
pcv = PCVInterface()
pcv.init() # just in case there is no draw handler
o = bpy.context.active_object
vs = [[0.0, 0.0, 1.0]]
ns = [[0.0, 0.0, 1.0]] # optional, if not available pass None
cs = [[1.0, 0.0, 0.0]] # optional, if not available pass None
pcv.draw(o, vs, ns, cs)
# ... for example each frame call with new data
pcv.erase(o) # finished

something like that would be possible even now, only in a bit messy way.. i had to write something like that in because of recent editing features, but it is meant for internal use, no data checking, some conditions are assumed, etc.

best would be start with robust data changing during runtime and than get sequence loading for free..

[uhlik]

what about this? it is already commited. to draw something

import bpy
import numpy as np
from view3d_point_cloud_visualizer import PCVControl
c = PCVControl()
c.init()
o = bpy.context.active_object
n = 100
vs = np.random.normal(0, 2, (n, 3))
ns = np.array([[0.0, 0.0, 1.0]] * n)
cs = np.random.random((n, 3))
c.draw(o, vs, ns, cs)

when finished

import bpy
import numpy as np
from view3d_point_cloud_visualizer import PCVControl
c = PCVControl()
o = bpy.context.active_object
c.erase(o)
c.reset(o)

[uhlik]

ok, sequence is in (at lest, its first and easy implementation) and script access is also finished, have a look to readme..

[uhlik]

would you try it with sverchok, animation nodes, etc? i have no experience with any of them