Sequence support

[thomasediolausson]

Hi,

Thank you for the open release!

Is there support for sequence data? 4D?

[drmichaeldouglass]

Not yet but I have plans to support it

[drmichaeldouglass]

As a work around, you can import the different phases of the 4DCT in separately, one at a time. Every time you load a CT, MedBlend creates a CT.vdb file in the same directory as the CT data. Rename the CT.vdb file to something else before loading in a new CT, Phase0.vdb, phase10.vdb etc. Once you have a VDB file for each of the phases, Blender can import a VDB sequence directly. Then you will have an animated 4DCT in Blender

[thomasediolausson]

Ah yes, this makes sense. However I am dealing with 200 time frames.

My own implementation using pyopenvdb did not work directly, so I was hoping maybe to use whatever tricks you are doing.

[drmichaeldouglass]

UNOFFICIAL Hi, From the blender 3D workspace, if you select Add-->Volume-->Import OpenVDB Select all the VDB files you want to import as a sequence. Once loaded, click on the dose object so that it is selected. Click the Object Data Properties tab on the right side (green cloud icon). In the OpenVDB File section, make sure sequence is enabled and type in the number of frames that are in the 4DCT. Change mode to Ping-Pong. Hope that helps. Cheers, Michael From: Thomas Olausson ***@***.***> Sent: Thursday, 1 June 2023 5:27 PM To: drmichaeldouglass/MedBlend ***@***.***> Cc: Michael John James Douglass ***@***.***>; Comment ***@***.***> Subject: Re: [drmichaeldouglass/MedBlend] Sequence support (Issue #5) I have this dummy example inspired by your tutorial. import h5py import numpy as np import pyopenvdb as openvdb for i in range(0,15): print(i) grid = openvdb.FloatGrid() Volume = np.zeros([30,30,30]) Volume[20:30,:,2] = 0.5 Volume[:,20,10:15] = 0.5 Volume[5:10,i:i+5,5:10] = i grid.copyFromArray(Volume.astype(float)) grid.transform = openvdb.createLinearTransform([[1,0,0,0],[0,1,0,0],[0,0,1,0],[0,0,0,1]]) grid.gridClass = openvdb.GridClass.FOG_VOLUME grid.name = 'density' openvdb.write('C:/Users/thoma/test/{0:02}_volume.vdb'.format(i),grid) Viewing the individual vdb files shows that each frame is different. However, once loading all vdb files and scrolling through the timeline in Blender does not show the animation. - Reply to this email directly, view it on GitHub<#5 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AMSIJMYOKZZXW3P36BEYQDDXJBDN3ANCNFSM6AAAAAAXMRXMOE>. You are receiving this because you commented.Message ID: ***@***.***>