Hi,

Is there any project/solutions (open/close source) which is able to render VTK files natively in Mantra (preferably without having to convert the files to bgeo)?

Cheers

You can do it quite easily with a python sop. Read your vtk file , convert volume to numpy array and copy this numy array into a houdini volume .. I will search some sample code. I have lying around somewhere ..

import numpy

# This code is called when instances of this SOP cook.
node = hou.pwd()
geo = node.geometry()

# Add code to modify the contents of geo.
filePath = hou.Node.evalParm(hou.pwd(), “parmFilePath”)
infile = file(filePath,'r')
data = numpy.load(infile)
infile.close()
data = data.astype(numpy.float64)
dimensions = data.shape
xres = dimensions
yres = dimensions
zres = dimensions
volume_bbox = hou.BoundingBox(0, 0, 0,xres , yres, zres)
volume = geo.createVolume( xres, yres, zres, volume_bbox)
volume.setAllVoxels (data.flatten(order='F'))

This is the code to convert from numpy to houdini volume .. just insert before this the code to load the vtk file and copy it into a numpy array ..
I have the code to do that too somewhere, but I didnt find it just now ..

Hi Dulo,

Thanks for sharing that code! That has been massively helpful for me. In the end I reduced it slightly, do let me know if I'm missing something by cutting out some of the extra sections:


(The hou.evalParm… is a file field that I added to the python node)


Ash

ashcic
(The hou.evalParm… is a file field that I added to the python node)

you better use node.evalParm(“numpyfile”) instead of specifying it using absolute path to the parm

Thanks Tomas!