Hi Luki,
Welcome to yt! Sorry you're having trouble.
I was able to get it to work by adding this line:
surf["Density"]
just after surf=
I believe this is a genuine bug, as what I think is going on is that
the triangles are not getting created properly. Once that line went
in, yt would go and walk the surface and create the vertices. I don't
know why it's not doing that by default, so I have filed a bug to
ensure that it gets addressed:
https://bitbucket.org/yt_analysis/yt/issue/633/vertices-not-correctly-create...
You may also find it a bit nicer if you use "pf.h.all_data()" instead
of the sphere, as the sphere will cut off any data outside that
spherical region. Anyway, try with the line surf["Density"] before
the export, and let us know if that works.
-Matt
On Tue, Aug 20, 2013 at 1:42 PM, Lucky Puspitarini
Hello all,
My name is Luki. I'm new in yt.
I have a problem in extracting object from yt. I want to have the surface object in .obj or .ply file so then i can transform it to .u3d for 3d pdf
I have a data cube that i build this way.
from yt.mods import *
from numpy import *
myfile=loadtxt("3ddata_300_lowerres.txt")
dens=myfile[:,3]
densitycube=dens.reshape(61,61,61)
mydata=dict(Density=densitycube)
bbox=np.array([[-300,300],[-300,300],[-300,300]])
pf=load_uniform_grid(mydata,densitycube.shape,3.08e18,bbox=bbox)
Then, I would like to have a surface of certain value in my data and extract it to .obj files
sp = pf.h.sphere("center", (250, "pc"))
trans = 1.0
distf = 3.08e18
surf = pf.h.surface(sp, "Density", 0.0006)
surf.export_obj("myism.obj", transparency=trans, dist_fac = distf)
But i have a problem with segmentation fault.
Segmentation fault: 11
I'll also try export_ply but i have the same problem :(
sp = pf.h.sphere("center", (250, "pc"))
surf = pf.h.surface(sp, "Density", 0.0006)
bounds = [(sp.center[i] - 125.0/pf['pc'],sp.center[i] + 125.0/pf['pc']) for i in range(3)]
surf.export_ply("myism.ply",bounds=bounds)
Can you help me?
Thankyou in advance
Best regards, luki
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