New subject: Python - Bulk Add Points

18 Jun 2020

      Hey Alex,

Sorry to bring this email thread back from the dead. Any chance you could
publish this latest work to pip?

Best regards,
Jesse

On Wed, Nov 13, 2019 at 5:35 PM Dielen, Alexander Michael <
alexander.dielen@rwth-aachen.de> wrote:
...
Hi,
our intention was to hide the StatusInfo class from python, but this made
it impossible to mark vertices as locked.
I added a way to specify locked vertices like this:
mesh = om.read_trimesh("bunny.stl")
for vh in mesh.vertices():
    if mesh.point(vh)[2] > 0:
        mesh.set_vertex_property("locked", vh, True)
decimater = om.TriMeshDecimater(mesh)
mod = om.TriMeshModQuadricHandle()
decimater.add(mod)
decimater.initialize()
decimater.decimate(10000, locked_vertex_propname="locked")
mesh.garbage_collection()
om.write_mesh("decimated_bunny.ply", mesh)
Best regards,
Alex
------------------------------
*From:* Jesse Vander Does <jvanderdoes@gmail.com>
*Sent:* Thursday, October 31, 2019 4:59:51 PM
*To:* Dielen, Alexander Michael
*Cc:* openmesh@lists.rwth-aachen.de
*Subject:* Re: [OpenMesh] Python - Bulk Add Points
Wow, thank you! That worked great. Those methods have made it really easy
to move between OpenMesh and TriMesh (https://trimsh.org/) which provides
more import options and a scene graph. Combining these two libraries really
makes for a very powerful python API.
My goal is to use OpenMesh for decimation. The next thing I bumped into
was that the python API appears to have removed
<https://www.graphics.rwth-aachen.de:9000/OpenMesh/openmesh-python/commit/eceb478a64d702f44577cf5a858abe47c8d963cd>
the ability to "lock
<https://www.openmesh.org/media/Documentations/OpenMesh-6.1-Documentation/a00004.html>"
vertices. Do you know if there is a new way of doing so or why that
functionality was removed?
<https://www.graphics.rwth-aachen.de:9000/OpenMesh/openmesh-python/commit/eceb478a64d702f44577cf5a858abe47c8d963cd>
Best regards,
Jesse
On Thu, Oct 31, 2019 at 5:15 AM Dielen, Alexander Michael <
alexander.dielen@rwth-aachen.de> wrote:
...
Hi,
I added the functions Isaak mentioned earlier. If you build from source,
there are now three ways to add vertices and faces to a mesh using numpy
arrays:
1. Using the mesh constructor as described by Isaak: mesh =
om.TriMesh(points, face_vertex_indices). Here points is an array of vertex
coordinates with shape (n, 3) and face_vertex_indices is an array of vertex
indices with shape (m, 3) where each row defines a triangle.
2. By passing an array of vertex coordinates to mesh.add_vertices() or by
passing an array of face_vertex_indices to mesh.add_faces().
3. By first calling mesh.resize_points(n) and then directly modifying the
array returned by mesh.points().
Best regards,
Alex
On 30. Oct 2019, at 18:15, Jesse Vander Does <jvanderdoes@gmail.com>
wrote:
Hello OpenMesh,
I would like to be able to quickly copy a numpy array of vertices and
faces into a TriMesh. After some digging I found this task
https://www.graphics.rwth-aachen.de:9000/OpenMesh/openmesh-python/issues/18 which
suggests assigning multiple points by doing `m.points()[:] = p`. I can't,
however, figure out how to resize the points array without using
`add_point` or `new_vertex`.
Any help would be much appreciated.
As an aside, it would be great to be able to post and comment on issues.
Is there a reason the project is managed such that gitlab project is
readonly?
Best regards,
--
Jesse Vander Does
424-465-0285 | jvanderdoes@gmail.com
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--
Jesse Vander Does
424-465-0285 | jvanderdoes@gmail.com
-- 
Jesse Vander Does
424-465-0285 | jvanderdoes@gmail.com

Re: Python - Bulk Add Points

Jesse Vander Does

Isaak Lim

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