Python - Bulk Add Points
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
Hi, if you just want to create a mesh with given points (and faces) you can directly do something like this: mesh = om.TriMesh(np.random.rand(1000,3)) It would probably make sense to expose functions that allow adding point (and face) arrays to an existing mesh. Best, - Isaak Lim On 30.10.19 18:15, Jesse Vander Does 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 <mailto:jvanderdoes@gmail.com>
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-- Isaak Lim, M.Sc. RWTH Aachen University Visual Computing Institute Graphics, Geometry and Multimedia Ahornstraße 55 52074 Aachen Room 109 Phone: +49 241 8021805
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<mailto: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<mailto:jvanderdoes@gmail.com> _______________________________________________ OpenMesh mailing list -- openmesh@lists.rwth-aachen.de<mailto:openmesh@lists.rwth-aachen.de> To unsubscribe send an email to openmesh-leave@lists.rwth-aachen.de<mailto:openmesh-leave@lists.rwth-aachen.de> https://lists.rwth-aachen.de/postorius/lists/openmesh.lists.rwth-aachen.de
participants (3)
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Dielen, Alexander Michael -
Isaak Lim -
Jesse Vander Does