trimesh/Lobby

Mihai ANDRIES

@science-code

@mikedh I use this:

# Example: https://github.com/mikedh/trimesh/issues/115#issuecomment-351866100
data = mesh.scene().save_image(resolution=[1480,1480], visible=False)
rendered = Image.open(trimesh.util.wrap_as_stream(data))
rendered.show()

$ pip show pillow
Version: 7.0.0
Required-by: scikit-image, imageio

Name: scikit-image
Version: 0.15.0

Name: imageio
Version: 2.8.0

Michael Dawson-Haggerty

@mikedh

hmm if anything I would suspect a recent pyglet upgrade for this

they released recently

Mihai ANDRIES

@science-code

@mikedh it seems that the error comes from this part:

data = scene.save_image(resolution=[480,480], visible=True) #False)

It works with "visible=True", but does not work with "visible=False".
Moreover, even with "visible=True", the first mesh image is completely black.

Mihai ANDRIES

@science-code

@mikedh Any ideas from where this might come?

Mihai ANDRIES

@science-code

Currently using this alternative, which has the same fault (every once in a while, a mesh image is just black):

Alternative code for generating a mesh-image

from trimesh import viewer as trimesh_viewer

...

data = trimesh_viewer.render_scene(mesh.scene(), resolution=[480,480], visible=True)

I suppose it also slows down image generation, due to "visible=True".

ChrisCarragher

@ChrisCarragher

@mikedh Thank you!

Mihai ANDRIES

@science-code

@mikedh I would be grateful for any suggestion you may have :-)

Michael Dawson-Haggerty

@mikedh

Hey, whether visible=False works depends a lot on your platform: mikedh/trimesh#125

Jason McInerney

@wwwslinger

Hi. I can't find this anywhere, but my goal is to take an STL of a non-uniformly curved surface and determine how to cut a flat sheet to cover it with as few segments as possible. Any thoughts on how to approach it using trimesh?

Mihai ANDRIES

@science-code

@wwwslinger if your object is convex, you could use a convex envelope.

@wwwslinger another alternative would be to simplify the mesh while enforcing constraints on its surface. You can use the "Decimate" function of MeshLabServer for this.

@mikedh It used to work with visible=False, but stopped since I installed some python packages. The platform is the same as before, so this isn't the issue. I've tried to identify which python package broke the mesh-image generation, but in vain.

Jason McInerney

@wwwslinger

It is convex @science-code , thanks. Simplifying would be cool, too, since it does has some structure past the surface edges that I need to somehow cut off

@science-code I can seem to find Decimate in there, just ParaDecimate -- is that the same? Do you have link to an example perhaps?

Mihai ANDRIES

@science-code

@wwwslinger here's a python code that does the simplification down to 2000 triangles in the final mesh:

https://gitlab.com/mandries/mesh-decimation/-/blob/master/mesh_simplify.py

You need to install meshlab for that work.
To change the number of triangles in the final mesh, edit the value on line 21:

Jason McInerney

@wwwslinger

@science-code thanks for the script. I tested it out, but am getting a not found for the Remove Unreferenced Vertex Filter. Is there a default somewhere that I can plug in?

Mihai ANDRIES

@science-code

@wwwslinger Try to remove that line, it will probably work without it.
To have the exact code for any operation on the mesh in MeshLab, go to "Filter > Show current filter script".
See the exact name of the operation in your version of MeshLab, as use that one instead.

Those filters are just for cleaning the mesh.

Giacomo Vianello

@giacomov

Hi, I am looking for a simple way to solve this problem in python: I have a mesh of a roof. The real object is composed of planes intersecting at sharp angles. However, the mesh I have has several thousand faces. I am looking for a way to merge all adjacent faces whose normals are within a certain angle. In other words, I want to merge all nearly coplanar faces. Is there a trimesh way of doing this? I was looking at trimesh.grouping.group_vectors, but I don't know how to enforce connectivity and also I don't know how to merge the groups.

jaredsagendorf

@jaredsagendorf

Hello all, I want to compute the mean/gaussian curvature over a mesh and I'm looking at the curvature.ipynb example with the following code: discrete_gaussian_curvature_measure(mesh, mesh.vertices, r)/sphere_ball_intersection(1, r)
But I don't really understand what the sphere_ball_intersection(1,r) call is about... what exactly is this example showing? Can I use this to calculate curvature at every vertex for an arbitrary mesh? How would I know what value of r to use?

PedroLopes211

@PedroLopes211

Hello. For my project, I need to measure the distance between two STL files. I wrote a script that allows reading the files, positioning them in relation to each other in the desired position . I saw the module Trimesh.collision because it looks like a mesh - mesh comparer . So I tried to use min_distance_single to "get the minimum distance between any pair of objects, one in each manager" but I receive and error like this

Captura de ecrã 2020-04-13, às 11.19.46.png

I tried to upload a mesh from a .stl file (ASCII) . I discover this library recently, is there a module that can make me discover the distance between those two objects? I also wrote the question here: https://stackoverflow.com/questions/61159587/measure-distance-between-meshes?noredirect=1#comment108198970_61159587

Jose Juan Montes

@jjmontesl

Hi there. Just sharing something I'm working on that uses Trimesh:

https://www.youtube.com/watch?v=QaZBiMceOSo

Jose Juan Montes

@jjmontesl

https://twitter.com/jjmontes/status/1279166407578726401

ChrisCarragher

@ChrisCarragher

Hi, I am just wondering if anyone has any recommends as to how to create an interactive UI with trimesh. I want a user to be able to open a file containing multiple meshes, display the meshes and have the user select one. Currently, I can open the file and modify meshes and extract information and show meshes I'm just not sure how I would allow a user to select one. Any help would be much appreciated.

Michael Dawson-Haggerty

@mikedh

hey you might check out the glooey widget example: https://github.com/mikedh/trimesh/blob/master/examples/widget.py

ernijsyoyo

@ernijsyoyo

Hi all! I have a problem where I need to take a mesh "A" and divide it into 3 smaller, seperate meshes. I am slightly overwhelmed by the documentation and I am not sure which trimesh functions should I be using for this task. I've discovered graph.Split() (which reduced the amount of original vertices..?), Submesh() or trimesh.remesh.Subdivide()

Also is the functionality available which allows to specify the number parts in which I want to subdivide my mesh? example 3, 4 or 5 equal parts?

Jose Juan Montes

@jjmontesl

As far as I know, there is no "splitting" option with the semantics you mention. Subdividing is actually adding triangles, so that's not what you are looking for.

Note that I don't know the entire API well, but as far as I know you have operations to:

split a mesh based on adjacency (so, in "separate bodies"): https://trimsh.org/trimesh.base.html#trimesh.base.Trimesh.split

split a mesh based on a cut plane: https://trimsh.org/trimesh.base.html#trimesh.base.Trimesh.slice_plane

Jose Juan Montes

@jjmontesl

create a "submesh" from another mesh by indicating the faces to use: https://trimsh.org/trimesh.base.html#trimesh.base.Trimesh.submesh

Jose Juan Montes

@jjmontesl

This may be a silly question but, how do I create a hierarchy of nodes to be exported with GLTF? I know how to add meshes to a scene, but I don't know how to create a tree of nodes with or without meshes and with different local transforms (ideally also with "extra" custom metadata).

Does someone know how to do this with Trimesh, that can share or point me to an example?

Jose Juan Montes

@jjmontesl

hello again... ^^^ anybody? I'm really struggling with this :/

Jose Juan Montes

@jjmontesl

also, I'd like to share the lightning talk (5m) about the tool I'm working on, which uses Trimesh:

Where communities thrive

People

Repo info

Activity

Alternative code for generating a mesh-image

...