Questions tagged [bmesh]
Blender's new mesh system that was added in 2.63, with full support for N-sided polygons instead of only triangles and quads.
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questions with no upvoted or accepted answers
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0answers
45 views
Getting Color Values Produced by Dynamic Paint
I am having trouble with the python code to get the colors of vertices when using Dynamic Paint. If I try painting a cube using the Vertex Paint mode I can get the rgb values of the vertices using the ...
3
votes
1answer
353 views
How do I grab the active texture on a face in python?
So I'm pretty much done with designing a script to export meshes I (or others within my group) make in Blender for use in another piece of software (VoxelStudio).
Everything has been slow going due ...
3
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1answer
309 views
How to subdivide concave face into quads
I'm aware of bpy.ops.mesh.vert_connect_concave() and the result is similar to what I'm looking to implement. However, with ...
2
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0answers
43 views
bmesh from_edit_mesh points to old dead bmesh after free
I've been struggling with a bmesh problem for a while now and I can't wrap my head around it. When I free my bmesh data and try to make a new bm instance with the same object, it points to the old ...
2
votes
1answer
48 views
Reverse armature deformation on vertex in python
I have a mesh with armature modifier (active+posed) and wish to do some modifications with vert coords (after armature deformations) saved in shape key on that mesh. But currently it seems not ...
2
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0answers
104 views
Python: bmesh.verts not loading all vertices of mesh
As the title says, I am using bmesh.verts to load in all the vertices of a mesh to then check if their coordinates are within a certain box, and if they are select them. The problem is that the ...
2
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0answers
314 views
Separate mesh into separate batches with python
I am working on an export / import addon for a custom model file format which stores its geometry in the so-called "render batches", the structures aimed at optimizing geometry for effecient live ...
2
votes
0answers
18 views
split edge at multiple points without distorting uv or other data
Here's a bmesh edge:
+-----------------------------+
Say I want to cut it at multiple points, in the middle and 3/4 from the end like so:
...
2
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0answers
188 views
Why is mesh.from_pydata resulting in segmentation faults?
I have vertex and face data loaded from a cube that was subdivided many times, with a total of 26138 vertices and slightly fewer faces.
I am loading the object in a script, and whenever I try to load ...
2
votes
1answer
65 views
Bmesh: Immediately encounter strange error after adding new layer and running bmesh op
The script is simple:
...
2
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0answers
386 views
Unwrap mesh with spherical projection in python
I would like to have the same result with python as in the UI when I do unwrap > sphere projection on a mesh.
I know it's possible to use the operator ...
2
votes
0answers
183 views
Shrinkwrap with ray_cast isn't accurate
I'm trying to create my own similar Shrinkwrap-Modifier with raycast.
Unfortunately the result isn't accurate and I don't know why. It work's with Spheres, all other primitives are inaccurate.
...
2
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0answers
557 views
BMesh Grid Fill doesn't work on closed edge loop
I've been trying to automate the task of deleting the ngon cap on the end of a cylinder and replacing it with quads using the Grid Fill tool.
Something similar to this:
I'm using this script:
<...
2
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0answers
243 views
Mark Seams on Edges of Camera View
I am trying to write a script to mark a seam on an object around the vertices of the object that are in the field of view of the camera. Unfortunately, some of my ...
1
vote
0answers
11 views
Fast access to bmesh verts/edges/faces from python?
I'm trying to build a large BMesh from scratch in python. I know you can add vertices (or faces or edges) to a BMesh one at a time:
...
1
vote
0answers
23 views
How can I run Bmesh ops interactively inside an operator with a popup?
I would like to add some bmesh operators to one of my operator class. The operator has pop up menu invoked by return wm.invoke_props_dialog( self) so the values are ...
1
vote
0answers
34 views
ensure_lookup_table creates indices in random order?
I have a python script that creates a sphere, then randomly selects a face and extrudes it.
This creates new geometry and deletes the old geometry, so I need to call bm.faces.ensure_lookup_table.
...
1
vote
0answers
312 views
Blender 2.8 (Python) - how to put mesh into edit mode
For this line of code:
bm = bmesh.from_edit_mesh(mesh)
I am encountering the error 'ValueError: The mesh must be in editmode'
I am not certain how to fix this ...
1
vote
0answers
44 views
Is there any XOR option for Boolean Modifier?
Let say we got two object, I want to get the sum of the difference for calculating error between two meshes. As the sum of red and blue area following image showed:
Somehow the Boolean Modifier doesn'...
1
vote
0answers
270 views
Rotating selected vertices around given point using a matrix? (python, bmesh, modal, without bmesh.ops.rotate)
Is there a way to rotate bm.verts around a given point (another vertex, cursor etc) by multiplying v.co with Marix.Rotation and not using bmesh.ops.rotate? Like this:
...
1
vote
1answer
48 views
How to get “bpy.ops.mesh.select_more()” working for a bmesh?
When I select some meshes of my object by hand or with a script, the selection of some meshes "fades out". With "Select - Select More/Less - More) I can select these mesehs, too. But with a script I ...
1
vote
0answers
102 views
Detecting mesh overlaps of objects inside another object
How can we detect the overlap between two objects one has been placed inside the other?
I'm writing a placement algorithm and it seems regular BVH mesh overlap doesn't work for this case. Is there a ...
1
vote
0answers
48 views
How to find the distance from a face of one object to the surface of another object, along the face's normal
I feel like this has probably been answered, but I searched and couldn't find an exact solution.
What I want is a quick way to take a selected set of faces on an object (or the vertices that make up ...
1
vote
0answers
60 views
bpy.ops.bridge_edge_loops() vs bmesh.ops.bridge_loops()
Why is the bmesh bridge tool so limited?
There's no argument to control segments(number_cuts) and no argument to control interpolation.
Am I missing something? I was under the impression the bpy ...
1
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0answers
75 views
How do I remove the original faces when extruding with Bmesh?
I followed this and ended up with a closed mesh.
...
1
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0answers
235 views
Calculate a surface by checking if meshes intersect
In addition to this unresolved question, I would like to add another problem:
The main problem is that I made a few hundreds of random non overlapping circles that belong to the same mesh object, and ...
1
vote
0answers
555 views
Edge Loops and Python. Enumerating and Analysis
Does Blender Provide any Edge Loop identification in Mesh or BMesh?
If yes, what is the link or document that describe such support?
Showing edge indices of a selection. Image Above.
Crude Console ...
1
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0answers
35 views
Tris inversion from OpenGL rendering to blender internal
I create a plane, made of 2 tris, and move up one vertex to highlight the presence of the tris.
Why if I switch to blender internal renderer the tris are reversed ?
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0answers
794 views
How can I change the resting position of a rig from T-pose to A-pose
The avatar is in a T-Pose and the weighing etc. works, but I want to put it in an A, standing position so that I can more easily create clothing for it. But whenever I reposition the rig, the weights ...
1
vote
1answer
422 views
BMesh and Bevel
I'm trying to perform a bevel operation using the bmesh API. My script either crashes blender, with the error message EXCEPTION_ACCESS_VIOLATION, or it doesn't do ...
1
vote
0answers
59 views
Merging 2 BMVert's with Python
Is it possible with bmesh to specify merge together 2 BMVerts easily? Or must I do it the manual way and delete faces, remove vertices, and recreate faces at the ...
1
vote
0answers
172 views
Exclude specific vertices from selected vertices
I have a mesh, and i use 'select boundary loop' to select all the vertices on the outline of my mesh.
after that i need to exclude from this selection some vertices from a list of vertices stored in ...
1
vote
1answer
294 views
Knife tool with bmesh API
I need to find the intersection curve between two (open) meshes, and I can do that interactively with the knife tool. In search for a way to do it from a script, I came across the following highly ...
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0answers
14 views
Need help with inconsistent edge selection in python (using bmesh)
I've been writing a script for generating buildings but am running into issues with edge selection and (I suspect) bmesh. Specifically, I've written a function that determines an edge's direction ...
0
votes
1answer
40 views
Python Script - Addon; Bmesh Clean
I've purchased an Addon called 'Bmesh Clean' which basically systematically cleans up any selected mesh.
I'm trying to write my own script that will automate a process, which will include using the ...
0
votes
0answers
21 views
How to average the normals of mesh to corner angles using Bmesh
I am trying to do the same as
bpy.ops.mesh.average_normals(average_type='CORNER_ANGLE')
but using Bmesh instead, since Bmesh doesn't have a command for this i thought i would have to edit each vert ...
0
votes
0answers
20 views
Blender Script: How can I replace one vertex of a face?
I am writing an exporter addon for Blender 2.79 and I would like to know if it's possible access a face by script and replace one of its vertex by some other.
One solution that I found is creating a ...
0
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0answers
63 views
Get Face Angle values info via python
I would like to get face angle information (same information you can see when "Mesh Display->Face Info: Angle" is enabled.
I want to loop over the mesh to find triangles that fit certain angle ...
0
votes
0answers
29 views
How to retopolgise game character made of separate meshes with difficult to reach areas
I can't figure out how best to retopologise a character for a game engine when the character consists of multiple parts.
Correct me if I wrong but I believe for a game engine such as unity my ...
0
votes
0answers
18 views
Select faces inside selected edges?
How could I do this with bmesh maybe? I need to select faces inside selected edges. This works only 50% of the time and I need it to work 100%.
I'm currently selecting the weighted edges then ...
0
votes
0answers
27 views
Mesh shapes keeps changing while rigging
I have checked everything like double vertices but while mesh still keeps on changing its shape when I am trying to change the rotation of bone. Why the mesh is not retaining its shape?
UPDATE- I ...
0
votes
1answer
47 views
Mesh is Grey after adding an Image/Texture to a material
I need some help making a mesh colorful. The image I add to a material does not show up on my mesh. A snippet of the code is below
...
0
votes
0answers
20 views
Particle distribution map from cycles material data?
any ideas on how to translate cycles material to a texture/vertex distribution map ? it's for biome scattering. Preferably a non destructive way by not baking anything
Best Answers will be rewarded.
0
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0answers
27 views
Building Object, Mesh, and UV Map with Python
I am trying to learn how to create new objects from vertices and face data and also include a uv map. I used the following code:
...
0
votes
1answer
101 views
Calculate Faces from Point Cloud with Python
I have a bunch of vertices in a point cloud stored in an obj file (i can change the file if need be).
How do I calculate the faces from the point cloud using python? Example:
...
0
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0answers
40 views
BMesh: Bridge edge loops missing arguments
I'd like to connect two cylinders in bmesh using bridge edge loops. However, the bmesh.ops.bridge_loops function differs from <...
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0answers
53 views
Adding vertices to a BMesh
I am trying to create a face using bmesh. I am doing it by adding vertices to the mesh in for loop.
V_r contains the list of vertices
...
0
votes
1answer
92 views
How can we remove overlapping edges?
I am cleaning up a friend's model and often run into this problem: Often, there are multiple edges of various lengths overlapping along the same line. Below is a visual example:
...that overlap to ...
0
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0answers
29 views
Blender Python Bmesh Shapekeys
I'm currently trying to create an importer, and i'm trying to create the meshes completely via the BMesh module. Adding vertices and faces works perfectly fine so far, but for some reason, after ...
0
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0answers
83 views
Blender python subdivision problem: mistake or bug?
I've been working on a python script in Blender (2.8) and so far everything's been going fairly smoothly, except for an infuriating problem I encountered yesterday.
It seems that the 'bpy.ops.mesh....
