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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6 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:
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2answers
117 views
Help modeling this dome
I am very new to blender and still using 2.78, I have this idea in my head and but can't think of how to model a dome shape with a cross on top if that makes sense. I attached a sketch of how I want ...
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1answer
28 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:
...
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23 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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2answers
33 views
BMesh: Accessing edges of created mesh
Let’s say I created a bunch of these cones in my_bmesh object:
c = bmesh.ops.create_cone(my_bmesh, segments=8, diameter1=1, diameter2=1, cap_ends=True)
Is there ...
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1answer
38 views
How to scale plane 2d with bmesh and floatproperty in ui?
THe classic method of scale 2d object is like to
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1answer
27 views
Creating bmesh from an object: why is scale ignored?
I notice that when you create a bmesh from an object using
bm = bmesh.new()
bm.from_mesh(obj.data)
the scale of the object is ignored, in the sense that you get ...
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0answers
25 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
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1answer
43 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 ...
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15 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 ...
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1answer
38 views
Select multiple vertices using a list of coordinates with KDTree
I want to select (or to put into active selection) some vertices using their coordinates so I've seen an answer there :
Automatic select vertices by given coordinates
But it only works when I'm in ...
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31 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....
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1answer
24 views
Way to get vertex index to use in new vertex group from selected faces
I try and not undertand if i am on the right way, that code i want to set the select
faces, make a vertex group, this is a piece of code:
...
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3answers
65 views
Mesh reverts back to the state before the script was run
I created a script (operator) that converts a selection of quads into a diamond pattern.
It works fine but when I try to Inset the newly created selection and change any of the options (like ...
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10 views
How to get list of vertices edges, which border on 2 or more different types of material / uv in bmesh? (2.79)
I try to find that in the api ,but I couldn't find. I try with the bmesh.ops.dissolve_limit method, but not work fine ,does not save all the borders bordering with ...
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1answer
130 views
Setting mesh's origin in python (2.8)
If I create a cube, the origin is originally at the center of mass. I know how to move the origin to the center of one of its faces using the interface, but how can I do the same thing via Python?
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1answer
28 views
Bmesh bevel is inverted
This looks cool and all, but it's beveled in the wrong direction. How can I flip the direction it bevels, so it looks more like a rounded cube, rather than a rounded plus-sign?
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0answers
27 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'...
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22 views
bmesh.ops.dissolve_limit trouble about “delimit” option with set in 2.79
I checked the api for this but I have to say that what I'm looking for is poorly documented:
Limited dissolve have 5 options with multiple selection
blender 2.79 : Normal, Material,Seam, Sharp, UVs
in ...
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19 views
bmesh.ops.dissolve_limit not work fine?
I tried to emulate "limited dissolve" with bmesh, but it behaves differently from the various parameters in blender 2.79, delimit mode (in 2.79 with integer value and in 2.8 with string)
Result by "...
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1answer
28 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 ...
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1answer
143 views
Align Object A to Object B to their respective active faces with python
i want to Align two objects depending on their active faces like in this gif below
didn't find any answers but only this clue below from this question:
Align to face normal vector
but it only align ...
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0answers
24 views
How to know if certain co-planar faces in Blender form a circle to apply quads later on?
I can get a set of co-planar faces from any mesh. Some of these co-planar faces form a circle while most of them do not. I eventually want to know which faces are forming a circle using Python, so ...
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1answer
62 views
how can i quickly optimize this mesh out from a curve?
this is a hair that i have done for my character there, so its made out from a curve, after convert it to mesh, it gave me too much verts or poly count, i need to optimize it, i tried the unsubdivide ...
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23 views
Add faces to a mesh to make it solid with python and bpy
Basically what I want to do is subdividing a mesh in a lot of smaller meshes, all of them sharing the same the bounding box dimensions.
Using bmesh.ops.bisect_plane...
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37 views
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1answer
34 views
How to create a list containing lists of bm.verts based on their deform layer (vertex group)?
I have been struggling with trying to find a way to do this. It's related to my previous efforts here:
How to get list of bm.verts that belong to a deform layer?
When I do this
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1answer
35 views
I Can't Create a Face from Several Circles
Just like the problem appears in the image, I want to make a face triangulated around all circles. Instead, a face is created that overlaps everything I selected. What its the technique to join all of ...
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1answer
70 views
Finding a specific face/vertex/edge based on position value, not indices value
[Looking for answers possible via python]
Hi everyone!
I'm trying to select a face/vertex/edge based on location rather than selecting it based on its specific index. After the specific face/vertex/...
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1answer
148 views
Change circle segment depends on diameter
I want to program a tool for checking radial parts of a mesh.
The idea is:
You push a button, the scripts add an object (circle) to the scene.
Then you grab it place it and when you scale this circle ...
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1answer
39 views
How to get list of bm.verts that belong to a deform layer?
I have a previously assigned Vertex Groups on my object. After creating the bmesh, if I understand correctly that Vertex Group should now be ...
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0answers
97 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:
...
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1answer
44 views
Should I convert my quad mesh to triangles? If so, can I do it in this script?
I have topographical data which is height on a square lat/lon grid and I've generated a mesh with the script shown below. My polygons are all quadrangles (close to, but not quite squares in this case) ...
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1answer
69 views
Overlapping faces : how to create new faces (interception and complements) with Python API?
Suppose I have a mesh with two overlapping faces (in general, all vertices are different):
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17 views
Regular Bmesh operators
I'm new to Bmesh and Blender in general, but I would like to know if there's an equivalent for the knife tool in Bmesh. Long story short, I want to do a very regular mesh over a mesh plane; only ...
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1answer
108 views
Bmesh : how do I keep track of vertices in edited topology?
I'm trying to write a script to bisect Ngon rectangles, horizontally or vertically, at a given percentage of the distance along their sides. (The sides may consist of more than one edge).
Some of the ...
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1answer
29 views
Delete components script crashes
I wrote an addon that removes components (using BMesh) depending on the context of the selection. The problem is that he crashes a Blender. I cannot establish a pattern, but most often this happens ...
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1answer
73 views
Boolean on two simple bmesh
I'm a newbie in blender and I'm trying to play around with the boolean difference modifier.
I have two concentric disks and I want to perform the boolean differece between them. I'm using the python ...
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2answers
42 views
Argument values in `bmesh.ops.similar_verts()`
Can someone please help me understand the values for the arguments in the function bmesh.ops.simlar_verts(bm, verts, type, thresh, compare)
I understand that:
<...
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1answer
153 views
How to update Blender's naming index thing (.001, .002, etc.) after joining objects
I've been trying to reuse certain parts of code as functions in my bpy scripts. But that means that the same bmesh will be created as 'my_bmesh.001' the next time I run that function. To deal with ...
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58 views
What happened to my straight lines in 2.8?
I modeled these letters in 2.7 no problem. I just brought them into 2.80 and the straight lines have this "back forth" look along the geometry.
The normals are all outside, I tried to re-do the ...
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20 views
Python bmesh.update_edit_mesh() doesn't work as I expect
I've been doing something like:
cube = bmesh.ops.create_cube(bm)
bmesh.update_edit_mesh(mesh)
print(mesh.vertices)
The return is ...
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0answers
33 views
How select Material Slot with one active face in python
hello guys i have a problem by selecting the material slot.
when selecting the material slot, has no active Face...
how can i make him select an active Face under the selected Faces ?
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15 views
Is there a way to create multiple bmverts from a list of 3d coordinates in bulk (ie not calling vert.new for each coordinate)
I would like to bulk transfer a list of hundreds of thousands of 3d coordinates into a bmesh (using python) and the only way seems to be to add them one bmvert at a time with vert.new(coord).
I am ...
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1answer
33 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 ...
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0answers
39 views
How to create Modal Operator that extrudes, moves and rotates selected in Edit Mode?
I'm trying to learn about modal operators in blender. I'm a complete novice and I'm struggling with the idea of how to correctly map the mouse movement onto the bmesh operators.
I'm essentially ...
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0answers
82 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 ...
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1answer
66 views
Uniquely addressing vertices in python
This has been driving me crazy for some time, because it seems so simple, but I just cannot find a way to do it despite exhaustive searching. Say I'm in bmesh, and I create a vertex, and I add it to ...
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0answers
35 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 ...
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0answers
74 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 ...
