symmetryTable

Maya plugin to find corresponding symmetrical vertices, edges, or faces based on topological symmetry table.

This is a plugin that only creates symmetry tables and does not include any tools such as mirroring vertex positions/weights.

Tools this plugin is used with

miSymMesh

Build

for Maya2022 linux/macOS

> mkdir build
> cd build
> cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Release -DMAYA_ROOT_DIR="path/to/maya/dir" -DMAYA_VERSION=2022 ../
> cmake --build . --config Release --target install

Windows

How to use

Select the edge located in the center of the topology and run the command.

Flags

Long name(short name)	Argument types	Default	Description
vertex ( v )	boolean	true	Return vertex indices
edge ( e )	boolean	false	Return edge indices
face ( f )	boolean	false	Return face indices
half ( hf )	boolean	false	Return only vertices one side. The other side and middle vertices get -1 in return
verbose ( vb )	boolean	false	Verbose outputs

Example

from maya import cmds

vtxs = cmds.createSymmetryTable()
print(vtxs)
> [8, 7, 6, 5, 4, 3, 2, 1, 0, 19, 18, 17, 16, ... ]
#, where the corresponding vertex of the first vertex is 8, the second vertex is 7, the third is 6, and so on...

vtxs = cmds.createSymmetryTable(half=True))
print(vtxs)
> [8, 7, 6, 5, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 13, 12, 11, 10 ...
# the first to forth vertices belong to left(or right) side, vertices with -1 belong to the other side or middle

Select only left/right side of vertices

vtxs = cmds.createSymmetryTable(half=True)  # Make sure half flag is on

# Extract only one side
# In this case, key of dict is left, value is right
numVert = len(vtxs)
d = {n: int(vtxs[n]) for n in range(numVert) if vtxs[n] != -1}

# Select object
sel = cmds.ls(sl=True, fl=True, long=True)[0]
paths = ["{}.vtx[{}]".format(sel, i) for i in d]
cmds.select(paths, r=True)

Select only the middle vertices

vtxs = cmds.createSymmetryTable()

# Extract only middle vertices
d = [i for n, i in enumerate(vtxs) if n == vtxs[n]]

# Select object
sel = cmds.ls(sl=True, fl=True, long=True)[0]
paths = ["{}.vtx[{}]".format(sel, i) for i in d]
cmds.select(paths, r=True)