Obtain vertex index from webgl

[MICA-MNI]

Hello pycortex team!

Quite amazed by your beautiful software, we are currently trying to build a pycortex webgl viewer that shows different types of connectivity data and interactively updates the maps shown based on the vertices that are clicked. Would there be an easy way to implement this? I saw one can define a pickerfun but was not sure how to utilize this. The script we're using is shown below.

Cheers & many thanks,
Boris

import cortex
import cortex.polyutils
import numpy as np
import scipy.io as si


# downsampled fsaverage data 
subject = "S1_ds"

# load the matrices 
deep        = si.loadmat('/Users/boris/Desktop/pycortex-master/filestore/db/S1_ds/surface-info/dd_fs4s.mat')
deep        = deep['a']
mpc         = si.loadmat('/Users/boris/Desktop/pycortex-master/filestore/db/S1_ds/surface-info/mc_fs4s.mat')
mpc         = mpc['a']
gd          = si.loadmat('/Users/boris/Desktop/pycortex-master/filestore/db/S1_ds/surface-info/gd_fs4s.mat')
gd          = gd['a']
sc          = si.loadmat('/Users/boris/Desktop/pycortex-master/filestore/db/S1_ds/surface-info/sc_fs4s.mat')
sc          = sc['a']


# ideally we would like to get recalculate these maps every time the user clicks 
# on a given vertex i.e. reassign the 'vert' variable below interactively
vert        = 800
deep_map    = cortex.Vertex(deep[vert,], subject, cmap="plasma")
mpc_map     = cortex.Vertex(mpc[vert,], subject, cmap="Greys_r")
gd_map      = cortex.Vertex(gd[vert,], subject, cmap="hot")
sc_map      = cortex.Vertex(sc[vert,], subject, cmap="PuBu_r")


maps        =  {'GEODESIC': gd_map, 'MPC': mpc_map, 'SC': sc_map, 'DEEP': deep_map}

cortex.webgl.show(data=maps, recache=True, title='Wiring', 
                  overlays_visible=(''),
                  labels_visible=('')) 

[marcoaqil]

up: on a more general note, I also cannot make pickerfun work even for an extremely simple application, like printing the vertex index. If anyone knows how to make it work, by all means let know