[HELP]About pick cells.

[ZiguoAtGitHub]

Hi Marco,
When I pick cell in the plot window by binding the callback "mouse click" I met one problem:
Nothing could be picked when the alpha of mesh was not 1.
Is this the bug of VTK? and can be fixed?
Thanks!
The example code is below:

from vedo import *
import tkinter as tk
import tkinter.filedialog as fdlg
import tkinter.ttk as ttk
import tkinter.messagebox as msgbox

class MainGUI(tk.Frame):
  def __init__(self, master=None):
    tk.Frame.__init__(self, master)
    self.grid()
    scrwidth = self.winfo_screenwidth()
    scrheight = self.winfo_screenheight()

    self.Plot_But=ttk.Button(self,text='显示',command=self.plot)
    self.Plot_But.grid(row=0,column=0)
    #~~
    self.plt= Plotter(axes=4)
    self.plt.add_callback("mouse click", self.vedo_pick_cell)
  # ======================================================
  def vedo_pick_cell(self,evt):
    msh = evt.actor
    itemp=10
    if not msh:return
    pt = evt.picked3d
    idcell = msh.closest_point(pt, return_cell_id=True)
    msh.cellcolors[idcell] = [255,0,0,255] # red, opaque
  #----------------------------------------------------------
  def plot(self):
    self.plt.clear(deep=True, render=False)
    self.plt.actors.clear()
    line_cell=[((-5000,-5000,0),(-4000,-4000,5000)),((-5000,-5000,0),(-4000,4000,5000)),((-5000,-5000,0),(4000,-4000,5000)),
               ((-5000,5000,0),(-4000,4000,5000)),((-5000,5000,0),(-4000,-4000,5000)),((-5000,5000,0),(4000,4000,5000)),
               ((5000,-5000,0),(4000,-4000,5000)),((5000,-5000,0),(4000,4000,5000)),((5000,-5000,0),(-4000,-4000,5000)),
               ((5000,5000,0),(4000,4000,5000)),((5000,5000,0),(4000,-4000,5000)),((5000,5000,0),(-4000,4000,5000)),
               ((-4000,-4000,5000),(-3000,-3000,10000)),((-4000,-4000,5000),(-3000,3000,10000)),((-4000,-4000,5000),(3000,-3000,10000)),
               ((-4000,4000,5000),(-3000,3000,10000)),((-4000,4000,5000),(-3000,-3000,10000)),((-4000,4000,5000),(3000,3000,10000)),
               ((4000,-4000,5000),(3000,-3000,10000)),((4000,-4000,5000),(3000,3000,10000)),((4000,-4000,5000),(-3000,-3000,10000)),
               ((4000,4000,5000),(3000,3000,10000)),((4000,4000,5000),(3000,-3000,10000)),((4000,4000,5000),(-3000,3000,10000)),
               ((-3000,-3000,10000),(-2000,-2000,15000)),((-3000,-3000,10000),(-2000,2000,15000)),((-3000,-3000,10000),(2000,-2000,15000)),
               ((-3000,3000,10000),(-2000,2000,15000)),((-3000,3000,10000),(-2000,-2000,15000)),((-3000,3000,10000),(2000,2000,15000)),
               ((3000,-3000,10000),(2000,-2000,15000)),((3000,-3000,10000),(2000,2000,15000)),((3000,-3000,10000),(-2000,-2000,15000)),
               ((3000,3000,10000),(2000,2000,15000)),((3000,3000,10000),(2000,-2000,15000)),((3000,3000,10000),(-2000,2000,15000))
              ]
    line_cell2=[((-2000,-2000,15000),(-1000,-1000,20000)),((-2000,-2000,15000),(-1000,1000,20000)),((-2000,-2000,15000),(1000,-1000,20000)),
               ((-2000,2000,15000),(-1000,1000,20000)),((-2000,2000,15000),(-1000,-1000,20000)),((-2000,2000,15000),(1000,1000,20000)),
               ((2000,-2000,15000),(1000,-1000,20000)),((2000,-2000,15000),(1000,1000,20000)),((2000,-2000,15000),(-1000,-1000,20000)),
               ((2000,2000,15000),(1000,1000,20000)),((2000,2000,15000),(1000,-1000,20000)),((2000,2000,15000),(-1000,1000,20000)),
               ((-4000,-4000,5000),(4000,-4000,5000)),((-4000,4000,5000),(4000,4000,5000)),((-4000,-4000,5000),(-4000,4000,5000)),
               ((4000,-4000,5000),(4000,4000,5000)),((-3000,-3000,10000),(3000,-3000,10000)),((-3000,3000,10000),(3000,3000,10000)),
               ((-3000,-3000,10000),(-3000,3000,10000)),((3000,-3000,10000),(3000,3000,10000)),((-2000,-2000,15000),(2000,-2000,15000)),
               ((-2000,2000,15000),(2000,2000,15000)),((-2000,-2000,15000),(-2000,2000,15000)),((2000,-2000,15000),(2000,2000,15000)),
               ((-1000,-1000,20000),(1000,-1000,20000)),((-1000,1000,20000),(1000,1000,20000)),((-1000,-1000,20000),(-1000,1000,20000)),
               ((1000,-1000,20000),(1000,1000,20000)),((-4000,4000,5000),(4000,-4000,5000)),((-4000,-4000,5000),(4000,4000,5000)),
               ((-3000,3000,10000),(3000,-3000,10000)),((-3000,-3000,10000),(3000,3000,10000)),((-2000,2000,15000),(2000,-2000,15000)),
               ((-2000,-2000,15000),(2000,2000,15000)),((-1000,1000,20000),(1000,-1000,20000)),((-1000,-1000,20000),(1000,1000,20000))
               ]
    self.plt+=Lines(line_cell,c='blue',lw=2,alpha=0.8)
    #elf.plt+=Lines(line_cell2,c='gray',lw=2,alpha=1)
    self.plt.show(viewup="z", axes=4, interactive=False, title="XStructure")


myApp = MainGUI()
myApp.mainloop()

[marcomusy]

Hi this has been fixed in the master, try:

pip install -U git+https://github.com/marcomusy/vedo.git

also change

self.plt.clear(deep=True, render=False)
# to
self.plt.clear(deep=True)

[ZiguoAtGitHub]

ALL DONE!
Thank you, Marco! 👍👍