How to make a 3D screen selection for Markup ControlPoints?

sunshine · February 1, 2023, 2:36am

Hello everyone,

I am working on my Python Scripted extension, trying to implement a rectangle (drawn by mouse) selection on the screen (3D Widget / Window) to select all the ControlPoints covered by the rectangle.

Could anyone share some ideas on what functions I should call, or what existing modules I can use to achieve this?

Thank you so much in advance!

muratmaga · February 1, 2023, 4:24am

We have a tool, MarkupEditor, that does something similar (by drawing closed curve Markup) as part of the SlicerMorph extension. I linked the tutorial.

The selection process (add/remove) can be improved. If you don’t want to rebuild from scratch, feel free to contribute to it…

github.com

SlicerMorph/SlicerMorph/blob/master/MarkupEditor/MarkupEditor.py

import logging
import math
import numpy
import os
import unittest

import vtk, qt, ctk, slicer
from slicer.ScriptedLoadableModule import *
from slicer.util import VTKObservationMixin

from SubjectHierarchyPlugins import AbstractScriptedSubjectHierarchyPlugin

#
# MarkupEditor
#

class MarkupEditor(ScriptedLoadableModule):
  """Uses ScriptedLoadableModule base class, available at:
  https://github.com/Slicer/Slicer/blob/master/Base/Python/slicer/ScriptedLoadableModule.py
  """

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smrolfe · February 1, 2023, 11:51am

The MarkupEditor was just updated today with a bug fix, so I recommend downloading from the Github repository directly or installing from the extension manager after the next build (likely tomorrow).

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How to make a 3D screen selection for Markup ControlPoints?

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