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pythonpython-3.xopencascade

How to get the vertex that I clicked on OCC widget?

I use OCC with python to visualize .igs and .stl format. In .stl file I have a mesh on my model and I want to know what vertex on this mesh was clicked. At least to get some kind of id. I see that the model that I choose automatically highlights without any settings, so I guess there is a way to do this. But I couldn’t find any information about it. Model with mesh

Solution

  • Okay, found it. In case someone else will need it: 

     display = self.occWidget._display
 display.SetSelectionModeVertex() # This is the required function
 display.register_select_callback(recognize_clicked)

    where recognize_clicked is 

    def recognize_clicked(shp, *kwargs):
""" This is the function called every time
a face is clicked in the 3d view
"""
for shape in shp:
    print("Face selected: ", shape)

    Face selection - SetSelectionModeFace()

    Vertex selection - SetSelectionModeVertex()

    Edge selection - SetSelectionModeEdge()

    Shape selection - SetSelectionModeShape()

    Neutral (default) selection - SetSelectionModeNeutral()

    That is all the modes that I've found in other examples. Please, if you find more, write in a comment that resource.