How do I get the vertices of an actor object in the Editor state

Greeting,
I want to make an editor tool,However, I don’t know how to get the vertex position of scene actor, for example, a vertex position of a cube. Now I want to click the emission ray with the mouse and get the position of that vertex, but I am new to it, and I don’t know what blueprint node to use to get the position of the emission ray with the mouse, or there are other methods.
屏幕截图 2022-04-16 002334
Thank you very much