Building an interactive building route

Hello friends. I have a map of a building with floors that I made in blender. Using treejs I achieved some interactivity. I want to make it possible to build a route from one point in the room to another. What’s the best way to do this? I’m interested in the client side. Draw invisible elements of route nodes on a 3D map or what? Please tell me. Thank

This and this may help you out quite a bit.

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