Create customized mesh & modify it in runtime

Could you help me with some of my queries?? As I’m a beginner level Unity Developer, I want to create something like this…

Queries:

  1. What’s the concept called?? The concept of scanning of marker line & creating a mesh in runtime… If you help me with the name i can search on Google & try to create something like this…
  2. How to change the roaster mesh up & down in runtime?? Just give me a proper name or something related to it… will search it on google
  3. Which AR platform should I use?? In Unity I have used Vuforia & ARCore… which platform it is made?

Please it’s a kind request help me out… I will do RnD and try to create this type of experience…