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Laser pointer in C++

Hello, I've been having a bit of trouble finding tutorials on developing a Laser Pointer with C++, if anyone could help me and point me in the right direction. I've found some tutorials and repos on GitHub, but using Python. I wanted to develop using C++ because I want to implement it with Unity3D.

Basically, I want the OpenCV to detect a red laser dot and return its center position. Thanks a lot!