How do I calculate texture coordinates? Hello, I am beginner using Opengl. I have been studying C++ but the new class I am taking right now is using this 'opengl' libaray and i feel like I am learning a whole another language. 

What I have is a cylinder using GL_Triangles and I have succesfully created an array with all coordinates inside, but I have difficuly moving on to calculate the texture coordinates. 

I was told that I have to use 'bicentenary coordinates?' to calculate the texture coordinates, and now i am very confused. 
Any tips would be appreicated, thanks. 