whether the player can react based on user input while following in the waypoint system?

hai to all........i have one small doubt....w$$anonymous$$le using waypoint system whether we can access the player? what my need is my player want to run in a particular path always with based on my user inputs.???? my player runs in via the particular points now i want to give inputs i,e player always use the path system as well as react my input.....give some examples codings or project....Thank in advance