I want to let a unit follow the mouse like in any RTS (Warcraft 3, Starcraft, ...). For that I have a "ground plane" which is defined through 2 vectors, the X and Z axis. Now I need to get the world coordinate of the mouse click on this plane in order to move the unit. I'm using OGRE & C++.
How can I get the coordinates of the mouse click on the ground plane?