glutMotionFunc, glutPassiveMotionFunc — set the motion and passive motion callbacks respectively for the current window.
void glutMotionFunc
| ( | void (*func)(int x, int y)); |
void glutPassiveMotionFunc
| ( | void (*func)(int x, int y)); |
glutMotionFunc and glutPassiveMotionFunc set the motion and passive motion callback respectively for the current window. The motion callback for a window is called when the mouse moves within the window while one or more mouse buttons are pressed. The passive motion callback for a window is called when the mouse moves within the window while no mouse buttons are pressed.
The x and y callback parameters indicate the mouse location in window relative coordinates.
Passing NULL to glutMotionFunc or glutPassiveMotionFunc disables the generation of the mouse or passive motion callback respectively.