7.6 glutMotionFunc, glutPassiveMotionFunc

  glutMotionFunc and glutPassiveMotionFunc set the motion and passive motion callbacks respectively for the current window.

Usage

void glutMotionFunc(void (*func)(int x, int y));
void glutPassiveMotionFunc(void (*func)(int x, int y));

func

The new motion or passive motion callback function.

Description

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.