OpenGL C Quick Reference

void gluLookAt( GLdouble eyeX, GLdouble eyeY, GLdouble eyeZ, 
GLdouble centerX, GLdouble centerY, GLdouble centerZ, 
GLdouble upX, GLdouble upY, GLdouble upZ )

Creates a viewing matrix derived from an eye point, a reference point indicating the center of the scene, and an up vector. The matrix maps the reference point to the negative z axis and the eye point to the origin, so that, when a typical projection matrix is used, the center of the scene maps to the center of the viewport. Similarly, the direction described by the up vector projected onto the viewing plane is mapped to the positive y axis so that it points upward in the viewport.

void glutMouseFunc( void (*mouse)(int button, int state, 
int x, int y) )

Sets up a callback function to handle mouse button events.

void glutMotionFunc( void (*motion)(int x, int y) )

Sets up a callback function to handle mouse motion events.