mouse movement opengl

Question

I am creating a pool game written in C++ using plain OpenGL (no external tools), but I can use GLUT. I have drawn a pool cue which I want to follow the mouse cursor but I am not sure how to do this.

I know how to use keyboard input to move things e.g camera position or draw an object but I m not sure how to move an object using mouse input.

This is the cue i am trying to move via mouse input:

void cue () {
  glBegin;
  glTranslatef(-10,5,0); 
  glRotatef(90,0,1,0); 
  glutSolidCone(0.25, 15, 20, 20);
  glEnd();
}

Answer 1

Glut has a few mouse callback function
Mouse callback
Motion callback

You could use the callback to figure out the movement of the mouse, the rest is pure math.

Answer 2

NeHe has a tutorial that covers the basics of rotation in OpenGL: http://nehe.gamedev.net/data/lessons/lesson.asp?lesson=04

If you want to rotate around another point see How to change the Center-of-Rotation in OpenGL . It basically comes down to this:

Translate it so that the point you want to rotate around is at the origin, then rotate, then translate it to the location you want it at.

Also use glPushMatrix/glPopMatrix or glLoadIdentity to isolate transformations.