glutWarpPointer for FP camera issue - c++

Question

I am working on a project for mouse control to look around. I have been successful with rotating the camera using the mouse however I am trying to get the mouse to do 360 turns without the mouse leaving the screen before it can fully rotate. I read around and came across glutWarpPointer(), where most posts said to use it after getting the difference between the centre and the new mouse position in the window.
The issue this causes with my program is that when I move the mouse it will rotate very slightly for that frame the restart the location to the original point. Basically it i have a blue ball in front of me and green behind when i try to rotate towards the green ball the camera will move slightly but stay locked on the blue ball.
Is there a way to around or a fix?
void display()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
//rotate and translating the camera
glRotatef(-camVert, 1.0, 0.0, 0.0);
glRotatef(-camHor, 0.0, 1.0, 0.0);
glTranslatef(-posx,-posy,-posz);
//blue and green ball
glPushMatrix();
glColor3f(0.0, 1.0, 0.0);
glTranslatef(1, 0, 25);
glutSolidSphere(5, 20, 20);
glPopMatrix();
glPushMatrix();
glColor3f(0.0,0.0,1.0);
glTranslatef(0, 0, -25);
glutSolidSphere(5, 20, 20);
glPopMatrix();
};
void setAngle(float angy, float angx)
{
camVert = angy*1.5;
if (camVert > 90)
camVert = 90;
else if (camVert < -90)
camVert = -90;
camHor = angx*0.5;
}
void MoveCam(float distance, float direction)
{
float rads = (camHor+direction)*PI / 180;
posx -= sin(rads)*distance;
posz -= cos(rads)*distance;
};
void mouseMove(int x, int y)
{
float diffx = midx - x;
float diffy = midy - y;
setAngle(diffy,diffx);
//glutWarpPointer(glutGet(GLUT_WINDOW_WIDTH) / 2, glutGet(GLUT_WINDOW_HEIGHT) / 2);
}