Please reply soon !!
As i am still newbie to OpenGL, finding it little difficult in 3D movement & rotation !!

Here are the movement functions !!

Code :
void moveSphere(float fraction){
    float dirX,dirZ;
    dirX=atX-eyeX;
    dirZ=atZ-eyeZ;
    eyeX += dirX * fraction;
    eyeZ += dirZ * fraction;
    atX += dirX * fraction;
    atZ += dirZ * fraction;
    sphereX += dirX * fraction;
    sphereZ += dirZ * fraction;
}
 
void strafeSphere(float fraction){
    float orthoX,orthoZ;
    orthoX = -(atZ-eyeZ);
    orthoZ = atX-eyeX;
    eyeX += orthoX * fraction;
    eyeZ += orthoZ * fraction;
    atX += orthoX * fraction;
    atZ += orthoZ * fraction;
    sphereX += orthoX * fraction;
    sphereZ += orthoZ * fraction;
}
 
void rotateView(float fraction){
    float dirX,dirZ;
    dirX = eyeX - atX;
    dirZ = eyeZ - atZ;
    eyeZ = atZ + sin(fraction) * dirX + cos(fraction) * dirZ;
    eyeX = atX + cos(fraction) * dirX - sin(fraction) * dirZ;
    dirX = atX - eyeX;
    dirZ = atZ - eyeZ;
    sphereZ = eyeZ + sin(fraction) * dirX + cos(fraction) * dirZ;
    sphereX = eyeX + cos(fraction) * dirX - sin(fraction) * dirZ;
}
 
void pitchSphere(){
    int i=0,j=0;
    while(i<6){
        sphereY += 0.2;
        atY += 0.2;
        eyeY += 0.2;
        i++;
        if(keyBuffer[GLUT_KEY_UP])
            moveSphere(0.01);
        if(keyBuffer[GLUT_KEY_DOWN])
            moveSphere(-0.01);
        renderScene();
        causeDelay();
    }
    while(j<3){
        j++;
        if(keyBuffer[GLUT_KEY_UP])
            moveSphere(0.01);
        if(keyBuffer[GLUT_KEY_DOWN])
            moveSphere(-0.01);
        renderScene();
        causeDelay();
    }
    while(i>0){
        causeDelay();
        sphereY -= 0.2;
        atY -= 0.2;
        eyeY -= 0.2;
        i--;
        if(keyBuffer[GLUT_KEY_UP])
            moveSphere(0.1);
        if(keyBuffer[GLUT_KEY_DOWN])
            moveSphere(-0.1);
        renderScene();
    }
}

And here is my sphere rendering code !!

Code :
void renderSphere(){
    glPushAttrib(GL_ALL_ATTRIB_BITS);
    glPushMatrix();
    glTranslatef(sphereX,sphereY,sphereZ);
    glRotatef(theta[0],1.0,0.0,0.0);
    glRotatef(theta[1],0.0,1.0,0.0);
    glRotatef(theta[2],0.0,0.0,1.0);
    glColor3f(0.5,0.5,1.0);
    if(wired)
        glutWireSphere(radius,size<3?3:size,size<3?3:size);
    else
        glutSolidSphere(radius,size<3?3:size,size<3?3:size);
    glPopMatrix();
    glPopAttrib();
}

And finally display function !!

Code :
// Initial camera parameters
float eyeX=0.0,eyeY=0.5,eyeZ=4.0;                   // Camera eye
float atX=0.0,atY=0.5,atZ=0.0;                      // Center of projection : Look at
float sphereX=0.0,sphereY=-0.8,sphereZ=-1.0;
void renderGame(){
    processKeys();
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
    glLoadIdentity();
    gluLookAt(  eyeX,eyeY,eyeZ,
                atX,atY,atZ,
                0.0,1.0,0.0);
    renderSkybox();
    renderBase();
    renderSphere();
    renderTime();
}

Problem: When i rotate, sphere jerks !! which is not clean !!

Any Solution ?? And is there any efficient way to jump ??