Collidoscope

        ci::vec2	mCloudCenter; // initial positin of the particle 

        ci::vec2	mVel;         // velocity 

        float       mCloudSize;   // how big is the area where particle float around. When a particle hits the 

                                  //   border of the area it gets deflected 

        int			mAge;      // when mAge == mLifeSpan the particle is disposed 

        int			mLifespan; // how long a particle lives

        bool        mFlyOver;  // some particles last longer and fly over the screen and reach the other user

    ci::gl::VboRef			mParticleVbo;    // virtual buffer object