/*

* This file is part of the TraKERS\Front Processing package.

*

* (c) IRI <http://www.iri.centrepompidou.fr/>

*

* For the full copyright and license information, please view the LICENSE

* file that was distributed with this source code.

*/

class vbuffer

{

    int x;

    int y;

    float xvel;

    float yvel;

    float pressurex = 0;

    float pressurey = 0;

    float pressure = 0;

    vbuffer(int xIn,int yIn)

    {

        x = xIn;

        y = yIn;

        pressurex = 0;

        pressurey = 0;

    }

    void updatebuf(int i, int u)

    {

        if(i>0 && i<lwidth && u>0 && u<lheight)

        {

            pressurex = (v[i-1][u-1].xvel*0.5 + v[i-1][u].xvel + v[i-1][u+1].xvel*0.5 - v[i+1][u-1].xvel*0.5 - v[i+1][u].xvel - v[i+1][u+1].xvel*0.5);

            pressurey = (v[i-1][u-1].yvel*0.5 + v[i][u-1].yvel + v[i+1][u-1].yvel*0.5 - v[i-1][u+1].yvel*0.5 - v[i][u+1].yvel - v[i+1][u+1].yvel*0.5);

            pressure = (pressurex + pressurey)*0.25;

        }

    }

}