1 /*

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

     3 *

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

     5 *

     6 * For the full copyright and license information, please view the LICENSE_FRONT

     7 * file that was distributed with this source code.

     8 */

     9 

    10 class vbuffer

    11 {

    12   int x;

    13   int y;

    14   float xvel;

    15   float yvel;

    16   float pressurex = 0;

    17   float pressurey = 0;

    18   float pressure = 0;

    19   

    20   vbuffer(int xIn,int yIn) {

    21     x = xIn;

    22     y = yIn;

    23     pressurex = 0;

    24     pressurey = 0;

    25   }

    26   

    27   void updatebuf(int i, int u) {

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

    29       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);

    30       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);

    31       pressure = (pressurex + pressurey)*0.25;

    32     }

    33   }

    34 }