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 particle

    11 {

    12     float x;

    13     float y;

    14     float xvel;

    15     float yvel;

    16     int pos;

    17     

    18     particle(float xIn, float yIn)

    19     {

    20         x = xIn;

    21         y = yIn;

    22     }

    23 

    24     void updatepos()

    25     {

    26         float col1;

    27         if(x > 0 && x < WIDTH && y > 0 && y < HEIGHT)

    28         {

    29             //stroke(#cccccc);

    30             //line(x,y,x+xvel,y+yvel);

    31             int vi = (int)(x/RES);

    32             int vu = (int)(y/RES);

    33             vsquare o = v[vi][vu];

    34             //xvel += o.xvel*0.05;

    35             //yvel += o.yvel*0.05;

    36 

    37             float ax = (x%RES)/RES;

    38             float ay = (y%RES)/RES;

    39 

    40             xvel += (1-ax)*v[vi][vu].xvel*0.05;

    41             yvel += (1-ay)*v[vi][vu].yvel*0.05;

    42 

    43             xvel += ax*v[vi+1][vu].xvel*0.05;

    44             yvel += ax*v[vi+1][vu].yvel*0.05;

    45 

    46             xvel += ay*v[vi][vu+1].xvel*0.05;

    47             yvel += ay*v[vi][vu+1].yvel*0.05;

    48 

    49             o.col += 4;

    50 

    51             x += xvel;

    52             y += yvel;

    53         }

    54         else

    55         {

    56             x = random(0,WIDTH);

    57             y = random(0,HEIGHT);

    58             xvel = 0;

    59             yvel = 0;

    60         }

    61 

    62         xvel *= 0.5;

    63         yvel *= 0.5;

    64     }

    65 }