/*

* 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_FRONT

* file that was distributed with this source code.

*/

class particle

{

    float x;

    float y;

    float xvel;

    float yvel;

    int pos;

    particle(float xIn, float yIn)

    {

        x = xIn;

        y = yIn;

    }

    void updatepos()

    {

        float col1;

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

        {

            //stroke(#cccccc);

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

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

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

            vsquare o = v[vi][vu];

            //xvel += o.xvel*0.05;

            //yvel += o.yvel*0.05;

            float ax = (x%RES)/RES;

            float ay = (y%RES)/RES;

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

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

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

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

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

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

            o.col += 4;

            x += xvel;

            y += yvel;

        }

        else

        {

            x = random(0,WIDTH);

            y = random(0,HEIGHT);

            xvel = 0;

            yvel = 0;

        }

        xvel *= 0.5;

        yvel *= 0.5;

    }

}