/*

* 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 vsquare

{

    int x;

    int y;

    float xvel;

    float yvel;

    float col;

    vsquare(int xIn,int yIn)

    {

        x = xIn;

        y = yIn;

    }

    void addbuffer(int i, int u)

    {

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

        {

            xvel += (vbuf[i-1][u-1].pressure*0.5

            +vbuf[i-1][u].pressure

            +vbuf[i-1][u+1].pressure*0.5

            -vbuf[i+1][u-1].pressure*0.5

            -vbuf[i+1][u].pressure

            -vbuf[i+1][u+1].pressure*0.5

            )*0.25;

            yvel += (vbuf[i-1][u-1].pressure*0.5

            +vbuf[i][u-1].pressure

            +vbuf[i+1][u-1].pressure*0.5

            -vbuf[i-1][u+1].pressure*0.5

            -vbuf[i][u+1].pressure

            -vbuf[i+1][u+1].pressure*0.5

            )*0.25;

        }

    }

    void updatevels(int mvelX, int mvelY, TuioPoint pt)

    {

        if(pt != null)

        {

            float adj = x - pt.getX();

            float opp = y - pt.getY();

            float dist = sqrt(opp*opp + adj*adj);

            if(dist < PENSIZE)

            {

                if(dist < 4) dist = PENSIZE;

                float mod = PENSIZE/dist;

                xvel += mvelX*mod;

                yvel += mvelY*mod;

            }

        }

        xvel *= 0.99;

        yvel *= 0.99;

    }

    void display(int i, int u)

    {

        float tcol = 0;

        if(col > 255) col = 255;

        if(i>0 && i<lwidth-1 && u>0 && u<lheight-1)

        {

            tcol = (+ v[i][u+1].col + v[i+1][u].col + v[i+1][u+1].col*0.5)*0.4;

            tcol = (int)(tcol+col*0.5);

        }

        else

        {

            tcol = (int)col;

        }

        fill(tcol, tcol, tcol);

        rect(x,y,RES,RES);

        //col = 32;

    }

}