/*

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

*

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

*

* 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

      )*0.49;

      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

      )*0.49;

    }

  }

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

    float adj = x;

    float opp = y;

    float dist;

    float mod;

    if(pt != null) {

      float XRev = map(pt.getX(), realWidth, realHeight, WIDTH, HEIGHT);

      float YRev = map(pt.getY(), realWidth, realHeight, WIDTH, HEIGHT);

      adj = x - XRev;

      opp = y - YRev;

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

      if(dist < PENSIZE) {

        if(dist < 4) dist = PENSIZE;

        mod = PENSIZE/dist;

        xvel += mvelX*mod;

        yvel += mvelY*mod;

      }

    }

    if(randomGust > 0) {

      adj = x - randomGustX;

      opp = y - randomGustY;

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

      if(dist < randomGustSize) {

        if(dist < RES*2) dist = randomGustSize;

        mod = randomGustSize/dist;

        xvel += (randomGustMax-randomGust)*randomGustXvel*mod;

        yvel += (randomGustMax-randomGust)*randomGustYvel*mod;

      }

    }

    xvel *= 0.99;

    yvel *= 0.98;

  }

  void addcolour(int amt) {

    col += amt;

    if(col > 196) col = 196;

  }

  void display(int i, int u) {

    float tcol = 0;

    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

      )*0.3;

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

    }

    fill(255-tcol, 255-tcol, 255-tcol);

    rect(x,y,RES,RES);

    col = 0;

  }

}