[PWC3] Random Walker

float i;

int a;

int count=0;

int moveDist = 5;

​

walker alpha = new walker(100,100);

walker beta = new walker(400,400);

walker gamma = new walker(100,400);

walker delta = new walker(400,100);

walker epsilon = new walker(250,250);

​

class walker{  

    int x;

    int y;    

    int nx;

    int ny;

    color col;

    walker(int ex, int why){

       x=ex;

       y=why;

       nx=ex;

       ny=why;

       col=color(255);

    }

    void setCoord(int ex, int why){

       x=ex;

       nx=ex;

       y=why;

       ny=why;

    }

    void update(){

        a=(int)random(4);      

        switch(a){

        case 0:

            nx+=moveDist;

            ny+=moveDist;

            break;

        case 1:

            nx+=moveDist;

            ny-=moveDist;      

            break;

        case 2:

            nx-=moveDist;

            ny+=moveDist;      

            break;

        case 3: 

            nx-=moveDist;

            ny-=moveDist;      

            break;

        }

        stroke(col);        

        line(x,y,nx,ny);        

        if(nx<=0)

            nx=0;

        if(nx>=width)

            nx=width;

        if(ny<=0)

            ny=1;

        if(ny>=height)

            ny=height-1;

        x=nx;

        y=ny;  

    }

}

​

void setup(){

  size(500,500);

  background(255);

  alpha.col=color(255,0,50,150);

  beta.col=color(50,0,255,150);

  gamma.col=color(0,255,50,150);

  delta.col=color(175,125,0,150);

  epsilon.col=color(50,100,100,150);

}

​

void draw(){

   fill(0);

   rect(0,0,50,50);

   fill(255);

   text("Reset",10,28);

   alpha.update();

   beta.update();

   gamma.update();

   delta.update();

   epsilon.update();

}

​

void mouseClicked(){

   if(mouseX<=50&&mouseY<=50){

      background(255);

      alpha = new walker(100,100);

      beta = new walker(400,400);

      gamma = new walker(100,400);

      delta = new walker(400,100);

      epsilon = new walker(250,250);

      alpha.col=color(255,0,50,150);

      beta.col=color(50,0,255,150);

      gamma.col=color(0,255,50,150);

      delta.col=color(175,125,0,150); 

      epsilon.col=color(50,100,100,150);

   }

}

​

void keyPressed(){

   if(keyCode==UP)

     moveDist++;

   if(keyCode==DOWN)

     moveDist--;

   if(moveDist<1)

     moveDist=1;

}