public class Header {

// number of lines

private static final int obstrucles=2;

public float getobstrucles() {

return obstrucles;

}

private class Line{

private float a,b,c,m,mp;

private float x_start,y_start;

private float x_end,y_end;

public void Line(float x_start,float y_start,float x_end,float y_end){

this.x_start=x_start;

this.y_start=y_start;

this.x_end=x_end;

this.y_end=y_end;

a=x_end-x_start;

b=y_start-y_end;

c=(y_start*x_end)-(x_start*y_end);

m=(y_end-y_start)/(x_end-x_start);

mp=(-1)/(m);

}

public float getA() {

return a;

}

public float getB() {

return b;

}

public float getC() {

return c;

}

public float getM() {

return m;

}

public float getMp() {

return mp;

}

public float getX_start() {

return x_start;

}

public float getY_start() {

return y_start;

}

public float getX_end() {

return x_end;

}

public float getY_end() {

return y_end;

}

}

/**

* Ball class

*/

public class Ball{

//initial coordinates

public float x,y;

//coordinates at time t

public float xt,yt;

//initial velocity

public float ux,uy;

//final velocity

public float vx,vy;

//speed of ball

public double modV;

public double getModV() {

return modV;

}

public void setModV() {

//this.vx=vx;

//this.vy=vy;

double temp=(vx*vx)+(vy*vy);

modV=Math.sqrt(temp);

}

//collusion detection

public int coll_flag;

public boolean coll_dect;

}

}