//copy constructor
public Segment(Segment cpy)
{
startX = cpy.StartX;
endX = cpy.EndX;
startY = cpy.StartY;
endY = cpy.EndY;
m = cpy.getM();
b = cpy.getB();
lX = cpy.getLX();
hY = cpy.getHY();
lY = cpy.getLY();
hX = cpy.getHX();
vert = cpy.isVert();
}
//checks if segments intersect on given interval
//xaxis indicates direction of movement respective to x axis
public bool intersect(Segment inter, bool xaxis)
{
float interX;
//returns false if lines are parallel
if ((inter.getM() == m && inter.getB() == b) || (Single.IsPositiveInfinity(inter.getM()) && Single.IsPositiveInfinity(m)))
{
if((m == 0 && xaxis) && (lY == inter.getLY() && (startX < inter.getHX() && startX > inter.getLX())))
{
return true;
}
else if((vert && !xaxis) && (lX == inter.getLX() && (startY < inter.getHY() && startY > inter.getLY())))
{
return true;
}
return false;
}
//if one of the segments is verticle, chacks if second segment intersects it
if (vert)
{
//makes sure the segments intersect on the x and y axis
if ((startX < inter.getHX() && startX > inter.getLX()) && (hY > inter.getLY() && lY < inter.getHY()))
{
return true;
}
}
else if (inter.isVert())
{
//makes sure the segments intersect on the x and y axis
if ((inter.startX < hX && inter.startX > lX) && (inter.getHY() > lY && inter.getLY() < hY))
{
return true;
}
}
//else determines point of intersection based on m and b values and checks if intersection on interval bounded by the segments
else
{
interX = (b - inter.b) / (inter.m - m);
if (interX > lX && interX < hX)
{
return true;
}
}
return false;
}