public static RectBox GetIntersection(RectBox a, RectBox b)
{
float a_x = a.GetX();
float a_r = a.GetRight();
float a_y = a.GetY();
float a_t = a.GetBottom();
float b_x = b.GetX();
float b_r = b.GetRight();
float b_y = b.GetY();
float b_t = b.GetBottom();
float i_x = MathUtils.Max(a_x, b_x);
float i_r = MathUtils.Min(a_r, b_r);
float i_y = MathUtils.Max(a_y, b_y);
float i_t = MathUtils.Min(a_t, b_t);
return(i_x < i_r && i_y < i_t ? new RectBox(i_x, i_y, i_r - i_x, i_t - i_y) : null);
}
public static RectBox GetIntersection(RectBox a, RectBox b, RectBox result)
{
float a_x = a.GetX();
float a_r = a.GetRight();
float a_y = a.GetY();
float a_t = a.GetBottom();
float b_x = b.GetX();
float b_r = b.GetRight();
float b_y = b.GetY();
float b_t = b.GetBottom();
float i_x = MathUtils.Max(a_x, b_x);
float i_r = MathUtils.Min(a_r, b_r);
float i_y = MathUtils.Max(a_y, b_y);
float i_t = MathUtils.Min(a_t, b_t);
if (i_x < i_r && i_y < i_t)
{
result.SetBounds(i_x, i_y, i_r - i_x, i_t - i_y);
return(result);
}
return(null);
}
public bool Intersects(RectBox rect)
{
if (rect == null)
{
return(false);
}
float x1 = start.GetX();
float y1 = start.GetY();
float x2 = end.GetX() + start.GetX();
float y2 = end.GetY() + start.GetY();
float bx1 = rect.x;
float by1 = rect.y;
float bx2 = rect.GetRight();
float by2 = rect.GetBottom();
float t = 0;
if ((x1 >= bx1 && x1 <= bx2 && y1 >= by1 && y1 <= by2) || (x2 >= bx1 && x2 <= bx2 && y2 >= by1 && y2 <= by2))
{
return(true);
}
if (x1 < bx1 && x2 >= bx1)
{
t = y1 + (y2 - y1) * (bx1 - x1) / (x2 - x1);
if (t > by1 && t <= by2)
{
return(rect.Intersects(this));
}
}
else if (x1 > bx2 && x2 <= bx2)
{
t = y1 + (y2 - y1) * (bx2 - x1) / (x2 - x1);
if (t >= by1 && t <= by2)
{
return(rect.Intersects(this));
}
}
if (y1 < by1 && y2 >= by1)
{
t = x1 + (x2 - x1) * (by1 - y1) / (y2 - y1);
if (t >= bx1 && t <= bx2)
{
return(rect.Intersects(this));
}
}
else if (y1 > by2 && y2 <= by2)
{
t = x1 + (x2 - x1) * (by2 - y1) / (y2 - y1);
if (t >= bx1 && t <= bx2)
{
return(rect.Intersects(this));
}
}
return(false);
}
