/// <summary>
/// 2つの四角形領域に交わっている箇所があるかどうか判定する。
/// </summary>
/// <param name="a">比較する四角領域a。</param>
/// <param name="b">比較する四角領域b。</param>
/// <returns>交わっている箇所があるならばtrue、そうでなければfalse。</returns>
public static bool IsIntersected(IRectBounds a, IRectBounds b)
{
var uy = b.GetNorthEastY();
var ux = b.GetNorthEastX();
var dy = b.GetSouthWestY();
var dx = b.GetSouthWestX();
var northY = a.GetNorthEastY();
var southY = a.GetSouthWestY();
var westX = a.GetSouthWestX();
var eastX = a.GetNorthEastX();
if (ux >= westX && ux <= eastX && uy >= northY && uy <= southY ||
dx >= westX && dx <= eastX && uy >= northY && uy <= southY ||
ux >= westX && ux <= eastX && dy >= northY && dy <= southY ||
dx >= westX && dx <= eastX && dy >= northY && dy <= southY)
{
return(true);
}
else
{
return(false);
}
}
