/// <summary>
/// 判断一个地块是否可见
/// </summary>
/// <param name="shadowLine"></param>
/// <param name="projection"></param>
/// <returns></returns>
bool IsVisible(ShadowLine shadowLine, Shadow projection)
{
return(!shadowLine.AllInShadow(projection)); // 如果这个地块的投影完全在阴影线的阴影里，则认为这个地块是不可见的
}
/// <summary>
/// 判断一个地块是否遮挡视线
/// </summary>
/// <param name="shadowLine"></param>
/// <param name="currentPosition"></param>
/// <param name="projection"></param>
/// <returns></returns>
bool IsBlockView(ShadowLine shadowLine, Vector2 currentPosition, Shadow projection)
{
return(!shadowLine.AllInShadow(projection) && !_visiableMap.IsTransparent(currentPosition));
// 如果这个地块没有完全处于阴影中，并且这个地块不透明，说明会遮挡视线
}