C# 判断圆与矩形的冲突
作者：互联网
业务需要，我们把圆描述为孔，矩形描述为槽，在一个平面内判断是否冲突，所谓冲突即是孔与槽相交或孔在槽内。想了个简单的近似不严格判断方法，代码如下：
/// <summary>
/// 判断孔槽冲突
/// </summary>
/// <param name="kcList_kong">孔列表</param>
/// <param name="kcList_cao">槽列表</param>
/// <returns></returns>
private static string CheckXMLKongCao_KongCao(List<Tools.KongCao> kcList_kong, List<Tools.KongCao> kcList_cao)
{
string sErrMsg = "";
//定义槽的四个点，从原点开始，顺时针方向P1-P4
Tools.Point p1_cao = new Tools.Point();
Tools.Point p2_cao = new Tools.Point();
Tools.Point p3_cao = new Tools.Point();
Tools.Point p4_cao = new Tools.Point();
//定义孔的四个点，从圆心左边开始，顺时针方向，分别为P1-P4
Tools.Point p1_kong = new Tools.Point();
Tools.Point p2_kong = new Tools.Point();
Tools.Point p3_kong = new Tools.Point();
Tools.Point p4_kong = new Tools.Point();
foreach (Tools.KongCao kc_kong in kcList_kong)
{
//取孔的四个点
GetPointFromKong(kc_kong, ref p1_kong, ref p2_kong, ref p3_kong, ref p4_kong);
foreach (Tools.KongCao kc_cao in kcList_cao)
{
// 取槽的四个点
GetPointFromCao(kc_cao, ref p1_cao, ref p2_cao, ref p3_cao, ref p4_cao);
//检查孔外围点P1，是否与槽冲突
if (CheckPointInRect(p1_kong, p1_cao, p3_cao))
{
sErrMsg = kc_kong.Name + " 与 " + kc_cao.Name + "位置冲突，请检查!";
break;
}
//检查孔外围点P2，是否与槽冲突
if (CheckPointInRect(p2_kong, p1_cao, p3_cao))
{
sErrMsg = kc_kong.Name + " 与 " + kc_cao.Name + "位置冲突，请检查!";
break;
}
//检查孔外围点P3，是否与槽冲突
if (CheckPointInRect(p3_kong, p1_cao, p3_cao))
{
sErrMsg = kc_kong.Name + " 与 " + kc_cao.Name + "位置冲突，请检查!";
break;
}
//检查孔外围点P4，是否与槽冲突
if (CheckPointInRect(p4_kong, p1_cao, p3_cao))
{
sErrMsg = kc_kong.Name + " 与 " + kc_cao.Name + "位置冲突，请检查!";
break;
}
}
if (!string.IsNullOrEmpty(sErrMsg)) //出错返回
{
break;
}
}
return sErrMsg;
}// end of CheckXMLKongCao_KongCao
/// <summary>
/// 检查孔外围点1，是否与槽冲突
/// </summary>
/// <param name="p1_kong"></param>
/// <param name="p1_cao"></param>
/// <param name="p3_cao"></param>
private static bool CheckPointInRect(Tools.Point p1_kong, Tools.Point p1_cao, Tools.Point p3_cao)
{
if (((Convert.ToDouble(p1_kong.X) >= Convert.ToDouble(p1_cao.X)) &&
(Convert.ToDouble(p1_kong.X) <= Convert.ToDouble(p3_cao.X))) &&
((Convert.ToDouble(p1_kong.Y) >= Convert.ToDouble(p1_cao.Y)) &&
(Convert.ToDouble(p1_kong.Y) <= Convert.ToDouble(p3_cao.Y))))
{
return true;
}
else
{
return false;
}
}// end of CheckPointInRect
/// <summary>
/// 取孔的四个外围点
/// </summary>
/// <param name="kc_kong"></param>
/// <param name="p1_kong"></param>
/// <param name="p2_kong"></param>
/// <param name="p3_kong"></param>
/// <param name="p4_kong"></param>
private static void GetPointFromKong(Tools.KongCao kc_kong, ref Tools.Point p1, ref Tools.Point p2,
ref Tools.Point p3, ref Tools.Point p4)
{
p1.X = Convert.ToString(Convert.ToDouble(kc_kong.Center.X) - kc_kong.Radius / 2);
p1.Y = kc_kong.Center.Y;
p2.X = kc_kong.Center.X;
p2.Y = Convert.ToString(Convert.ToDouble(kc_kong.Center.Y) - kc_kong.Radius / 2);
p3.X = Convert.ToString(Convert.ToDouble(kc_kong.Center.X) + kc_kong.Radius / 2);
p3.Y = p1.Y;
p4.X = p2.X;
p4.Y = Convert.ToString(Convert.ToDouble(kc_kong.Center.Y) + kc_kong.Radius / 2);
}// end of GetPointFromKong
/// <summary>
/// 取槽的四个点
/// </summary>
/// <param name="kc_cao"></param>
/// <param name="p1"></param>
/// <param name="p2"></param>
/// <param name="p3"></param>
/// <param name="p4"></param>
private static void GetPointFromCao(Tools.KongCao kc_cao, ref Tools.Point p1, ref Tools.Point p2, ref Tools.Point p3,
ref Tools.Point p4)
{
if (kc_cao.Angel == "0" || kc_cao.Angel == "180")
{
p1.X = Convert.ToString(Convert.ToDouble(kc_cao.Center.X) - kc_cao.Length / 2);
p1.Y = Convert.ToString(Convert.ToDouble(kc_cao.Center.Y) - kc_cao.Width / 2);
p2.X = p1.X;
p2.Y = Convert.ToString(Convert.ToDouble(kc_cao.Center.Y) + kc_cao.Width / 2);
p3.X = Convert.ToString(Convert.ToDouble(kc_cao.Center.X) + kc_cao.Length / 2);
p3.Y = p2.Y;
p4.X = p3.X;
p4.Y = p1.Y;
}
else
{
p1.X = Convert.ToString(Convert.ToDouble(kc_cao.Center.X) - kc_cao.Width / 2);
p1.Y = Convert.ToString(Convert.ToDouble(kc_cao.Center.Y) - kc_cao.Length / 2);
p2.X = p1.X;
p2.Y = Convert.ToString(Convert.ToDouble(kc_cao.Center.Y) + kc_cao.Length / 2);
p3.X = Convert.ToString(Convert.ToDouble(kc_cao.Center.X) + kc_cao.Width / 2);
p3.Y = p2.Y;
p4.X = p3.X;
p4.Y = p1.Y;
}
}// end of GetPointFromCao
标签：kc,Convert,p1,C#,kong,cao,冲突,矩形,Tools 来源： https://blog.csdn.net/wren2004/article/details/100692105