using System;
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using System.Collections.Generic;
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using System.Drawing;
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namespace IStation.WinFrmUI.Curve
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{
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/// <summary>
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/// 几何辅助类
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/// </summary>
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public class GeomHelper
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{
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//判断是否是0点,用于判断函数是否成功返回
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public static bool IsZeroPoint(Model.CurvePoint pt)
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{
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if (pt.X < 0.01 && pt.Y < 0.01)
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return true;
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else
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return false;
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}
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//判断 是否在2个数之间
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public static bool IsMiddlePt(double pt1, double pt2, double p)
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{
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if (p > pt1 && p < pt2)
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return true;
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if (p < pt1 && p > pt2)
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return true;
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return false;
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}
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//求2点的距离
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public static double Distance(Model.CurvePoint pt1, Model.CurvePoint pt2)
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{
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return Math.Sqrt((pt1.X - pt2.X) * (pt1.X - pt2.X) + (pt1.Y - pt2.Y) * (pt1.Y - pt2.Y));
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}
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//点到线的距离
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public static double Distance(Model.CurvePoint pt1, List<Model.CurvePoint> CurvePoints)
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{
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if (CurvePoints == null)
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return 10000;
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double min_dis = 10000;
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double dis = 0;
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foreach (Model.CurvePoint pt in CurvePoints)
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{
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dis = Distance(pt1, pt);
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if (dis < min_dis)
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min_dis = dis;
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}
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return min_dis;
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}
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//根据2点 产生矩形
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public static Rectangle CreateRectangle(Point corner1, Point corner2)
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{
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int x = corner1.X < corner2.X ? corner1.X : corner2.X;
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int y = corner1.Y < corner2.Y ? corner1.Y : corner2.Y;
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int width = Math.Abs(corner1.X - corner2.X);
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int height = Math.Abs(corner1.Y - corner2.Y);
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return new Rectangle(x, y, width, height);
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}
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public static RectangleF CreateRectangle(PointF corner1, PointF corner2)
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{
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float x = corner1.X < corner2.X ? corner1.X : corner2.X;
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float y = corner1.Y < corner2.Y ? corner1.Y : corner2.Y;
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float width = Math.Abs(corner1.X - corner2.X);
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float height = Math.Abs(corner1.Y - corner2.Y);
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return new RectangleF(x, y, width, height);
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}
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public bool IsOverlap(RectangleF r1, RectangleF r2)
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{
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if (!(r1.Right < r2.Left) && !(r1.Bottom < r2.Top))
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{
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if (!(r2.Right < r1.Left))
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{
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return !(r2.Bottom < r1.Top);
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}
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return false;
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}
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return false;
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}
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}
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}
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