Unity中计算点到线的距离

来源：互联网发布：ubuntu上安装vpf 编辑：程序博客网时间：2024/05/29 15:11

private double pointToLine(Vector2 point1, Vector2 point2, Vector2 position)//point1和point2为线的两个端点    {        double space = 0;        double a, b, c;        a = Vector2.Distance(point1,point2);// 线段的长度              b = Vector2.Distance(point1, position);// position到点point1的距离              c = Vector2.Distance(point2, position);// position到point2点的距离         if (c <= 0.000001 || b <= 0.000001)        {            space = 0;            return space;        }        if (a <= 0.000001)        {            space = b;            return space;        }        if (c * c >= a * a + b * b)        {            space = b;            return space;        }        if (b * b >= a * a + c * c)        {            space = c;            return space;        }        double p = (a + b + c) / 2;// 半周长              double s = Math.Sqrt(p * (p - a) * (p - b) * (p - c));// 海伦公式求面积              space = 2 * s / a;// 返回点到线的距离（利用三角形面积公式求高）              return space;    }

阅读全文

0 0