//===================================================================
// 点到直线距离（垂直距离）
// dist_Point_to_Line(): get the distance of a point to a line
// Input: a Point P and a Line L (in any dimension)
// Return: the shortest distance from P to L
public static double dist_Point_to_Line(Point3D P, RgLine L)
{
Vector3d v = L.P1 - L.P0;
Vector3d w = P - L.P0;
double c1 = RgMath.dot(w, v);
double c2 = RgMath.dot(v, v);
double b = c1 / c2;
RgPoint Pb = L.P0 + b * v;
return(RgMath.d(P, Pb));
}
/// <summary>
/// 点在直线上
/// </summary>
/// <param name="rPt"></param>
/// <param name="rLine"></param>
/// <returns></returns>
public static bool IsInLine(RgPoint rPt, RgLine rLine)
{
bool flag = false;
return(flag);
}