/// <summary>
/// Lấy điểm chiếu của một điểm lên đường thẳng
/// </summary>
/// <param name="line">Đường thẳng đang xét</param>
/// <param name="point">Điểm đang xét</param>
/// <returns></returns>
public static XYZ GetProjectPoint(Curve line, XYZ point)
{
if (IsPointInLineOrExtend(CheckGeometry.ConvertLine(line), point))
{
return(point);
}
XYZ vecL = GeomUtil.SubXYZ(line.GetEndPoint(1), line.GetEndPoint(0));
XYZ vecP = GeomUtil.SubXYZ(point, line.GetEndPoint(0));
Plane p = Plane.CreateByOriginAndBasis(line.GetEndPoint(0), GeomUtil.UnitVector(vecL), GeomUtil.UnitVector(GeomUtil.CrossMatrix(vecL, vecP)));
return(GetProjectPoint(p, point));
}
public static double GetAngle2(XYZ targetVec, XYZ vecX, XYZ vecY, XYZ vecZ)
{
vecX = vecX.Normalize(); vecY = vecY.Normalize(); vecZ = vecZ.Normalize();
if (!IsEqual(vecX.DotProduct(vecY), 0))
{
throw new Exception("Two basis X and Y is not perpecular!");
}
if (!IsEqual(vecX.CrossProduct(vecY), vecZ))
{
throw new Exception("Three basises are not a coordiante!");
}
Plane pl = Plane.CreateByOriginAndBasis(XYZ.Zero, vecX, vecY);
XYZ pjPnt = CheckGeometry.GetProjectPoint(pl, targetVec);
return(GetAngle(targetVec, pjPnt, vecZ));
}
