topic Re : Set Angled UCS in .NET Forum

Set Angled UCS

abdulhaseeb114 — Thu, 02 Mar 2017 06:34:55 GMT

Hi,

I am getting 3 points from user and then I need to set the UCS in angled as shown in the picture

Please Help Me.....

Re: Set Angled UCS

kerry_w_brown — Thu, 02 Mar 2017 06:45:25 GMT

Have you tried something like this :

https://knowledge.autodesk.com/search-result/caas/CloudHelp/cloudhelp/2015/ENU/AutoCAD-NET/files/GUID-096085E3-5AD5-4454-BF10-C9177FDB5979-htm.html

Regards,

Re : Set Angled UCS

_gile — Thu, 02 Mar 2017 07:39:33 GMT

Hi,

Maybe this is more readable:

private Matrix3d Ucs3Points(Point3d origin, Point3d pointX, Point3d pointY)
{
    Vector3d toXAxis = origin.GetVectorTo(pointX).GetNormal();
    Vector3d toZAxis = toXAxis.CrossProduct(origin.GetVectorTo(pointY)).GetNormal();
    Vector3d toYAxis = toZAxis.CrossProduct(toXAxis).GetNormal();
    return Matrix3d.AlignCoordinateSystem(
        Point3d.Origin, Vector3d.XAxis, Vector3d.YAxis, Vector3d.ZAxis,
        origin, toXAxis, toYAxis, toZAxis);
}

Use with current UCS defined points (e.g. got with ed.GetPoint()):

ed.CurrentUserCoordinateSystem *= Ucs3Points(org, ptX, ptY);

Use with WCS defined points:

ed.CurrentUserCoordinateSystem = Ucs3Points(org, ptX, ptY);