Reverse a List

Hi Rafael

Does this help.

Hello Brenden,

Thank you for your help!!!

Unfortunately it sends me an error when I used the statement "point4.Reverse", "point4" is a list of points.

I'm attaching a picture

Regards

Hello Brenden,

Thank you for your help!!!

Unfortunately it sends me an error when I used the statement "point4.Reverse", "point4" is a list of points.

I'm attaching a picture

Regards

Hi Rafael,

This one reminded me of a similar issue I had with some curves.

Maybe you could think of it in another direction.

The points could be ordered by their X values in your case. This would in effect reverse the list. But it also provides future flexibility where you might place points in a random order but need to re-arrange them in a specific order like X, Y or Z direction.

Using a similar approach to that Brenden suggested above this could be achieve with an expression node.

Place an expression node and in the Value field type in:
from V in Point7 orderby V.X

The “V” is not important just a variable so it could be anything I believe

Then just disconnect the wire between the endpoint of Line 5 and connect the expression to this endpoint.

That should fix it up.

I have attached a dgn example

Let me know how you go

Thanks

Wayne

1768.OrderOfPoints.dgn

Hi Wayne,

very nice solution.

Do you know some help-manual where we can find tricks like these?

Ingo

Hi Ingo,

Thanks

I am asked the same question here in our office. Volker and the community are a very good starting point. I have learnt so much just asking questions here. The other great resource are the SIGs. So much info there every month!

However I am just about to release some videos to our team on GC tips so I will package them up and get them online for everyone to enjoy. I will start a thread in the forum so keep an eye out for it. I am no expert but you might find it useful.

Thanks

Wayne

Hi Wayne,

thanks for your hints.

I know the forum probably is the best place for getting good advice for tricky problems. But sometimes it probably would help if there was a solid way to get some basics explained.

For anyone following: here are some good ones. But I like just plain text help too - so if anyone has some knowlege of a manual out there please post.

And Wayne I'm looking forward to your video package - any help is appreciated.

Ingo

Hi Rafael,

I tried a bit with this one.

It seem as if the syntax has to be the other way round:

transaction 1 modelChange 'Add baseCS'
{
    node User.Objects.baseCS Bentley.GC.NodeTypes.CoordinateSystem
    {
        Technique                 = 'AtModelOrigin';
        DGNModelName              = 'Design Model';
        SymbolSize                = 1;
    }
}

transaction 2 modelChange 'Add line1, line1_EndPoint, line1_StartPoint, line2, line2_EndPoint, line2_StartPoint'
{
    node User.Objects.line1_EndPoint Bentley.GC.NodeTypes.Point
    {
        Technique                 = 'OnPlane';
        Plane                     = baseCS.XYPlane;
        XTranslation              = <free> 16509.8223048126;
        YTranslation              = <free> 610.905526160702;
        Color                     = -1;
        LevelName                 = 'A-WALL-CONC';
        LineStyleName             = 'STYLE_ByLevel';
        LineWeight                = -1;
    }
    node User.Objects.line1_StartPoint Bentley.GC.NodeTypes.Point
    {
        Technique                 = 'OnPlane';
        Plane                     = baseCS.XYPlane;
        XTranslation              = <free> 6637.58036974987;
        YTranslation              = <free> 538.358987137388;
        Color                     = -1;
        LevelName                 = 'A-WALL-CONC';
        LineStyleName             = 'STYLE_ByLevel';
        LineWeight                = -1;
    }
    node User.Objects.line1 Bentley.GC.NodeTypes.Line
    {
        Technique                 = 'ByPoints';
        StartPoint                = line1_StartPoint;
        EndPoint                  = line1_EndPoint;
        Color                     = -1;
        LevelName                 = 'A-WALL-CONC';
        LineStyleName             = 'STYLE_ByLevel';
        LineWeight                = -1;
    }
    node User.Objects.line2_StartPoint Bentley.GC.NodeTypes.Point
    {
        Technique                 = 'OnPlane';
        Plane                     = baseCS.XYPlane;
        XTranslation              = <free> 16840.6576261299;
        YTranslation              = <free> -5076.57885616648;
        Color                     = -1;
        LevelName                 = 'A-WALL-CONC';
        LineStyleName             = 'STYLE_ByLevel';
        LineWeight                = -1;
    }
    node User.Objects.line2_EndPoint Bentley.GC.NodeTypes.Point
    {
        Technique                 = 'OnPlane';
        Plane                     = baseCS.XYPlane;
        XTranslation              = <free> 6445.86233955;
        YTranslation              = <free> -5147.35756845185;
        Color                     = -1;
        LevelName                 = 'A-WALL-CONC';
        LineStyleName             = 'STYLE_ByLevel';
        LineWeight                = -1;
    }
    node User.Objects.line2 Bentley.GC.NodeTypes.Line
    {
        Technique                 = 'ByPoints';
        StartPoint                = line2_StartPoint;
        EndPoint                  = line2_EndPoint;
        Color                     = -1;
        LevelName                 = 'A-WALL-CONC';
        LineStyleName             = 'STYLE_ByLevel';
        LineWeight                = -1;
    }
}

transaction 3 modelChange 'Add point1, point2'
{
    node User.Objects.point2 Bentley.GC.NodeTypes.Point
    {
        Technique                 = 'ByNumberAlongCurve';
        Curve                     = line2;
        NumberAlongCurve          = 5;
    }
    node User.Objects.point1 Bentley.GC.NodeTypes.Point
    {
        Technique                 = 'ByNumberAlongCurve';
        Curve                     = line1;
        NumberAlongCurve          = 5;
    }
}

transaction 4 modelChange 'Add expression1'
{
    node User.Objects.expression1 Bentley.GC.NodeTypes.Expression
    {
        Technique                 = 'Default';
        Value                     = from r in point2 orderby r.X;
    }
}

transaction 5 modelChange 'Add line3; change expression1, line2, line2_EndPoint, line2_StartPoint, point1, point2'
{
    node User.Objects.line2_StartPoint Bentley.GC.NodeTypes.Point
    {
        GraphLocation             = {332.537, 403.003, 0.0, 142.443};
    }
    node User.Objects.line2_EndPoint Bentley.GC.NodeTypes.Point
    {
        GraphLocation             = {332.537, 585.446};
    }
    node User.Objects.line2 Bentley.GC.NodeTypes.Line
    {
        GraphLocation             = {606.537, 403.003};
    }
    node User.Objects.point1 Bentley.GC.NodeTypes.Point
    {
        GraphLocation             = {915.579, 36.317};
    }
    node User.Objects.point2 Bentley.GC.NodeTypes.Point
    {
        GraphLocation             = {943.433, 339.438};
    }
    node User.Objects.expression1 Bentley.GC.NodeTypes.Expression
    {
        GraphLocation             = {1181.222, 138.884};
    }
    node User.Objects.line3 Bentley.GC.NodeTypes.Line
    {
        Technique                 = 'ByPoints';
        StartPoint                = point1;
        EndPoint                  = expression1;
        GraphLocation             = {1342.411, 336.653};
    }
}

transaction 6 modelChange 'Change line3 support'
{
    node User.Objects.line3 Bentley.GC.NodeTypes.Line
    {
        Technique                 = 'ByPoints';
        EndPoint                  = Reverse(point2);
    }
}

The last one shows the support change.

EndPoint    = Reverse(point2)

Even if Wayne's solution looks cooler I find this a bit more understandable.

regards

Ingo