moving points in C# (Point3d location ...)

hi,

I am having trouble iterating a translation of points. As far as I have seen, the function Translate doesn´t work with Point3d, it only works with the class Point, which is defined by a Location which is established by the function get and there comes the whole mess!

I am attaching the code I tried (which definitely doesn´t work) in case somebody can give me a hand :-)

private void RunScript(List<Point3d> origin, List<Point3d> destination, ref object vectors, ref object points) { List<Vector3d> vec = new List<Vector3d>(); List<Rhino.Geometry.Point> pts = new List<Rhino.Geometry.Point>(); for (int i = 0; i < origin.Count - 2; i++) { Vector3d vector = new Vector3d((destination[i].X - origin[i + 1].X), (destination[i].Y - origin[i + 1].Y), (destination[i].Z - origin[i + 1].Z)); //Rhino.Geometry.Point punto = new Rhino.Geometry.Point(origin[i].X, origin[i].Y, origin[i].Z); // this doesn´t work, has to be defined by a location //Location localizacion = new Location(origin[i]); //Rhino.Geometry.Point punto = new Rhino.Geometry.Point(localizacion); //wrong again! if(origin[i + 1].Translate(vector)) //Point3d doesn´t work with Translate { pts.Add(origin[i + 1]); } vec.Add(vector); } points = pts; vectors = vec; }

Thanks in advance

Cheers!

Replies to This Discussion

Permalink Reply by Giulio Piacentino on November 5, 2010 at 4:27pm

Hi Miguel,

I do not exactly know what this does, but this code expresses the idea you give in the text.

List<Vector3d> vec = new List<Vector3d>();

List<Point3d> pts = new List<Point3d>();



for (int i = 0; i < origin.Count - 1; i++)

{

Vector3d vector = destination[i] - origin[i + 1];

pts.Add(origin[i + 1] + vector);

vec.Add(vector);

}



points = pts;

vectors = vec;

I hope this helps.

- Giulio
________________________
giulio@mcneel.com
McNeel Europe, Barcelona

Attachments:

miguel.ghx, 29 KB

Permalink Reply by Miguel Vidal on November 6, 2010 at 2:42pm

Hi Giulio,

Thanks for your response. Actually I think I didn´t explain correctly, the question was:

- how to use the function translate with points
- how to define a Rhino.Geometry.Point with "location"

Permalink Reply by Giulio Piacentino on November 6, 2010 at 3:17pm

Hi Miguel,

- how to use the function translate with points
The Point3d structure does not have a Translate method. Here is the list of all methods of Point3d
You can add a Vector3d to a Point3d and two Point3ds using the + operator.
Or you can call the Transform method with a Matrix.
On the other hand, the class Point has a translate method that it inherits from GeometryBase. You can read about it below.

- how to define a Rhino.Geometry.Point with "location"
You probably do not need to do this. Point is a class that wraps the tiny Point3d structure. But if in any case you want to construct a Point class, you will need to use its constructor. Example:
A = new Rhino.Geometry.Point(new Point3d(5,6,7));
You can modify the location assigning the Location property:

Rhino.Geometry.Point p;

p = new Rhino.Geometry.Point(new Point3d(5,6,7));

// later...

p.Location = new Point3d(12, 12, 12);

// or, alternatively, as Point has a translate method

p.Translate(new Vector3d(7, 6, 5));

I hope this helps,

- Giulio
________________________
giulio@mcneel.com
McNeel Europe, Barcelona

Permalink Reply by Miguel Vidal on November 7, 2010 at 4:14am

Thanks, Giulio. Sure it helped! I didn´t know how "location" worked

Cheers

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