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How can I convert an array of structures to an array of Point3D objects in C #?

I intend to create a 3D mesh object. The mesh object has a 3D point array of approx. 50,000 units. Due to the number of 3D points, the array must be initialized on the heap.

The required code is, in short, the following:

class MyMesh
{
    public MeshGeometry3D Mesh3D  // Properties tanimlaniyor
    {
        get { return GetMesh3D(); }
    }

    public struct mystruct
    {
        public int m_i;
        public int m_j;
        public int m_k;

        public mystruct(int i, int j, int k)
        {
            m_i = i;
            m_j = j;
            m_i = k;
        }
    }

    private mystruct[] mypts = 
    {
        new mystruct(20 , 7 , 7),   
        .
        .
        new mystruct(23 , 5 , 7)     
    };
}

Could you please explain how one can convert the 3D coordinates in the mystruct

above to 3D structure coordinates System.Windows.Media.Media3D.Point3D

.

Thanks in advance.

Öner YILMAZ

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3 answers


If you have an actual list of 50,000 mystruct

objects, would it be better to just create them as Point3D

structs in the first place?

Just do Find and Replace:

new mystruct (

and replace it with

new Point3D (



Then change:

private mystruct[] mypts =

at

private Point3D[] mypts =
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Are you looking for something like this ...

List<Point3D> points = mypts.Select<mystruct, Point3D> (x => 
                                      new Point3D(x.m_i, x.m_j, x.m_k))
                            .ToList();

Alternatively, you can expose the iterator that returned IEnumerable like this ...



public IEnumerable<Point3D> Points()
{
    foreach(var point in mypts)
    {
        yield return new Point3D(point.m_i, point.m_j, point.m_k, );
    }
}

[add validation / error handling code]

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If you need to keep hoax objects and also enable Point3D features, you can use something like:

class MyMesh {
    ...

    public Point3D[] ToPoint3D()
    {
        Point3D[] p3D = null;   // or set it to an Empty Point3D array, if necessary

        if (mpts.Length > 0)
        {
            p3D = new Point3D[mpts.Length]

            for (int x = 0; x < mypts.Length; x++)
            {
                p3D[x].X = new Point3D(mypts[x].m_i;
                p3D[x].Y = new Point3D(mypts[x].m_j;
                p3D[x].Z = new Point3D(mypts[x].m_k;
            }
        }

        return p3D;
    }

    ...
}
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