About XYZ class operation, by using two XYZs

[dcj219]

XYZ p1,  XYZ p2,  double length, how can I operate these paras to get XYZ p3?  Location of p3 is on the line between p1 and p2,  distance between p1 and p3 is the length. I can't find something useful for this in api document. _(:з)∠)_  thx

[jeremytammik · Accepted solution]

There are hundreds of examples showing similar calculation on The Building Coder blog: 

https://thebuildingcoder.typepad.com/

For example, to get p3 in the middle between p1 and p2, you can use something like this, from The Building Coder samples Util class:

https://github.com/jeremytammik/the_building_coder_samples

https://github.com/jeremytammik/the_building_coder_samples/blob/master/BuildingCoder/BuildingCoder/U...

https://github.com/jeremytammik/the_building_coder_samples/blob/master/BuildingCoder/BuildingCoder/U...

    /// <summary>
    /// Return the midpoint between two points.
    /// </summary>
    public static XYZ Midpoint( XYZ p, XYZ q )
    {
      return 0.5 * (p + q);
    }