Time for action – terrain heights

To place our tank appropriately on the terrain, we first need to calculate, then place our tank there. This is done in the following steps:

1. 1. Add a helper method to the Terrain class to calculate the height based on a given coordinate as follows:

   #region Helper Methods
   public float GetHeight(float x, float z)
   {
       int xmin = (int)Math.Floor(x);
       int xmax = xmin + 1;
       int zmin = (int)Math.Floor(z);
       int zmax = zmin + 1;
   
       if (
           (xmin < 0) || (zmin < 0) || 
           (xmax > heights.GetUpperBound(0)) || 
           (zmax > heights.GetUpperBound(1)))
       {
           return 0;
       }
   
       Vector3 p1 = new Vector3(xmin, heights[xmin, zmax], zmax);
       Vector3 p2 = new Vector3(xmax, heights[xmax, zmin], zmin);
       Vector3 p3;
   
       if ((x - xmin) + (z - zmin) <= 1)
       {
           p3 = new Vector3(xmin, heights[xmin, zmin], zmin);
       }
       else
       {
           p3 = new Vector3(xmax, heights[xmax, zmax], zmax);
       }
   
       Plane plane = new...