/// <summary>
/// Gets the internal force based on only this load at defined position <see cref="x"/>.
/// </summary>
/// <param name="elm">The elm.</param>
/// <param name="x">The x.</param>
/// <returns></returns>
/// <exception cref="System.NotImplementedException"></exception>
public override Force GetInternalForceAt(Element1D elm, double x)
{
if (elm is FrameElement2Node)
{
var frElm = elm as FrameElement2Node;
var l = (frElm.EndNode.Location - frElm.StartNode.Location).Length;
var w = GetLocalDistributedLoad(elm);
var gf1 = -GetGlobalEquivalentNodalLoads(elm)[0];
var f1 = new Force();
f1.Forces = frElm.TransformGlobalToLocal(gf1.Forces);
f1.Moments = frElm.TransformGlobalToLocal(gf1.Moments);
var f2 = new Force(new Vector(w.X * x, w.Y * x, w.Z * x), new Vector());
var buf = f1.Move(new Point(0, 0, 0), new Point(x, 0, 0)) +
f2.Move(new Point(x / 2, 0, 0), new Point(x, 0, 0));
return(-buf);
}
throw new NotImplementedException();
}
