/// <summary>
/// Defines the shape of a Post Tensioned Cable.
/// </summary>
public PtcShapeType(PtcShapeStart start, PtcShapeEnd end, IEnumerable <PtcShapeInner> intermediates)
{
DenormalizePriorInflectionParameters(ref end, ref intermediates);
StartPoint = start;
EndPoint = end;
IntermediatePoint = intermediates.ToArray();
}
/// <summary>
/// Change normalization on PriorInflectionPosition from normalized along parent element to be normalized between ptc shape base points.
/// </summary>
/// <param name="end"></param>
/// <param name="intermediates"></param>
private void DenormalizePriorInflectionParameters(ref PtcShapeEnd end, ref IEnumerable <PtcShapeInner> intermediates)
{
var sortedInner = intermediates.OrderBy(i => i.Position).ToList();
List <PtcShapeInner> newIntermediates = new List <PtcShapeInner>();
double Denormalize(double t, double x1, double x2)
{
if (t < x1 || t > x2)
{
throw new ArgumentException($"PriorInflectionPosition must be a parameter between prior end next basepoint but got (position: {t}, prior: {x1}, next: {x2})");
}
return((t - x1) / (x2 - x1));
}
// Normalize inner
for (int i = 0; i < sortedInner.Count; i++)
{
var next = sortedInner[i];
if (next.PriorInflectionPosition.HasValue)
{
double x1 = 0.0;
if (i > 0)
{
x1 = sortedInner[i - 1].Position;
}
double x2 = next.Position;
double t = next.PriorInflectionPosition.Value;
newIntermediates.Add(new PtcShapeInner(next.Position, next.Z, next.Tangent, Denormalize(t, x1, x2)));
}
else
{
newIntermediates.Add(next);
}
}
intermediates = newIntermediates;
// Normalize end
if (sortedInner.Any() && end.PriorInflectionPosition.HasValue && end.NormalizedInflectionPosition)
{
double x1 = sortedInner.Last().Position;
double x2 = 1.0;
double t = end.PriorInflectionPosition.Value;
end = new PtcShapeEnd(end.Z, end.Tangent, Denormalize(t, x1, x2))
{
NormalizedInflectionPosition = false
};
}
}
protected override void SolveInstance(IGH_DataAccess DA)
{
double z = 0.0;
if (!DA.GetData("z'", ref z))
{
return;
}
double tangent = 0.0;
if (!DA.GetData("Tangent", ref tangent))
{
return;
}
double?priorInflectionParam = null;
DA.GetData("PriorInflection x'", ref priorInflectionParam);
PtcShapeEnd end = new PtcShapeEnd(z, tangent, priorInflectionParam);
DA.SetData("End", end);
}
protected override void SolveInstance(IGH_DataAccess DA)
{
PtcShapeStart start = null;
if (!DA.GetData("Start", ref start) || start == null)
{
return;
}
List <PtcShapeInner> intermediates = new List <PtcShapeInner>();
DA.GetDataList("Intermidiate", intermediates);
PtcShapeEnd end = null;
if (!DA.GetData("End", ref end) || end == null)
{
return;
}
PtcShapeType shape = new PtcShapeType(start, end, intermediates);
DA.SetData("Shape", shape);
}
