public static string EvaluateAttributeUserText(RhinoSceneHierarchyNode InNode, string ValueFormula)
{
if (!ValueFormula.StartsWith("%<") || !ValueFormula.EndsWith(">%"))
{
// Nothing to evaluate, just return the string as-is.
return(ValueFormula);
}
RhinoObject NodeObject = InNode.Info.RhinoModelComponent as RhinoObject;
RhinoObject ParentObject = null;
RhinoSceneHierarchyNode CurrentNode = InNode;
while (CurrentNode.LinkedNode != null)
{
CurrentNode = CurrentNode.LinkedNode;
ParentObject = CurrentNode.Info.RhinoModelComponent as RhinoObject;
}
// In case this is an instance of a block sub-object, the ID held in the formula may not have been updated
// with the definition object ID. We need to replace the ID with the definition object ID, otherwise the formula
// will not evaluate correctly.
if (InNode.LinkedNode != null && !InNode.LinkedNode.bIsRoot)
{
int IdStartIndex = ValueFormula.IndexOf("(\"") + 2;
int IdEndIndex = ValueFormula.IndexOf("\")");
if (IdStartIndex >= 0 && IdEndIndex > IdStartIndex)
{
ValueFormula = ValueFormula.Remove(IdStartIndex, IdEndIndex - IdStartIndex);
ValueFormula = ValueFormula.Insert(IdStartIndex, NodeObject.Id.ToString());
}
}
return(RhinoApp.ParseTextField(ValueFormula, NodeObject, ParentObject));
}