/// <summary>
/// Calculates derivation tree
/// </summary>
/// <param name="tree">Tree to calculate</param>
/// <param name="variableName">Name of variable</param>
/// <returns>Tree of derivation</returns>
static public ObjectFormulaTree Derivation(this ObjectFormulaTree tree, string variableName)
{
if (tree.Operation is IDerivationOperation)
{
IDerivationOperation op = tree.Operation as IDerivationOperation;
return(op.Derivation(tree, variableName));
}
if (ElementaryBinaryOperation.IsInteger(tree.Operation.ReturnType))
{
ElementaryRealConstant op = new ElementaryRealConstant(0);
return(new ObjectFormulaTree(op, new List <ObjectFormulaTree>()));
}
if (tree.Operation is OptionalOperation)
{
OptionalOperation op = tree.Operation as OptionalOperation;
op = op.Clone() as OptionalOperation;
List <ObjectFormulaTree> list = new List <ObjectFormulaTree>();
list.Add(tree[0]);
for (int i = 1; i < 3; i++)
{
list.Add(tree[i].Derivation(variableName));
}
return(new ObjectFormulaTree(op, list));
}
return(null);
}
/// <summary>
/// Creates formula
/// </summary>
/// <param name="tree">Operation tree</param>
/// <param name="level">Formula level</param>
/// <param name="sizes">Sizes of symbols</param>
/// <returns>The formula</returns>
public MathFormula CreateFormula(ObjectFormulaTree tree, byte level, int[] sizes)
{
return(OptionalOperation.CreateFormula(this, tree, level, sizes, symbol + ""));
}
