// -----------------------------
private static IList <EqnCalc> TestEquationParser()
{
IList <EqnCalc> retList = new List <EqnCalc>();
IList <string> eqnStrings = new List <string>();
// Engineering: Heat: Heat Exchanger
// Engineering: Equipment: Heat Exchanger
eqnStrings.Add("Q = m*cp*(T1-T2)");
eqnStrings.Add("Q = U*A*DTLM");
eqnStrings.Add("DTLM = (DT1-DT2)/LOG(DT1/DT2)");
eqnStrings.Add("DTLM = ((Thi-Tco)-(Tho-Tci))/LOG((Thi-Tco)/(Tho-Tci))");
// Geometry: Solid Bodies: Cylinder
eqnStrings.Add("V = PI*r^2*h");
eqnStrings.Add("Am = 2*PI*r*h");
eqnStrings.Add("A0 = 2*PI*r*(r+h)");
foreach (var item in eqnStrings)
{
JongErrWarn errW = null;
FunctionCalc funCalc = _contentManager.CreateFunctionCalcFromExpression(item, null, null, out errW);
if (funCalc != null)
{
retList.Add((EqnCalc)funCalc);
}
}
return(retList);
}
private static Result <bool> RearrangeOnce(EqnCalc eqCalc, int argIndexToPreserve, ContentManager cm)
{
FunctionCalc lhsFunCalc = eqCalc.Inputs[0] as FunctionCalc;
Function lhsFunction = lhsFunCalc?.Function;
if (lhsFunction == null)
{
return(Result <bool> .Bad($"Unexpected error: lhs is not a funcalc"));
}
SingleResult argToPreserve = lhsFunCalc.Inputs[argIndexToPreserve];
// Create placeholders that the function rearrangements will treat as variables
IList <string> argPlaceholders = new List <string>();
IDictionary <string, SingleResult> placeFillers = new Dictionary <string, SingleResult>();
for (int i = 0; i < lhsFunCalc.Inputs.Count; i++)
{
string placeholder = $"v{i}";
argPlaceholders.Add(placeholder);
if (i != argIndexToPreserve)
{
placeFillers.Add(placeholder, lhsFunCalc.Inputs[i]);
}
}
string resPlaceHolder = "res";
placeFillers.Add(resPlaceHolder, eqCalc.Inputs[1]);
// Ask the function definition for a rearrangement that isolates the required variable
Result <string> r_rearrangement = lhsFunction.GetRearrangement(argPlaceholders, resPlaceHolder, argIndexToPreserve);
if (r_rearrangement.IsNotGood() || string.IsNullOrEmpty(r_rearrangement.Value))
{
return(Result <bool> .Bad($"Rearrangement failed: {r_rearrangement.Message}"));
}
// Parse the rearrangement expression
JongErrWarn errW = null;
FunctionCalc newRhs = cm.CreateFunctionCalcFromExpression(r_rearrangement.Value, "", null, out errW);
if (newRhs == null)
{
return(Result <bool> .Bad($"Rearrangement cannot be used: {errW?.ErrWarnString}"));
}
// Subsitute for the placeholders
Result <bool> r_ok = SubsituteForPlaceholders(newRhs, placeFillers);
if (r_ok.IsNotGood())
{
return(Result <bool> .Bad($"Error substituting for placeholders: {r_ok.Message}"));
}
// Update the eqCalc with the rearrangement
eqCalc.Inputs[1] = newRhs;
eqCalc.Inputs[0] = argToPreserve;
return(Result <bool> .Good(true));
}
public async Task <EqnCalc> ShowCreateEquation(ContentManager cm)
{
Tuple <bool, string, string, string, IList <VarInfo> > tpl;
tpl = await ShowAddEquation(cm);
try
{
bool bCancelled = tpl.Item1;
string equationString = null;
string userEquationString = null;
string eqDescription = null;
IList <VarInfo> varInfos = null;
if (!bCancelled)
{
equationString = tpl.Item2;
userEquationString = tpl.Item3;
eqDescription = tpl.Item4;
varInfos = tpl.Item5;
Debug.WriteLine("equationString={0}, userEquationString={1},eqDescription={2}");
Debug.WriteLine(varInfos);
JongErrWarn errW = null;
FunctionCalc funCalc = cm.CreateFunctionCalcFromExpression(equationString, eqDescription, varInfos, out errW);
EqnCalc equationCalc = funCalc as EqnCalc;
if (equationCalc == null)
{
// TODO
}
else
{
// TODO
//EquationLibraries.Add(equationCalc);
return(equationCalc);
}
}
}
catch (Exception ex)
{
Logging.LogException(ex);
throw;
}
return(null);
}
public static void AddEquationToSectionNode(ContentManager contentManager, SectionNode sectionNode, EquationDetails ed)
{
string description = "";
if (!string.IsNullOrEmpty(ed.Name))
{
description += ((string.IsNullOrEmpty(description) ? "" : " ") + ed.Name);
}
if (!string.IsNullOrEmpty(ed.Reference))
{
description += ((string.IsNullOrEmpty(description) ? "" : " ") + ed.Reference);
}
if (!string.IsNullOrEmpty(ed.Description))
{
description += ((string.IsNullOrEmpty(description) ? "" : " ") + ed.Description);
}
// ----------------------
JongErrWarn errW = null;
FunctionCalc funCalc = contentManager.CreateFunctionCalcFromExpression(ed.EquationAsText, description, ed.VariableInfos, out errW);
// ----------------------
if (funCalc != null)
{
// ------------- Record the test values if there are any
if ((ed.TestValues != null) && (ed.TestValues.Count > 0))
{
funCalc.TestValues = new Dictionary </*variable name*/ string, double>();
for (int i = 0; i < ed.VariableInfos.Count; i++)
{
VarInfo vi = ed.VariableInfos[i];
funCalc.TestValues.Add(vi.Name, ed.TestValues[i]);
}
}
funCalc.ExpectedDimensions = new Dictionary </*variable name*/ string, Dimensions>();
if (ed.VariableInfos != null)
{
foreach (VarInfo vi in ed.VariableInfos)
{
funCalc.ExpectedDimensions.Add(vi.Name, vi.ParamType?.Dimensions);
}
}
// -------------
sectionNode.EqnCalcs.Add((EqnCalc)funCalc);
}
}
public void RefreshEquationCalc(string eqnString)
{
UserEquationString = eqnString;
if (eqnString?.Length > 0)
{
JongErrWarn errW = null;
FunctionCalc funCalc = ContentManager.CreateFunctionCalcFromExpression(eqnString, null, null, out errW);
EquationCalc = funCalc as EqnCalc;
EquationMsg = errW?.ErrWarnString;
}
else
{
EquationCalc = null;
EquationMsg = DefaultEquationMsg;
}
OnPropertyChanged("UserEquationString");
OnPropertyChanged("EquationCalc");
OnPropertyChanged("EquationMsg");
}