/// <summary>
/// Creates the graph associated to this expression, when the given parameter ranges over the X axis
/// </summary>
/// <param name="context">The interpretation context</param>
/// <param name="parameter">The parameters of *the enclosing function* for which the graph should be created</param>
/// <returns></returns>
public override Functions.Graph createGraph(InterpretationContext context, Parameter parameter)
{
Functions.Graph retVal = base.createGraph(context, parameter);
Functions.PredefinedFunctions.Cast cast = Called.Ref as Functions.PredefinedFunctions.Cast;
if (cast != null)
{
// In case of cast, just take the graph of the enclosed expression
Parameter param = (Parameter)cast.FormalParameters[0];
retVal = cast.createGraphForParameter(context, param);
}
Function calledFunction = Called.Ref as Function;
Dictionary <Parameter, Expression> parameterAssociation = null;
if (calledFunction == null)
{
calledFunction = Called.GetValue(context) as Function;
parameterAssociation = createParameterAssociation(calledFunction);
}
else
{
parameterAssociation = ParameterAssociation;
}
Parameter Xaxis = null;
foreach (KeyValuePair <Parameter, Expression> pair in parameterAssociation)
{
if (pair.Value.Ref == parameter)
{
if (Xaxis == null)
{
Xaxis = pair.Key;
}
else
{
Root.AddError("Cannot evaluate graph for function call " + ToString() + " which has more than 1 parameter used as X axis");
Xaxis = null;
break;
}
}
}
int token = context.LocalScope.PushContext();
calledFunction.AssignParameters(context, AssignParameterValues(context, calledFunction, false));
if (Xaxis != null)
{
retVal = calledFunction.createGraphForParameter(context, Xaxis);
}
else
{
retVal = Function.createGraphForValue(GetValue(context));
}
context.LocalScope.PopContext(token);
return(retVal);
}
/// <summary>
/// Provides the surface of this function if it has been statically defined
/// </summary>
/// <param name="context">the context used to create the surface</param>
/// <param name="xParam">The X axis of this surface</param>
/// <param name="yParam">The Y axis of this surface</param>
/// <returns>The surface which corresponds to this expression</returns>
public override Functions.Surface createSurface(Interpreter.InterpretationContext context, Parameter xParam, Parameter yParam)
{
Functions.Surface retVal = base.createSurface(context, xParam, yParam);
Functions.Function function = getFunction(context);
Functions.PredefinedFunctions.Cast cast = Called.Ref as Functions.PredefinedFunctions.Cast;
if (cast != null)
{
// In case of cast, just take the surface of the enclosed expression
Expression actual = (Expression)ActualParameters[0];
retVal = actual.createSurface(context, xParam, yParam);
}
else
{
Parameter Xaxis = null;
Parameter Yaxis = null;
if (function == null)
{
function = Called.getCalled(context) as Function;
}
SelectXandYAxis(context, xParam, yParam, function, out Xaxis, out Yaxis);
if (Xaxis != null || Yaxis != null)
{
int token = context.LocalScope.PushContext();
function.AssignParameters(context, AssignParameterValues(context, function, true));
retVal = function.createSurfaceForParameters(context, Xaxis, Yaxis);
context.LocalScope.PopContext(token);
}
else
{
Values.IValue value = GetValue(context);
if (value != null)
{
retVal = Functions.Surface.createSurface(value, xParam, yParam);
}
else
{
throw new Exception("Cannot create surface for expression");
}
}
}
retVal.XParameter = xParam;
retVal.YParameter = yParam;
return(retVal);
}