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//static const char* sccsid = "@(#)Expr_PolyFunction.cxx 3.2 95/01/10"; // Do not delete this line. Used by sccs.
// Copyright: Matra-Datavision 1991
// File: Expr_PolyFunction.cxx
// Created: Tue Jul 2 11:11:43 1991
// Author: Arnaud BOUZY
// <adn>
#ifndef DEB
#define No_Standard_RangeError
#define No_Standard_OutOfRange
#endif
#include <Expr_PolyFunction.ixx>
#include <Expr_Array1OfNamedUnknown.hxx>
#include <Expr_FunctionDerivative.hxx>
#include <Expr_Product.hxx>
#include <Expr_Sum.hxx>
#include <Expr_Operators.hxx>
#include <Expr.hxx>
#include <Standard_DimensionError.hxx>
Expr_PolyFunction::Expr_PolyFunction (const Handle(Expr_GeneralFunction)& func, const Expr_Array1OfGeneralExpression& exps)
{
for (Standard_Integer i=exps.Lower();i <= exps.Upper(); i++) {
AddOperand(exps(i));
}
myFunction = func;
}
Handle(Expr_GeneralFunction) Expr_PolyFunction::Function () const
{
return myFunction;
}
Handle(Expr_GeneralExpression) Expr_PolyFunction::ShallowSimplified () const
{
Standard_Boolean allval = Standard_True;
Standard_Integer max = NbSubExpressions();
Standard_Integer i;
for (i = 1; (i <= max) && allval ; i++) {
allval = SubExpression(i)->IsKind(STANDARD_TYPE(Expr_NumericValue));
}
if (allval) {
TColStd_Array1OfReal tabval(1,max);
Expr_Array1OfNamedUnknown tabvar(1,max);
for (i=1; i<=max;i++) {
tabval(i) = Handle(Expr_NumericValue)::DownCast(SubExpression(i))->GetValue();
tabvar(i) = myFunction->Variable(i);
}
Standard_Real res = myFunction->Evaluate(tabvar,tabval);
return new Expr_NumericValue(res);
}
Handle(Expr_PolyFunction) me =this;
return me;
}
Handle(Expr_GeneralExpression) Expr_PolyFunction::Copy () const
{
Standard_Integer max = NbSubExpressions();
Expr_Array1OfGeneralExpression vars(1,max);
for (Standard_Integer i = 1; i <= max; i++) {
vars(i) = Expr::CopyShare(SubExpression(i));
}
return new Expr_PolyFunction(myFunction,vars);
}
Standard_Boolean Expr_PolyFunction::IsIdentical (const Handle(Expr_GeneralExpression)& Other) const
{
if (!Other->IsKind(STANDARD_TYPE(Expr_PolyFunction))) {
return Standard_False;
}
if (Other->NbSubExpressions() != NbSubExpressions()) {
return Standard_False;
}
Handle(Expr_PolyFunction) pother = Handle(Expr_PolyFunction)::DownCast(Other);
Handle(Expr_GeneralFunction) fother = pother->Function();
if (!fother->IsIdentical(Function())) {
return Standard_False;
}
Standard_Integer max = NbSubExpressions();
Handle(Expr_GeneralExpression) opother;
for (Standard_Integer i = 1; i<=max;i++) {
opother = pother->SubExpression(i);
if (!opother->IsIdentical(SubExpression(i))) {
return Standard_False;
}
}
return Standard_True;
}
Standard_Boolean Expr_PolyFunction::IsLinear () const
{
if (!ContainsUnknowns()) {
return Standard_True;
}
for (Standard_Integer i=1; i<= NbOperands(); i++) {
if (!Operand(i)->IsLinear()) {
return Standard_False;
}
if (!myFunction->IsLinearOnVariable(i)) {
return Standard_False;
}
}
return Standard_True;
}
Handle(Expr_GeneralExpression) Expr_PolyFunction::Derivative (const Handle(Expr_NamedUnknown)& X) const
{
Handle(Expr_GeneralExpression) myop;
Handle(Expr_NamedUnknown) thevar;
Handle(Expr_GeneralFunction) partderfunc;
Handle(Expr_PolyFunction) partder;
Handle(Expr_Product) partprod;
Standard_Integer max = NbSubExpressions();
Expr_Array1OfGeneralExpression theops(1,max);
for (Standard_Integer k=1; k<= max; k++) {
theops(k) = Operand(k);
}
Expr_SequenceOfGeneralExpression thesum;
for (Standard_Integer i = 1; i <= max; i++) {
thevar = myFunction->Variable(i);
myop = SubExpression(i);
partderfunc = myFunction->Derivative(thevar);
partder = new Expr_PolyFunction(partderfunc,theops);
partprod = partder->ShallowSimplified() * myop->Derivative(X);
thesum.Append(partprod->ShallowSimplified());
}
Handle(Expr_Sum) res = new Expr_Sum(thesum);
return res->ShallowSimplified();
}
Standard_Real Expr_PolyFunction::Evaluate(const Expr_Array1OfNamedUnknown& vars, const TColStd_Array1OfReal& vals) const
{
Standard_Integer max = NbSubExpressions();
Expr_Array1OfNamedUnknown varsfunc(1,max);
TColStd_Array1OfReal valsfunc(1,max);
for (Standard_Integer i = 1; i <= max ; i++) {
varsfunc(i) = myFunction->Variable(i);
valsfunc(i) = SubExpression(i)->Evaluate(vars,vals);
}
return myFunction->Evaluate(varsfunc,valsfunc);
}
TCollection_AsciiString Expr_PolyFunction::String() const
{
TCollection_AsciiString res = myFunction->GetStringName();
res += "(";
Standard_Integer max = NbOperands();
for (Standard_Integer i=1; i<= max; i++) {
res += Operand(i)->String();
if (i != max) {
res += ",";
}
}
res += ")";
return res;
}
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