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// File: LProp_AnalyticCurInf.cxx
// Created: Mon Sep 5 10:31:35 1994
// Author: Yves FRICAUD
// <yfr@ecolox>
#include <LProp_AnalyticCurInf.ixx>
#include <ElCLib.hxx>
//=======================================================================
//function : LProp_AnalyticCurInf
//purpose :
//=======================================================================
LProp_AnalyticCurInf::LProp_AnalyticCurInf()
{
}
//=======================================================================
//function : Perform
//purpose :
//=======================================================================
void LProp_AnalyticCurInf::Perform (const GeomAbs_CurveType CType,
const Standard_Real UFirst,
const Standard_Real ULast,
LProp_CurAndInf& Result)
{
Standard_Boolean IsMin = Standard_True;
Standard_Boolean IsMax = Standard_False;
switch (CType) {
case GeomAbs_Ellipse:
{
Standard_Real U1,U2,U3,U4;
Standard_Real UFPlus2PI = UFirst + 2*PI;
U1 = ElCLib::InPeriod(0.0 ,UFirst,UFPlus2PI);
U2 = ElCLib::InPeriod(PI/2. ,UFirst,UFPlus2PI);
U3 = ElCLib::InPeriod(PI ,UFirst,UFPlus2PI);
U4 = ElCLib::InPeriod(3.*PI/2.,UFirst,UFPlus2PI);
if (UFirst <= U1 && U1 <= ULast) {Result.AddExtCur(U1, IsMin);}
if (UFirst <= U2 && U2 <= ULast) {Result.AddExtCur(U2, IsMax);}
if (UFirst <= U3 && U3 <= ULast) {Result.AddExtCur(U3, IsMin);}
if (UFirst <= U4 && U4 <= ULast) {Result.AddExtCur(U4, IsMax);}
}
break;
case GeomAbs_Hyperbola:
if (UFirst <= 0.0 && ULast >= 0.0) {
Result.AddExtCur(0.0 , Standard_True);
}
break;
case GeomAbs_Parabola:
if (UFirst <= 0.0 && ULast >= 0.0) {
Result.AddExtCur(0.0 , Standard_True);
}
break;
#ifndef DEB
default:
break;
#endif
}
}
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