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#include <IntSurf.ixx>
#include <Precision.hxx>
#include <gp.hxx>
#include <gp_Dir.hxx>
#include <gp_Vec.hxx>
#include <IntSurf_Transition.hxx>
//--------------------------------------------------------------
//-- IntSurf::MakeTransition(Vtgint,Vtgrst,Normale,Transline,Transarc);
//--
//-- tgFirst = Tangente Ligne Intersection
//-- tgSecond = Tangenet Restriction
//-- Normale = Normale a la surface
void IntSurf::MakeTransition (const gp_Vec& TgFirst,
const gp_Vec& TgSecond,
const gp_Dir& Normale,
IntSurf_Transition& TFirst,
IntSurf_Transition& TSecond)
{
// Effectuer le produit mixte normale, tangente 1, tangente 2
// pour avoir le type de la transition.
gp_Vec pvect(TgSecond.Crossed(TgFirst));
Standard_Real NTgSecond = TgSecond.Magnitude();
Standard_Real NTgFirst = TgFirst.Magnitude();
Standard_Real NTgSecondNTgFirstAngular = NTgSecond*NTgFirst*Precision::Angular();
if(NTgFirst <= Precision::Confusion()) {
TFirst.SetValue(Standard_True,IntSurf_Undecided);
TSecond.SetValue(Standard_True,IntSurf_Undecided);
}
else if ( (NTgSecond <= Precision::Confusion())
|| (pvect.Magnitude()<= NTgSecondNTgFirstAngular)) {
TFirst.SetValue(Standard_True,IntSurf_Unknown,TgFirst.Dot(TgSecond)<0.0);
TSecond.SetValue(Standard_True,IntSurf_Unknown,TgFirst.Dot(TgSecond)<0.0);
}
else {
Standard_Real yu = pvect.Dot(Normale);
yu/=NTgSecond*NTgFirst;
if (yu>0.0001) {
TFirst.SetValue(Standard_False,IntSurf_In);
TSecond.SetValue(Standard_False,IntSurf_Out);
}
else if(yu<-0.0001) {
TFirst.SetValue(Standard_False,IntSurf_Out);
TSecond.SetValue(Standard_False,IntSurf_In);
}
else {
#if 0
//-- MODIF XAB
gp_Vec V1(TgSecond.X() / NTgSecond,TgSecond.Y() / NTgSecond, TgSecond.Z() / NTgSecond);
gp_Vec V2(TgFirst.X() / NTgFirst,TgFirst.Y() / NTgFirst, TgFirst.Z() / NTgFirst);
pvect = V1.Crossed(V2);
yu = pvect.Dot(Normale);
if (yu>0.0000001) {
TFirst.SetValue(Standard_False,IntSurf_In);
TSecond.SetValue(Standard_False,IntSurf_Out);
}
else if(yu<-0.0000001) {
TFirst.SetValue(Standard_False,IntSurf_Out);
TSecond.SetValue(Standard_False,IntSurf_In);
}
else {
TFirst.SetValue(Standard_True,IntSurf_Undecided);
TSecond.SetValue(Standard_True,IntSurf_Undecided);
}
#else
TFirst.SetValue(Standard_True,IntSurf_Undecided);
TSecond.SetValue(Standard_True,IntSurf_Undecided);
#endif
}
}
}
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