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#include "TsMagneticFieldQuadrupole.hh"

#include "TsParameterManager.hh"

#include "TsVGeometryComponent.hh"

#include "G4TransportationManager.hh"

TsMagneticFieldQuadrupole::TsMagneticFieldQuadrupole(TsParameterManager* pM, TsGeometryManager* gM,
													 TsVGeometryComponent* component):
TsVMagneticField(pM, gM, component) {
	ResolveParameters();
}

TsMagneticFieldQuadrupole::~TsMagneticFieldQuadrupole() {;}


void TsMagneticFieldQuadrupole::ResolveParameters() {
	fGradientX = fPm->GetDoubleParameter(fComponent->GetFullParmName("MagneticFieldGradientX"), "magnetic field gradient");
	fGradientY = fPm->GetDoubleParameter(fComponent->GetFullParmName("MagneticFieldGradientY"), "magnetic field gradient");

	TsVMagneticField::ResolveParameters();
}


void TsMagneticFieldQuadrupole::GetFieldValue(const G4double Point[3], G4double* Field) const{
	const G4ThreeVector localPoint = fNavigator->GetGlobalToLocalTransform().TransformPoint(G4ThreeVector(Point[0],Point[1],Point[2]));

	G4ThreeVector B_local = G4ThreeVector(fGradientX * localPoint.y(),
										  fGradientY * localPoint.x(),
										  0);

	G4ThreeVector B_global = G4ThreeVector(fComponent->GetRotRelToWorld()->inverse().rowX() * B_local,
										   fComponent->GetRotRelToWorld()->inverse().rowY() * B_local,
										   fComponent->GetRotRelToWorld()->inverse().rowZ() * B_local);

	Field[0] = B_global.x() ;
	Field[1] = B_global.y() ;
	Field[2] = B_global.z() ;
}
