46 lines
1.4 KiB
C++
46 lines
1.4 KiB
C++
#include "HEP/Detectors/DetectorChamber.h"
|
|
#include <cmath>
|
|
|
|
namespace uLib {
|
|
|
|
MuonEvent DetectorChamber::ProjectMuonEvent(const MuonEvent &muon) const {
|
|
MuonEvent projectedMuon = muon;
|
|
|
|
// Transform the local projection plane to world coordinates
|
|
HLine3f worldPlane = this->GetWorldProjectionPlane();
|
|
HPoint3f P = worldPlane.origin;
|
|
HVector3f N = worldPlane.direction;
|
|
|
|
HPoint3f X_in = muon.LineIn().origin;
|
|
HPoint3f X_out = muon.LineOut().origin;
|
|
|
|
// Let's use distance to the plane for the first part and keep the logic consistent.
|
|
float dist_in = std::abs((X_in - P).dot(N));
|
|
float dist_out = std::abs((X_out - P).dot(N));
|
|
|
|
const HLine3f &chosenLine = (dist_in <= dist_out) ? muon.LineIn() : muon.LineOut();
|
|
HPoint3f X_chosen = chosenLine.origin;
|
|
|
|
// Project X_chosen into the plane defined by P and normal N
|
|
// X_proj = X_chosen - ((X_chosen - P) . N / (N . N)) * N
|
|
float dot = (X_chosen - P).dot(N);
|
|
float n_sq = N.dot(N);
|
|
|
|
HPoint3f X_proj = X_chosen;
|
|
if (n_sq > 0) {
|
|
X_proj = X_chosen - (dot / n_sq) * N;
|
|
}
|
|
|
|
// Define the projected line with projected origin and original direction
|
|
HLine3f projectedLine;
|
|
projectedLine.origin = X_proj;
|
|
projectedLine.direction = chosenLine.direction;
|
|
|
|
// Set both input and output lines of the projected muon to the same projected line
|
|
projectedMuon.LineIn() = projectedLine;
|
|
projectedMuon.LineOut() = projectedLine;
|
|
|
|
return projectedMuon;
|
|
}
|
|
|
|
} // namespace uLib
|