Gabriele Cosmo
123 lines
2.6 KiB
Plaintext
123 lines
2.6 KiB
Plaintext
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inline G4double G4Line::GetPMax() { return -1; }
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inline G4Point3D G4Line::GetPoint(G4double param) { return pnt+param*dir; }
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inline G4double G4Line::GetPPoint(const G4Point3D& pt)
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{
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return (pt-pnt)*invDir;
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}
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////////////////////////////////////////////////////////////////////////////
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inline void G4Line::Init(const G4Point3D& pnt0, const G4Vector3D& dir0) {
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pnt= pnt0;
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dir= dir0;
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invDir= dir*(1/dir.mag2());
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v= dir.unit();
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}
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inline G4Point3D G4Line::GetPnt() const {
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return pnt;
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}
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inline G4Vector3D G4Line::GetDir() const {
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return dir;
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}
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///////////////////////////////////////////////////////////////////////////
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inline void G4Line::InitBounded() {
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bBox.Init(GetStart(), GetEnd());
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}
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///////////////////////////////////////////////////////////////////////////
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#include "G4CurveRayIntersection.hh"
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/*
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inline void G4Line::IntersectRay2D(const G4Ray& ray,
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G4CurveRayIntersection& is)
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{
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is.Init(*this, ray);
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G4CurveRayIntersection isTmp(*this, ray);
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const G4Point3D& s= ray.GetStart();
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const G4Vector3D& d= ray.GetDir();
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G4double num= (s.x()-pnt.x())*v.y()-(s.y()-pnt.y())*v.x();
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G4double denom= d.y()*v.x()-d.x()*v.y();
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if (denom < kAngTolerance) {
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if (num < kCarTolerance) {
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// identical lines
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isTmp.ResetDistance(kCarTolerance);
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is.Update(isTmp);
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isTmp.Reset(GetPStart(), GetStart());
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is.UpdateWithPointOnCurve(isTmp);
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isTmp.Reset(GetPEnd(), GetEnd());
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is.UpdateWithPointOnCurve(isTmp);
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} else {
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// parallel lines
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}
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} else {
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// properly intersecting lines
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isTmp.ResetDistance(num/denom);
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is.Update(isTmp);
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}
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}
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*/
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inline G4int G4Line::IntersectRay2D(const G4Ray& ray)
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{
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const G4Point3D& s= ray.GetStart();
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const G4Vector3D& d= ray.GetDir();
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G4double num1= (pnt.x()-s.x())*d.y()-(pnt.y()-s.y())*d.x();
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G4double num2= (pnt.x()-s.x())*dir.y()-(pnt.y()-s.y())*dir.x();
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G4double denom= d.x()*dir.y()-d.y()*dir.x();
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G4int nbinter = 0;
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if (fabs(denom) < kCarTolerance)
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{
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if (fabs(num1) < kCarTolerance)
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{
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// identical lines
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}
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else
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{
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// parallel lines
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}
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}
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else
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{
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// properly intersecting lines
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G4double u = num1/denom;
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G4double t = num2/denom;
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if( (u > -kCarTolerance/2) && (u < kCarTolerance/2) )
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u = 0;
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if( (t > -kCarTolerance/2) && (t < kCarTolerance/2) )
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t = 0;
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// test the validity of the results
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if(t>=0 && u>=0 && u<=1)
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// test if the point is on the line
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if( t==0 || u==0 )
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return 999;
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else
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nbinter = 1;
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}
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return nbinter;
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}
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