Gabriele Cosmo
370 lines
12 KiB
Plaintext
370 lines
12 KiB
Plaintext
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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//
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// $Id: G4VSurface.icc,v 1.2 2004/05/28 13:13:35 gcosmo Exp $
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// GEANT4 tag $Name: geant4-06-02 $
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//
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//
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// --------------------------------------------------------------------
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// G4VSurface class inline methods
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//
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// Author:
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// 01-Aug-2002 - Kotoyo Hoshina (hoshina@hepburn.s.chiba-u.ac.jp)
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//
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// History:
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// 13-Nov-2003 - O.Link (Oliver.Link@cern.ch), Integration in Geant4
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// from original version in Jupiter-2.5.02 application.
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// --------------------------------------------------------------------
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//=====================================================================
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//* DistanceToPlaneWithV ----------------------------------------------
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inline
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G4double G4VSurface::DistanceToPlaneWithV(const G4ThreeVector &p,
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const G4ThreeVector &v,
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const G4ThreeVector &x0,
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const G4ThreeVector &n0,
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G4ThreeVector &xx)
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{
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G4double t = (n0 * (x0 - p)) / (n0 * v);
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xx = p + t * v;
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return t;
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}
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//=====================================================================
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//* DistanceToPlane ---------------------------------------------------
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inline
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G4double G4VSurface::DistanceToPlane(const G4ThreeVector &p,
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const G4ThreeVector &x0,
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const G4ThreeVector &n0,
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G4ThreeVector &xx)
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{
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// DistanceToPlane :
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// Calculate distance to plane in local coordinate,
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// then return distance and global intersection points.
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//
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// p - location of flying particle
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// x0 - reference point of surface
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// xx - a foot of perpendicular line from p to the plane
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// t - distance from xx to p
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// n - a unit normal of this plane from plane to p.
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//
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// equation of plane:
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// n*(x - x0) = 0;
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//
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// vector to xx:
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// xx = p - t*n
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//
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// where
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// t = n * (p - x0) / abs(n)
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//
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G4double t;
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G4ThreeVector n = n0.unit();
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t = n * (p - x0);
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xx = p - t * n;
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return t;
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}
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//=====================================================================
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//* DistanceToPlane ---------------------------------------------------
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inline
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G4double G4VSurface::DistanceToPlane(const G4ThreeVector &p,
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const G4ThreeVector &x0,
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const G4ThreeVector &t1,
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const G4ThreeVector &t2,
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G4ThreeVector &xx,
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G4ThreeVector &n)
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{
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// DistanceToPlane :
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// Calculate distance to plane in local coordinate,
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// then return distance and global intersection points.
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// t1 - 1st. vector lying on the plane
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// t2 - 2nd. vector lying on the plane
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n = (t1.cross(t2)).unit();
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return DistanceToPlane(p, x0, n, xx);
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}
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//=====================================================================
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//* DistanceToLine ----------------------------------------------------
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inline
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G4double G4VSurface::DistanceToLine(const G4ThreeVector &p,
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const G4ThreeVector &x0,
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const G4ThreeVector &d,
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G4ThreeVector &xx)
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{
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// DistanceToLine :
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// Calculate distance to line,
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// then return distance and global intersection points.
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//
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// p - location of flying particle
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// x0 - reference point of line
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// d - direction vector of line
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// xx - a foot of perpendicular line from p to the plane
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// t - distance from xx to p
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//
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// Equation
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//
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// distance^2 = |(xx - p)|^2
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// with
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// xx = x0 + t*d
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//
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// (d/dt)distance^2 = (d/dt)|((x0 + t*d) - p)|^2
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// = 2*t*|d|^2 + 2*d*(x0 - p)
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// = 0 // smallest distance
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// then
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// t = - d*(x0 - p) / |d|^2
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//
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G4double t;
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G4ThreeVector dir = d.unit();
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t = - dir * (x0 - p); // |dir|^2 = 1.
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xx = x0 + t * dir;
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G4ThreeVector dist = xx - p;
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return dist.mag();
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}
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//=====================================================================
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//* IsAxis0 -----------------------------------------------------------
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inline
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G4bool G4VSurface::IsAxis0(G4int areacode) const
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{
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if (areacode & sAxis0) return true;
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return false;
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}
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//=====================================================================
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//* IsAxis1 -----------------------------------------------------------
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inline
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G4bool G4VSurface::IsAxis1(G4int areacode) const
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{
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if (areacode & sAxis1) return true;
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return false;
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}
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//=====================================================================
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//* IsOutside ---------------------------------------------------------
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inline
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G4bool G4VSurface::IsOutside(G4int areacode) const
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{
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if (areacode & sInside) return false;
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return true;
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}
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//=====================================================================
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//* IsInside ----------------------------------------------------------
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inline
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G4bool G4VSurface::IsInside(G4int areacode, G4bool testbitmode) const
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{
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if (areacode & sInside) {
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if (testbitmode) {
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return true;
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} else {
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if (!((areacode & sBoundary) || (areacode & sCorner))) return true;
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}
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}
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return false;
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}
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//=====================================================================
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//* IsBoundary --------------------------------------------------------
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inline
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G4bool G4VSurface::IsBoundary(G4int areacode, G4bool testbitmode) const
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{
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if ((areacode & sBoundary) == sBoundary) {
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if (testbitmode) {
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return true;
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} else {
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if ((areacode & sInside) == sInside) return true;
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}
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}
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return false;
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}
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//=====================================================================
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//* IsCorner ----------------------------------------------------------
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inline
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G4bool G4VSurface::IsCorner(G4int areacode, G4bool testbitmode) const
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{
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if ((areacode & sCorner) == sCorner) {
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if (testbitmode) {
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return true;
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} else {
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if ((areacode & sInside) == sInside) return true;
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}
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}
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return false;
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}
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//=====================================================================
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//* GetAxisType -------------------------------------------------------
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inline
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G4int G4VSurface::GetAxisType(G4int areacode, G4int whichaxis) const
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{
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G4int axiscode = areacode & sAxisMask & whichaxis;
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if (axiscode == (sAxisX & sAxis0) ||
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axiscode == (sAxisX & sAxis1)) {
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return sAxisX;
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} else if (axiscode == (sAxisY & sAxis0) ||
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axiscode == (sAxisY & sAxis1)) {
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return sAxisY;
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} else if (axiscode == (sAxisZ & sAxis0) ||
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axiscode == (sAxisZ & sAxis1)) {
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return sAxisZ;
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} else if (axiscode == (sAxisRho & sAxis0) ||
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axiscode == (sAxisRho & sAxis1)) {
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return sAxisRho;
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} else if (axiscode == (sAxisPhi & sAxis0) ||
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axiscode == (sAxisPhi & sAxis1)) {
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return sAxisPhi;
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} else {
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G4cerr << "ERROR - G4VSurface::GetAxisType()" << G4endl
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<< " areacode = " << areacode << G4endl;
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G4Exception("G4VSurface::GetAxisType()","NotSupported",
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FatalException, "Configuration not supported.");
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}
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return 1;
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}
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//=====================================================================
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//* ComputeGlobalPoint ------------------------------------------------
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inline
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G4ThreeVector G4VSurface::ComputeGlobalPoint(const G4ThreeVector &lp) const
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{
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return fRot * G4ThreeVector(lp) + fTrans;
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}
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//=====================================================================
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//* ComputeGlobalPoint ------------------------------------------------
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inline
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G4ThreeVector G4VSurface::ComputeLocalPoint(const G4ThreeVector &gp) const
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{
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return fRot.inverse() * G4ThreeVector(gp) - fTrans;
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}
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//=====================================================================
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//* ComputeGlobalDirection --------------------------------------------
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inline
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G4ThreeVector G4VSurface::ComputeGlobalDirection(const G4ThreeVector &lp) const
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{
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return fRot * G4ThreeVector(lp);
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}
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//=====================================================================
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//* ComputeLocalDirection ---------------------------------------------
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inline
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G4ThreeVector G4VSurface::ComputeLocalDirection(const G4ThreeVector &gp) const
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{
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return fRot.inverse() * G4ThreeVector(gp);
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}
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//=====================================================================
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//* SetNeighbours -----------------------------------------------------
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inline
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void G4VSurface::SetNeighbours(G4VSurface* axis0min, G4VSurface* axis1min,
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G4VSurface* axis0max, G4VSurface* axis1max)
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{
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fNeighbours[0] = axis0min;
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fNeighbours[1] = axis1min;
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fNeighbours[2] = axis0max;
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fNeighbours[4] = axis1max;
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}
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//=====================================================================
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//* GetNeighbours -----------------------------------------------------
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inline
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G4int G4VSurface::GetNeighbours(G4int areacode, G4VSurface** surfaces)
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{
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G4int i = 0;
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if (areacode & (sAxis0 | sAxisMin)) {
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surfaces[i] = fNeighbours[0];
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i++;
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}
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if (areacode & (sAxis1 | sAxisMin)) {
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surfaces[i] = fNeighbours[1];
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i++;
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if (i == 2) return i;
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}
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if (areacode & (sAxis0 | sAxisMax)) {
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surfaces[i] = fNeighbours[2];
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i++;
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if (i == 2) return i;
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}
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if (areacode & (sAxis1 | sAxisMax)) {
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surfaces[i] = fNeighbours[3];
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i++;
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if (i == 2) return i;
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}
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return i;
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}
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//=====================================================================
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//* GetCorner ---------------------------------------------------------
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inline
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G4ThreeVector G4VSurface::GetCorner(G4int areacode) const
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{
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if (!(areacode & sCorner)){
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G4cerr << "ERROR - G4VSurface::GetCorner()" << G4endl
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<< " areacode = " << areacode << G4endl;
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G4Exception("G4VSurface::GetCorner()","InvalidSetup",
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FatalException, "Area code must represent corner.");
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}
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if ((areacode & sCMin1Min) == sCMin1Min) {
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return fCorners[0];
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} else if ((areacode & sCMax1Min) == sCMax1Min) {
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return fCorners[1];
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} else if ((areacode & sCMax1Max) == sCMax1Max) {
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return fCorners[2];
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} else if ((areacode & sCMin1Max) == sCMin1Max) {
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return fCorners[3];
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} else {
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G4cerr << "ERROR - G4VSurface::GetCorner()" << G4endl
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<< " areacode = " << areacode << G4endl;
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G4Exception("G4VSurface::GetCorner()", "NotSupported",
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FatalException, "Configuration not supported.");
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}
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return fCorners[0];
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}
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