* about the suitability of this software for any purpose. It is *
* provided "as is" without express or implied warranty. *
**************************************************************************/
-
/* $Id$ */
+/** @file AliFMDDetector.cxx
+ @author Christian Holm Christensen <cholm@nbi.dk>
+ @date Mon Mar 27 12:36:27 2006
+ @brief Sub-detector base class implementation
+ @ingroup FMD_base
+*/
//____________________________________________________________________
//
+// AliFMDDetector.
+//
+// Base class for concrete FMD detectors, like AliFMD1, AliFMD2,
+// AliFMD3.
// Utility class to help implement the FMD geometry. This provides
// the interface for the concrete geometry implementations of the FMD
// sub-detectors.
//
// Latest changes by Christian Holm Christensen
//
+
+#include <TGeoManager.h> // ROOT_TGeoManager
+#include <TGeoPhysicalNode.h> // ROOT_TGeoPhysicalNode
+#include <TGeoMatrix.h> // ROOT_TGeoMatrix
+#include <TMath.h> // ROOT_TMath
+
#include "AliFMDDetector.h" // ALIFMDSUBDETECTOR_H
#include "AliFMDRing.h" // ALIFMDRING_H
-#include <AliLog.h> // ALILOG_H
+#include "AliFMDDebug.h" // ALIFMDDEBUG_H ALILOG_H
//====================================================================
ClassImp(AliFMDDetector)
AliFMDDetector::AliFMDDetector(Int_t id, AliFMDRing* inner, AliFMDRing* outer)
: TNamed(Form("FMD%d", id), "Forward multiplicity ring"),
fId(id),
+ fInnerZ(0.),
+ fOuterZ(0.),
+ fInnerHoneyLowR(0.),
+ fInnerHoneyHighR(0.),
+ fOuterHoneyLowR(0.),
+ fOuterHoneyHighR(0.),
fInner(inner),
- fOuter(outer)
+ fOuter(outer),
+ fInnerTransforms(0),
+ fOuterTransforms(0)
{
- SetHoneycombThickness();
- SetAlThickness();
+ // Constructor
+ //
+ // ID Id of detector (1,2, or 3)
+ // INNER Inner ring geometry
+ // OUTER Outer ring geometry (if any)
+ //
SetInnerHoneyLowR(0);
SetInnerHoneyHighR(0);
SetInnerZ(0);
SetOuterHoneyHighR(0);
}
+//____________________________________________________________________
+AliFMDDetector::AliFMDDetector(const AliFMDDetector& other)
+ : TNamed(other),
+ fId(other.fId),
+ fInnerZ(0.),
+ fOuterZ(0.),
+ fInnerHoneyLowR(0.),
+ fInnerHoneyHighR(0.),
+ fOuterHoneyLowR(0.),
+ fOuterHoneyHighR(0.),
+ fInner(other.fInner),
+ fOuter(other.fOuter),
+ fInnerTransforms(other.fInnerTransforms),
+ fOuterTransforms(other.fOuterTransforms)
+{
+ // Copy constructor
+ SetInnerHoneyLowR(other.GetInnerHoneyLowR());
+ SetInnerHoneyHighR(other.GetInnerHoneyHighR());
+ SetInnerZ(other.GetInnerZ());
+ SetOuterZ(other.GetOuterZ());
+ SetOuterHoneyLowR(other.GetOuterHoneyLowR());
+ SetOuterHoneyHighR(other.GetOuterHoneyHighR());
+}
+
+//____________________________________________________________________
+AliFMDDetector&
+AliFMDDetector::operator=(const AliFMDDetector& other)
+{
+ // Assignment operator
+ if (&other == this) return *this;
+ SetName(other.GetName());
+ SetTitle(other.GetTitle());
+ fId = other.fId;
+ fInner = other.fInner;
+ fOuter = other.fOuter;
+ fInnerTransforms = other.fInnerTransforms;
+ fOuterTransforms = other.fOuterTransforms;
+ SetInnerHoneyLowR(other.GetInnerHoneyLowR());
+ SetInnerHoneyHighR(other.GetInnerHoneyHighR());
+ SetInnerZ(other.GetInnerZ());
+ SetOuterZ(other.GetOuterZ());
+ SetOuterHoneyLowR(other.GetOuterHoneyLowR());
+ SetOuterHoneyHighR(other.GetOuterHoneyHighR());
+ return *this;
+}
+
//____________________________________________________________________
void
AliFMDDetector::Init()
{
+ // Initialize.
if (fInner) {
SetInnerHoneyLowR(fInner->GetLowR() + 1.);
SetInnerHoneyHighR(fInner->GetHighR() + 1.);
if (fOuter) {
SetOuterHoneyLowR(fOuter->GetLowR() + 1.);
SetOuterHoneyHighR(fOuter->GetHighR() + 1.);
+ }
+}
+
+//____________________________________________________________________
+Bool_t
+AliFMDDetector::HasAllTransforms(Char_t ring) const
+{
+ // Check if we got all transformations for a given ring. Return
+ // true in that case.
+ AliFMDRing* r = GetRing(ring);
+ if (!r) return kTRUE;
+ TObjArray* matricies = (r == fInner ? fInnerTransforms : fOuterTransforms);
+ if (!matricies) return kTRUE;
+ if (matricies->GetEntries() == r->GetNModules()) return kTRUE;
+ return kFALSE;
+}
+
+#define IS_NODE_THIS(name) \
+ (name[0] == 'F' && name[2] == 'M' && name[1] == Char_t(48+fId) && \
+ (name[3] == 'T' || name[3] == 'B'))
+#define IS_NODE_SENSOR(name) \
+ (name[0] == 'F' && (name[2] == 'B' || name[2] == 'F') && name[3] == 'H')
+//#define IS_NODE_SENSOR(name)
+// (name[0] == 'F' && name[2] == 'S' && name[3] == 'E')
+#define IS_NODE_HALF(name) \
+ (name[0] == 'F' && name[2] == 'M' && (name[3] == 'B' || name[3] == 'T'))
+#define HALF_FORMAT "FMD/FMD%d_%c"
+#define SENSOR_FORMAT "FMD/FMD%d_%c/FMD%c_%02d"
+
+//____________________________________________________________________
+void
+AliFMDDetector::InitTransformations()
+{
+ // Find all local<->global transformations for this detector.
+ if ((!fInner || (fInner && fInnerTransforms)) &&
+ (!fOuter || (fOuter && fOuterTransforms))) {
+ AliFMDDebug(5, ("Transforms for FMD%d already registered", fId));
+ return;
+ }
+ AliFMDDebug(5, ("Initializing transforms for FMD%d", fId));
+ if (!gGeoManager) {
+ AliFatal("No TGeoManager defined");
+ return;
+ }
+
+ // Implementation using alignable volume names.
+ // Make container of transforms
+ if (fInner && !fInnerTransforms)
+ fInnerTransforms = new TObjArray(fInner->GetNModules());
+ if (fOuter && !fOuterTransforms)
+ fOuterTransforms = new TObjArray(fOuter->GetNModules());
+
+ // Loop over bottom/top
+ for (size_t ihalf = 0; ihalf < 2; ihalf++) {
+ char half = (ihalf == 0 ? 'T' : 'B');
+ TString path(Form(HALF_FORMAT, fId, half));
+ TGeoPNEntry* entry = gGeoManager->GetAlignableEntry(path.Data());
+ if (!entry) {
+ AliError(Form("Alignable entry for half-detector \"%s\" not found!",
+ path.Data()));
+ continue;
+ }
+ TGeoPhysicalNode* pn = entry->GetPhysicalNode();
+ if (!pn) {
+ AliWarning(Form("Making physical volume for \"%s\"", path.Data()));
+ pn = gGeoManager->MakeAlignablePN(entry);
+ if (!pn) {
+ AliError(Form("No physical node for \"%s\"", path.Data()));
+ continue;
+ }
+ }
+ }
+
+ // Loop over rings
+ for (size_t iring = 0; iring < 2; iring++) {
+ char ring = (iring == 0 ? 'I' : 'O');
+ TObjArray* trans = 0;
+ AliFMDRing* r = 0;
+ switch (ring) {
+ case 'I': r = fInner; trans = fInnerTransforms; break;
+ case 'O': r = fOuter; trans = fOuterTransforms; break;
+ }
+ if (!r || !trans) continue;
+
+ Int_t nModules = r->GetNModules();
+ if (nModules <= 0) continue;
+
+ // Loop over bottom/top
+ for (size_t ihalf = 0; ihalf < 2; ihalf++) {
+ char half = (ihalf == 0 ? 'T' : 'B');
+ Int_t base = (half == 'T' ? 0 : nModules / 2);
+
+ // Loop over modules in this half ring
+ for (Int_t imod = 0; imod < nModules / 2; imod++) {
+ // Find physical node entry
+ TString path(Form(SENSOR_FORMAT, fId, half, ring, base+imod));
+ TGeoPNEntry* entry = gGeoManager->GetAlignableEntry(path.Data());
+ if (!entry) {
+ AliError(Form("Alignable entry for sensor \"%s\" not found!",
+ path.Data()));
+ continue;
+ }
+ TGeoPhysicalNode* pn = entry->GetPhysicalNode();
+ if (!pn) {
+ AliWarning(Form("Making physical volume for \"%s\"", path.Data()));
+ pn = gGeoManager->MakeAlignablePN(entry);
+ if (!pn) {
+ AliError(Form("No physical node for \"%s\"", path.Data()));
+ continue;
+ }
+ }
+
+ const TGeoMatrix* pm = pn->GetMatrix();
+ if (!pm) {
+ AliError(Form("No matrix for path \"%s\"", path.Data()));
+ continue;
+ }
+ // Get transformation matrix for this node, and store it.
+ TGeoMatrix* t = new TGeoHMatrix(*pm);
+ trans->AddAt(t, base+imod);
+ AliFMDDebug(5, ("Found matrix for path \"%s\": %p",path.Data(),pm));
+ }
+ }
+ }
+ if (HasAllTransforms('I') && HasAllTransforms('O')) return;
+
+ // Alternative implementation using TGeoIter.
+ TGeoVolume* topVolume = gGeoManager->GetTopVolume();
+ if (!topVolume) {
+ AliFatal("No top-level volume defined");
+ return;
+ }
+ // Make an iterator
+ TGeoIterator next(topVolume);
+ TGeoNode* node = 0;
+
+ // Find the node corresponding to this detector, and then find the
+ // sensor volumes
+ Bool_t thisNodeFound = kFALSE;
+ Bool_t allInners = HasAllTransforms('I');
+ Bool_t allOuters = HasAllTransforms('O');
+
+ while ((node = static_cast<TGeoNode*>(next()))
+ && !(allInners && allOuters)) {
+ // Get nodes names
+ const Char_t* name = node->GetName();
+ if (!name) continue;
+ AliFMDDebug(50, ("Got volume %s", name));
+ // Check if this node is this detector
+ // The base offset for numbers in the ASCII table is 48
+ if (IS_NODE_THIS(name)) {
+ AliFMDDebug(20, ("Found detector node '%s' for FMD%d", name, fId));
+ thisNodeFound = kTRUE;
+ }
+ // if the detector was found, then we're on that branch, and we
+ // check if this node represents a module in that branch.
+ if (thisNodeFound && IS_NODE_SENSOR(name)) {
+ AliFMDDebug(20, ("Found sensor node '%s' for FMD%d", name, fId));
+ // Get the ring Id.
+ Char_t ringid = name[1];
+
+ // Get the approprate ring
+ AliFMDRing* ring = GetRing(ringid);
+ if (!ring) continue;
+
+ // Check whether we have all the modules we need for this ring,
+ // and if so, go on to the next node.
+ Bool_t& done = (ring == fInner ? allInners : allOuters);
+ if ((done = HasAllTransforms(ringid))) {
+ AliFMDDebug(20, ("Already has all module transforms for ring %c",
+ ringid));
+ continue;
+ }
+
+ // Get the approprate container
+ TObjArray* matricies = (ringid == 'i' || ringid == 'I'
+ ? fInnerTransforms : fOuterTransforms);
+
+ // Get the copy (module) number, and check that it hasn't
+ // already been added to the container.
+ Int_t copy = node->GetNumber();
+ if (matricies->At(copy)) {
+ AliWarning(Form("Have a transformation for module %d in ring %c",
+ copy, ringid));
+ continue;
+ }
+
+ // Get the global transformation matrix, and store it.
+ TGeoMatrix* trans = new TGeoHMatrix(*(next.GetCurrentMatrix()));
+ matricies->AddAt(trans, copy);
+
+ }
}
+}
+
+//____________________________________________________________________
+void
+AliFMDDetector::SetAlignableVolumes() const
+{
+ // Set alignable volumes.
+ // This will define the alignable volumes.
+ // That is currently, the modules and the half-rings.
+
+ AliFMDDebug(10, ("Making alignable volumes for FMD%d", fId));
+ if (!gGeoManager) {
+ AliFatal("No TGeoManager defined");
+ return;
+ }
+ TGeoVolume* topVolume = gGeoManager->GetTopVolume();
+ if (!topVolume) {
+ AliFatal("No top-level volume defined");
+ return;
+ }
+
+ // Make an iterator
+ TGeoIterator next(topVolume);
+ next.Reset(topVolume);
+ next.SetTopName(Form("/%s_1", topVolume->GetName()));
+ TGeoNode* node = 0;
+
+ Int_t nInnerSensor = (fInner ? fInner->GetNModules() : 0);
+ Int_t nOuterSensor = (fOuter ? fOuter->GetNModules() : 0);
+ // Find the node corresponding to this detector, and then find the
+ // sensor volumes
+ Bool_t thisNodeFound = kFALSE;
+ Char_t thisHalf = '\0';
+ Int_t iInnerSensor = 0;
+ Int_t iOuterSensor = 0;
+ Bool_t hasTop = false;
+ Bool_t hasBottom = false;
+
+ TString path, align;
+ while ((node = static_cast<TGeoNode*>(next()))
+ && (iInnerSensor < nInnerSensor || iOuterSensor < nOuterSensor
+ || !hasBottom || !hasTop)) {
+ // Get nodes names
+ const Char_t* name = node->GetName();
+ if (!name) continue;
+ AliFMDDebug((name[0] == 'F' ? 40 : 50), ("Got volume %s", name));
+ // Check if this node is this detector
+ // The base offset for numbers in the ASCII table is 48
+ if (IS_NODE_THIS(name)) {
+ AliFMDDebug(20, ("Found detector node '%s' for FMD%d", name, fId));
+ thisNodeFound = kTRUE;
+ }
+
+ // if a half ring is found, then we're on that branch, and we
+ // check if this node represents a half ring on that branch
+ if (thisNodeFound && IS_NODE_HALF(name)) {
+ AliFMDDebug(30, ("Found half node '%s' for FMD%d", name, fId));
+ // Get the half Id.
+ thisHalf = name[3];
+
+ // Check if we're done
+ Bool_t done = (thisHalf == 'T' ? hasTop : hasBottom);
+ if (done) {
+ AliFMDDebug(20, ("Already has all halves for detector %c",name[1]));
+ continue;
+ }
+
+ switch (thisHalf) {
+ case 'T': hasTop = true; break;
+ case 'B': hasBottom = true; break;
+ default:
+ AliWarning(Form("Unknown part '%c' of FMD%d", thisHalf, fId));
+ continue; // because the node is unknown.
+ }
+
+ // Get the node path
+ next.GetPath(path);
+ align = Form(HALF_FORMAT, fId, thisHalf);
+ }
+ // if the detector was found, then we're on that branch, and we
+ // check if this node represents a module in that branch.
+ if (thisNodeFound && thisHalf && IS_NODE_SENSOR(name)) {
+ AliFMDDebug(30, ("Found sensor node '%s' for FMD%d", name, fId));
+ // Get the ring Id.
+ Char_t ringid = name[1];
+
+ // check that the ring is valid
+ if (!GetRing(ringid)) {
+ AliWarning(Form("Invalid ring %c for FMD%d", ringid, fId));
+ continue;
+ }
+
+ // Check if we're done
+ Bool_t done = false;
+ switch (ringid) {
+ case 'I': done = iInnerSensor >= nInnerSensor; break;
+ case 'O': done = iOuterSensor >= nOuterSensor; break;
+ default: continue;
+ }
+ if (done) {
+ AliFMDDebug(20, ("Already has all sensor volumes for ring %c",ringid));
+ continue;
+ }
+ // Get the copy (module) number, and check that it hasn't
+ // already been added to the container.
+ Int_t copy = node->GetNumber();
+ next.GetPath(path);
+ // path.Replace("ALIC", "/ALIC_1");
+ align = Form(SENSOR_FORMAT, fId, thisHalf, ringid, copy);
+
+ switch (ringid) {
+ case 'I': iInnerSensor++; break;
+ case 'O': iOuterSensor++; break;
+ }
+ }
+ if (!align.IsNull() && !path.IsNull()) {
+ AliFMDDebug(20, ("Got %s -> %s", path.Data(), align.Data()));
+ TGeoPNEntry* entry =
+ gGeoManager->SetAlignableEntry(align.Data(),path.Data());
+ if(!entry)
+ AliFatal(Form("Alignable entry %s not created. "
+ "Volume path %s not valid",
+ align.Data(),path.Data()));
+#ifdef MAKE_ALIGNABLE_PHYSICAL
+ TGeoPhysicalNode* phys = gGeoManager->MakeAlignablePN(entry);
+ if (!phys)
+ AliWarning(Form("Physical node entry %s not created. "
+ "Volume path %s not valid",
+ align.Data(),path.Data()));
+#endif
+ align = "";
+ }
+ AliFMDDebug(20, ("FMD%d: top: %d bottom: %d Inner: %d/%d Outer %d/%d",
+ fId, hasTop, hasBottom, iInnerSensor, nInnerSensor,
+ iOuterSensor, nOuterSensor));
+ }
}
+
+
//____________________________________________________________________
AliFMDRing*
AliFMDDetector::GetRing(Char_t id) const
{
+ // Get the specified ring
+ //
+ // ID Id of ring ('I' or 'O')
+ //
switch (id) {
case 'i':
case 'I': return GetInner();
Double_t
AliFMDDetector::GetRingZ(Char_t id) const
{
+ // Get the z-coordinate specified ring
+ //
+ // ID Id of ring ('I' or 'O')
+ //
switch (id) {
case 'i':
case 'I': return GetInnerZ();
}
return 0;
}
+
+//____________________________________________________________________
+TGeoMatrix*
+AliFMDDetector::FindTransform(Char_t ring, UShort_t sector) const
+{
+ // Find the transformation that corresponds to sector sector in ring
+ // ring.
+ TObjArray* matricies = 0;
+ switch (ring) {
+ case 'i': case 'I': matricies = fInnerTransforms; break;
+ case 'o': case 'O': matricies = fOuterTransforms; break;
+ }
+ if (!matricies) {
+ AliWarning(Form("Unknown ring %c of FMD%d", ring, fId));
+ return 0;
+ }
+ UInt_t module = sector / 2;
+ TGeoMatrix* m = static_cast<TGeoMatrix*>(matricies->At(module));
+ if (!m) {
+ AliWarning(Form("No matrix found for sector %d in FMD%d%c",
+ sector, fId, ring));
+ return 0;
+ }
+ return m;
+}
+
+
//____________________________________________________________________
void
-AliFMDDetector::Detector2XYZ(Char_t ring,
+AliFMDDetector::Detector2XYZ(Char_t ring,
UShort_t sector,
UShort_t strip,
Double_t& x,
Double_t& y,
Double_t& z) const
{
+ // Translate detector coordinates (this,ring,sector,strip) into
+ // (x,y,z) coordinates (in global reference frame)
AliFMDRing* r = GetRing(ring);
- if (!r) return;
- z = GetRingZ(ring);
- r->Detector2XYZ(sector, strip, x, y, z);
+ if (!r) {
+ AliWarning(Form("No such ring FMD%d%c ", fId, ring));
+ return;
+ }
+ TGeoMatrix* m = FindTransform(ring, sector);
+ if (!m) {
+ AliWarning(Form("No transfrmation found for FMD%d%c[%02d]",
+ fId, ring, sector));
+ return;
+ }
+ Double_t rho = r->GetStripRadius(strip);
+ Double_t phi = ((sector % 2) - .5) * r->GetTheta();
+ Double_t siThick = r->GetSiThickness();
+#if 0
+ Double_t modThick = (siThick
+ + r->GetPrintboardThickness()
+ + r->GetCopperThickness()
+ + r->GetChipThickness()
+ + r->GetSpacing());
+#endif
+ AliFMDDebug(30, ("Rho %7.3f, angle %7.3f", rho, phi));
+ Double_t local[] = { rho * TMath::Cos(phi * TMath::DegToRad()),
+ rho * TMath::Sin(phi * TMath::DegToRad()),
+ /* -modThick + */ siThick / 2 };
+ Double_t master[3];
+ AliFMDDebug(30, ("Local (%7.3f,%7.3f,%7.3f)",local[0], local[1], local[2]));
+ m->LocalToMaster(local, master);
+ AliFMDDebug(30, ("Master (%7.3f,%7.3f,%7.3f)",
+ master[0],master[1],master[2]));
+ x = master[0];
+ y = master[1];
+ z = master[2];
}
//____________________________________________________________________
UShort_t& sector,
UShort_t& strip) const
{
+ // Translate (x,y,z) coordinates (in global reference frame) into
+ // detector coordinates (this,ring,sector,strip).
AliFMDRing* rng = 0;
ring = -1;
for (int j = 0; j < 2; j++) {
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