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Deduplicate MFT capacitor/welding and X7R0402 geometry #15723

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Deduplicate MFT capacitor/welding and X7R0402 geometry #15723

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30 changes: 23 additions & 7 deletions Detectors/ITSMFT/MFT/base/src/Flex.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -235,17 +235,33 @@ TGeoVolumeAssembly* Flex::makeElectricComponent(Double_t dx, Double_t dy, Double
Int_t idHalfDisk = mftGeom->getDiskID(mLadderSeg->GetUniqueID());
Int_t idLadder = mftGeom->getLadderID(mLadderSeg->GetUniqueID());
//------------------------------------------------------
// X7R0402 (and its capacitor/welding0/welding1 children) is geometrically identical at
// every call site (dx,dy,dz are always Geometry::sCapacitorDy/Dx/Dz) — build the whole
// assembly once, place it many times.
static TGeoVolumeAssembly* X7R0402 = nullptr;
static Double_t sCachedDx = 0., sCachedDy = 0., sCachedDz = 0.;
if (X7R0402) {
if (dx != sCachedDx || dy != sCachedDy || dz != sCachedDz) {
LOG(fatal) << "Flex::makeElectricComponent: cached X7R0402 assembly was built with "
"different dx,dy,dz than this call - the single-assembly cache assumes "
"identical dimensions at every call site";
}
return X7R0402;
}
sCachedDx = dx;
sCachedDy = dy;
sCachedDz = dz;

TGeoMedium* kmedX7R = gGeoManager->GetMedium("MFT_X7Rcapacitors$");
TGeoMedium* kmedX7Rw = gGeoManager->GetMedium("MFT_X7Rweld$");

auto* X7R0402 = new TGeoVolumeAssembly(Form("X7R_%d_%d_%d_%d", idHalfMFT, idHalfDisk, idLadder, id));

auto* capacit = new TGeoBBox("capacitor", dx / 2, dy / 2, dz / 2);
auto* weld = new TGeoBBox("weld", (dx / 4) / 2, dy / 2, (dz / 2) / 2);
auto* capacitor =
new TGeoVolume(Form("capacitor_%d_%d_%d_%d", idHalfMFT, idHalfDisk, idLadder, id), capacit, kmedX7R);
auto* welding0 = new TGeoVolume(Form("welding0_%d_%d_%d_%d", idHalfMFT, idHalfDisk, idLadder, id), weld, kmedX7Rw);
auto* welding1 = new TGeoVolume(Form("welding1_%d_%d_%d_%d", idHalfMFT, idHalfDisk, idLadder, id), weld, kmedX7Rw);

auto* capacitor = new TGeoVolume("capacitor", capacit, kmedX7R);
auto* welding0 = new TGeoVolume("welding0", weld, kmedX7Rw);
auto* welding1 = new TGeoVolume("welding1", weld, kmedX7Rw);

capacitor->SetVisibility(kTRUE);
capacitor->SetLineColor(kRed);
capacitor->SetLineWidth(1);
Expand All @@ -264,10 +280,10 @@ TGeoVolumeAssembly* Flex::makeElectricComponent(Double_t dx, Double_t dy, Double
welding1->SetFillColor(welding1->GetLineColor());
welding1->SetFillStyle(4000); // 0% transparent

X7R0402 = new TGeoVolumeAssembly("X7R0402");
X7R0402->AddNode(capacitor, 1, new TGeoTranslation(0., 0., 0.));
X7R0402->AddNode(welding0, 1, new TGeoTranslation(dx / 2 + (dx / 4) / 2, 0., (dz / 2) / 2));
X7R0402->AddNode(welding1, 1, new TGeoTranslation(-dx / 2 - (dx / 4) / 2, 0., (dz / 2) / 2));

X7R0402->SetVisibility(kTRUE);

return X7R0402;
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