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// A program to create a very simple (double nested) assembly
#include "TGeoVolume.h"
#include "TGeoTube.h"
#include "TGeoMatrix.h"
#include "TGeoManager.h"
#ifdef NDEBUG
#undef NDEBUG
#endif
#include <cassert>
#include <iostream>
// global constants defining the arrangement
int gNumberOfModulesPerRow = 4;
int gNumberOfTubesPerRow = 4;
TGeoVolumeAssembly *MakeElementaryAssembly(int tubesperrow, double Lx, double Lz)
{
// Lx is half length of "virtual" assembly box
double tuberadius = Lx / tubesperrow;
double tubehalflength = 0.99 * Lz;
TGeoVolumeAssembly *ass = new TGeoVolumeAssembly("INNERASS");
TGeoTube *t = new TGeoTube(0., tuberadius, tubehalflength);
TGeoVolume *v = new TGeoVolume("WIRE", t);
size_t counter = 0;
for (size_t x = 0; x < (size_t)tubesperrow; ++x) {
double cx = -Lx + tuberadius + x * (2 * tuberadius);
for (size_t y = 0; y < (size_t)tubesperrow; ++y) {
double cy = -Lx + tuberadius + y * (2 * tuberadius);
ass->AddNode(v, counter, new TGeoTranslation(cx, cy, 0));
counter++;
}
}
return ass;
}
TGeoVolume *MakeTopAssembly(int modulesperrow, double worldL)
{
if (modulesperrow < 1) return nullptr;
double Delta = worldL / (modulesperrow * 10.); // small space between modules
double BoxL = (worldL * 2 - (modulesperrow + 1) * Delta) / (2. * modulesperrow);
TGeoVolumeAssembly *ass = new TGeoVolumeAssembly("OUTERASS");
TGeoVolumeAssembly *elementary = MakeElementaryAssembly(gNumberOfTubesPerRow, BoxL, worldL);
size_t counter = 0;
double cx(0.);
double cy(0.);
for (size_t x = 0; x < (size_t)modulesperrow; ++x) {
cx = -worldL + (Delta + BoxL) + x * (2 * BoxL + Delta);
for (size_t y = 0; y < (size_t)modulesperrow; ++y) {
cy = -worldL + (Delta + BoxL) + y * (2 * BoxL + Delta);
ass->AddNode(elementary, counter, new TGeoTranslation(cx, cy, 0));
counter++;
}
}
assert(std::abs(cx + BoxL + Delta - worldL) < 1E-6);
assert(std::abs(cy + BoxL + Delta - worldL) < 1E-6);
return ass;
}
// check a couple of simple things
__attribute__((noinline)) void test1(TGeoVolume *v)
{
double testpoint[3] = {0, 0, 0};
std::cerr << v->Contains(testpoint) << "\n";
}
// check a couple of simple things
__attribute__((noinline)) void test2()
{
double testpoint[3] = {0, 0, 0};
gGeoManager->FindNode(testpoint[0], testpoint[1], testpoint[2]);
std::cerr << gGeoManager->GetPath() << "\n";
double testpoint2[3] = {-30, -30, 0};
gGeoManager->FindNode(testpoint2[0], testpoint2[1], testpoint2[2]);
std::cerr << gGeoManager->GetPath() << "\n";
}
int main(int argc, char *argv[])
{
if (argc >= 3) {
gNumberOfModulesPerRow = atoi(argv[1]);
gNumberOfTubesPerRow = atoi(argv[2]);
}
std::cout << "CREATING ASSEMBLY " << gNumberOfModulesPerRow << " x " << gNumberOfTubesPerRow << "\n";
double worldL = 100.;
auto *topAssembly = MakeTopAssembly(gNumberOfModulesPerRow, worldL);
TGeoVolume *top = gGeoManager->MakeBox("TOP", nullptr, worldL, worldL, worldL);
top->AddNode(topAssembly, 0, new TGeoIdentity());
gGeoManager->SetTopVolume(top);
gGeoManager->CloseGeometry();
gGeoManager->Export("assemblytest.root");
// this crashes unfortunately
// gGeoManager->Export("assemblytest.gdml");
// test1(topAssembly);
// test1(gGeoManager->FindVolumeFast("INNERASS"));
test2();
return 0;
}
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