httpgeom.C File Reference

Detailed Description

This program creates trivial geometry with several tracks and configure online monitoring of geometry via THttpServer Geometry regularly changed by the program and correspondent changes immediately seen in the browser.

 
#include "THttpServer.h"
#include "TGeoManager.h"
#include "TGeoMaterial.h"
#include "TGeoMedium.h"
#include "TGeoVolume.h"
#include "TGeoTrack.h"
#include "TRandom.h"
#include "TTimer.h"
#include "TPad.h"
 
THttpServer *serv = nullptr;
bool drawing = false;
int interval = 2000;
 
void create_geo()
{
   if (gGeoManager) {
      serv->Unregister(gGeoManager);
      delete gGeoManager;
   }
 
   new TGeoManager("world", "the simplest geometry");
 
   if (serv) {
      serv->Register("/", gGeoManager);
      // enable monitoring and
      // specify item to draw when page is opened
      // serv->SetItemField("/","_layout","grid2x2");
      serv->SetItemField("/","_monitoring",Form("%d",interval));
      serv->SetItemField("/","_drawitem","world");
      serv->SetItemField("/","_drawopt","tracks");
   }
 
   auto rnd = gRandom;
 
   TGeoMaterial *mat = new TGeoMaterial("Vacuum",0,0,0);
   mat->SetTransparency(50);
   TGeoMedium   *med = new TGeoMedium("Vacuum",1,mat);
 
   TGeoVolume *top = gGeoManager->MakeBox("Top",med, 10+5*rnd->Rndm(), 10+5*rnd->Rndm(), 10+5*rnd->Rndm());
   gGeoManager->SetTopVolume(top);
   top->SetFillColor(3);
 
   TGeoVolume *in = gGeoManager->MakeBox("In",med, 2.,2.,2.);
   in->SetFillColor(2);
   TGeoCombiTrans *tr = new TGeoCombiTrans("tr");
   double x = -8+16*rnd->Rndm();
   double y = -8+16*rnd->Rndm();
   double z = -8+16*rnd->Rndm();
   tr->SetTranslation (x, y, z);
   tr->RegisterYourself();
   top->AddNode(in, 1, tr);
 
   gGeoManager->CloseGeometry();
 
   top->SetLineColor(kMagenta);
   if (rnd->Rndm() < 0.5)
      in->SetLineColor(kGreen);
   else
      in->SetLineColor(kBlack);
 
   for (int j=0; j<50; j++)
   {
       Int_t track_index = gGeoManager->AddTrack(2,22);
       auto track = gGeoManager->GetTrack(track_index);
       if (rnd->Rndm() < 0.5)
           track->SetLineColor(kRed);
       else
           track->SetLineColor(kBlue);
       track->SetLineWidth(2);
 
       track->AddPoint(x, y, z, 0);
       track->AddPoint(-10 + 20*rnd->Rndm(), -10 + 20*rnd->Rndm(), -10 + 20*rnd->Rndm(), 0);
   }
 
   if (drawing) {
      // add "showtop" option to display top volume in JSROOT
      // gGeoManager->SetTopVisible();
 
      top->Draw();
      gGeoManager->DrawTracks();
      gPad->Modified();
      gPad->Update();
   }
}
 
 
void httpgeom()
{
   drawing = false; // to enable canvas drawing
 
   serv = new THttpServer("http:8090");
 
   TTimer *timer = new TTimer("create_geo()", interval);
   timer->TurnOn();
}

Author

Sergey Linev

Definition in file httpgeom.C.