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 draw_geometry = false;
bool set_time_interval = 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();
 
   if (set_time_interval)
      gGeoManager->SetTminTmax(10, 30); // draw only part of tracks
 
   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);
      double x1 = -10 + 20*rnd->Rndm();
      double y1 = -10 + 20*rnd->Rndm();
      double z1 = -10 + 20*rnd->Rndm();
      if (set_time_interval) {
         for (int np = 1; np < 40; np++)
            track->AddPoint(x + (x1-x)/40.*np, y + (y1-y)/40.*np, z + (z1-z)/40*np, np);
 
         // make endmarker visible
         track->SetMarkerColor(kGreen);
         track->SetMarkerSize(1);
         track->SetMarkerStyle(8);
      } else {
         track->AddPoint(x1, y1, z1, 0);
      }
   }
 
   if (draw_geometry) {
      // add "showtop" option to display top volume in JSROOT
      // gGeoManager->SetTopVisible();
 
      top->Draw();
      gGeoManager->DrawTracks();
      gPad->Modified();
      gPad->Update();
   }
}
 
 
void httpgeom(bool draw = false, bool tm = false)
{
   draw_geometry = draw;
   set_time_interval = tm;
 
   serv = new THttpServer("http:8090");
 
   TTimer *timer = new TTimer("create_geo()", interval);
   timer->TurnOn();
}

Author

Sergey Linev

Definition in file httpgeom.C.