Double_t pi;
Float_t theta = 0;
Float_t phi = 30;
void shapesAnim()
{
   TCanvas *c1 = new TCanvas("c1", "Geometry Shapes", 10, 10, 500, 500);

   //  Define some volumes
   TBRIK *brik = new TBRIK("BRIK", "BRIK", "void", 200, 150, 150);
   TTRD1 *trd1 = new TTRD1("TRD1", "TRD1", "void", 200, 50, 100, 100);
   TTRD2 *trd2 = new TTRD2("TRD2", "TRD2", "void", 200, 50, 200, 50, 100);
   TTRAP *trap = new TTRAP("TRAP", "TRAP", "void", 190, 0, 0, 60, 40, 90, 15, 120, 80, 180, 15);
   TPARA *para = new TPARA("PARA", "PARA", "void", 100, 200, 200, 15, 30, 30);
   TGTRA *gtra = new TGTRA("GTRA", "GTRA", "void", 390, 0, 0, 20, 60, 40, 90, 15, 120, 80, 180, 15);
   TTUBE *tube = new TTUBE("TUBE", "TUBE", "void", 150, 200, 400);
   TTUBS *tubs = new TTUBS("TUBS", "TUBS", "void", 80, 100, 100, 90, 235);
   TCONE *cone = new TCONE("CONE", "CONE", "void", 100, 50, 70, 120, 150);
   TCONS *cons = new TCONS("CONS", "CONS", "void", 50, 100, 100, 200, 300, 90, 270);
   TSPHE *sphe = new TSPHE("SPHE", "SPHE", "void", 25, 340, 45, 135, 0, 270);
   TSPHE *sphe1 = new TSPHE("SPHE1", "SPHE1", "void", 0, 140, 0, 180, 0, 360);
   TSPHE *sphe2 = new TSPHE("SPHE2", "SPHE2", "void", 0, 200, 10, 120, 45, 145);

   TPCON *pcon = new TPCON("PCON", "PCON", "void", 180, 270, 4);
   pcon->DefineSection(0, -200, 50, 100);
   pcon->DefineSection(1, -50, 50, 80);
   pcon->DefineSection(2, 50, 50, 80);
   pcon->DefineSection(3, 200, 50, 100);

   TPGON *pgon = new TPGON("PGON", "PGON", "void", 180, 270, 8, 4);
   pgon->DefineSection(0, -200, 50, 100);
   pgon->DefineSection(1, -50, 50, 80);
   pgon->DefineSection(2, 50, 50, 80);
   pgon->DefineSection(3, 200, 50, 100);

   //  Set shapes attributes
   brik->SetLineColor(1);
   trd1->SetLineColor(2);
   trd2->SetLineColor(3);
   trap->SetLineColor(4);
   para->SetLineColor(5);
   gtra->SetLineColor(7);
   tube->SetLineColor(6);
   tubs->SetLineColor(7);
   cone->SetLineColor(2);
   cons->SetLineColor(3);
   pcon->SetLineColor(6);
   pgon->SetLineColor(2);
   sphe->SetLineColor(kRed);
   sphe1->SetLineColor(kBlack);
   sphe2->SetLineColor(kBlue);

   //  Build the geometry hierarchy
   TNode *node1 = new TNode("NODE1", "NODE1", "BRIK");
   node1->cd();

   TNode *node2 = new TNode("NODE2", "NODE2", "TRD1", 0, 0, -1000);
   TNode *node3 = new TNode("NODE3", "NODE3", "TRD2", 0, 0, 1000);
   TNode *node4 = new TNode("NODE4", "NODE4", "TRAP", 0, -1000, 0);
   TNode *node5 = new TNode("NODE5", "NODE5", "PARA", 0, 1000, 0);
   TNode *node6 = new TNode("NODE6", "NODE6", "TUBE", -1000, 0, 0);
   TNode *node7 = new TNode("NODE7", "NODE7", "TUBS", 1000, 0, 0);
   TNode *node8 = new TNode("NODE8", "NODE8", "CONE", -300, -300, 0);
   TNode *node9 = new TNode("NODE9", "NODE9", "CONS", 300, 300, 0);
   TNode *node10 = new TNode("NODE10", "NODE10", "PCON", 0, -1000, -1000);
   TNode *node11 = new TNode("NODE11", "NODE11", "PGON", 0, 1000, 1000);
   TNode *node12 = new TNode("NODE12", "NODE12", "GTRA", 0, -400, 700);
   TNode *node13 = new TNode("NODE13", "NODE13", "SPHE", 10, -400, 500);
   TNode *node14 = new TNode("NODE14", "NODE14", "SPHE1", 10, 250, 300);
   TNode *node15 = new TNode("NODE15", "NODE15", "SPHE2", 10, -100, -200);

   // Draw this geometry in the current canvas
   node1->cd();
   node1->Draw();
   c1->Update();

   // start a Timer
   TTimer *timer = new TTimer(20);
   timer->SetCommand("Animate()");
   timer->TurnOn();
}
void Animate()
{
   theta += 2;
   phi += 2;
   if (gPad->GetView())
      gPad->GetView()->RotateView(theta, phi);
   gPad->Modified();
   gPad->Update();
}