Logo ROOT  
Reference Guide
 
Loading...
Searching...
No Matches
csgdemo.C File Reference

Detailed Description

Combinatorial Solid Geometry example.

Stripped down to demonstrate EVE shape-extracts.

  1. Run root csgdemo.C This will produce csg.root containing the extract.
  2. Display the assebly as: root show_extract.C("csg.root")
Bool_t raytracing = kTRUE;
#include "TGeoManager.h"
//______________________________________________________________________________
void csgdemo ()
{
gSystem->Load("libGeom");
TControlBar* bar = new TControlBar("vertical", "TGeo composite shapes",20,20);
bar->AddButton("How to run ","help()","Instructions ");
bar->AddButton("Union ", "s_union()", "A + B ");
bar->AddButton("Intersection ", "s_intersection()","A * B ");
bar->AddButton("Difference ", "s_difference()","A - B ");
//These two buttons are disabled cause of bugs
bar->AddButton("Complex composite", "complex_1()","(A * B) + (C - D)");
bar->Show();
gROOT->SaveContext();
}
//______________________________________________________________________________
void MakePicture()
{
gPad->Modified();
gPad->Update();
}
void s_union()
{
gROOT->GetListOfCanvases()->Delete();
TCanvas *c = new TCanvas("composite shape", "Union boolean operation", 700, 1000);
c->Divide(1,2,0,0);
c->cd(2);
gPad->SetPad(0,0,1,0.4);
c->cd(1);
gPad->SetPad(0,0.4,1,1);
if (gGeoManager) delete gGeoManager;
new TGeoManager("xtru", "poza12");
TGeoMaterial *mat = new TGeoMaterial("Al", 26.98,13,2.7);
TGeoMedium *med = new TGeoMedium("MED",1,mat);
TGeoVolume *top = gGeoManager->MakeBox("TOP",med,100,100,100);
// define shape components with names
TGeoPgon *pgon = new TGeoPgon("pg",0.,360.,6,2);
pgon->DefineSection(0,0,0,20);
pgon->DefineSection(1, 30,0,20);
TGeoSphere *sph = new TGeoSphere("sph", 40., 45., 5., 175., 0., 340.);
// define named geometrical transformations with names
TGeoTranslation *tr = new TGeoTranslation(0., 0., 45.);
tr->SetName("tr");
// register all used transformations
// create the composite shape based on a Boolean expression
TGeoCompositeShape *cs = new TGeoCompositeShape("mir", "sph:tr + pg");
TGeoVolume *vol = new TGeoVolume("COMP1",cs);
top->AddNode(vol,1);
top->Draw();
MakePicture();
c->cd(2);
TPaveText *pt = new TPaveText(0.01,0.01,0.99,0.99);
TText *text = pt->AddText("TGeoCompositeShape - composite shape class");
pt->AddText("----- It's an example of boolean union operation : A + B");
pt->AddText("----- A == part of sphere (5-175, 0-340), B == pgon");
pt->AddText(" ");
pt->SetAllWith("-----","color",4);
pt->SetAllWith("-----","font",72);
pt->SetAllWith("-----","size",0.04);
pt->SetTextSize(.044);
pt->Draw();
c->cd(1);
}
void s_intersection()
{
gROOT->GetListOfCanvases()->Delete();
TCanvas *c = new TCanvas("composite shape", "Intersection boolean operation", 700, 1000);
c->Divide(1,2,0,0);
c->cd(2);
gPad->SetPad(0,0,1,0.4);
c->cd(1);
gPad->SetPad(0,0.4,1,1);
if (gGeoManager) delete gGeoManager;
new TGeoManager("xtru", "poza12");
TGeoMaterial *mat = new TGeoMaterial("Al", 26.98,13,2.7);
TGeoMedium *med = new TGeoMedium("MED",1,mat);
TGeoVolume *top = gGeoManager->MakeBox("TOP",med,100,100,100);
// define shape components with names
TGeoBBox *box = new TGeoBBox("bx", 40., 40., 40.);
TGeoSphere *sph = new TGeoSphere("sph", 40., 45.);
// define named geometrical transformations with names
TGeoTranslation *tr = new TGeoTranslation(0., 0., 45.);
tr->SetName("tr");
// register all used transformations
// create the composite shape based on a Boolean expression
TGeoCompositeShape *cs = new TGeoCompositeShape("mir", "sph:tr * bx");
TGeoVolume *vol = new TGeoVolume("COMP2",cs);
top->AddNode(vol,1);
top->Draw();
MakePicture();
c->cd(2);
TPaveText *pt = new TPaveText(0.01,0.01,0.99,0.99);
TText *text = pt->AddText("TGeoCompositeShape - composite shape class");
pt->AddText("----- Here is an example of boolean intersection operation : A * B");
pt->AddText("----- A == sphere (with inner radius non-zero), B == box");
pt->AddText(" ");
pt->SetAllWith("-----","color",4);
pt->SetAllWith("-----","font",72);
pt->SetAllWith("-----","size",0.04);
pt->SetTextSize(0.044);
pt->Draw();
c->cd(1);
}
void s_difference()
{
gROOT->GetListOfCanvases()->Delete();
TCanvas *c = new TCanvas("composite shape", "Difference boolean operation", 700, 1000);
c->Divide(1,2,0,0);
c->cd(2);
gPad->SetPad(0,0,1,0.4);
c->cd(1);
gPad->SetPad(0,0.4,1,1);
if (gGeoManager) delete gGeoManager;
new TGeoManager("xtru", "poza12");
TGeoMaterial *mat = new TGeoMaterial("Al", 26.98,13,2.7);
TGeoMedium *med = new TGeoMedium("MED",1,mat);
TGeoVolume *top = gGeoManager->MakeBox("TOP",med,100,100,100);
// define shape components with names
TGeoTorus *tor = new TGeoTorus("tor", 45., 15., 20., 45., 145.);
TGeoSphere *sph = new TGeoSphere("sph", 20., 45., 0., 180., 0., 270.);
// create the composite shape based on a Boolean expression
TGeoCompositeShape *cs = new TGeoCompositeShape("mir", "sph - tor");
TGeoVolume *vol = new TGeoVolume("COMP3",cs);
top->AddNode(vol,1);
top->Draw();
MakePicture();
c->cd(2);
TPaveText *pt = new TPaveText(.01, .01, .99, .99);
TText *text = pt->AddText("TGeoCompositeShape - composite shape class");
pt->AddText("----- It's an example of boolean difference: A - B");
pt->AddText("----- A == part of sphere (0-180, 0-270), B == partial torus (45-145)");
pt->AddText(" ");
pt->SetAllWith("-----","color",4);
pt->SetAllWith("-----","font",72);
pt->SetAllWith("-----","size",0.04);
pt->SetTextSize(0.044);
pt->Draw();
c->cd(1);
}
void complex_1()
{
gROOT->GetListOfCanvases()->Delete();
TCanvas *c = new TCanvas("composite shape", "A * B - C", 700, 1000);
c->Divide(1,2,0,0);
c->cd(2);
gPad->SetPad(0,0,1,0.4);
c->cd(1);
gPad->SetPad(0,0.4,1,1);
if (gGeoManager) delete gGeoManager;
new TGeoManager("xtru", "poza12");
TGeoMaterial *mat = new TGeoMaterial("Al", 26.98,13,2.7);
TGeoMedium *med = new TGeoMedium("MED",1,mat);
TGeoVolume *top = gGeoManager->MakeBox("TOP",med,100,100,100);
// define shape components with names
TGeoBBox *box = new TGeoBBox("box", 20., 20., 20.);
TGeoBBox *box1 = new TGeoBBox("box1", 5., 5., 5.);
TGeoSphere *sph = new TGeoSphere("sph", 5., 25.);
TGeoSphere *sph1 = new TGeoSphere("sph1", 1., 15.);
// create the composite shape based on a Boolean expression
TGeoTranslation *tr = new TGeoTranslation(0., 30., 0.);
TGeoTranslation *tr1 = new TGeoTranslation(0., 40., 0.);
TGeoTranslation *tr2 = new TGeoTranslation(0., 30., 0.);
TGeoTranslation *tr3 = new TGeoTranslation(0., 30., 0.);
tr->SetName("tr");
tr1->SetName("tr1");
tr2->SetName("tr2");
tr3->SetName("tr3");
// register all used transformations
TGeoCompositeShape *cs = new TGeoCompositeShape("mir", "(sph * box) + (sph1:tr - box1:tr1)");
TGeoVolume *vol = new TGeoVolume("COMP4",cs);
// vol->SetLineColor(randomColor());
top->AddNode(vol,1);
top->Draw();
MakePicture();
c->cd(2);
TPaveText *pt = new TPaveText(0.01,0.01,0.99,0.99);
TText *text = pt->AddText("TGeoCompositeShape - composite shape class");
pt->AddText("----- (sphere * box) + (sphere - box) ");
pt->AddText(" ");
pt->SetAllWith("-----","color",4);
pt->SetAllWith("-----","font",72);
pt->SetAllWith("-----","size",0.04);
pt->SetTextSize(0.044);
pt->Draw();
c->cd(1);
}
//______________________________________________________________________________
void AddText(TPaveText *pave, const char *datamember, Double_t value, const char *comment)
{
char line[128];
for (Int_t i=0; i<128; i++) line[i] = ' ';
memcpy(&line[0], datamember, strlen(datamember));
line[10] = '=';
char number[20];
sprintf(number, "%5.2f", value);
memcpy(&line[12], number, strlen(number));
line[26] = '=';
line[27] = '>';
sprintf(&line[30], "%s",comment);
TText *text = pave->AddText(line);
}
//______________________________________________________________________________
void AddText(TPaveText *pave, const char *datamember, Int_t value, const char *comment)
{
char line[128];
for (Int_t i=0; i<128; i++) line[i] = ' ';
memcpy(&line[0], datamember, strlen(datamember));
line[10] = '=';
char number[20];
sprintf(number, "%5i", value);
memcpy(&line[12], number, strlen(number));
line[26] = '=';
line[27] = '>';
sprintf(&line[30], "%s",comment);
TText *text = pave->AddText(line);
}
//______________________________________________________________________________
void AddText(TPaveText *pave, TObject *pf, Int_t iaxis)
{
char line[128];
if (!pave || !pf) return;
for (Int_t i=0; i<128; i++) line[i] = ' ';
TGeoVolume *volume = finder->GetVolume();
TGeoShape *sh = volume->GetShape();
sprintf(line, "Division of %s on axis %d (%s)", volume->GetName(), iaxis,sh->GetAxisName(iaxis));
TText *text = pave->AddText(line);
AddText(pave, "fNdiv",finder->GetNdiv(),"number of divisions");
AddText(pave, "fStart",finder->GetStart(),"start divisioning position");
AddText(pave, "fStep",finder->GetStep(),"division step");
}
//______________________________________________________________________________
void raytrace() {
if (!gGeoManager) return;
if (!painter) return;
painter->SetRaytracing(raytracing);
if (!gPad) return;
gPad->Modified();
gPad->Update();
}
//______________________________________________________________________________
void help() {
//
new TCanvas("chelp","Help to run demos",200,10,700,600);
TPaveText* welcome = new TPaveText(.1,.8,.9,.97);
welcome->AddText("Welcome to the new geometry package");
welcome->SetTextFont(32);
welcome->SetTextColor(4);
welcome->SetFillColor(24);
welcome->Draw();
TPaveText* hdemo = new TPaveText(.05,.05,.95,.7);
hdemo->SetTextAlign(12);
hdemo->SetTextFont(52);
hdemo->AddText("- Demo for building TGeo composite shapes");
hdemo->AddText(" ");
hdemo->SetAllWith("....","color",2);
hdemo->SetAllWith("....","font",72);
hdemo->SetAllWith("....","size",0.03);
hdemo->Draw();
}
#define c(i)
Definition RSha256.hxx:101
int Int_t
Definition RtypesCore.h:45
const Bool_t kFALSE
Definition RtypesCore.h:92
bool Bool_t
Definition RtypesCore.h:63
double Double_t
Definition RtypesCore.h:59
const Bool_t kTRUE
Definition RtypesCore.h:91
R__EXTERN TGeoManager * gGeoManager
#define gROOT
Definition TROOT.h:406
R__EXTERN TSystem * gSystem
Definition TSystem.h:559
#define gPad
virtual void SetFillColor(Color_t fcolor)
Set the fill area color.
Definition TAttFill.h:37
virtual void SetLineColor(Color_t lcolor)
Set the line color.
Definition TAttLine.h:40
virtual void SetTextAlign(Short_t align=11)
Set the text alignment.
Definition TAttText.h:41
virtual void SetTextColor(Color_t tcolor=1)
Set the text color.
Definition TAttText.h:43
virtual void SetTextFont(Font_t tfont=62)
Set the text font.
Definition TAttText.h:45
virtual void SetTextSize(Float_t tsize=1)
Set the text size.
Definition TAttText.h:46
The Canvas class.
Definition TCanvas.h:23
A Control Bar is a fully user configurable tool which provides fast access to frequently used operati...
Definition TControlBar.h:26
void Show()
Show control bar.
void AddButton(TControlBarButton *button)
Add button.
Box class.
Definition TGeoBBox.h:18
Class handling Boolean composition of shapes.
The manager class for any TGeo geometry.
Definition TGeoManager.h:45
TVirtualGeoPainter * GetGeomPainter()
Make a default painter if none present. Returns pointer to it.
void CloseGeometry(Option_t *option="d")
Closing geometry implies checking the geometry validity, fixing shapes with negative parameters (run-...
TGeoVolume * MakeBox(const char *name, TGeoMedium *medium, Double_t dx, Double_t dy, Double_t dz)
Make in one step a volume pointing to a box shape with given medium.
void SetTopVolume(TGeoVolume *vol)
Set the top volume and corresponding node as starting point of the geometry.
void SetNsegments(Int_t nseg)
Set number of segments for approximating circles in drawing.
Base class describing materials.
virtual void RegisterYourself()
Register the matrix in the current manager, which will become the owner.
Media are used to store properties related to tracking and which are useful only when using geometry ...
Definition TGeoMedium.h:24
Base finder class for patterns.
Int_t GetNdiv() const
TGeoVolume * GetVolume() const
Double_t GetStep() const
Double_t GetStart() const
virtual void DefineSection(Int_t snum, Double_t z, Double_t rmin, Double_t rmax)
Defines z position of a section plane, rmin and rmax at this z.
Definition TGeoPcon.cxx:571
A polygone.
Definition TGeoPgon.h:21
Base abstract class for all shapes.
Definition TGeoShape.h:26
virtual const char * GetAxisName(Int_t iaxis) const =0
Spherical shell class.
Definition TGeoSphere.h:18
Torus segment class.
Definition TGeoTorus.h:18
Class describing translations.
Definition TGeoMatrix.h:122
TGeoVolume, TGeoVolumeMulti, TGeoVolumeAssembly are the volume classes.
Definition TGeoVolume.h:49
virtual TGeoNode * AddNode(TGeoVolume *vol, Int_t copy_no, TGeoMatrix *mat=0, Option_t *option="")
Add a TGeoNode to the list of nodes.
TGeoShape * GetShape() const
Definition TGeoVolume.h:189
virtual void Draw(Option_t *option="")
draw top volume according to option
virtual void SetName(const char *name)
Set the name of the TNamed.
Definition TNamed.cxx:140
virtual const char * GetName() const
Returns name of object.
Definition TNamed.h:47
Mother of all ROOT objects.
Definition TObject.h:37
A Pave (see TPave) with text, lines or/and boxes inside.
Definition TPaveText.h:21
virtual TText * AddText(Double_t x1, Double_t y1, const char *label)
Add a new Text line to this pavetext at given coordinates.
virtual void Draw(Option_t *option="")
Draw this pavetext with its current attributes.
virtual void SetAllWith(const char *text, Option_t *option, Double_t value)
Set attribute option for all lines containing string text.
virtual int Load(const char *module, const char *entry="", Bool_t system=kFALSE)
Load a shared library.
Definition TSystem.cxx:1853
Base class for several text objects.
Definition TText.h:22
Abstract class for geometry painters.
virtual void SetRaytracing(Bool_t flag=kTRUE)=0
TPaveText * pt
TText * text
TLine * line
void box(Int_t pat, Double_t x1, Double_t y1, Double_t x2, Double_t y2)
Definition fillpatterns.C:1
Author
Andrei Gheata

Definition in file csgdemo.C.