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visualizeWavefrontObj.C File Reference

Detailed Description

Macro allowing to vizualize tessellations from Wavefront's .obj format.

#include <TROOT.h>
#include <TColor.h>
#include <TDatime.h>
#include <TRandom3.h>
#include <TGeoManager.h>
int randomColor()
gRandom = new TRandom3();
TDatime dt;
TColor *color = new TColor(ci, gRandom->Rndm(), gRandom->Rndm(), gRandom->Rndm());
return ci;
void visualizeWavefrontObj(const char *dot_obj_file="", bool check = false)
// Input a file in .obj format (https://en.wikipedia.org/wiki/Wavefront_.obj_file)
// The file should have a single object inside, only vertex and faces information is used
TString name = dot_obj_file;
TString sfile = dot_obj_file;
if (sfile.IsNull()) {
sfile = gROOT->GetTutorialsDir();
sfile += "/geom/teddy.obj";
name.ReplaceAll(".obj", "");
delete gGeoManager;
new TGeoManager(name, "Imported from .obj file");
TGeoMaterial *mat = new TGeoMaterial("Al", 26.98, 13, 2.7);
TGeoMedium *med = new TGeoMedium("MED", 1, mat);
TGeoVolume *top = gGeoManager->MakeBox("TOP", med, 10, 10, 10);
auto tsl = TGeoTessellated::ImportFromObjFormat(sfile.Data(), check);
if (!tsl) return;
TGeoVolume *vol = new TGeoVolume(name, tsl, med);
top->AddNode(vol, 1);
if (!gROOT->IsBatch()) top->Draw("ogl");
char name[80]
Definition TGX11.cxx:110
R__EXTERN TGeoManager * gGeoManager
#define gROOT
Definition TROOT.h:406
R__EXTERN TRandom * gRandom
Definition TRandom.h:62
The color creation and management class.
Definition TColor.h:19
static Int_t GetFreeColorIndex()
Static function: Returns a free color index which can be used to define a user custom color.
Definition TColor.cxx:2005
This class stores the date and time with a precision of one second in an unsigned 32 bit word (950130...
Definition TDatime.h:37
Int_t GetTime() const
Return time in form of 123623 (i.e. 12:36:23)
Definition TDatime.cxx:259
The manager class for any TGeo geometry.
Definition TGeoManager.h:45
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.
Base class describing materials.
Media are used to store properties related to tracking and which are useful only when using geometry ...
Definition TGeoMedium.h:24
static TGeoTessellated * ImportFromObjFormat(const char *objfile, bool check=false, bool verbose=false)
Reader from .obj format.
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.
virtual void Draw(Option_t *option="")
draw top volume according to option
virtual void SetLineWidth(Width_t lwidth)
Set the line width.
virtual void SetLineColor(Color_t lcolor)
Set the line color.
Random number generator class based on M.
Definition TRandom3.h:27
virtual void SetSeed(ULong_t seed=0)
Set the random generator seed.
Definition TRandom.cxx:608
virtual Double_t Rndm()
Machine independent random number generator.
Definition TRandom.cxx:552
Basic string class.
Definition TString.h:136
const char * Data() const
Definition TString.h:369
TString & ReplaceAll(const TString &s1, const TString &s2)
Definition TString.h:692
Bool_t IsNull() const
Definition TString.h:407
Andrei Gheata

Definition in file visualizeWavefrontObj.C.