Logo ROOT  
Reference Guide
tornado.C
Go to the documentation of this file.
1/// \file
2/// \ingroup tutorial_graphics
3/// \notebook
4/// Show 3-d polymarker.
5///
6/// \macro_image
7/// \macro_code
8///
9/// \author Rene Brun
10
11void tornado() {
12 gBenchmark->Start("tornado");
13
14 double PI = 3.141592653;
15 int d = 16;
16 int numberOfPoints=200;
17 int numberOfCircles=40;
18
19 // create and open a canvas
20 TCanvas *sky = new TCanvas( "sky", "Tornado", 300, 10, 700, 500 );
21 sky->SetFillColor(14);
22
23 // creating view
24 TView *view = TView::CreateView(1,0,0);
25 float range = numberOfCircles*d;
26 view->SetRange( 0, 0, 0, 4.0*range, 2.0*range, range );
27
28 for( int j = d; j < numberOfCircles*d; j += d ) {
29
30 // create a PolyMarker3D
31 TPolyMarker3D *pm3d = new TPolyMarker3D( numberOfPoints );
32
33 float x, y, z;
34
35 // set points
36 for( int i = 1; i < numberOfPoints; i++ ) {
37 float csin = sin(2*PI / (double)numberOfPoints * (double)i) + 1;
38 float ccos = cos(2*PI / (double)numberOfPoints * (double)i) + 1;
39 float esin = sin(2*PI / (double)(numberOfCircles*d) * (double)j) + 1;
40 x = j * ( csin + esin );
41 y = j * ccos;
42 z = j;
43 pm3d->SetPoint( i, x, y, z );
44 }
45
46 // set marker size, color & style
47 pm3d->SetMarkerSize( 1 );
48 pm3d->SetMarkerColor( 2 + ( d == ( j & d ) ) );
49 pm3d->SetMarkerStyle( 3 );
50
51 //draw
52 pm3d->Draw();
53 }
54
55 char timeStr[60];
56 gBenchmark->Show("tornado");
57
58 Float_t ct = gBenchmark->GetCpuTime("tornado");
59 sprintf( timeStr, "Execution time: %g sec.", ct);
60
61 TPaveText *text = new TPaveText( 0.1, 0.81, 0.9, 0.97 );
62 text->SetFillColor( 42 );
63 text->AddText("ROOT example: tornado.C");
64 text->AddText(timeStr);
65 text->Draw();
66 sky->Update();
67}
#define d(i)
Definition: RSha256.hxx:102
float Float_t
Definition: RtypesCore.h:57
#define PI
R__EXTERN TBenchmark * gBenchmark
Definition: TBenchmark.h:59
double cos(double)
double sin(double)
virtual void SetFillColor(Color_t fcolor)
Set the fill area color.
Definition: TAttFill.h:37
virtual void SetMarkerColor(Color_t mcolor=1)
Set the marker color.
Definition: TAttMarker.h:38
virtual void SetMarkerStyle(Style_t mstyle=1)
Set the marker style.
Definition: TAttMarker.h:40
virtual void SetMarkerSize(Size_t msize=1)
Set the marker size.
Definition: TAttMarker.h:41
virtual void Start(const char *name)
Starts Benchmark with the specified name.
Definition: TBenchmark.cxx:172
virtual void Show(const char *name)
Stops Benchmark name and Prints results.
Definition: TBenchmark.cxx:155
Float_t GetCpuTime(const char *name)
Returns Cpu time used by Benchmark name.
Definition: TBenchmark.cxx:117
The Canvas class.
Definition: TCanvas.h:23
void Update() override
Update canvas pad buffers.
Definition: TCanvas.cxx:2502
virtual void Draw(Option_t *option="")
Default Draw method for all objects.
Definition: TObject.cxx:197
A Pave (see TPave) with text, lines or/and boxes inside.
Definition: TPaveText.h:21
A 3D polymarker.
Definition: TPolyMarker3D.h:33
void SetPoint(Int_t n, Double_t x, Double_t y, Double_t z)
Set point n to x, y, z.
virtual void Draw(Option_t *option="")
Draws 3-D polymarker with its current attributes.
See TView3D.
Definition: TView.h:25
static TView * CreateView(Int_t system=1, const Double_t *rmin=0, const Double_t *rmax=0)
Create a concrete default 3-d view via the plug-in manager.
Definition: TView.cxx:27
virtual void SetRange(const Double_t *min, const Double_t *max)=0
TText * text
Double_t y[n]
Definition: legend1.C:17
Double_t x[n]
Definition: legend1.C:17