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glrose.C File Reference

Detailed Description

Render a TF2 looking like a rose.

It defines and set a user's palette, and use polar system.

void glrose()
const Int_t paletteSize = 10;
Float_t rgb[paletteSize * 3] =
{0.80f, 0.55f, 0.40f,
0.85f, 0.60f, 0.45f,
0.90f, 0.65f, 0.50f,
0.95f, 0.70f, 0.55f,
1.f, 0.75f, 0.60f,
1.f, 0.80f, 0.65f,
1.f, 0.85f, 0.70f,
1.f, 0.90f, 0.75f,
1.f, 0.95f, 0.80f,
1.f, 1.f, 0.85f};
Int_t palette[paletteSize] = {0};
for (Int_t i = 0; i < paletteSize; ++i)
palette[i] = TColor::GetColor(rgb[i * 3], rgb[i * 3 + 1], rgb[i * 3 + 2]);
gStyle->SetPalette(paletteSize, palette);
TCanvas *cnv = new TCanvas("glc", "Surface sample", 200, 10, 600, 550);
TPaveLabel *title = new TPaveLabel(0.04, 0.86, 0.96, 0.98,
"\"glsurf2pol\" option + user defined palette.");
TPad *rosePad = new TPad("box", "box", 0.04, 0.04, 0.96, 0.8);
TF2 *fun = new TF2("a", "cos(y)*sin(x)+cos(x)*sin(y)", -6, 6, -6, 6);
int Int_t
Definition RtypesCore.h:45
float Float_t
Definition RtypesCore.h:57
R__EXTERN TStyle * gStyle
Definition TStyle.h:412
virtual void SetFillColor(Color_t fcolor)
Set the fill area color.
Definition TAttFill.h:37
The Canvas class.
Definition TCanvas.h:23
static Int_t GetColor(const char *hexcolor)
Static method returning color number for color specified by hex color string of form: "#rrggbb",...
Definition TColor.cxx:1769
virtual void SetNpx(Int_t npx=100)
Set the number of points used to draw the function.
Definition TF1.cxx:3446
A 2-Dim function with parameters.
Definition TF2.h:29
virtual void SetNpy(Int_t npy=100)
Set the number of points used to draw the function.
Definition TF2.cxx:936
virtual void SetContour(Int_t nlevels=20, const Double_t *levels=0)
Set the number and values of contour levels.
Definition TF2.cxx:901
virtual void Draw(Option_t *option="")
Draw this function with its current attributes.
Definition TF2.cxx:241
The most important graphics class in the ROOT system.
Definition TPad.h:26
TVirtualPad * cd(Int_t subpadnumber=0) override
Set Current pad.
Definition TPad.cxx:603
void Draw(Option_t *option="") override
Draw Pad in Current pad (re-parent pad if necessary).
Definition TPad.cxx:1299
A Pave (see TPave) with a text centered in the Pave.
Definition TPaveLabel.h:20
virtual void Draw(Option_t *option="")
Draw this pavelabel with its current attributes.
void SetPalette(Int_t ncolors=kBird, Int_t *colors=0, Float_t alpha=1.)
See TColor::SetPalette.
Definition TStyle.cxx:1782
void SetCanvasPreferGL(Bool_t prefer=kTRUE)
Definition TStyle.h:325
Timur Pocheptsov

Definition in file glrose.C.