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Detailed Description

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Draw 2-Dim functions.

void surfaces()
{
TCanvas *c1 = new TCanvas("c1", "Surfaces Drawing Options", 200, 10, 700, 900);
TPaveText *title = new TPaveText(.2, 0.96, .8, .995);
title->AddText("Examples of Surface options");
title->Draw();
TPad *pad1 = new TPad("pad1", "Gouraud shading", 0.03, 0.50, 0.98, 0.95);
TPad *pad2 = new TPad("pad2", "Color mesh", 0.03, 0.02, 0.98, 0.48);
pad1->Draw();
pad2->Draw();
//
// We generate a 2-D function
TF2 *f2 = new TF2("f2", "x**2 + y**2 - x**3 -8*x*y**4", -1, 1.2, -1.5, 1.5);
f2->SetContour(48);
f2->SetFillColor(45);
// Draw this function in pad1 with Gouraud shading option
pad1->cd();
pad1->SetPhi(-80);
pad1->SetLogz();
f2->Draw("surf4");
// Draw this function in pad2 with color mesh option
pad2->cd();
pad2->SetTheta(25);
pad2->SetPhi(-110);
pad2->SetLogz();
f2->SetLineWidth(1);
f2->SetLineColor(5);
f2->Draw("surf1");
// add axis titles. The titles are set on the intermediate
// histogram used for visualisation. We must force this histogram
// to be created, then force the redrawing of the two pads
pad2->Update();
f2->GetHistogram()->GetXaxis()->SetTitle("x title");
f2->GetHistogram()->GetYaxis()->SetTitle("y title");
f2->GetHistogram()->GetXaxis()->SetTitleOffset(1.4);
f2->GetHistogram()->GetYaxis()->SetTitleOffset(1.4);
pad1->Modified();
pad2->Modified();
}
virtual void SetFillColor(Color_t fcolor)
Set the fill area color.
Definition TAttFill.h:38
virtual void SetLineWidth(Width_t lwidth)
Set the line width.
Definition TAttLine.h:45
virtual void SetLineColor(Color_t lcolor)
Set the line color.
Definition TAttLine.h:42
The Canvas class.
Definition TCanvas.h:23
virtual TH1 * GetHistogram() const
Return a pointer to the histogram used to visualise the function Note that this histogram is managed ...
Definition TF1.cxx:1606
A 2-Dim function with parameters.
Definition TF2.h:29
virtual void SetContour(Int_t nlevels=20, const Double_t *levels=nullptr)
Set the number and values of contour levels.
Definition TF2.cxx:939
void Draw(Option_t *option="") override
Draw this function with its current attributes.
Definition TF2.cxx:269
The most important graphics class in the ROOT system.
Definition TPad.h:28
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.
void Draw(Option_t *option="") override
Draw this pavetext with its current attributes.
return c1
Definition legend1.C:41
Author
Rene Brun

Definition in file surfaces.C.