28typedef std::vector<Double_t> vector_type;
29typedef vector_type::size_type size_type;
32void create_flower(vector_type &xs, vector_type &ys, size_type nPoints,
Double_t r)
34 assert(nPoints > 100 &&
"create_flower, number of points is too small");
36 xs.resize(nPoints + 1);
37 ys.resize(nPoints + 1);
41 for (size_type i = 0; i <= nPoints; ++i) {
46 r * (1 +
TMath::Sin(11 * u / 5)) - 4 * p4 * p4 * p4 * p4 * p8 * p8 * p8 * p8 * p8 * p8 * p8 * p8;
60 ::Error(
"flower",
"failed to create custom colors");
65 TCanvas *
const cnv =
new TCanvas(
"Chrysanthemum",
"Chrysanthemum", 900, 900);
67 ::Error(
"flower",
"This macro requires OS X version of ROOT with cocoa enabled");
77 create_flower(xs, ys, 300, 6);
79 new TColor(indices[0], 0., 0., 0.5,
"custom_blue", 0.7);
84 create_flower(xs, ys, 500000, 8);
86 new TColor(indices[1], 0.5, 0., 0.5,
"custom_purple", 0.5);
91 create_flower(xs, ys, 100000, 10);
95 new TColor(indices[2], 1., 0., 0.4,
"custom_magenta", 0.2);
void Error(const char *location, const char *msgfmt,...)
Use this function in case an error occurred.
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void char Point_t Rectangle_t WindowAttributes_t Float_t r
Option_t Option_t TPoint TPoint angle
virtual void SetFillColor(Color_t fcolor)
Set the fill area color.
TVirtualPad * cd(Int_t subpadnumber=0) override
Set current canvas & pad.
The color creation and management class.
A TGraph is an object made of two arrays X and Y with npoints each.
void SetName(const char *name="") override
Set graph name.
void SetTitle(const char *title="") override
Change (i.e.
A TMultiGraph is a collection of TGraph (or derived) objects.
virtual void Add(TGraph *graph, Option_t *chopt="")
Add a new graph to the list of graphs.
void Draw(Option_t *chopt="") override
Draw this multigraph with its current attributes.
unsigned FindFreeCustomColorIndices(Color_t(&indices)[N])
Double_t Cos(Double_t)
Returns the cosine of an angle of x radians.
Double_t Sin(Double_t)
Returns the sine of an angle of x radians.