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Reference Guide
TCrown.cxx
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1// @(#)root/graf:$Id$
2// Author: Rene Brun 108/08/2002
3
4/*************************************************************************
5 * Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
6 * All rights reserved. *
7 * *
8 * For the licensing terms see $ROOTSYS/LICENSE. *
9 * For the list of contributors see $ROOTSYS/README/CREDITS. *
10 *************************************************************************/
11
12#include "Riostream.h"
13#include "TROOT.h"
14#include "TMath.h"
15#include "TCrown.h"
16#include "TVirtualPad.h"
17
19
20/** \class TCrown
21\ingroup BasicGraphics
22
23To draw a Crown.
24
25A crown is specified with the position of its centre, its inner/outer radius
26a minimum and maximum angle. The attributes of the outline line are given via
27TAttLine. The attributes of the fill area are given via TAttFill.
28
29Example:
30
31Begin_Macro(source)
32{
33 TCanvas *c1 = new TCanvas("c1","c1",400,400);
34 TCrown cr1(.5,.5,.3,.4);
35 cr1.SetLineStyle(2);
36 cr1.SetLineWidth(4);
37 cr1.Draw();
38 TCrown cr2(.5,.5,.2,.3,45,315);
39 cr2.SetFillColor(38);
40 cr2.SetFillStyle(3010);
41 cr2.Draw();
42 TCrown cr3(.5,.5,.2,.3,-45,45);
43 cr3.SetFillColor(50);
44 cr3.SetFillStyle(3025);
45 cr3.Draw();
46 TCrown cr4(.5,.5,.0,.2);
47 cr4.SetFillColor(4);
48 cr4.SetFillStyle(3008);
49 cr4.Draw();
50 return c1;
51}
52End_Macro
53*/
54
55////////////////////////////////////////////////////////////////////////////////
56/// Crown default constructor.
57
59{
60}
61
62////////////////////////////////////////////////////////////////////////////////
63/// Crown normal constructor.
64///
65/// \param[in] x1,y1 coordinates of centre of crown
66/// \param[in] radin inner crown radius
67/// \param[in] radout outer crown radius
68/// \param[in] phimin min angle in degrees (default is 0)
69/// \param[in] phimax max angle in degrees (default is 360)
70///
71/// When a crown sector only is drawn, the lines connecting the center
72/// of the crown to the edges are drawn by default. One can specify
73/// the drawing option "only" to not draw these lines.
74
76 :TEllipse(x1,y1,radin,radout,phimin,phimax,0)
77{
78}
79
80////////////////////////////////////////////////////////////////////////////////
81/// Crown copy constructor.
82
83TCrown::TCrown(const TCrown &crown) : TEllipse(crown)
84{
85
86 ((TCrown&)crown).Copy(*this);
87}
88
89////////////////////////////////////////////////////////////////////////////////
90/// Crown default destructor.
91
93{
94}
95
96////////////////////////////////////////////////////////////////////////////////
97/// Copy this crown to crown.
98
99void TCrown::Copy(TObject &crown) const
100{
101
102 TEllipse::Copy(crown);
103}
104
105////////////////////////////////////////////////////////////////////////////////
106/// Compute distance from point px,py to a crown.
107///
108/// If crown is filled, return OK if we are inside
109/// otherwise, crown is found if near the crown edges.
110
112{
113
114 const Double_t kPI = TMath::Pi();
115 Double_t x = gPad->PadtoX(gPad->AbsPixeltoX(px)) - fX1;
116 Double_t y = gPad->PadtoY(gPad->AbsPixeltoY(py)) - fY1;
117
118 Double_t r1 = fR1;
119 Double_t r2 = fR2;
121
122 if (r1>r2) {
123 r1 = fR2;
124 r2 = fR1;
125 }
126
127 Int_t dist = 9999;
128 if (r > r2) return dist;
129 if (r < r1) return dist;
130 if (fPhimax-fPhimin < 360) {
131 Double_t phi = 180*TMath::ACos(x/r)/kPI;
132 if (y<0) phi = 360-phi;
133 Double_t phi1 = fPhimin;
134 Double_t phi2 = fPhimax;
135 if (phi1<0) phi1=phi1+360;
136 if (phi2<0) phi2=phi2+360;
137 if (phi2<phi1) {
138 if (phi < phi1 && phi > phi2) return dist;
139 } else {
140 if (phi < phi1) return dist;
141 if (phi > phi2) return dist;
142 }
143 }
144
145 if (GetFillColor() && GetFillStyle()) {
146 return 0;
147 } else {
148 if (TMath::Abs(r2-r)/r2 < 0.02) return 0;
149 if (TMath::Abs(r1-r)/r1 < 0.02) return 0;
150 }
151 return dist;
152}
153
154////////////////////////////////////////////////////////////////////////////////
155/// Draw this crown with new coordinates.
156
157void TCrown::DrawCrown(Double_t x1, Double_t y1,Double_t radin,Double_t radout,Double_t phimin,Double_t phimax,Option_t *option)
158{
159
160 TCrown *newcrown = new TCrown(x1, y1, radin, radout, phimin, phimax);
161 TAttLine::Copy(*newcrown);
162 TAttFill::Copy(*newcrown);
163 newcrown->SetBit(kCanDelete);
164 newcrown->AppendPad(option);
165}
166
167////////////////////////////////////////////////////////////////////////////////
168/// Execute action corresponding to one event
169///
170/// For the time being TEllipse::ExecuteEvent is used.
171
173{
174
175 TEllipse::ExecuteEvent(event,px,py);
176}
177
178////////////////////////////////////////////////////////////////////////////////
179/// Paint this crown with its current attributes.
180
182{
183
184 const Double_t kPI = TMath::Pi();
185 const Int_t np = 40;
186 static Double_t x[2*np+3], y[2*np+3];
189
190 Double_t angle,dx,dy;
191 Double_t dphi = (fPhimax-fPhimin)*kPI/(180*np);
192 Double_t ct = TMath::Cos(kPI*fTheta/180);
193 Double_t st = TMath::Sin(kPI*fTheta/180);
194 Int_t i;
195 //compute outer points
196 for (i=0;i<=np;i++) {
197 angle = fPhimin*kPI/180 + Double_t(i)*dphi;
198 dx = fR2*TMath::Cos(angle);
199 dy = fR2*TMath::Sin(angle);
200 x[i] = fX1 + dx*ct - dy*st;
201 y[i] = fY1 + dx*st + dy*ct;
202 }
203 //compute inner points
204 for (i=0;i<=np;i++) {
205 angle = fPhimin*kPI/180 + Double_t(i)*dphi;
206 dx = fR1*TMath::Cos(angle);
207 dy = fR1*TMath::Sin(angle);
208 x[2*np-i+1] = fX1 + dx*ct - dy*st;
209 y[2*np-i+1] = fY1 + dx*st + dy*ct;
210 }
211 x[2*np+2] = x[0];
212 y[2*np+2] = y[0];
213 if (fPhimax-fPhimin >= 360 ) {
214 // a complete filled crown
215 if (GetFillColor() && GetFillStyle()) {
216 gPad->PaintFillArea(2*np+2,x,y);
217 }
218 // a complete empty crown
219 if (GetLineStyle()) {
220 gPad->PaintPolyLine(np+1,x,y);
221 gPad->PaintPolyLine(np+1,&x[np+1],&y[np+1]);
222 }
223 } else {
224 //crown segment
225 if (GetFillColor() && GetFillStyle()) gPad->PaintFillArea(2*np+2,x,y);
226 if (GetLineStyle()) gPad->PaintPolyLine(2*np+3,x,y);
227 }
228}
229
230////////////////////////////////////////////////////////////////////////////////
231/// Save primitive as a C++ statement(s) on output stream out.
232
233void TCrown::SavePrimitive(std::ostream &out, Option_t * /*= ""*/)
234{
235
236 out<<" "<<std::endl;
237 if (gROOT->ClassSaved(TCrown::Class())) {
238 out<<" ";
239 } else {
240 out<<" TCrown *";
241 }
242 out<<"crown = new TCrown("<<fX1<<","<<fY1<<","<<fR1<<","<<fR2
243 <<","<<fPhimin<<","<<fPhimax<<");"<<std::endl;
244
245 SaveFillAttributes(out,"crown",0,1001);
246 SaveLineAttributes(out,"crown",1,1,1);
247
248 if (GetNoEdges()) out<<" crown->SetNoEdges();"<<std::endl;
249
250 out<<" crown->Draw();"<<std::endl;
251}
void Class()
Definition: Class.C:29
ROOT::R::TRInterface & r
Definition: Object.C:4
static const double x1[5]
int Int_t
Definition: RtypesCore.h:41
double Double_t
Definition: RtypesCore.h:55
const char Option_t
Definition: RtypesCore.h:62
#define ClassImp(name)
Definition: Rtypes.h:365
const Double_t kPI
Definition: TEllipse.cxx:22
#define gROOT
Definition: TROOT.h:414
#define gPad
Definition: TVirtualPad.h:286
virtual Color_t GetFillColor() const
Return the fill area color.
Definition: TAttFill.h:30
void Copy(TAttFill &attfill) const
Copy this fill attributes to a new TAttFill.
Definition: TAttFill.cxx:202
virtual Style_t GetFillStyle() const
Return the fill area style.
Definition: TAttFill.h:31
virtual void Modify()
Change current fill area attributes if necessary.
Definition: TAttFill.cxx:211
virtual void SaveFillAttributes(std::ostream &out, const char *name, Int_t coldef=1, Int_t stydef=1001)
Save fill attributes as C++ statement(s) on output stream out.
Definition: TAttFill.cxx:234
virtual Style_t GetLineStyle() const
Return the line style.
Definition: TAttLine.h:34
virtual void Modify()
Change current line attributes if necessary.
Definition: TAttLine.cxx:234
void Copy(TAttLine &attline) const
Copy this line attributes to a new TAttLine.
Definition: TAttLine.cxx:164
virtual void SaveLineAttributes(std::ostream &out, const char *name, Int_t coldef=1, Int_t stydef=1, Int_t widdef=1)
Save line attributes as C++ statement(s) on output stream out.
Definition: TAttLine.cxx:262
To draw a Crown.
Definition: TCrown.h:19
virtual void DrawCrown(Double_t x1, Double_t y1, Double_t radin, Double_t radout, Double_t phimin=0, Double_t phimax=360, Option_t *option="")
Draw this crown with new coordinates.
Definition: TCrown.cxx:157
TCrown()
Crown default constructor.
Definition: TCrown.cxx:58
virtual void ExecuteEvent(Int_t event, Int_t px, Int_t py)
Execute action corresponding to one event.
Definition: TCrown.cxx:172
virtual ~TCrown()
Crown default destructor.
Definition: TCrown.cxx:92
void Copy(TObject &crown) const
Copy this crown to crown.
Definition: TCrown.cxx:99
virtual void SavePrimitive(std::ostream &out, Option_t *option="")
Save primitive as a C++ statement(s) on output stream out.
Definition: TCrown.cxx:233
virtual Int_t DistancetoPrimitive(Int_t px, Int_t py)
Compute distance from point px,py to a crown.
Definition: TCrown.cxx:111
virtual void Paint(Option_t *option="")
Paint this crown with its current attributes.
Definition: TCrown.cxx:181
Draw Ellipses.
Definition: TEllipse.h:24
void Copy(TObject &ellipse) const
Copy this ellipse to ellipse.
Definition: TEllipse.cxx:108
Double_t fPhimax
Maximum angle (degrees)
Definition: TEllipse.h:32
Double_t fX1
X coordinate of centre.
Definition: TEllipse.h:27
Bool_t GetNoEdges() const
Return kTRUE if kNoEdges bit is set, kFALSE otherwise.
Definition: TEllipse.cxx:609
Double_t fY1
Y coordinate of centre.
Definition: TEllipse.h:28
Double_t fTheta
Rotation angle (degrees)
Definition: TEllipse.h:33
Double_t fR2
second radius
Definition: TEllipse.h:30
Double_t fPhimin
Minimum angle (degrees)
Definition: TEllipse.h:31
virtual void ExecuteEvent(Int_t event, Int_t px, Int_t py)
Execute action corresponding to one event.
Definition: TEllipse.cxx:197
Double_t fR1
first radius
Definition: TEllipse.h:29
Mother of all ROOT objects.
Definition: TObject.h:37
virtual void AppendPad(Option_t *option="")
Append graphics object to current pad.
Definition: TObject.cxx:105
void SetBit(UInt_t f, Bool_t set)
Set or unset the user status bits as specified in f.
Definition: TObject.cxx:694
@ kCanDelete
if object in a list can be deleted
Definition: TObject.h:58
Double_t y[n]
Definition: legend1.C:17
Double_t x[n]
Definition: legend1.C:17
double dist(Rotation3D const &r1, Rotation3D const &r2)
Definition: 3DDistances.cxx:48
Double_t ACos(Double_t)
Definition: TMath.h:656
Double_t Sqrt(Double_t x)
Definition: TMath.h:679
Double_t Cos(Double_t)
Definition: TMath.h:629
constexpr Double_t Pi()
Definition: TMath.h:38
Double_t Sin(Double_t)
Definition: TMath.h:625
Short_t Abs(Short_t d)
Definition: TMathBase.h:120