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REveUtil.cxx
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1// @(#)root/eve7:$Id$
2// Authors: Matevz Tadel & Alja Mrak-Tadel: 2006, 2007
3
4/*************************************************************************
5 * Copyright (C) 1995-2019, 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 <ROOT/REveUtil.hxx>
13#include <ROOT/REveElement.hxx>
14#include <ROOT/REveManager.hxx>
15
16#include <ROOT/RLogger.hxx>
17
18#include "TError.h"
19#include "TGeoManager.h"
20#include "TGeoMatrix.h"
21#include "TClass.h"
22#include "TMath.h"
23
24#include "TColor.h"
25
26#include "TROOT.h"
27#include "TInterpreter.h"
28
29#include <list>
30#include <algorithm>
31#include <string>
32
33using namespace ROOT::Experimental;
34namespace REX = ROOT::Experimental;
35
37 static RLogChannel sLog("ROOT.Eve");
38 return sLog;
39}
40
41/** \class REveUtil
42\ingroup REve
43Standard utility functions for Eve.
44*/
45
46TObjArray *REveUtil::fgDefaultColors = nullptr;
47
48namespace
49{
50////////////////////////////////////////////////////////////////////////////////
51/// Remove last part of string 's', starting from the last
52/// occurrence of character 'c'.
53/// Remove directory part -- everything until the last '/'.
54
55void ChompTailAndDir(TString& s, char c='.')
56{
57 Ssiz_t p = s.Last(c);
58 if (p != kNPOS)
59 s.Remove(p);
60
61 Ssiz_t ls = s.Last('/');
62 if (ls != kNPOS)
63 s.Remove(0, ls + 1);
64}
65}
66
67////////////////////////////////////////////////////////////////////////////////
68/// Checks if macro 'mac' is loaded.
69
70Bool_t REveUtil::CheckMacro(const char* mac)
71{
72 // Axel's advice; now sth seems slow, using old method below for test.
73 // return gROOT->GetInterpreter()->IsLoaded(mac);
74
75 // Previous version expected function with same name and used ROOT's
76 // list of global functions.
77
78 TString foo(mac); ChompTailAndDir(foo);
79 if (gROOT->GetGlobalFunction(foo.Data(), 0, kFALSE) != 0)
80 return kTRUE;
81 else
82 return (gROOT->GetGlobalFunction(foo.Data(), 0, kTRUE) != 0);
83}
84
85////////////////////////////////////////////////////////////////////////////////
86/// Load and execute macro 'mac' if it has not been loaded yet.
87
88void REveUtil::AssertMacro(const char* mac)
89{
90 if( CheckMacro(mac) == kFALSE) {
91 gROOT->Macro(mac);
92 }
93}
94
95////////////////////////////////////////////////////////////////////////////////
96/// Execute macro 'mac'. Do not reload the macro.
97
98void REveUtil::Macro(const char* mac)
99{
100 if (CheckMacro(mac) == kFALSE) {
101 gROOT->LoadMacro(mac);
102 }
103 TString foo(mac); ChompTailAndDir(foo); foo += "()";
104 gROOT->ProcessLine(foo.Data());
105}
106
107////////////////////////////////////////////////////////////////////////////////
108/// Makes sure that macro 'mac' is loaded, but do not reload it.
109
110void REveUtil::LoadMacro(const char* mac)
111{
112 if (CheckMacro(mac) == kFALSE) {
113 gROOT->LoadMacro(mac);
114 }
115}
116
117////////////////////////////////////////////////////////////////////////////////
118/// Fill col with RGBA values corresponding to index ci. If alpha
119/// is true, set alpha component of col to 255.
120/// ROOT's indexed color palette does not support transparency.
121
123{
124 TColor* c = gROOT->GetColor(ci);
125 if (c)
126 {
127 col[0] = (UChar_t)(255*c->GetRed());
128 col[1] = (UChar_t)(255*c->GetGreen());
129 col[2] = (UChar_t)(255*c->GetBlue());
130 if (alpha) col[3] = 255;
131 }
132 else
133 {
134 // Set to magenta.
135 col[0] = 255; col[1] = 0; col[2] = 255;
136 if (alpha) col[3] = 255;
137 return;
138 }
139}
140
141////////////////////////////////////////////////////////////////////////////////
142/// Fill col with RGBA values corresponding to index ci and transparency.
143/// ROOT's indexed color palette does not support transparency.
144
145void REveUtil::ColorFromIdx(Color_t ci, UChar_t col[4], Char_t transparency)
146{
147 UChar_t alpha = (255*(100 - transparency))/100;
148
149 TColor* c = gROOT->GetColor(ci);
150 if (c)
151 {
152 col[0] = (UChar_t)(255*c->GetRed());
153 col[1] = (UChar_t)(255*c->GetGreen());
154 col[2] = (UChar_t)(255*c->GetBlue());
155 col[3] = alpha;
156 }
157 else
158 {
159 // Set to magenta.
160 col[0] = 255; col[1] = 0; col[2] = 255; col[3] = alpha;
161 return;
162 }
163}
164
165////////////////////////////////////////////////////////////////////////////////
166/// Fill col with weighted RGBA values corresponding to
167/// color-indices c1 and c2. If alpha is true, set alpha component
168/// of col to 255.
169
171 UChar_t col[4], Bool_t alpha)
172{
174 TColor* t2 = gROOT->GetColor(c2);
175 if(t1 && t2) {
176 col[0] = (UChar_t)(255*(f1*t1->GetRed() + f2*t2->GetRed()));
177 col[1] = (UChar_t)(255*(f1*t1->GetGreen() + f2*t2->GetGreen()));
178 col[2] = (UChar_t)(255*(f1*t1->GetBlue() + f2*t2->GetBlue()));
179 if (alpha) col[3] = 255;
180 }
181}
182
183////////////////////////////////////////////////////////////////////////////////
184/// Find address of Color_t data-member with name varname in object
185/// obj.
186///
187/// This is used to access color information for TGListTreeItem
188/// coloration from visualization macros that wrap TObjects into
189/// REveElementObjectPtr instances.
190
191Color_t* REveUtil::FindColorVar(TObject* obj, const char* varname)
192{
193 static const REveException eh("REveUtil::FindColorVar");
194
195 Int_t off = obj->IsA()->GetDataMemberOffset(varname);
196 if(off == 0)
197 throw(eh + "could not find member '" + varname + "' in class " + obj->IsA()->GetName() + ".");
198 return (Color_t*) (((char*)obj) + off);
199}
200
201////////////////////////////////////////////////////////////////////////////////
202/// Tweak all ROOT colors to become brighter (if value > 0) or
203/// darker (value < 0). Reasonable values for the value argument are
204/// from -2.5 to 2.5 (error will be printed otherwise).
205/// If value is zero, the original colors are restored.
206///
207/// You should call REveManager::FullRedraw3D() afterwards or set
208/// the argument full_redraw to true (default is false).
209
211{
212 if (value < -2.5 || value > 2.5)
213 {
214 Error("REveUtil::SetColorBrightness", "value '%f' out of range [-0.5, 0.5].", value);
215 return;
216 }
217
218 TObjArray *colors = (TObjArray*) gROOT->GetListOfColors();
219
220 if (fgDefaultColors == 0)
221 {
222 const Int_t n_col = colors->GetEntriesFast();
223 fgDefaultColors = new TObjArray(n_col);
224 for (Int_t i = 0; i < n_col; ++i)
225 {
226 TColor* c = (TColor*) colors->At(i);
227 if (c)
228 fgDefaultColors->AddAt(new TColor(*c), i);
229 }
230 }
231
232 const Int_t n_col = fgDefaultColors->GetEntriesFast();
233 for (Int_t i = 0; i < n_col; ++i)
234 {
235 TColor* cdef = (TColor*) fgDefaultColors->At(i);
236 if (cdef)
237 {
238 TColor* croot = (TColor*) colors->At(i);
239 if (!croot)
240 {
241 croot = new TColor(*cdef);
242 colors->AddAt(croot, i);
243 }
244 else
245 {
246 cdef->Copy(*croot);
247 }
248
249 Float_t r, g, b;
250 croot->GetRGB(r, g, b);
251 r = TMath::Power( r, (2.5 - value)/2.5);
252 g = TMath::Power(g, (2.5 - value)/2.5);
253 b = TMath::Power(b, (2.5 - value)/2.5);
254
255 r = TMath::Min(r, 1.0f);
256 g = TMath::Min(g, 1.0f);
257 b = TMath::Min(b, 1.0f);
258
259 croot->SetRGB(r, g, b);
260 }
261 else
262 {
263 delete colors->RemoveAt(i);
264 }
265 }
266
267 if (full_redraw && REX::gEve)
269}
270
271////////////////////////////////////////////////////////////////////////////////
272/// Return true if interval Q is contained within interval M for U1 variables.
273/// It is assumed that all values are within the [-2pi, 2pi] interval and
274/// minM <= maxM & minQ <= maxQ.
275
277 Float_t minQ, Float_t maxQ)
278{
279 using namespace TMath;
280
281 if (maxQ < minM)
282 {
283 minQ += TwoPi(); maxQ += TwoPi();
284 }
285 else if (minQ > maxM)
286 {
287 minQ -= TwoPi(); maxQ -= TwoPi();
288 }
289 return minQ >= minM && maxQ <= maxM;
290}
291
292////////////////////////////////////////////////////////////////////////////////
293/// Return true if interval Q is overlapping within interval M for U1 variables.
294/// It is assumed that all values are within the [-2pi, 2pi] interval and
295/// minM <= maxM & minQ <= maxQ.
296
298 Float_t minQ, Float_t maxQ)
299{
300 using namespace TMath;
301
302 if (maxQ < minM)
303 {
304 minQ += TwoPi(); maxQ += TwoPi();
305 }
306 else if (minQ > maxM)
307 {
308 minQ -= TwoPi(); maxQ -= TwoPi();
309 }
310 return maxQ >= minM && minQ <= maxM;
311}
312
313////////////////////////////////////////////////////////////////////////////////
314/// Get fraction of interval [minQ, maxQ] in [minM, maxM]
315
317{
318 if (minQ>=minM && maxQ<=maxM)
319 return 1;
320
321 else if (minQ<minM && maxQ>maxM)
322 return (maxM-minM)/(maxQ-minQ);
323
324 else if (minQ>=minM && maxQ>maxM)
325 return (maxM-minQ)/(maxQ-minQ);
326
327 else if (minQ<minM && maxQ<=maxM)
328 return (maxQ-minM)/(maxQ-minQ);
329
330 return 0;
331}
332
333
334/** \class REveGeoManagerHolder
335\ingroup REve
336Exception safe wrapper for setting gGeoManager.
337Functionality to lock-unlock via setting of a static lock in
338TGeoManager should be added (new feature of TGeoManager).
339*/
340
341////////////////////////////////////////////////////////////////////////////////
342/// Constructor.
343/// If n_seg is specified and larger than 2, the new geo-manager's
344/// NSegments is set to this value.
345
347 fManager (gGeoManager),
348 fNSegments (0)
349{
350 gGeoManager = new_gmgr;
351 if (gGeoManager) {
353 if (n_seg > 2) {
356 }
357 } else {
358 gGeoIdentity = nullptr;
359 }
360}
361
362////////////////////////////////////////////////////////////////////////////////
363/// Destructor.
364
366{
367 if (gGeoManager && fNSegments > 2) {
369 }
371 if (gGeoManager) {
373 } else {
374 gGeoIdentity = nullptr;
375 }
376}
377
378/** \class REveRefCnt
379\ingroup REve
380Base-class for reference-counted objects.
381By default the object is destroyed when zero reference-count is reached.
382*/
383
384/** \class REveRefBackPtr
385\ingroup REve
386Base-class for reference-counted objects with reverse references to
387REveElement objects.
388*/
389
390////////////////////////////////////////////////////////////////////////////////
391/// Default constructor.
392
394 REveRefCnt(),
395 fBackRefs()
396{
397}
398
399////////////////////////////////////////////////////////////////////////////////
400/// Destructor. Noop, should complain if back-ref list is not empty.
401
403{
404 // !!! Complain if list not empty.
405}
406
407////////////////////////////////////////////////////////////////////////////////
408/// Copy constructor. New copy starts with zero reference count and
409/// empty back-reference list.
410
412 REveRefCnt(),
413 fBackRefs()
414{
415}
416
417////////////////////////////////////////////////////////////////////////////////
418/// Assignment operator. Reference count and back-reference
419/// information is not assigned as these object hold pointers to a
420/// specific object.
421
423{
424 return *this;
425}
426
427////////////////////////////////////////////////////////////////////////////////
428/// Increase reference count and add re to the list of back-references.
429
431{
433 ++fBackRefs[re];
434}
435
436////////////////////////////////////////////////////////////////////////////////
437/// Decrease reference count and remove re from the list of back-references.
438
440{
441 auto i = fBackRefs.find(re);
442 if (i != fBackRefs.end()) {
443 if (--(i->second) <= 0)
444 fBackRefs.erase(i);
446 } else {
447 Warning("REveRefBackPtr::DecRefCount", "element '%s' not found in back-refs.", re->GetCName());
448 }
449}
450
451////////////////////////////////////////////////////////////////////////////////
452/// Add given stamps to elements in the list of reverse references.
453
455{
456 for (auto &i: fBackRefs)
457 i.first->AddStamp(stamps);
458}
ROOT::R::TRInterface & r
Definition Object.C:4
#define b(i)
Definition RSha256.hxx:100
#define c(i)
Definition RSha256.hxx:101
#define g(i)
Definition RSha256.hxx:105
const Ssiz_t kNPOS
Definition RtypesCore.h:115
unsigned char UChar_t
Definition RtypesCore.h:38
char Char_t
Definition RtypesCore.h:37
const Bool_t kFALSE
Definition RtypesCore.h:92
short Color_t
Definition RtypesCore.h:83
const Bool_t kTRUE
Definition RtypesCore.h:91
void Error(const char *location, const char *msgfmt,...)
Use this function in case an error occurred.
Definition TError.cxx:187
void Warning(const char *location, const char *msgfmt,...)
Use this function in warning situations.
Definition TError.cxx:231
R__EXTERN TGeoManager * gGeoManager
R__EXTERN TGeoIdentity * gGeoIdentity
Definition TGeoMatrix.h:478
#define gROOT
Definition TROOT.h:406
Color * colors
Definition X3DBuffer.c:21
const char * GetCName() const
REveException Exception-type thrown by Eve classes.
Definition REveTypes.hxx:40
Int_t fNSegments
! previous settings for num segments
Definition REveUtil.hxx:94
TGeoManager * fManager
! hold manager
Definition REveUtil.hxx:93
REveGeoManagerHolder(TGeoManager *new_gmgr=nullptr, Int_t n_seg=0)
Constructor.
Definition REveUtil.cxx:346
void FullRedraw3D(Bool_t resetCameras=kFALSE, Bool_t dropLogicals=kFALSE)
Perform 3D redraw of all scenes and viewers.
REveRefBackPtr reference-count with back pointers.
Definition REveUtil.hxx:134
virtual ~REveRefBackPtr()
Destructor. Noop, should complain if back-ref list is not empty.
Definition REveUtil.cxx:402
REveRefBackPtr & operator=(const REveRefBackPtr &)
Assignment operator.
Definition REveUtil.cxx:422
REveRefBackPtr()
Default constructor.
Definition REveUtil.cxx:393
virtual void StampBackPtrElements(UChar_t stamps)
Add given stamps to elements in the list of reverse references.
Definition REveUtil.cxx:454
REveRefCnt REveRefCnt base-class (interface)
Definition REveUtil.hxx:107
static Bool_t IsU1IntervalOverlappingByMinMax(Float_t minM, Float_t maxM, Float_t minQ, Float_t maxQ)
Return true if interval Q is overlapping within interval M for U1 variables.
Definition REveUtil.cxx:297
static void LoadMacro(const char *mac)
Makes sure that macro 'mac' is loaded, but do not reload it.
Definition REveUtil.cxx:110
static void Macro(const char *mac)
Execute macro 'mac'. Do not reload the macro.
Definition REveUtil.cxx:98
static Bool_t CheckMacro(const char *mac)
Checks if macro 'mac' is loaded.
Definition REveUtil.cxx:70
static Float_t GetFraction(Float_t minM, Float_t maxM, Float_t minQ, Float_t maxQ)
Get fraction of interval [minQ, maxQ] in [minM, maxM].
Definition REveUtil.cxx:316
static void SetColorBrightness(Float_t value, Bool_t full_redraw=kFALSE)
Tweak all ROOT colors to become brighter (if value > 0) or darker (value < 0).
Definition REveUtil.cxx:210
static Bool_t IsU1IntervalContainedByMinMax(Float_t minM, Float_t maxM, Float_t minQ, Float_t maxQ)
Return true if interval Q is contained within interval M for U1 variables.
Definition REveUtil.cxx:276
static void ColorFromIdx(Color_t ci, UChar_t col[4], Bool_t alpha=kTRUE)
Fill col with RGBA values corresponding to index ci.
Definition REveUtil.cxx:122
static Color_t * FindColorVar(TObject *obj, const char *varname)
Find address of Color_t data-member with name varname in object obj.
Definition REveUtil.cxx:191
static void AssertMacro(const char *mac)
Load and execute macro 'mac' if it has not been loaded yet.
Definition REveUtil.cxx:88
static TObjArray * fgDefaultColors
Definition REveUtil.hxx:42
A log configuration for a channel, e.g.
Definition RLogger.hxx:101
The color creation and management class.
Definition TColor.h:19
virtual void SetRGB(Float_t r, Float_t g, Float_t b)
Initialize this color and its associated colors.
Definition TColor.cxx:1705
virtual void GetRGB(Float_t &r, Float_t &g, Float_t &b) const
Definition TColor.h:51
Float_t GetRed() const
Definition TColor.h:57
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
void Copy(TObject &color) const
Copy this color to obj.
Definition TColor.cxx:1233
Float_t GetBlue() const
Definition TColor.h:59
Float_t GetGreen() const
Definition TColor.h:58
An identity transformation.
Definition TGeoMatrix.h:384
The manager class for any TGeo geometry.
Definition TGeoManager.h:45
TObjArray * GetListOfMatrices() const
void SetNsegments(Int_t nseg)
Set number of segments for approximating circles in drawing.
Int_t GetNsegments() const
Get number of segments approximating circles.
An array of TObjects.
Definition TObjArray.h:37
Int_t GetEntriesFast() const
Definition TObjArray.h:64
virtual void AddAt(TObject *obj, Int_t idx)
Add object at position ids.
TObject * At(Int_t idx) const
Definition TObjArray.h:166
Mother of all ROOT objects.
Definition TObject.h:37
virtual const char * GetName() const
Returns name of object.
Definition TObject.cxx:359
Basic string class.
Definition TString.h:136
const char * Data() const
Definition TString.h:369
Ssiz_t Last(char c) const
Find last occurrence of a character c.
Definition TString.cxx:912
TString & Remove(Ssiz_t pos)
Definition TString.h:673
return c1
Definition legend1.C:41
TF1 * f1
Definition legend1.C:11
return c2
Definition legend2.C:14
R__EXTERN REveManager * gEve
RLogChannel & EveLog()
Log channel for Eve diagnostics.
Definition REveUtil.cxx:36
TMath.
Definition TMathBase.h:35
LongDouble_t Power(LongDouble_t x, LongDouble_t y)
Definition TMath.h:735
Short_t Min(Short_t a, Short_t b)
Definition TMathBase.h:180
auto * t1
Definition textangle.C:20