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TGLObject.cxx
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1// @(#)root/gl:$Id$
2// Author: Matevz Tadel 7/4/2006
3
4/*************************************************************************
5 * Copyright (C) 1995-2006, 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
13#include "TGLObject.h"
14#include "TGLRnrCtx.h"
15#include "TObject.h"
16#include "TClass.h"
17#include "TBaseClass.h"
18#include "TList.h"
19#include "TString.h"
20
21/** \class TGLObject
22\ingroup opengl
23Base-class for direct OpenGL renderers.
24This allows classes to circumvent passing of TBuffer3D and
25use user-provided OpenGL code.
26By convention, if you want class TFoo : public TObject to have direct rendering
27you should also provide TFooGL : public TGLObject and implement
28abstract functions SetModel() and SetBBox().
29TAttBBox can be used to facilitate calculation of bounding-boxes.
30See TPointSet3D and TPointSet3DGL.
31*/
32
34
36
37////////////////////////////////////////////////////////////////////////////////
38/// Decide if display-list should be used for this pass rendering,
39/// as determined by rnrCtx.
40
42{
43 if (!fDLCache ||
44 !fScene ||
45 (rnrCtx.SecSelection() && SupportsSecondarySelect()) ||
46 (fMultiColor && (rnrCtx.Highlight() || rnrCtx.IsDrawPassOutlineLine())) ||
47 (AlwaysSecondarySelect() && rnrCtx.Highlight()))
48 {
49 return kFALSE;
50 }
51
52 return kTRUE;
53}
54
55////////////////////////////////////////////////////////////////////////////////
56/// Update bounding box from external source.
57/// We call abstract SetBBox() and propagate the change to all
58/// attached physicals.
59
61{
62 SetBBox();
64}
65
66////////////////////////////////////////////////////////////////////////////////
67/// Checks if obj is of proper class and sets the model.
68/// Protected helper for subclasses.
69/// Most sub-classes use exception-throwing SetModelDynCast() instead.
70
72{
73 if(obj->InheritsFrom(cls) == kFALSE) {
74 Warning("TGLObject::SetModelCheckClass", "object of wrong class passed.");
75 return kFALSE;
76 }
77 fExternalObj = obj;
78
79 return kTRUE;
80}
81
82////////////////////////////////////////////////////////////////////////////////
83/// Set axis-aligned bounding-box.
84/// Protected helper for subclasses.
85
88 Float_t zmin, Float_t zmax)
89{
91 TGLVertex3(xmax, ymax, zmax));
92}
93
94////////////////////////////////////////////////////////////////////////////////
95/// Set axis-aligned bounding-box.
96/// Protected helper for subclasses.
97
99{
100 SetAxisAlignedBBox(p[0], p[1], p[2], p[3], p[4], p[5]);
101}
102
103
104////////////////////////////////////////////////////////////////////////////////
105/// Recursively search cls and its base classes for a GL-renderer
106/// class.
107
109{
110 TString rnr( cls->GetName() );
111 rnr += "GL";
112 TClass* c = TClass::GetClass(rnr);
113 if (c != 0)
114 return c;
115
116 TList* bases = cls->GetListOfBases();
117 if (bases == 0 || bases->IsEmpty())
118 return 0;
119
120 TIter next_base(bases);
121 TBaseClass* bc;
122 while ((bc = (TBaseClass*) next_base()) != 0) {
123 cls = bc->GetClassPointer();
124 if ((c = SearchGLRenderer(cls)) != 0) {
125 return c;
126 }
127 }
128 return 0;
129}
130
131////////////////////////////////////////////////////////////////////////////////
132/// Return direct-rendering GL class for class isa.
133/// Zero is a valid response.
134
136{
137 TPair* p = (TPair*) fgGLClassMap.FindObject(isa);
138 TClass* cls;
139 if (p != 0) {
140 cls = (TClass*) p->Value();
141 } else {
142 cls = SearchGLRenderer(isa);
143 fgGLClassMap.Add(isa, cls);
144 }
145 return cls;
146}
#define c(i)
Definition: RSha256.hxx:101
const Bool_t kFALSE
Definition: RtypesCore.h:101
bool Bool_t
Definition: RtypesCore.h:63
float Float_t
Definition: RtypesCore.h:57
const Bool_t kTRUE
Definition: RtypesCore.h:100
#define ClassImp(name)
Definition: Rtypes.h:364
void Warning(const char *location, const char *msgfmt,...)
Use this function in warning situations.
Definition: TError.cxx:231
float xmin
Definition: THbookFile.cxx:95
float ymin
Definition: THbookFile.cxx:95
float xmax
Definition: THbookFile.cxx:95
float ymax
Definition: THbookFile.cxx:95
Each class (see TClass) has a linked list of its base class(es).
Definition: TBaseClass.h:33
TClass * GetClassPointer(Bool_t load=kTRUE)
Get pointer to the base class TClass.
Definition: TBaseClass.cxx:63
TClass instances represent classes, structs and namespaces in the ROOT type system.
Definition: TClass.h:80
TList * GetListOfBases()
Return list containing the TBaseClass(es) of a class.
Definition: TClass.cxx:3629
static TClass * GetClass(const char *name, Bool_t load=kTRUE, Bool_t silent=kFALSE)
Static method returning pointer to TClass of the specified class name.
Definition: TClass.cxx:2955
virtual Bool_t IsEmpty() const
Definition: TCollection.h:188
void SetAligned(const TGLVertex3 &lowVertex, const TGLVertex3 &highVertex)
Set ALIGNED box from two low/high vertices.
virtual Bool_t SupportsSecondarySelect() const
TGLBoundingBox fBoundingBox
Also plays the role of ID.
TObject * fExternalObj
first replica
void UpdateBoundingBoxesOfPhysicals()
Update bounding-boxed of all dependent physicals.
TGLScene * fScene
Shape's bounding box.
Bool_t fDLCache
display-list validity bit-field
virtual Bool_t AlwaysSecondarySelect() const
Base-class for direct OpenGL renderers.
Definition: TGLObject.h:22
Bool_t fMultiColor
Definition: TGLObject.h:28
static TClass * SearchGLRenderer(TClass *cls)
Recursively search cls and its base classes for a GL-renderer class.
Definition: TGLObject.cxx:108
virtual Bool_t ShouldDLCache(const TGLRnrCtx &rnrCtx) const
Decide if display-list should be used for this pass rendering, as determined by rnrCtx.
Definition: TGLObject.cxx:41
void SetAxisAlignedBBox(Float_t xmin, Float_t xmax, Float_t ymin, Float_t ymax, Float_t zmin, Float_t zmax)
Set axis-aligned bounding-box.
Definition: TGLObject.cxx:86
static TMap fgGLClassMap
Definition: TGLObject.h:24
virtual void SetBBox()=0
Bool_t SetModelCheckClass(TObject *obj, TClass *cls)
Checks if obj is of proper class and sets the model.
Definition: TGLObject.cxx:71
virtual void UpdateBoundingBox()
Update bounding box from external source.
Definition: TGLObject.cxx:60
static TClass * GetGLRenderer(TClass *isa)
Return direct-rendering GL class for class isa.
Definition: TGLObject.cxx:135
The TGLRnrCtx class aggregates data for a given redering context as needed by various parts of the RO...
Definition: TGLRnrCtx.h:41
Bool_t SecSelection() const
Definition: TGLRnrCtx.h:224
Bool_t IsDrawPassOutlineLine() const
Definition: TGLRnrCtx.h:207
Bool_t Highlight() const
Definition: TGLRnrCtx.h:218
3 component (x/y/z) vertex class.
Definition: TGLUtil.h:84
A doubly linked list.
Definition: TList.h:44
TMap implements an associative array of (key,value) pairs using a THashTable for efficient retrieval ...
Definition: TMap.h:40
void Add(TObject *obj)
This function may not be used (but we need to provide it since it is a pure virtual in TCollection).
Definition: TMap.cxx:54
TObject * FindObject(const char *keyname) const
Check if a (key,value) pair exists with keyname as name of the key.
Definition: TMap.cxx:215
virtual const char * GetName() const
Returns name of object.
Definition: TNamed.h:47
Mother of all ROOT objects.
Definition: TObject.h:37
virtual Bool_t InheritsFrom(const char *classname) const
Returns kTRUE if object inherits from class "classname".
Definition: TObject.cxx:445
Class used by TMap to store (key,value) pairs.
Definition: TMap.h:102
TObject * Value() const
Definition: TMap.h:121
Basic string class.
Definition: TString.h:136