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Reference Guide
TGLText.cxx
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1// @(#)root/gl:$Id$
2// Author: Olivier Couet 12/04/2007
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#include "Riostream.h"
13#include "TROOT.h"
14#include "TError.h"
15
16#include "TGLText.h"
17#include "TGLUtil.h"
18#include "TColor.h"
19#include "TSystem.h"
20#include "TEnv.h"
21#include "TGLIncludes.h"
22
23// Direct inclusion of FTGL headers is deprecated in ftgl-2.1.3 while
24// ftgl-2.1.2 shipped with ROOT requires manual inclusion.
25#ifndef BUILTIN_FTGL
26# include <FTGL/ftgl.h>
27#else
28# include "FTFont.h"
29# include "FTGLExtrdFont.h"
30# include "FTGLOutlineFont.h"
31# include "FTGLPolygonFont.h"
32# include "FTGLTextureFont.h"
33# include "FTGLPixmapFont.h"
34# include "FTGLBitmapFont.h"
35#endif
36
37#define FTGL_BITMAP 0
38#define FTGL_PIXMAP 1
39#define FTGL_OUTLINE 2
40#define FTGL_POLYGON 3
41#define FTGL_EXTRUDE 4
42#define FTGL_TEXTURE 5
43
44/** \class TGLText
45\ingroup opengl
46GL Text.
47
48To draw a 3D text in a GL window. This class uses uses FTGL to render text.
49FTGL is a package making the interface between the Free Type fonts and GL.
50*/
51
53
54////////////////////////////////////////////////////////////////////////////////
55
57{
58 fX = 0;
59 fY = 0;
60 fZ = 0;
61 fAngle1 = 90;
62 fAngle2 = 0;
63 fAngle3 = 0;
64 fGLTextFont = 0;
65 SetGLTextFont(13); // Default font.
66}
67
68
69////////////////////////////////////////////////////////////////////////////////
70/// TGLext normal constructor.
71
72TGLText::TGLText(Double_t x, Double_t y, Double_t z, const char * /*text*/)
73{
74 fX = x;
75 fY = y;
76 fZ = z;
77 fAngle1 = 90;
78 fAngle2 = 0;
79 fAngle3 = 0;
80 fGLTextFont = 0;
81 SetGLTextFont(13); // Default font.
82}
83
84
85////////////////////////////////////////////////////////////////////////////////
86
88{
89 if (fGLTextFont) delete fGLTextFont;
90}
91
92
93////////////////////////////////////////////////////////////////////////////////
94/// Draw text
95
97{
98 if (!fGLTextFont) return;
99
100 glPushMatrix();
101 glTranslatef(x, y, z);
102
105 glScalef(s,s,s);
106
107 // Text alignment
108 Float_t llx, lly, llz, urx, ury, urz;
109 fGLTextFont->BBox(text, llx, lly, llz, urx, ury, urz);
110 Short_t halign = fTextAlign/10;
111 Short_t valign = fTextAlign - 10*halign;
112 Float_t dx = 0, dy = 0;
113 switch (halign) {
114 case 1 : dx = 0 ; break;
115 case 2 : dx = -urx/2; break;
116 case 3 : dx = -urx ; break;
117 }
118 switch (valign) {
119 case 1 : dy = 0 ; break;
120 case 2 : dy = -ury/2; break;
121 case 3 : dy = -ury ; break;
122 }
123 glTranslatef(dx, dy, 0);
124
125 //In XY plane
126 glRotatef(fAngle1,1.,0.,0.);
127
128 //In XZ plane
129 glRotatef(fAngle2,0.,1.,0.);
130
131 //In YZ plane
132 glRotatef(fAngle3,0.,0.,1.);
133
134 // Render text
135 fGLTextFont->Render(text);
136
137 glPopMatrix();
138}
139
140
141////////////////////////////////////////////////////////////////////////////////
142
143void TGLText::PaintBBox(const char *text)
144{
145 Float_t llx, lly, llz, urx, ury, urz;
146 fGLTextFont->BBox(text, llx, lly, llz, urx, ury, urz);
147 glBegin(GL_LINES);
148 glVertex3f( 0, 0, 0); glVertex3f( urx, 0, 0);
149 glVertex3f( 0, 0, 0); glVertex3f( 0, ury, 0);
150 glVertex3f( 0, ury, 0); glVertex3f( urx, ury, 0);
151 glVertex3f( urx, ury, 0); glVertex3f( urx, 0, 0);
152 glEnd();
153}
154
155////////////////////////////////////////////////////////////////////////////////
156/// Calculate bounding-box for given string.
157
158void TGLText::BBox(const char* string, float& llx, float& lly, float& llz,
159 float& urx, float& ury, float& urz)
160{
161 fGLTextFont->BBox(string, llx, lly, llz, urx, ury, urz);
162}
163
164////////////////////////////////////////////////////////////////////////////////
165/// Set the text rotation angles.
166
168{
169 fAngle1 = a1;
170 fAngle2 = a2;
171 fAngle3 = a3;
172}
173
174
175////////////////////////////////////////////////////////////////////////////////
176
178{
179 int fontid = fontnumber / 10;
180
181 const char *fontname=0;
182 if (fontid == 0) fontname = "arialbd.ttf";
183 if (fontid == 1) fontname = "timesi.ttf";
184 if (fontid == 2) fontname = "timesbd.ttf";
185 if (fontid == 3) fontname = "timesbi.ttf";
186 if (fontid == 4) fontname = "arial.ttf";
187 if (fontid == 5) fontname = "ariali.ttf";
188 if (fontid == 6) fontname = "arialbd.ttf";
189 if (fontid == 7) fontname = "arialbi.ttf";
190 if (fontid == 8) fontname = "cour.ttf";
191 if (fontid == 9) fontname = "couri.ttf";
192 if (fontid == 10) fontname = "courbd.ttf";
193 if (fontid == 11) fontname = "courbi.ttf";
194 if (fontid == 12) fontname = "symbol.ttf";
195 if (fontid == 13) fontname = "times.ttf";
196 if (fontid == 14) fontname = "wingding.ttf";
197
198 // try to load font (font must be in Root.TTFontPath resource)
199 const char *ttpath = gEnv->GetValue("Root.TTFontPath",
201 char *ttfont = gSystem->Which(ttpath, fontname, kReadPermission);
202
203 if (fGLTextFont) delete fGLTextFont;
204
205// fGLTextFont = new FTGLOutlineFont(ttfont);
206
207 fGLTextFont = new FTGLPolygonFont(ttfont);
208
209 if (!fGLTextFont->FaceSize(1))
210 Error("SetGLTextFont","Cannot set FTGL::FaceSize");
211 delete [] ttfont;
212}
short Font_t
Definition: RtypesCore.h:75
short Short_t
Definition: RtypesCore.h:35
double Double_t
Definition: RtypesCore.h:55
float Float_t
Definition: RtypesCore.h:53
#define ClassImp(name)
Definition: Rtypes.h:363
R__EXTERN TEnv * gEnv
Definition: TEnv.h:171
void Error(const char *location, const char *msgfmt,...)
@ kReadPermission
Definition: TSystem.h:48
R__EXTERN TSystem * gSystem
Definition: TSystem.h:540
virtual Float_t GetTextSize() const
Return the text size.
Definition: TAttText.h:36
virtual Color_t GetTextColor() const
Return the text color.
Definition: TAttText.h:34
Short_t fTextAlign
Text alignment.
Definition: TAttText.h:23
virtual Int_t GetValue(const char *name, Int_t dflt) const
Returns the integer value for a resource.
Definition: TEnv.cxx:491
GL Text.
Definition: TGLText.h:19
void PaintBBox(const char *text)
Definition: TGLText.cxx:143
void SetGLTextAngles(Double_t a1, Double_t a2, Double_t a3)
Set the text rotation angles.
Definition: TGLText.cxx:167
Double_t fY
Definition: TGLText.h:25
void PaintGLText(Double_t x, Double_t y, Double_t z, const char *text)
Draw text.
Definition: TGLText.cxx:96
TGLText()
Definition: TGLText.cxx:56
Double_t fAngle3
Definition: TGLText.h:29
Double_t fZ
Definition: TGLText.h:26
void BBox(const char *string, float &llx, float &lly, float &llz, float &urx, float &ury, float &urz)
Calculate bounding-box for given string.
Definition: TGLText.cxx:158
Double_t fX
Definition: TGLText.h:24
Double_t fAngle2
Definition: TGLText.h:28
Double_t fAngle1
Definition: TGLText.h:27
FTFont * fGLTextFont
Definition: TGLText.h:30
void SetGLTextFont(Font_t fontnumber)
Definition: TGLText.cxx:177
virtual ~TGLText()
Definition: TGLText.cxx:87
static void Color(const TGLColor &color)
Set color from TGLColor.
Definition: TGLUtil.cxx:1708
static const TString & GetTTFFontDir()
Get the fonts directory in the installation. Static utility function.
Definition: TROOT.cxx:3147
virtual char * Which(const char *search, const char *file, EAccessMode mode=kFileExists)
Find location of file in a search path.
Definition: TSystem.cxx:1536
TText * text
Double_t y[n]
Definition: legend1.C:17
Double_t x[n]
Definition: legend1.C:17
static constexpr double s