Developer Documentation
gltext.cc
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49 
50 
51 //=============================================================================
52 
53 
54 //== INCLUDES =================================================================
55 
56 #include "gltext.hh"
57 #include <ACG/Math/GLMatrixT.hh>
58 
59 //=============================================================================
60 
61 namespace ACG {
62 
63 //=============================================================================
64 
65 
66 void glText(const Vec3f& _pos,
67  const std::string& _text,
68  void* _font)
69 {
70  glRasterPos3fv(_pos.data());
71 
72  std::string::const_iterator s_it(_text.begin()), s_end(_text.end());
73  for (; s_it!=s_end; ++s_it)
74  glutBitmapCharacter(_font, *s_it);
75 }
76 
77 
78 //-----------------------------------------------------------------------------
79 
80 
81 void glText( const Vec2i& _pos,
82  const std::string& _text,
83  void* _font)
84 {
85  GLint viewport[4];
86  glGetIntegerv(GL_VIEWPORT, viewport);
87 
88  // set raster pos
89  glMatrixMode(GL_PROJECTION);
90  glPushMatrix();
91  GLMatrixf orthoProj;
92  orthoProj.identity();
93  orthoProj.ortho(0.0f, float(viewport[2]), 0.0f, float(viewport[3]), -1.0f, 1.0f);
94  glLoadMatrixf(orthoProj.data());
95 
96 
97  glMatrixMode(GL_MODELVIEW);
98  glPushMatrix();
99  glLoadIdentity();
100  glRasterPos2i(_pos[0], _pos[1]);
101 
102 
103  // draw characters
104  std::string::const_iterator s_it(_text.begin()), s_end(_text.end());
105  for (; s_it!=s_end; ++s_it)
106  glutBitmapCharacter(_font, *s_it);
107 
108 
109  // restore matrices
110  glMatrixMode(GL_PROJECTION);
111  glPopMatrix();
112  glMatrixMode(GL_MODELVIEW);
113  glPopMatrix();
114 }
115 
116 
117 //=============================================================================
118 } // namespace ACG
119 //=============================================================================
void identity()
setup an identity matrix
Definition: Matrix4x4T.cc:256
Namespace providing different geometric functions concerning angles.
Definition: DBSCANT.cc:51
void ortho(Scalar left, Scalar right, Scalar bottom, Scalar top, Scalar near_plane, Scalar far_plane)
multiply self with orthographic projection matrix
Definition: GLMatrixT.cc:379
void glText(const Vec3f &_pos, const std::string &_text, void *_font)
Text output in OpenGL, given 3D text position.
Definition: gltext.cc:66
Scalar * data()
access to Scalar array
Definition: Vector11T.hh:193