Developer Documentation
OSDTransformNode.cc
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41 
42 //================================================================
43 //
44 // CLASS OSDTransformNode - IMPLEMENTATION
45 //
46 //================================================================
47 
48 
49 //== INCLUDES ====================================================
50 
51 
52 #include "OSDTransformNode.hh"
53 
55 
56 
57 //== NAMESPACES ==================================================
58 
59 
60 namespace ACG {
61 namespace SceneGraph {
62 
63 
64 //== IMPLEMENTATION ==============================================
65 
66 
67 void OSDTransformNode::enterOSD( GLState &_state, const DrawModes::DrawMode &_drawMode )
68 {
69  _state.push_modelview_matrix();
70 
71  int left, bottom, width, height;
72  _state.get_viewport( left, bottom, width, height );
73 
74  double aspect = _state.aspect();
75 
76  _state.push_projection_matrix();
77  _state.reset_projection();
78 
79  _state.perspective( 45.0, aspect, 0.8, 20.0 );
80 
81  _state.push_modelview_matrix();
82  _state.reset_modelview();
83 
84  double posX = left + center_[0] * width;
85  double posY = bottom + center_[1] * height;
86 
87  ACG::Vec3d pos = _state.unproject( ACG::Vec3d( posX, posY, 0.1 ) );
88 
89  _state.pop_modelview_matrix();
90 
91  GLMatrixd modelview = _state.modelview();
92 
93  modelview(0,3) = 0.0;
94  modelview(1,3) = 0.0;
95  modelview(2,3) = 0.0;
96 
97  _state.set_modelview( modelview );
98  _state.translate( pos[0], pos[1], pos[2], MULT_FROM_LEFT );
99 }
100 
101 
102 //----------------------------------------------------------------
103 
104 
105 void OSDTransformNode::leaveOSD( GLState &_state, const DrawModes::DrawMode &_drawMode )
106 {
107  _state.pop_projection_matrix();
108  _state.pop_modelview_matrix();
109 }
110 
111 
112 //================================================================
113 
114 
115 } // namespace SceneGraph
116 } // namespace ACG
Namespace providing different geometric functions concerning angles.
GLMatrixT< double > GLMatrixd
typedef
Definition: GLMatrixT.hh:326
void translate(Scalar _x, Scalar _y, Scalar _z, MultiplyFrom _mult_from=MULT_FROM_RIGHT)
multiply self with translation matrix (x,y,z)