Developer Documentation
TrackballNode.hh
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41 
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45 
46 
47 //=============================================================================
48 //
49 // CLASS TrackballNode
50 //
51 //=============================================================================
52 
53 
54 #ifndef ACG_TRACKBALL_NODE_HH
55 #define ACG_TRACKBALL_NODE_HH
56 
57 
58 //== INCLUDES =================================================================
59 
60 // GMU
61 #include "BaseNode.hh"
62 #include "TransformNode.hh"
63 
64 // Qt
65 #include <QEvent>
66 #include <QMouseEvent>
67 
68 #ifdef max
69 # undef max
70 #endif
71 
72 #ifdef min
73 # undef min
74 #endif
75 
76 
77 
78 //== NAMESPACES ===============================================================
79 
80 
81 namespace ACG {
82 namespace SceneGraph {
83 
84 
85 //== CLASS DEFINITION =========================================================
86 
87 
96 class ACGDLLEXPORT TrackballNode : public TransformNode
97 {
98 public:
99 
100 
102  TrackballNode( BaseNode* _parent=0,
103  const std::string& _name="<TrackballNode>" )
104  : TransformNode(_parent, _name),
105  drawTrackball_(false),
106  drawAxes_(false),
107  radius_(1.0),
108  xAxis_(1.0, 0.0, 0.0),
109  yAxis_(0.0, 1.0, 0.0),
110  zAxis_(0.0, 0.0, 1.0)
111  {}
112 
113 
116 
117 
119  ACG_CLASSNAME(TrackballNode);
120 
121 
122  //
123  // METHODS
124  //
125 
126 
128  void set_radius(double _r) { radius_ = _r; }
130  double radius() const { return radius_; }
131 
132 
134  virtual void setIdentity() override{
135  Vec3d vec (1.0, 1.0, 1.0);
136 
137  vec = scale ().transform_point(vec);
138  radius_ *= vec.max ();
140  }
141 
142 
144  void set_draw_trackball(bool _b) { drawTrackball_ = _b; }
146  bool draw_trackball() const { return drawTrackball_; }
147 
148 
150  void set_draw_axes(bool _b) { drawAxes_ = _b; }
152  bool draw_axes() const { return drawAxes_; }
153 
154 
156  void draw(GLState& _state, const DrawModes::DrawMode& _drawMode) override;
157 
158 
160  virtual void mouseEvent(GLState& _state, QMouseEvent* _event) override;
161 
162 
163 private:
164 
166  bool mapToSphere(GLState& _state, const Vec2i& _v2, Vec3d& _v3);
167 
168 
169  // ELEMENTS
170  bool drawTrackball_,
171  drawAxes_;
172  double radius_;
173  Vec3d xAxis_, yAxis_, zAxis_;
174  Vec2i oldPoint2D_;
175 };
176 
177 
178 //=============================================================================
179 } // namespace SceneGraph
180 } // namespace ACG
181 //=============================================================================
182 #endif // ACG_TRACKBALL_NODE_HH defined
183 //=============================================================================
184 
double radius() const
Get trackball radius.
virtual void setIdentity() override
override TransformNode::setIdentity() (update radius_)
Namespace providing different geometric functions concerning angles.
void set_draw_trackball(bool _b)
Turn on/off drawing of the trackball.
Scalar max() const
return the maximal component
Definition: Vector11T.hh:517
void set_draw_axes(bool _b)
Turn drawing the axes on/off.
bool draw_axes() const
Is axes-drawing on?
bool draw_trackball() const
Is trackball-drawing on?
void set_radius(double _r)
Set trackball radius.
TrackballNode(BaseNode *_parent=0, const std::string &_name="<TrackballNode>")
Default constructor.