Developer Documentation
TriangleNode.hh
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50 
51 
52 
53 //=============================================================================
54 //
55 // CLASS TriangleNode
56 //
57 //=============================================================================
58 
59 #ifndef ACG_TRIANGLENODE_HH
60 #define ACG_TRIANGLENODE_HH
61 
62 //=============================================================================
63 
64 #include "BaseNode.hh"
65 
66 #include <vector>
67 
68 //=============================================================================
69 
70 namespace ACG {
71 namespace SceneGraph {
72 
73 //=============================================================================
74 
75 
76 class ACGDLLEXPORT TriangleNode : public BaseNode
77 {
78 
79 public:
80 
81  typedef std::vector<ACG::Vec3f> PointVector;
82 
83  TriangleNode( BaseNode* _parent=0,
84  std::string _name="<TriangleNode>" );
85  virtual ~TriangleNode();
86 
87  ACG_CLASSNAME(TriangleNode);
88 
89 
90  DrawModes::DrawMode availableDrawModes() const;
91 
92  void boundingBox(Vec3d& _bbMin, Vec3d& _bbMax);
93  void draw(GLState& _state, const DrawModes::DrawMode& _drawMode);
94  void pick(GLState& _state, PickTarget _target);
95 
96  void add_triangle( const ACG::Vec3f & _p0,
97  const ACG::Vec3f & _p1,
98  const ACG::Vec3f & _p2 )
99  {
100  point_.push_back( _p0 );
101  point_.push_back( _p1 );
102  point_.push_back( _p2 );
103 
104  ACG::Vec3f n = ( _p1 - _p0 ) % ( _p2 - _p1 );
105  if ( n.norm() > 0.00001 )
106  n.normalize();
107  else
108  n = Vec3f( 0, 0, 0 );
109  normal_.push_back( n );
110  }
111 
112  void clear()
113  {
114  point_.clear();
115  normal_.clear();
116  }
117 
118  size_t n_triangles() const { return point_.size() / 3; }
119 
120  void triangle( int _i,
121  ACG::Vec3f & _p0,
122  ACG::Vec3f & _p1,
123  ACG::Vec3f & _p2 ) const
124  {
125  _p0 = point_[ 3 * _i + 0 ];
126  _p1 = point_[ 3 * _i + 1 ];
127  _p2 = point_[ 3 * _i + 2 ];
128  }
129 
130 protected:
131 
132  enum FaceMode { FACE_NORMALS, FACE_COLORS, PER_VERTEX };
133 
134  void draw_vertices();
135  void draw_faces();
136  void draw_wireframe();
137 
138  PointVector point_;
139  PointVector normal_;
140 
141 };
142 
143 
144 //=============================================================================
145 } // namespace SceneGraph
146 } // namespace ACG
147 //=============================================================================
148 #endif // ACG_TRIMESHNODE_HH defined
149 //=============================================================================
PickTarget
What target to use for picking.
Definition: BaseNode.hh:99
VectorT< float, 3 > Vec3f
Definition: VectorT.hh:125
Namespace providing different geometric functions concerning angles.
Definition: DBSCANT.cc:51
auto normalize() -> decltype(*this/=std::declval< VectorT< S, DIM >>().norm())
Definition: Vector11T.hh:428
auto norm() const -> decltype(std::sqrt(std::declval< VectorT< S, DIM >>().sqrnorm()))
compute euclidean norm
Definition: Vector11T.hh:408