Developer Documentation
TriangleNode.hh
1 /*===========================================================================*\
2  * *
3  * OpenFlipper *
4  * Copyright (c) 2001-2015, RWTH-Aachen University *
5  * Department of Computer Graphics and Multimedia *
6  * All rights reserved. *
7  * www.openflipper.org *
8  * *
9  *---------------------------------------------------------------------------*
10  * This file is part of OpenFlipper. *
11  *---------------------------------------------------------------------------*
12  * *
13  * Redistribution and use in source and binary forms, with or without *
14  * modification, are permitted provided that the following conditions *
15  * are met: *
16  * *
17  * 1. Redistributions of source code must retain the above copyright notice, *
18  * this list of conditions and the following disclaimer. *
19  * *
20  * 2. Redistributions in binary form must reproduce the above copyright *
21  * notice, this list of conditions and the following disclaimer in the *
22  * documentation and/or other materials provided with the distribution. *
23  * *
24  * 3. Neither the name of the copyright holder nor the names of its *
25  * contributors may be used to endorse or promote products derived from *
26  * this software without specific prior written permission. *
27  * *
28  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS *
29  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED *
30  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A *
31  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER *
32  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, *
33  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, *
34  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR *
35  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF *
36  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING *
37  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS *
38  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
39  * *
40 \*===========================================================================*/
41 
42 
43 
44 
45 
46 
47 //=============================================================================
48 //
49 // CLASS TriangleNode
50 //
51 //=============================================================================
52 
53 #ifndef ACG_TRIANGLENODE_HH
54 #define ACG_TRIANGLENODE_HH
55 
56 //=============================================================================
57 
58 #include "BaseNode.hh"
59 
60 #include <vector>
61 
62 //=============================================================================
63 
64 namespace ACG {
65 namespace SceneGraph {
66 
67 //=============================================================================
68 
69 
70 class ACGDLLEXPORT TriangleNode : public BaseNode
71 {
72 
73 public:
74 
75  typedef std::vector<ACG::Vec3f> PointVector;
76 
77  TriangleNode( BaseNode* _parent=0,
78  const std::string& _name="<TriangleNode>" );
79  virtual ~TriangleNode();
80 
81  ACG_CLASSNAME(TriangleNode);
82 
83 
84  DrawModes::DrawMode availableDrawModes() const;
85 
86  void boundingBox(Vec3d& _bbMin, Vec3d& _bbMax);
87  void draw(GLState& _state, const DrawModes::DrawMode& _drawMode);
88  void pick(GLState& _state, PickTarget _target);
89 
90  void add_triangle( const ACG::Vec3f & _p0,
91  const ACG::Vec3f & _p1,
92  const ACG::Vec3f & _p2 )
93  {
94  point_.push_back( _p0 );
95  point_.push_back( _p1 );
96  point_.push_back( _p2 );
97 
98  ACG::Vec3f n = ( _p1 - _p0 ) % ( _p2 - _p1 );
99  if ( n.norm() > 0.00001 )
100  n.normalize();
101  else
102  n = Vec3f( 0, 0, 0 );
103  normal_.push_back( n );
104  }
105 
106  void clear()
107  {
108  point_.clear();
109  normal_.clear();
110  }
111 
112  size_t n_triangles() const { return point_.size() / 3; }
113 
114  void triangle( int _i,
115  ACG::Vec3f & _p0,
116  ACG::Vec3f & _p1,
117  ACG::Vec3f & _p2 ) const
118  {
119  _p0 = point_[ 3 * _i + 0 ];
120  _p1 = point_[ 3 * _i + 1 ];
121  _p2 = point_[ 3 * _i + 2 ];
122  }
123 
124 protected:
125 
126  enum FaceMode { FACE_NORMALS, FACE_COLORS, PER_VERTEX };
127 
128  void draw_vertices();
129  void draw_faces();
130  void draw_wireframe();
131 
132  PointVector point_;
133  PointVector normal_;
134 
135 };
136 
137 
138 //=============================================================================
139 } // namespace SceneGraph
140 } // namespace ACG
141 //=============================================================================
142 #endif // ACG_TRIMESHNODE_HH defined
143 //=============================================================================
Namespace providing different geometric functions concerning angles.
auto norm() const -> decltype(std::sqrt(std::declval< VectorT< S, DIM >>().sqrnorm()))
compute euclidean norm
Definition: Vector11T.hh:409
VectorT< float, 3 > Vec3f
Definition: VectorT.hh:119
auto normalize() -> decltype(*this/=std::declval< VectorT< S, DIM >>().norm())
Definition: Vector11T.hh:429
PickTarget
What target to use for picking.
Definition: PickTarget.hh:73