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PolyLineBezierSplineData.cc
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50 //=============================================================================
51 //
52 // CLASS PolyLineCircleData - IMPLEMENTATION
53 //
54 //=============================================================================
55 
56 
57 //== INCLUDES =================================================================
58 
59 #include "PolyLineBezierSplineData.hh"
60 
62 : meshIndex_(_meshIndex)
63 {
64 }
65 
67 {
69  p.position = _position;
70  p.normal = _normal;
71 
72  points_.push_back(p);
73 }
74 
76 {
77  if(points_.size() < 2)
78  return false;
79 
80  handles_.clear();
81 
82  for(unsigned int i = 0; i + 1 < points_.size(); i++) {
83 
84  const ACG::Vec3d firstPoint = points_[i].position, sndPoint = points_[i + 1].position;
85  double r = (firstPoint - sndPoint).norm() / 4.0;
86  const ACG::Vec3d dir = sndPoint - firstPoint;
87  const ACG::Vec3d ort0 = dir % points_[i].normal, ort1 = dir % points_[i + 1].normal;
88  ACG::Vec3d f0 = ort0 % points_[i].normal, f1 = ort1 % points_[i + 1].normal;
89 
90  ACG::Vec3d near = firstPoint - f0.normalize() * r,
91  far = sndPoint + f1.normalize() * r;
92 
93  handles_.push_back(near);
94  handles_.push_back(far);
95 
96  }
97 
98  //handles will be degenerate up to now
99  for(unsigned int i = 1; i + 1 < handles_.size(); i += 2) {
100 
101  const ACG::Vec3d dir = (handles_[i + 1] - handles_[i]) / 2.0;
102 
104  handles_[i + 1] = p.position + dir;
105  handles_[i] = p.position - dir;
106  }
107 
108  return true;
109 }
110 
112 {
113  if(!_handleIndex)
114  return points_[0];
115  else if(_handleIndex == handles_.size())
116  return points_.back();
117  else return points_[(_handleIndex - 1) / 2 + 1];
118 }
void addInterpolatePoint(ACG::Vec3d _position, ACG::Vec3d _normal)
Adds a point to the end of the list and inserts control points.
InterpolatePoint & getInterpolatePoint(unsigned int _handleIndex)
Retrieves the interpolate point based on the handle.
PolyLineBezierSplineData(unsigned int _meshIndex)
Creates a new PolyLineBezierSplineData object with no points.
bool finishSpline()
If possible calculates handles.