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PolyLineBezierSplineData.cc
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48 \*===========================================================================*/
49
50 //=============================================================================
51 //
52 // CLASS PolyLineCircleData - IMPLEMENTATION
53 //
54 //=============================================================================
55
56
57 //== INCLUDES =================================================================
58
59 #include "PolyLineBezierSplineData.hh"
60
61 PolyLineBezierSplineData::PolyLineBezierSplineData(unsigned int _meshIndex)
62 : meshIndex_(_meshIndex)
63 {
64 }
65
66 void PolyLineBezierSplineData::addInterpolatePoint(ACG::Vec3d _position, ACG::Vec3d _normal)
67 {
68 InterpolatePoint p;
69 p.position = _position;
70 p.normal = _normal;
71
72 points_.push_back(p);
73 }
74
75 bool PolyLineBezierSplineData::finishSpline()
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
103 InterpolatePoint& p = getInterpolatePoint(i);
104 handles_[i + 1] = p.position + dir;
105 handles_[i] = p.position - dir;
106 }
107
108 return true;
109 }
110
111 PolyLineBezierSplineData::InterpolatePoint& PolyLineBezierSplineData::getInterpolatePoint(unsigned int _handleIndex)
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 }
PolyLineBezierSplineData::addInterpolatePoint
void addInterpolatePoint(ACG::Vec3d _position, ACG::Vec3d _normal)
Adds a point to the end of the list and inserts control points.
Definition: PolyLineBezierSplineData.cc:66
PolyLineBezierSplineData::getInterpolatePoint
InterpolatePoint & getInterpolatePoint(unsigned int _handleIndex)
Retrieves the interpolate point based on the handle.
Definition: PolyLineBezierSplineData.cc:111
PolyLineBezierSplineData::PolyLineBezierSplineData
PolyLineBezierSplineData(unsigned int _meshIndex)
Creates a new PolyLineBezierSplineData object with no points.
Definition: PolyLineBezierSplineData.cc:61
OpenMesh::VectorT
Definition: Vector11T.hh:83
PolyLineBezierSplineData::finishSpline
bool finishSpline()
If possible calculates handles.
Definition: PolyLineBezierSplineData.cc:75
PolyLineBezierSplineData::InterpolatePoint
Definition: PolyLineBezierSplineData.hh:64