Developer Documentation

PolyLineBezierSplineData.cc
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40 \*===========================================================================*/
41
42
43
44 //=============================================================================
45 //
46 // CLASS PolyLineCircleData - IMPLEMENTATION
47 //
48 //=============================================================================
49
50
51 //== INCLUDES =================================================================
52
53 #include "PolyLineBezierSplineData.hh"
54
55 PolyLineBezierSplineData::PolyLineBezierSplineData(unsigned int _meshIndex)
56 : meshIndex_(_meshIndex)
57 {
58 }
59
60 void PolyLineBezierSplineData::addInterpolatePoint(ACG::Vec3d _position, ACG::Vec3d _normal)
61 {
62 InterpolatePoint p;
63 p.position = _position;
64 p.normal = _normal;
65
66 points_.push_back(p);
67 }
68
69 bool PolyLineBezierSplineData::finishSpline()
70 {
71 if(points_.size() < 2)
72 return false;
73
74 handles_.clear();
75
76 for(unsigned int i = 0; i + 1 < points_.size(); i++) {
77
78 const ACG::Vec3d firstPoint = points_[i].position, sndPoint = points_[i + 1].position;
79 double r = (firstPoint - sndPoint).norm() / 4.0;
80 const ACG::Vec3d dir = sndPoint - firstPoint;
81 const ACG::Vec3d ort0 = dir % points_[i].normal, ort1 = dir % points_[i + 1].normal;
82 ACG::Vec3d f0 = ort0 % points_[i].normal, f1 = ort1 % points_[i + 1].normal;
83
84 ACG::Vec3d near = firstPoint - f0.normalize() * r,
85 far = sndPoint + f1.normalize() * r;
86
87 handles_.push_back(near);
88 handles_.push_back(far);
89
90 }
91
92 //handles will be degenerate up to now
93 for(unsigned int i = 1; i + 1 < handles_.size(); i += 2) {
94
95 const ACG::Vec3d dir = (handles_[i + 1] - handles_[i]) / 2.0;
96
97 InterpolatePoint& p = getInterpolatePoint(i);
98 handles_[i + 1] = p.position + dir;
99 handles_[i] = p.position - dir;
100 }
101
102 return true;
103 }
104
105 PolyLineBezierSplineData::InterpolatePoint& PolyLineBezierSplineData::getInterpolatePoint(unsigned int _handleIndex)
106 {
107 if(!_handleIndex)
108 return points_[0];
109 else if(_handleIndex == handles_.size())
110 return points_.back();
111 else return points_[(_handleIndex - 1) / 2 + 1];
112 }
PolyLineBezierSplineData::PolyLineBezierSplineData
PolyLineBezierSplineData(unsigned int _meshIndex)
Creates a new PolyLineBezierSplineData object with no points.
Definition: PolyLineBezierSplineData.cc:55
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:60
OpenMesh::VectorT
Definition: Vector11T.hh:83
PolyLineBezierSplineData::getInterpolatePoint
InterpolatePoint & getInterpolatePoint(unsigned int _handleIndex)
Retrieves the interpolate point based on the handle.
Definition: PolyLineBezierSplineData.cc:105
PolyLineBezierSplineData::InterpolatePoint
Definition: PolyLineBezierSplineData.hh:58
OpenMesh::VectorT::normalize
auto normalize() -> decltype(*this/=std::declval< VectorT< S, DIM >>().norm())
Definition: Vector11T.hh:434
PolyLineBezierSplineData::finishSpline
bool finishSpline()
If possible calculates handles.
Definition: PolyLineBezierSplineData.cc:69