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KnotvectorT.cc
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48 \*===========================================================================*/
49
50
51 //=============================================================================
52 //
53 // CLASS KnotvectorT - IMPLEMENTATION
54 // Author: Ellen Dekkers <dekkers@cs.rwth-aachen.de>
55 //
56 //=============================================================================
57
58
59 #define ACG_KNOTVECTORT_C
60
61 #include "KnotvectorT.hh"
62
63 namespace ACG {
64
65 template < typename Scalar >
66 KnotvectorT<Scalar>::
67 KnotvectorT()
68 : ref_count_selections_(0)
69 {
70 knotvectorType_ = UNIFORM_INTERPOL;
71 }
72
73 //-----------------------------------------------------------------------------
74
75 template < typename Scalar >
76 KnotvectorT<Scalar>::
77 KnotvectorT( const KnotvectorT& _knotvec )
78 {
79 knots_ = _knotvec.knots_;
80
81 // properties
82 selections_ = _knotvec.selections_;
83
84 // property reference counter
85 ref_count_selections_ = _knotvec.ref_count_selections_;
86
87 knotvectorType_ = _knotvec.knotvectorType_;
88
89 num_control_points_ = _knotvec.num_control_points_;
90 spline_degree_ = _knotvec.spline_degree_;
91 }
92
93 //-----------------------------------------------------------------------------
94
95 template< typename Scalar >
96 KnotvectorT<Scalar>::
97 ~KnotvectorT()
98 {
99 }
100
101 //-----------------------------------------------------------------------------
102
103 template <typename Scalar >
104 void
105 KnotvectorT<Scalar>::
106 setType(KnotvectorType _type)
107 {
108 knotvectorType_ = _type;
109
110 if ( (spline_degree_ != 0) && (num_control_points_ != 0))
111 createKnots(spline_degree_, num_control_points_);
112 }
113
114 //-----------------------------------------------------------------------------
115
116 template <typename Scalar >
117 void
118 KnotvectorT<Scalar>::
119 createKnots(unsigned int _splineDeg, unsigned int _dim)
120 {
121 num_control_points_ = _dim;
122 spline_degree_ = _splineDeg;
123
124 if (knotvectorType_ == UNIFORM)
125 createUniformKnots(_splineDeg, _dim);
126 else if (knotvectorType_ == UNIFORM_INTERPOL)
127 createUniformInterpolatingKnots(_splineDeg, _dim);
128 };
129
130 //-----------------------------------------------------------------------------
131
132 template <typename Scalar >
133 void
134 KnotvectorT<Scalar>::
135 addKnot(Scalar _knot)
136 {
137 knots_.push_back(_knot);
138
139 // add available property
140 if( selections_available())
141 selections_.push_back( false);
142 }
143
144 //-----------------------------------------------------------------------------
145
146 template <typename Scalar >
147 void
148 KnotvectorT<Scalar>::
149 insertKnot(unsigned int _index, const Scalar _knot)
150 {
151 assert(_index < knots_.size());
152 knots_.insert(knots_.begin()+_index, _knot);
153
154 // add available property
155 if( selections_available())
156 selections_.insert(selections_.begin()+_index, false);
157 }
158
159 //-----------------------------------------------------------------------------
160
161 template< typename Scalar >
162 void
163 KnotvectorT<Scalar>::
164 deleteKnot(unsigned int _index)
165 {
166 assert(_index < knots_.size());
167 knots_.erase(knots_.begin()+_index);
168
169 if( selections_available())
170 selections_.erase(selections_.begin()+_index);
171 }
172
173 //-----------------------------------------------------------------------------
174
175 template< typename Scalar >
176 void
177 KnotvectorT<Scalar>::
178 setKnotvector(const std::vector< Scalar >& _knots)
179 {
180 knots_ = _knots;
181
182 selections_.clear();
183 if( selections_available())
184 selections_.resize(knots_.size(), false);
185 }
186
187
188 //-----------------------------------------------------------------------------
189
190
191 template< typename Scalar >
192 void
193 KnotvectorT<Scalar>::
194 createUniformInterpolatingKnots(unsigned int _splineDeg, unsigned int _dim)
195 {
196 knots_.clear();
197
198 float last=0.0;
199
200 for (unsigned int i = 0; i < _splineDeg; i++)
201 knots_.push_back(0); // p+1
202
203 for (int i = 0; i < (int)_dim - (int)_splineDeg + 1; i++) {
204 knots_.push_back(i);
205 last=i;
206 }
207
208 for (unsigned int i = 0; i < _splineDeg; i++)
209 knots_.push_back(last); // p+1
210
211 selections_.clear();
212 if( selections_available())
213 selections_.resize(knots_.size(), false);
214
215 // std::cout << "Added " << knots_.size() << " interpolating knots (deg = " << p << ", dim = " << n+1 << ")" << std::endl;
216 // for (unsigned int i = 0; i < knots_.size(); ++i)
217 // std::cout << knots_[i] << ", " << std::flush;
218 // std::cout << std::endl;
219 }
220
221 //-----------------------------------------------------------------------------
222
223 template< typename Scalar >
224 void
225 KnotvectorT<Scalar>::
226 createUniformKnots(unsigned int _splineDeg, unsigned int _dim)
227 {
228 knots_.clear();
229
230 // number of required knots
231 int k = _dim + _splineDeg + 1;
232
233 for ( int i = 0; i < k; ++i )
234 knots_.push_back(i);
235
236 selections_.clear();
237 if( selections_available())
238 selections_.resize(knots_.size(), false);
239
240 // std::cout << "Added " << knots_.size() << " uniform knots (deg = " << _splineDeg << ", dim = " << _dim << ")" << std::endl;
241 // for (unsigned int i = 0; i < knots_.size(); ++i)
242 // std::cout << knots_[i] << ", " << std::flush;
243 // std::cout << std::endl;
244 }
245
246
247 //-----------------------------------------------------------------------------
248
249
250 template< typename Scalar >
251 template <class PropT>
252 void
253 KnotvectorT<Scalar>::
254 request_prop( unsigned int& _ref_count, PropT& _prop)
255 {
256 if(_ref_count == 0)
257 {
258 _ref_count = 1;
259 _prop.resize(size());
260 }
261 else ++_ref_count;
262 }
263
264
265 //-----------------------------------------------------------------------------
266
267 template< typename Scalar >
268 template <class PropT>
269 void
270 KnotvectorT<Scalar>::
271 release_prop( unsigned int& _ref_count, PropT& _prop)
272 {
273 if( _ref_count <= 1)
274 {
275 _ref_count = 0;
276 _prop.clear();
277 }
278 else --_ref_count;
279 }
280
281
282 }
ACG
Namespace providing different geometric functions concerning angles.
Definition: DBSCANT.cc:51
ACG::KnotvectorT::~KnotvectorT
~KnotvectorT()
Destructor.
Definition: KnotvectorT.cc:97
ACG::KnotvectorT
Definition: KnotvectorT.hh:84
ACG::KnotvectorT::KnotvectorT
KnotvectorT()
Constructor.
Definition: KnotvectorT.cc:67