1 // Copyright (C) 2012-2019 The VPaint Developers. 2 // See the COPYRIGHT file at the top-level directory of this distribution 3 // and at https://github.com/dalboris/vpaint/blob/master/COPYRIGHT 4 // 5 // Licensed under the Apache License, Version 2.0 (the "License"); 6 // you may not use this file except in compliance with the License. 7 // You may obtain a copy of the License at 8 // 9 // http://www.apache.org/licenses/LICENSE-2.0 10 // 11 // Unless required by applicable law or agreed to in writing, software 12 // distributed under the License is distributed on an "AS IS" BASIS, 13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 // See the License for the specific language governing permissions and 15 // limitations under the License. 16 17 #ifndef INSTANTLOOP_H 18 #define INSTANTLOOP_H 19 20 #include "../TimeDef.h" 21 22 #include <QList> 23 #include "KeyHalfedge.h" 24 25 ////////////// Forward declare global serialization operators ///////////////// 26 27 namespace VectorAnimationComplex { class ProperCycle; } 28 QTextStream & operator<<(QTextStream &, const VectorAnimationComplex::ProperCycle &); 29 QTextStream & operator>>(QTextStream &, VectorAnimationComplex::ProperCycle &); 30 31 /////////////////////////////////////////////////////////////////////////////// 32 33 namespace VectorAnimationComplex 34 { 35 // A proper path is either a list of n>1 consecutive open halfeges satisfying: 36 // * no repeated halfedge 37 // * startVertex() == endVertex() 38 // Or a single closed halfedge 39 class ProperCycle 40 { 41 public: 42 // invalid loop 43 ProperCycle(); 44 45 // edges: unsorted set of instant edges 46 ProperCycle(const KeyEdgeSet & edgeSet); 47 48 bool isValid() const; 49 50 // all methods below assume that the loop is valid 51 Time time() const; 52 int size() const; 53 KeyHalfedge operator[](int i) const; 54 55 // serialization and copy 56 void remapPointers(VAC * newVAC); 57 friend QTextStream & ::operator<<(QTextStream & out, const ProperCycle & loop); 58 friend QTextStream & ::operator>>(QTextStream & in, ProperCycle & loop); 59 void convertTempIdsToPointers(VAC * vac); 60 61 // Replace pointed edges 62 void replaceEdges(KeyEdge * oldEdge, const KeyEdgeList & newEdges); 63 64 private: 65 // sorted list of instant edges, guaranted to share the same time 66 QList<KeyHalfedge> halfedges_; 67 }; 68 69 } // end namespace VectorAnimationComplex 70 71 #endif // INSTANTLOOP_H 72