1 // File: SketchSolver_ConstraintManager.h
2 // Created: 08 May 2014
3 // Author: Artem ZHIDKOV
5 #ifndef SketchSolver_ConstraintManager_Headerfile
6 #define SketchSolver_ConstraintManager_Headerfile
8 #include "SketchSolver.h"
9 #include <SketchSolver_Solver.h>
11 #include <Events_Listener.h>
12 #include <SketchPlugin_Constraint.h>
23 /** \class SketchSolver_ConstraintManager
25 * \brief Listens the changes of SketchPlugin features and transforms the Constraint
26 * feature into the format understandable by SolveSpace library.
28 * Constraints created for SolveSpace library are divided into the groups.
29 * The division order based on connectedness of the features by the constraints.
30 * The groups may be fused or separated according to the new constraints.
32 * \remark This is a singleton.
34 class SketchSolver_ConstraintManager : public Events_Listener
37 /** \brief Main method to create constraint manager
38 * \return pointer to the singleton
40 static SketchSolver_ConstraintManager* Instance();
42 /** \brief Implementation of Event Listener method
43 * \param[in] theMessage the data of the event
45 virtual void processEvent(const Events_Message* theMessage);
48 SketchSolver_ConstraintManager();
49 ~SketchSolver_ConstraintManager();
51 /** \brief Adds or updates a constraint in the suitable group
52 * \param[in] theConstraint constraint to be changed
53 * \return \c true if the constraint changed successfully
55 bool changeConstraint(boost::shared_ptr<SketchPlugin_Constraint> theConstraint);
57 /** \brief Removes a constraint from the manager
58 * \param[in] theConstraint constraint to be removed
59 * \return \c true if the constraint removed successfully
61 bool removeConstraint(boost::shared_ptr<SketchPlugin_Constraint> theConstraint);
63 /** \brief Adds or updates a workplane in the manager
64 * \param[in] theSketch the feature to create or update workplane
65 * \return \c true if the workplane changed successfully
66 * \remark Type of theSketch is not verified inside
68 bool changeWorkplane(boost::shared_ptr<SketchPlugin_Feature> theSketch);
70 /** \brief Removes a workplane from the manager.
71 * All groups based on such workplane will be removed too.
72 * \param[in] theSketch the feature to be removed
73 * \return \c true if the workplane removed successfully
75 bool removeWorkplane(boost::shared_ptr<SketchPlugin_Sketch> theSketch);
77 /** \brief Updates entity which is neither workplane nor constraint
78 * \param[in] theFeature entity to be updated
80 void updateEntity(boost::shared_ptr<SketchPlugin_Feature> theFeature);
82 /** \brief Goes through the list of groups and solve the constraints
84 void resolveConstraints();
87 class SketchSolver_ConstraintGroup;
89 /** \brief Searches list of groups which interact with specified constraint
90 * \param[in] theConstraint constraint to be found
91 * \param[out] theGroups list of group indexes interacted with constraint
93 void findGroups(boost::shared_ptr<SketchPlugin_Constraint> theConstraint,
94 std::set<Slvs_hGroup>& theGroupIDs) const;
96 /** \brief Searches in the list of groups the workplane which constains specified constraint
97 * \param[in] theConstraint constraint to be found
98 * \return workplane containing the constraint
100 boost::shared_ptr<SketchPlugin_Feature> findWorkplaneForConstraint(
101 boost::shared_ptr<SketchPlugin_Constraint> theConstraint) const;
104 static SketchSolver_ConstraintManager* _self; ///< Self pointer to implement singleton functionality
105 std::vector<SketchSolver_ConstraintGroup*> myGroups; ///< Groups of constraints
109 /** \class SketchSolver_ConstraintGroup
111 * \brief Keeps the group of constraints which based on the same entities
113 class SketchSolver_ConstraintManager::SketchSolver_ConstraintGroup
116 /** \brief New group based on specified workplane.
117 * Throws an exception if theWorkplane is not an object of SketchPlugin_Sketch type
118 * \remark Type of theSketch is not verified inside
120 SketchSolver_ConstraintGroup(boost::shared_ptr<SketchPlugin_Feature> theWorkplane);
122 ~SketchSolver_ConstraintGroup();
124 /// \brief Returns group's unique identifier
125 inline const Slvs_hGroup& getId() const
128 /// \brief Returns true if the group has no constraints yet
129 inline bool isEmpty() const
130 {return myConstraints.empty();}
132 /** \brief Adds or updates a constraint in the group
133 * \param[in] theConstraint constraint to be changed
134 * \return \c true if the constraint added or updated successfully
136 bool changeConstraint(boost::shared_ptr<SketchPlugin_Constraint> theConstraint);
138 /** \brief Verifies the constraint uses the objects from this group
139 * \param[in] theConstraint constraint for verification of interaction
140 * \return \c true if the constrained objects are used in current group
142 bool isInteract(boost::shared_ptr<SketchPlugin_Constraint> theConstraint) const;
144 /** \brief Verifies the specified feature is equal to the base workplane for this group
145 * \param[in] theWorkplane the feature to be compared with base workplane
146 * \return \c true if workplanes are the same
148 bool isBaseWorkplane(boost::shared_ptr<SketchPlugin_Feature> theWorkplane) const;
150 boost::shared_ptr<SketchPlugin_Feature> getWorkplane() const
153 /** \brief Update parameters of workplane. Should be called when Update event is coming.
154 * \return \c true if workplane updated successfully, \c false if workplane parameters are not consistent
156 bool updateWorkplane();
158 /** \brief If the entity is in this group it will updated
159 * \param[in] theEntity attribute, which values should update SolveSpace entity
161 void updateEntityIfPossible(boost::shared_ptr<ModelAPI_Attribute> theEntity);
163 /** \brief Searches invalid features and constraints in the group and avoids them
164 * \return \c true if the group's sketch is invalid and the group should be removed
168 /** \brief Add specified group to this one
169 * \param[in] theGroup group of constraint to be added
171 void mergeGroups(const SketchSolver_ConstraintGroup& theGroup);
173 /** \brief Start solution procedure if necessary and update attributes of features
175 void resolveConstraints();
178 /** \brief Adds or updates an entity in the group
180 * The parameters of entity will be parsed and added to the list of SolveSpace parameters.
181 * Parameters of certain entity will be placed sequentially in the list.
183 * \param[in] theEntity the object of constraint
184 * \return identifier of changed entity or 0 if entity could not be changed
186 Slvs_hEntity changeEntity(boost::shared_ptr<ModelAPI_Attribute> theEntity);
188 /** \brief Adds or updates a normal in the group
190 * Normal is a special entity in SolveSpace, which defines a direction in 3D and
191 * a rotation about this direction. So, SolveSpace represents normals as unit quaternions.
193 * To define a normal there should be specified two coordinate axis
194 * on the plane transversed to created normal.
196 * \param[in] theDirX first coordinate axis of the plane
197 * \param[in] theDirY second coordinate axis of the plane
198 * \param[in] theNorm attribute for the normal (used to identify newly created entity)
199 * \return identifier of created or updated normal
201 Slvs_hEntity changeNormal(boost::shared_ptr<ModelAPI_Attribute> theDirX,
202 boost::shared_ptr<ModelAPI_Attribute> theDirY,
203 boost::shared_ptr<ModelAPI_Attribute> theNorm);
205 /** \brief Adds or updates a parameter in the group
206 * \param[in] theParam the value of parameter
207 * \param[in] thePrmIter the cell in the list of parameters which should be changed
208 * (the iterator will be increased if it does not reach the end of the list)
209 * \return identifier of changed parameter; when the parameter cannot be created, returned ID is 0
211 Slvs_hParam changeParameter(const double& theParam,
212 std::vector<Slvs_Param>::const_iterator& thePrmIter);
214 /** \brief Change values of attribute by parameters received from SolveSpace solver
215 * \param[in,out] theAttribute pointer to the attribute to be changed
216 * \param[in] theEntityID identifier of SolveSpace entity, which contains updated data
218 void updateAttribute(boost::shared_ptr<ModelAPI_Attribute> theAttribute, const Slvs_hEntity& theEntityID);
220 /** \brief Adds a constraint for a point which should not be changed during computations
221 * \param[in] theEntity the base for the constraint
223 void addTemporaryConstraintWhereDragged(boost::shared_ptr<ModelAPI_Attribute> theEntity);
225 /** \brief Remove all temporary constraint after computation finished
227 void removeTemporaryConstraints();
230 /** \brief Creates a workplane from the sketch parameters
231 * \param[in] theSketch parameters of workplane are the attributes of this sketch
232 * \return \c true if success, \c false if workplane parameters are not consistent
234 bool addWorkplane(boost::shared_ptr<SketchPlugin_Feature> theSketch);
237 // SolveSpace entities
238 Slvs_hGroup myID; ///< the index of the group
239 Slvs_Entity myWorkplane; ///< Workplane for the current group
240 std::vector<Slvs_Param> myParams; ///< List of parameters of the constraints
241 Slvs_hParam myParamMaxID; ///< Actual maximal ID of parameters (not equal to myParams size)
242 std::vector<Slvs_Entity> myEntities; ///< List of entities of the constaints
243 Slvs_hEntity myEntityMaxID; ///< Actual maximal ID of entities (not equal to myEntities size)
244 std::vector<Slvs_Constraint> myConstraints; ///< List of constraints in SolveSpace format
245 Slvs_hConstraint myConstrMaxID; ///< Actual maximal ID of constraints (not equal to myConstraints size)
246 bool myNeedToSolve; ///< Indicator that something changed in the group and constraint system need to be rebuilt
248 SketchSolver_Solver myConstrSolver; ///< Solver for set of equations obtained by constraints
250 // SketchPlugin entities
251 boost::shared_ptr<SketchPlugin_Feature> mySketch; ///< Equivalent to workplane
252 std::map<boost::shared_ptr<SketchPlugin_Constraint>, Slvs_hConstraint>
253 myConstraintMap; ///< The map between SketchPlugin and SolveSpace constraints
254 std::list<Slvs_hConstraint> myTempConstraints; ///< The list of identifiers of temporary constraints
255 std::map<boost::shared_ptr<ModelAPI_Attribute>, Slvs_hEntity>
256 myEntityMap; ///< The map between parameters of constraints and their equivalent SolveSpace entities