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>
22 // Unknown constraint (for error reporting)
23 #define SLVS_C_UNKNOWN 0
25 #define SLVS_E_UNKNOWN 0
27 /** \class SketchSolver_ConstraintManager
29 * \brief Listens the changes of SketchPlugin features and transforms the Constraint
30 * feature into the format understandable by SolveSpace library.
32 * Constraints created for SolveSpace library are divided into the groups.
33 * The division order based on connectedness of the features by the constraints.
34 * The groups may be fused or separated according to the new constraints.
36 * \remark This is a singleton.
38 class SketchSolver_ConstraintManager : public Events_Listener
41 /** \brief Main method to create constraint manager
42 * \return pointer to the singleton
44 static SketchSolver_ConstraintManager* Instance();
46 /** \brief Implementation of Event Listener method
47 * \param[in] theMessage the data of the event
49 virtual void processEvent(const Events_Message* theMessage);
52 SketchSolver_ConstraintManager();
53 ~SketchSolver_ConstraintManager();
55 /** \brief Adds or updates a constraint in the suitable group
56 * \param[in] theConstraint constraint to be changed
57 * \return \c true if the constraint changed successfully
59 bool changeConstraint(boost::shared_ptr<SketchPlugin_Constraint> theConstraint);
61 /** \brief Removes a constraint from the manager
62 * \param[in] theConstraint constraint to be removed
63 * \return \c true if the constraint removed successfully
65 bool removeConstraint(boost::shared_ptr<SketchPlugin_Constraint> theConstraint);
67 /** \brief Adds or updates a workplane in the manager
68 * \param[in] theSketch the feature to create or update workplane
69 * \return \c true if the workplane changed successfully
70 * \remark Type of theSketch is not verified inside
72 bool changeWorkplane(boost::shared_ptr<SketchPlugin_Feature> theSketch);
74 /** \brief Removes a workplane from the manager.
75 * All groups based on such workplane will be removed too.
76 * \param[in] theSketch the feature to be removed
77 * \return \c true if the workplane removed successfully
79 bool removeWorkplane(boost::shared_ptr<SketchPlugin_Sketch> theSketch);
81 /** \brief Updates entity which is neither workplane nor constraint
82 * \param[in] theFeature entity to be updated
84 void updateEntity(boost::shared_ptr<SketchPlugin_Feature> theFeature);
86 /** \brief Goes through the list of groups and solve the constraints
87 * \param[in] needEvent shows that some features are probably updated and Update event should be thrown
89 void resolveConstraints(const bool needEvent);
92 class SketchSolver_ConstraintGroup;
94 /** \brief Searches list of groups which interact with specified constraint
95 * \param[in] theConstraint constraint to be found
96 * \param[out] theGroups list of group indexes interacted with constraint
98 void findGroups(boost::shared_ptr<SketchPlugin_Constraint> theConstraint,
99 std::vector<Slvs_hGroup>& theGroupIDs) const;
101 /** \brief Searches in the list of groups the workplane which constains specified constraint
102 * \param[in] theConstraint constraint to be found
103 * \return workplane containing the constraint
105 boost::shared_ptr<SketchPlugin_Feature> findWorkplaneForConstraint(
106 boost::shared_ptr<SketchPlugin_Constraint> theConstraint) const;
109 static SketchSolver_ConstraintManager* _self; ///< Self pointer to implement singleton functionality
110 std::vector<SketchSolver_ConstraintGroup*> myGroups; ///< Groups of constraints
114 /** \class SketchSolver_ConstraintGroup
116 * \brief Keeps the group of constraints which based on the same entities
118 class SketchSolver_ConstraintManager::SketchSolver_ConstraintGroup
121 /** \brief New group based on specified workplane.
122 * Throws an exception if theWorkplane is not an object of SketchPlugin_Sketch type
123 * \remark Type of theSketch is not verified inside
125 SketchSolver_ConstraintGroup(boost::shared_ptr<SketchPlugin_Feature> theWorkplane);
127 ~SketchSolver_ConstraintGroup();
129 /// \brief Returns group's unique identifier
130 const Slvs_hGroup& getId() const
133 /** \brief Adds or updates a constraint in the group
134 * \param[in] theConstraint constraint to be changed
135 * \return \c true if the constraint added or updated successfully
137 bool changeConstraint(boost::shared_ptr<SketchPlugin_Constraint> theConstraint);
139 /** \brief Verifies the constraint uses the objects from this group
140 * \param[in] theConstraint constraint for verification of interaction
141 * \return \c true if the constrained objects are used in current group
143 bool isInteract(boost::shared_ptr<SketchPlugin_Constraint> theConstraint) const;
145 /** \brief Verifies the specified feature is equal to the base workplane for this group
146 * \param[in] theWorkplane the feature to be compared with base workplane
147 * \return \c true if workplanes are the same
149 bool isBaseWorkplane(boost::shared_ptr<SketchPlugin_Feature> theWorkplane) const;
151 boost::shared_ptr<SketchPlugin_Feature> getWorkplane() const
154 /** \brief Update parameters of workplane. Should be called when Update event is coming.
155 * \return \c true if workplane updated successfully, \c false if workplane parameters are not consistent
157 bool updateWorkplane();
159 /** \brief If the entity is in this group it will updated
160 * \param[in] theEntity attribute, which values should update SolveSpace entity
162 void updateEntityIfPossible(boost::shared_ptr<ModelAPI_Attribute> theEntity);
164 /** \brief Searches invalid features and constraints in the group and avoids them
165 * \return \c true if the group's sketch is invalid and the group should be removed
169 /** \brief Start solution procedure if necessary and update attributes of features
171 void resolveConstraints();
174 /** \brief Adds or updates an entity in the group
176 * The parameters of entity will be parsed and added to the list of SolveSpace parameters.
177 * Parameters of certain entity will be placed sequentially in the list.
179 * \param[in] theEntity the object of constraint
180 * \return identifier of changed entity or 0 if entity could not be changed
182 Slvs_hEntity changeEntity(boost::shared_ptr<ModelAPI_Attribute> theEntity);
184 /** \brief Adds or updates a normal in the group
186 * Normal is a special entity in SolveSpace, which defines a direction in 3D and
187 * a rotation about this direction. So, SolveSpace represents normals as unit quaternions.
189 * To define a normal there should be specified two coordinate axis
190 * on the plane transversed to created normal.
192 * \param[in] theDirX first coordinate axis of the plane
193 * \param[in] theDirY second coordinate axis of the plane
194 * \param[in] theNorm attribute for the normal (used to identify newly created entity)
195 * \return identifier of created or updated normal
197 Slvs_hEntity changeNormal(boost::shared_ptr<ModelAPI_Attribute> theDirX,
198 boost::shared_ptr<ModelAPI_Attribute> theDirY,
199 boost::shared_ptr<ModelAPI_Attribute> theNorm);
201 /** \brief Adds or updates a parameter in the group
202 * \param[in] theParam the value of parameter
203 * \param[in] thePrmIter the cell in the list of parameters which should be changed
204 * (the iterator will be increased if it does not reach the end of the list)
205 * \return identifier of changed parameter; when the parameter cannot be created, returned ID is 0
207 Slvs_hParam changeParameter(const double& theParam,
208 std::vector<Slvs_Param>::const_iterator& thePrmIter);
210 /** \brief Compute constraint type according to SolveSpace identifiers
211 * and verify that constraint parameters are correct
212 * \param[in] theConstraint constraint which type should be determined
213 * \return identifier of constraint type or SLVS_C_UNKNOWN if the type is wrong
215 int getConstraintType(const boost::shared_ptr<SketchPlugin_Constraint>& theConstraint) const;
217 /** \brief Change values of attribute by parameters received from SolveSpace solver
218 * \param[in,out] theAttribute pointer to the attribute to be changed
219 * \param[in] theEntityID identifier of SolveSpace entity, which contains updated data
221 void updateAttribute(boost::shared_ptr<ModelAPI_Attribute> theAttribute, const Slvs_hEntity& theEntityID);
223 /** \brief Adds a constraint for a point which should not be changed during computations
224 * \param[in] theEntity the base for the constraint
226 void addTemporaryConstraintWhereDragged(boost::shared_ptr<ModelAPI_Attribute> theEntity);
228 /** \brief Remove all temporary constraint after computation finished
230 void removeTemporaryConstraints();
233 /** \brief Creates a workplane from the sketch parameters
234 * \param[in] theSketch parameters of workplane are the attributes of this sketch
235 * \return \c true if success, \c false if workplane parameters are not consistent
237 bool addWorkplane(boost::shared_ptr<SketchPlugin_Feature> theSketch);
240 // SolveSpace entities
241 Slvs_hGroup myID; ///< the index of the group
242 Slvs_Entity myWorkplane; ///< Workplane for the current group
243 std::vector<Slvs_Param> myParams; ///< List of parameters of the constraints
244 Slvs_hParam myParamMaxID; ///< Actual maximal ID of parameters (not equal to myParams size)
245 std::vector<Slvs_Entity> myEntities; ///< List of entities of the constaints
246 Slvs_hEntity myEntityMaxID; ///< Actual maximal ID of entities (not equal to myEntities size)
247 std::vector<Slvs_Constraint> myConstraints; ///< List of constraints in SolveSpace format
248 Slvs_hConstraint myConstrMaxID; ///< Actual maximal ID of constraints (not equal to myConstraints size)
249 bool myNeedToSolve; ///< Indicator that something changed in the group and constraint system need to be rebuilt
251 SketchSolver_Solver myConstrSolver; ///< Solver for set of equations obtained by constraints
253 // SketchPlugin entities
254 boost::shared_ptr<SketchPlugin_Feature> mySketch; ///< Equivalent to workplane
255 std::map<boost::shared_ptr<SketchPlugin_Constraint>, Slvs_hConstraint>
256 myConstraintMap; ///< The map between SketchPlugin and SolveSpace constraints
257 std::list<Slvs_hConstraint> myTempConstraints; ///< The list of identifiers of temporary constraints
258 std::map<boost::shared_ptr<ModelAPI_Attribute>, Slvs_hEntity>
259 myEntityMap; ///< The map between parameters of constraints and their equivalent SolveSpace entities