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 // Unknown constraint (for error reporting)
24 #define SLVS_C_UNKNOWN 0
26 #define SLVS_E_UNKNOWN 0
28 /** \class SketchSolver_ConstraintManager
30 * \brief Listens the changes of SketchPlugin features and transforms the Constraint
31 * feature into the format understandable by SolveSpace library.
33 * Constraints created for SolveSpace library are divided into the groups.
34 * The division order based on connectedness of the features by the constraints.
35 * The groups may be fused or separated according to the new constraints.
37 * \remark This is a singleton.
39 class SketchSolver_ConstraintManager : public Events_Listener
42 /** \brief Main method to create constraint manager
43 * \return pointer to the singleton
45 static SketchSolver_ConstraintManager* Instance();
47 /** \brief Implementation of Event Listener method
48 * \param[in] theMessage the data of the event
50 virtual void processEvent(const Events_Message* theMessage);
53 SketchSolver_ConstraintManager();
54 ~SketchSolver_ConstraintManager();
56 /** \brief Adds or updates a constraint in the suitable group
57 * \param[in] theConstraint constraint to be changed
58 * \return \c true if the constraint changed successfully
60 bool changeConstraint(boost::shared_ptr<SketchPlugin_Constraint> theConstraint);
62 /** \brief Removes a constraint from the manager
63 * \param[in] theConstraint constraint to be removed
64 * \return \c true if the constraint removed successfully
66 bool removeConstraint(boost::shared_ptr<SketchPlugin_Constraint> theConstraint);
68 /** \brief Adds or updates a workplane in the manager
69 * \param[in] theSketch the feature to create or update workplane
70 * \return \c true if the workplane changed successfully
71 * \remark Type of theSketch is not verified inside
73 bool changeWorkplane(boost::shared_ptr<SketchPlugin_Feature> theSketch);
75 /** \brief Removes a workplane from the manager.
76 * All groups based on such workplane will be removed too.
77 * \param[in] theSketch the feature to be removed
78 * \return \c true if the workplane removed successfully
80 bool removeWorkplane(boost::shared_ptr<SketchPlugin_Sketch> theSketch);
82 /** \brief Updates entity which is neither workplane nor constraint
83 * \param[in] theFeature entity to be updated
85 void updateEntity(boost::shared_ptr<SketchPlugin_Feature> theFeature);
87 /** \brief Goes through the list of groups and solve the constraints
89 void resolveConstraints();
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::set<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 inline const Slvs_hGroup& getId() const
133 /// \brief Returns true if the group has no constraints yet
134 inline bool isEmpty() const
135 {return myConstraints.empty();}
137 /** \brief Adds or updates a constraint in the group
138 * \param[in] theConstraint constraint to be changed
139 * \return \c true if the constraint added or updated successfully
141 bool changeConstraint(boost::shared_ptr<SketchPlugin_Constraint> theConstraint);
143 /** \brief Verifies the constraint uses the objects from this group
144 * \param[in] theConstraint constraint for verification of interaction
145 * \return \c true if the constrained objects are used in current group
147 bool isInteract(boost::shared_ptr<SketchPlugin_Constraint> theConstraint) const;
149 /** \brief Verifies the specified feature is equal to the base workplane for this group
150 * \param[in] theWorkplane the feature to be compared with base workplane
151 * \return \c true if workplanes are the same
153 bool isBaseWorkplane(boost::shared_ptr<SketchPlugin_Feature> theWorkplane) const;
155 boost::shared_ptr<SketchPlugin_Feature> getWorkplane() const
158 /** \brief Update parameters of workplane. Should be called when Update event is coming.
159 * \return \c true if workplane updated successfully, \c false if workplane parameters are not consistent
161 bool updateWorkplane();
163 /** \brief If the entity is in this group it will updated
164 * \param[in] theEntity attribute, which values should update SolveSpace entity
166 void updateEntityIfPossible(boost::shared_ptr<ModelAPI_Attribute> theEntity);
168 /** \brief Searches invalid features and constraints in the group and avoids them
169 * \return \c true if the group's sketch is invalid and the group should be removed
173 /** \brief Add specified group to this one
174 * \param[in] theGroup group of constraint to be added
176 void mergeGroups(const SketchSolver_ConstraintGroup& theGroup);
178 /** \brief Start solution procedure if necessary and update attributes of features
180 void resolveConstraints();
183 /** \brief Adds or updates an entity in the group
185 * The parameters of entity will be parsed and added to the list of SolveSpace parameters.
186 * Parameters of certain entity will be placed sequentially in the list.
188 * \param[in] theEntity the object of constraint
189 * \return identifier of changed entity or 0 if entity could not be changed
191 Slvs_hEntity changeEntity(boost::shared_ptr<ModelAPI_Attribute> theEntity);
193 /** \brief Adds or updates a normal in the group
195 * Normal is a special entity in SolveSpace, which defines a direction in 3D and
196 * a rotation about this direction. So, SolveSpace represents normals as unit quaternions.
198 * To define a normal there should be specified two coordinate axis
199 * on the plane transversed to created normal.
201 * \param[in] theDirX first coordinate axis of the plane
202 * \param[in] theDirY second coordinate axis of the plane
203 * \param[in] theNorm attribute for the normal (used to identify newly created entity)
204 * \return identifier of created or updated normal
206 Slvs_hEntity changeNormal(boost::shared_ptr<ModelAPI_Attribute> theDirX,
207 boost::shared_ptr<ModelAPI_Attribute> theDirY,
208 boost::shared_ptr<ModelAPI_Attribute> theNorm);
210 /** \brief Adds or updates a parameter in the group
211 * \param[in] theParam the value of parameter
212 * \param[in] thePrmIter the cell in the list of parameters which should be changed
213 * (the iterator will be increased if it does not reach the end of the list)
214 * \return identifier of changed parameter; when the parameter cannot be created, returned ID is 0
216 Slvs_hParam changeParameter(const double& theParam,
217 std::vector<Slvs_Param>::const_iterator& thePrmIter);
219 /** \brief Compute constraint type according to SolveSpace identifiers
220 * and verify that constraint parameters are correct
221 * \param[in] theConstraint constraint which type should be determined
222 * \param[out] theAttrNames names of attributes in order required by SolveSpace (unused attributes have empty names)
223 * \return identifier of constraint type or SLVS_C_UNKNOWN if the type is wrong
225 int getConstraintType(const boost::shared_ptr<SketchPlugin_Constraint>& theConstraint,
226 std::vector<std::string>& theAttrNames) const;
228 /** \brief Change values of attribute by parameters received from SolveSpace solver
229 * \param[in,out] theAttribute pointer to the attribute to be changed
230 * \param[in] theEntityID identifier of SolveSpace entity, which contains updated data
232 void updateAttribute(boost::shared_ptr<ModelAPI_Attribute> theAttribute, const Slvs_hEntity& theEntityID);
234 /** \brief Adds a constraint for a point which should not be changed during computations
235 * \param[in] theEntity the base for the constraint
237 void addTemporaryConstraintWhereDragged(boost::shared_ptr<ModelAPI_Attribute> theEntity);
239 /** \brief Remove all temporary constraint after computation finished
241 void removeTemporaryConstraints();
244 /** \brief Creates a workplane from the sketch parameters
245 * \param[in] theSketch parameters of workplane are the attributes of this sketch
246 * \return \c true if success, \c false if workplane parameters are not consistent
248 bool addWorkplane(boost::shared_ptr<SketchPlugin_Feature> theSketch);
251 // SolveSpace entities
252 Slvs_hGroup myID; ///< the index of the group
253 Slvs_Entity myWorkplane; ///< Workplane for the current group
254 std::vector<Slvs_Param> myParams; ///< List of parameters of the constraints
255 Slvs_hParam myParamMaxID; ///< Actual maximal ID of parameters (not equal to myParams size)
256 std::vector<Slvs_Entity> myEntities; ///< List of entities of the constaints
257 Slvs_hEntity myEntityMaxID; ///< Actual maximal ID of entities (not equal to myEntities size)
258 std::vector<Slvs_Constraint> myConstraints; ///< List of constraints in SolveSpace format
259 Slvs_hConstraint myConstrMaxID; ///< Actual maximal ID of constraints (not equal to myConstraints size)
260 bool myNeedToSolve; ///< Indicator that something changed in the group and constraint system need to be rebuilt
262 SketchSolver_Solver myConstrSolver; ///< Solver for set of equations obtained by constraints
264 // SketchPlugin entities
265 boost::shared_ptr<SketchPlugin_Feature> mySketch; ///< Equivalent to workplane
266 std::map<boost::shared_ptr<SketchPlugin_Constraint>, Slvs_hConstraint>
267 myConstraintMap; ///< The map between SketchPlugin and SolveSpace constraints
268 std::list<Slvs_hConstraint> myTempConstraints; ///< The list of identifiers of temporary constraints
269 std::map<boost::shared_ptr<ModelAPI_Attribute>, Slvs_hEntity>
270 myEntityMap; ///< The map between parameters of constraints and their equivalent SolveSpace entities