+ /// \brief Shows error message
+ const std::string& error() const
+ { return myErrorMsg; }
+
+protected:
+ /// \brief Converts SketchPlugin constraint to a list of SolveSpace constraints
+ virtual void process();
+
+ /// \brief Generate list of attributes of constraint in order useful for SolveSpace constraints
+ /// \param[out] theValue numerical characteristic of constraint (e.g. distance)
+ /// \param[out] theAttributes list of attributes to be filled
+ virtual void getAttributes(double& theValue, std::vector<Slvs_hEntity>& theAttributes);
+
+ /// \brief Verify the attributes of constraint are changed (and constraint need to rebuild)
+ /// \param[in] theConstraint constraint, which attributes should be checked (if NULL, the myBaseConstraint is used)
+ /// \return \c true if some attributes are changed
+ virtual bool checkAttributesChanged(ConstraintPtr theConstraint);
+
+ /// \brief This method is used in derived objects to check consistency of constraint.
+ /// E.g. the distance between line and point may be signed.
+ virtual void adjustConstraint()
+ {}
+
+ /// \brief Create or change SlveSpace entity according to the given attribute
+ /// \param[in] theAttribute reference to the entity to be changed
+ /// \param[out] theType type of created entity
+ /// \return identifier of created/updated entity
+ Slvs_hEntity changeEntity(AttributeRefAttrPtr theAttribute, int& theType);
+ /// \brief Create or change SlveSpace entity according to the given attribute
+ Slvs_hEntity changeEntity(AttributePtr theAttribute, int& theType);
+ /// \brief Create or change SlveSpace entity according to the given feature
+ Slvs_hEntity changeEntity(FeaturePtr theFeature, int& theType);
+
+ /// \brief Calculate middle point on the specified entity
+ /// \param[in] theEntity arc or line
+ /// \param[in] theCoeff is a value in [0.0, 1.0] which shows the position of the point on the entity (0.0 - start point, 1.0 - end point)
+ /// \param[out] theX X coordinate of middle point
+ /// \param[out] theY Y coordinate of middle point
+ void calculateMiddlePoint(const Slvs_Entity& theEntity, double theCoeff,
+ double& theX, double& theY) const;
+
+ /// \brief Removes the links to unused entities
+ void cleanRemovedEntities();
+
+ /// \brief Removes last error
+ void cleanErrorMsg()
+ { myErrorMsg.clear(); }
+
+private:
+ /// \brief Sets error, if the attribute is not initialized
+ bool isInitialized(AttributePtr theAttribute);
+
+protected:
+ SketchSolver_Group* myGroup; ///< the group which contains current constraint
+ ConstraintPtr myBaseConstraint; ///< SketchPlugin constraint
+ std::vector<Slvs_hConstraint> mySlvsConstraints; ///< list of indices of SolveSpace constraints, together which equivalent to SketchPlugin constraint
+ std::map<FeaturePtr, Slvs_hEntity> myFeatureMap; ///< map feature to the entity it represents
+ std::map<AttributePtr, Slvs_hEntity> myAttributeMap; ///< map attribute to the corresponding entity
+ std::map<AttributePtr, Slvs_hParam> myValueMap; ///< list of attributes, which represents single value (e.g. distance) used in constraint
+ StoragePtr myStorage; ///< storage, which contains all information about entities and constraints in current group
+
+ std::string myErrorMsg; ///< error message
+};
+
+typedef std::shared_ptr<SketchSolver_Constraint> SolverConstraintPtr;
+
+
+
+/** \class SketchSolver_ConstraintParallel
+ * \ingroup Plugins
+ * \brief Convert Parallel constraint to SolveSpace structure
+ */
+class SketchSolver_ConstraintParallel : public SketchSolver_Constraint
+{
+public:
+ SketchSolver_ConstraintParallel(ConstraintPtr theConstraint) :
+ SketchSolver_Constraint(theConstraint)
+ {}
+
+ virtual int getType() const
+ { return SLVS_C_PARALLEL; }
+};
+
+
+/** \class SketchSolver_ConstraintPerpendicular
+ * \ingroup Plugins
+ * \brief Convert Perpendicular constraint to SolveSpace structure
+ */
+class SketchSolver_ConstraintPerpendicular : public SketchSolver_Constraint
+{
+public:
+ SketchSolver_ConstraintPerpendicular(ConstraintPtr theConstraint) :
+ SketchSolver_Constraint(theConstraint)
+ {}
+
+ virtual int getType() const
+ { return SLVS_C_PERPENDICULAR; }
+};
+
+
+/** \class SketchSolver_ConstraintHorizontal
+ * \ingroup Plugins
+ * \brief Convert Horizontal constraint to SolveSpace structure
+ */
+class SketchSolver_ConstraintHorizontal : public SketchSolver_Constraint
+{
+public:
+ SketchSolver_ConstraintHorizontal(ConstraintPtr theConstraint) :
+ SketchSolver_Constraint(theConstraint)
+ {}
+
+ virtual int getType() const
+ { return SLVS_C_HORIZONTAL; }
+};
+
+
+/** \class SketchSolver_ConstraintVertical
+ * \ingroup Plugins
+ * \brief Convert Vertical constraint to SolveSpace structure
+ */
+class SketchSolver_ConstraintVertical : public SketchSolver_Constraint
+{
+public:
+ SketchSolver_ConstraintVertical(ConstraintPtr theConstraint) :
+ SketchSolver_Constraint(theConstraint)
+ {}
+
+ virtual int getType() const
+ { return SLVS_C_VERTICAL; }
+};
+
+
+/** \class SketchSolver_ConstraintRadius
+ * \ingroup Plugins
+ * \brief Convert Radius constraint to SolveSpace structure
+ */
+class SketchSolver_ConstraintRadius : public SketchSolver_Constraint
+{
+public:
+ SketchSolver_ConstraintRadius(ConstraintPtr theConstraint) :
+ SketchSolver_Constraint(theConstraint)
+ {}
+
+ virtual int getType() const
+ { return SLVS_C_DIAMETER; }
+
+ virtual void adjustConstraint()