Application Interactive Services provide the means to create links between an application GUI viewer and the packages which are used to manage selection and presentation. The tools AIS defined in order to do this include different sorts of entities: both the selectable viewable objects themselves and the context and attribute managers to define their selection and display. To orient the user as he works in a modeling environment, views and selections must be comprehensible. There must be several different sorts of selectable and viewable object defined. These must also be interactive, that is, connecting graphic representation and the underlying reference geometry. These entities are called Interactive Objects, and are divided into four types:
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| static gp_Pnt | Nearest (const TopoDS_Shape &aShape, const gp_Pnt &aPoint) |
| | Returns the nearest point in a shape. This is used by several classes in calculation of dimensions. More...
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| static gp_Pnt | Nearest (const gp_Lin &theLine, const gp_Pnt &thePoint) |
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| static Standard_Boolean | Nearest (const Handle< Geom_Curve > &theCurve, const gp_Pnt &thePoint, const gp_Pnt &theFirstPoint, const gp_Pnt &theLastPoint, gp_Pnt &theNearestPoint) |
| | For the given point finds nearest point on the curve,. More...
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| static gp_Pnt | Farest (const TopoDS_Shape &aShape, const gp_Pnt &aPoint) |
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| static Standard_Boolean | ComputeGeometry (const TopoDS_Edge &theEdge, Handle< Geom_Curve > &theCurve, gp_Pnt &theFirstPnt, gp_Pnt &theLastPnt) |
| | Used by 2d Relation only Computes the 3d geometry of <anEdge> in the current WorkingPlane and the extremities if any Return TRUE if ok. More...
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| static Standard_Boolean | ComputeGeometry (const TopoDS_Edge &theEdge, Handle< Geom_Curve > &theCurve, gp_Pnt &theFirstPnt, gp_Pnt &theLastPnt, Standard_Boolean &theIsInfinite) |
| | Used by dimensions only. Computes the 3d geometry of <anEdge>. Return TRUE if ok. More...
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| static Standard_Boolean | ComputeGeometry (const TopoDS_Edge &theEdge, Handle< Geom_Curve > &theCurve, gp_Pnt &theFirstPnt, gp_Pnt &theLastPnt, Handle< Geom_Curve > &theExtCurve, Standard_Boolean &theIsInfinite, Standard_Boolean &theIsOnPlane, const Handle< Geom_Plane > &thePlane) |
| | Used by 2d Relation only Computes the 3d geometry of <anEdge> in the current WorkingPlane and the extremities if any. If <aCurve> is not in the current plane, <extCurve> contains the not projected curve associated to <anEdge>. If <anEdge> is infinite, <isinfinite> = true and the 2 parameters <FirstPnt> and <LastPnt> have no signification. Return TRUE if ok. More...
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| static Standard_Boolean | ComputeGeometry (const TopoDS_Edge &theFirstEdge, const TopoDS_Edge &theSecondEdge, Handle< Geom_Curve > &theFirstCurve, Handle< Geom_Curve > &theSecondCurve, gp_Pnt &theFirstPnt1, gp_Pnt &theLastPnt1, gp_Pnt &theFirstPnt2, gp_Pnt &theLastPnt2, const Handle< Geom_Plane > &thePlane) |
| | Used by 2d Relation only Computes the 3d geometry of <anEdge> in the current WorkingPlane and the extremities if any Return TRUE if ok. More...
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| static Standard_Boolean | ComputeGeometry (const TopoDS_Edge &theFirstEdge, const TopoDS_Edge &theSecondEdge, Handle< Geom_Curve > &theFirstCurve, Handle< Geom_Curve > &theSecondCurve, gp_Pnt &theFirstPnt1, gp_Pnt &theLastPnt1, gp_Pnt &theFirstPnt2, gp_Pnt &theLastPnt2, Standard_Boolean &theIsinfinite1, Standard_Boolean &theIsinfinite2) |
| | Used by dimensions only.Computes the 3d geometry of<anEdge1> and <anEdge2> and checks if they are infinite. More...
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| static Standard_Boolean | ComputeGeometry (const TopoDS_Edge &theFirstEdge, const TopoDS_Edge &theSecondEdge, Standard_Integer &theExtIndex, Handle< Geom_Curve > &theFirstCurve, Handle< Geom_Curve > &theSecondCurve, gp_Pnt &theFirstPnt1, gp_Pnt &theLastPnt1, gp_Pnt &theFirstPnt2, gp_Pnt &theLastPnt2, Handle< Geom_Curve > &theExtCurve, Standard_Boolean &theIsinfinite1, Standard_Boolean &theIsinfinite2, const Handle< Geom_Plane > &thePlane) |
| | Used by 2d Relation only Computes the 3d geometry of<anEdge1> and <anEdge2> in the current Plane and the extremities if any. Return in ExtCurve the 3d curve (not projected in the plane) of the first edge if <indexExt> =1 or of the 2nd edge if <indexExt> = 2. If <indexExt> = 0, ExtCurve is Null. if there is an edge external to the plane, <isinfinite> is true if this edge is infinite. So, the extremities of it are not significant. Return TRUE if ok. More...
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| static Standard_Boolean | ComputeGeomCurve (Handle< Geom_Curve > &aCurve, const Standard_Real first1, const Standard_Real last1, gp_Pnt &FirstPnt1, gp_Pnt &LastPnt1, const Handle< Geom_Plane > &aPlane, Standard_Boolean &isOnPlane) |
| | Checks if aCurve belongs to aPlane; if not, projects aCurve in aPlane and returns aCurve; Return TRUE if ok. More...
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| static Standard_Boolean | ComputeGeometry (const TopoDS_Vertex &aVertex, gp_Pnt &point, const Handle< Geom_Plane > &aPlane, Standard_Boolean &isOnPlane) |
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| static Standard_Boolean | GetPlaneFromFace (const TopoDS_Face &aFace, gp_Pln &aPlane, Handle< Geom_Surface > &aSurf, AIS_KindOfSurface &aSurfType, Standard_Real &Offset) |
| | Tryes to get Plane from Face. Returns Surface of Face in aSurf. Returns Standard_True and Plane of Face in aPlane in following cases: Face is Plane, Offset of Plane, Extrusion of Line and Offset of Extrusion of Line Returns pure type of Surface which can be: Plane, Cylinder, Cone, Sphere, Torus, SurfaceOfRevolution, SurfaceOfExtrusion. More...
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| static void | InitFaceLength (const TopoDS_Face &aFace, gp_Pln &aPlane, Handle< Geom_Surface > &aSurface, AIS_KindOfSurface &aSurfaceType, Standard_Real &anOffset) |
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| static void | InitLengthBetweenCurvilinearFaces (const TopoDS_Face &theFirstFace, const TopoDS_Face &theSecondFace, Handle< Geom_Surface > &theFirstSurf, Handle< Geom_Surface > &theSecondSurf, gp_Pnt &theFirstAttach, gp_Pnt &theSecondAttach, gp_Dir &theDirOnPlane) |
| | Finds attachment points on two curvilinear faces for length dimension. More...
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| static Standard_Boolean | InitAngleBetweenPlanarFaces (const TopoDS_Face &theFirstFace, const TopoDS_Face &theSecondFace, gp_Pnt &theCenter, gp_Pnt &theFirstAttach, gp_Pnt &theSecondAttach, const Standard_Boolean theIsFirstPointSet=Standard_False) |
| | Finds three points for the angle dimension between two planes. More...
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| static Standard_Boolean | InitAngleBetweenCurvilinearFaces (const TopoDS_Face &theFirstFace, const TopoDS_Face &theSecondFace, const AIS_KindOfSurface theFirstSurfType, const AIS_KindOfSurface theSecondSurfType, gp_Pnt &theCenter, gp_Pnt &theFirstAttach, gp_Pnt &theSecondAttach, const Standard_Boolean theIsFirstPointSet=Standard_False) |
| | Finds three points for the angle dimension between two curvilinear surfaces. More...
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| static gp_Pnt | ProjectPointOnPlane (const gp_Pnt &aPoint, const gp_Pln &aPlane) |
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| static gp_Pnt | ProjectPointOnLine (const gp_Pnt &aPoint, const gp_Lin &aLine) |
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| static gp_Pnt | TranslatePointToBound (const gp_Pnt &aPoint, const gp_Dir &aDir, const Bnd_Box &aBndBox) |
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| static Standard_Boolean | InDomain (const Standard_Real aFirstPar, const Standard_Real aLastPar, const Standard_Real anAttachPar) |
| | returns True if point with anAttachPar is in domain of arc More...
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| static gp_Pnt | NearestApex (const gp_Elips &elips, const gp_Pnt &pApex, const gp_Pnt &nApex, const Standard_Real fpara, const Standard_Real lpara, Standard_Boolean &IsInDomain) |
| | computes nearest to ellipse arc apex More...
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| static Standard_Real | DistanceFromApex (const gp_Elips &elips, const gp_Pnt &Apex, const Standard_Real par) |
| | computes length of ellipse arc in parametric units More...
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| static void | ComputeProjEdgePresentation (const Handle< Prs3d_Presentation > &aPres, const Handle< Prs3d_Drawer > &aDrawer, const TopoDS_Edge &anEdge, const Handle< Geom_Curve > &ProjCurve, const gp_Pnt &FirstP, const gp_Pnt &LastP, const Quantity_NameOfColor aColor=Quantity_NOC_PURPLE, const Standard_Real aWidth=2, const Aspect_TypeOfLine aProjTOL=Aspect_TOL_DASH, const Aspect_TypeOfLine aCallTOL=Aspect_TOL_DOT) |
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| static void | ComputeProjVertexPresentation (const Handle< Prs3d_Presentation > &aPres, const Handle< Prs3d_Drawer > &aDrawer, const TopoDS_Vertex &aVertex, const gp_Pnt &ProjPoint, const Quantity_NameOfColor aColor=Quantity_NOC_PURPLE, const Standard_Real aWidth=2, const Aspect_TypeOfMarker aProjTOM=Aspect_TOM_PLUS, const Aspect_TypeOfLine aCallTOL=Aspect_TOL_DOT) |
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Application Interactive Services provide the means to create links between an application GUI viewer and the packages which are used to manage selection and presentation. The tools AIS defined in order to do this include different sorts of entities: both the selectable viewable objects themselves and the context and attribute managers to define their selection and display. To orient the user as he works in a modeling environment, views and selections must be comprehensible. There must be several different sorts of selectable and viewable object defined. These must also be interactive, that is, connecting graphic representation and the underlying reference geometry. These entities are called Interactive Objects, and are divided into four types:
- the Datum
- the Relation
- the Object
- None. The Datum groups together the construction elements such as lines, circles, points, trihedra, plane trihedra, planes and axes. The Relation is made up of constraints on one or more interactive shapes and the corresponding reference geometry. For example, you might want to constrain two edges in a parallel relation. This contraint is considered as an object in its own right, and is shown as a sensitive primitive. This takes the graphic form of a perpendicular arrow marked with the || symbol and lying between the two edges. The Object type includes topological shapes, and connections between shapes. None, in order not to eliminate the object, tells the application to look further until it finds an object definition in its generation which is accepted. Inside these categories, you have the possibility of an additional characterization by means of a signature. The signature provides an index to the further characterization. By default, the Interactive Object has a None type and a signature of 0 (equivalent to None.) If you want to give a particular type and signature to your interactive object, you must redefine the two virtual methods: Type and Signature. In the C++ inheritance structure of the package, each class representing a specific Interactive Object inherits AIS_InteractiveObject. Among these inheriting classes, AIS_Relation functions as the abstract mother class for tinheriting classes defining display of specific relational constraints and types of dimension. Some of these include:
- display of constraints based on relations of symmetry, tangency, parallelism and concentricity
- display of dimensions for angles, offsets, diameters, radii and chamfers. No viewer can show everything at once with any coherence or clarity. Views must be managed carefully both sequentially and at any given instant. Another function of the view is that of a context to carry out design in. The design changes are applied to the objects in the view and then extended to the underlying reference geometry by a solver. To make sense of this complicated visual data, several display and selection tools are required. To facilitate management, each object and each construction element has a selection priority. There are also means to modify the default priority. To define an environment of dynamic detection, you can use standard filter classes or create your own. A filter questions the owner of the sensitive primitive in local context to determine if it has the the desired qualities. If it answers positively, it is kept. If not, it is rejected. The standard filters supplied in AIS include: AIS_AttributeFilter AIS_SignatureFilter AIS_TypeFilter. Only the type filter can be used in the default operating mode, the neutral point. The others can only be used in open local contexts. Neutral point and local context constitute the two operating modes of the central entity which pilots visualizations and selections, the Interactive Context. It is linked to a main viewer and if you like, a trash bin viewer as well. The neutral point, which is the default mode, allows you to easily visualize and select interactive objects which have been loaded into the context. Opening local contexts allows you to prepare and use a temporary selection environment without disturbing the neutral point. A set of functions allows you to choose the interactive objects which you want to act on, the selection modes which you want to activate, and the temporary visualizations which you will execute. When the operation is finished, you close the current local context and return to the state in which you were before opening it (neutral point or previous local context). An interactive object can have a certain number of graphic attributes which are specific to it, such as visualization mode, color, and material. By the same token, the interactive context has a set of graphic attributes, the Drawer which is valid by default for the objects it controls. When an interactive object is visualized, the required graphic attributes are first taken from the object's own Drawer if one exists, or from the context drawer for the others.
