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-- File: Geom2dAPI_InterCurveCurve.cdl
-- Created: Thu Mar 24 10:59:18 1994
-- Author: Bruno DUMORTIER
-- <dub@fuegox>
---Copyright: Matra Datavision 1994
class InterCurveCurve from Geom2dAPI
---Purpose: This class implements methods for computing
-- - the intersections between two 2D curves,
-- - the self-intersections of a 2D curve.
-- Using the InterCurveCurve algorithm allows to get the following results:
-- - intersection points in the case of cross intersections,
-- - intersection segments in the case of tangential intersections,
-- - nothing in the case of no intersections.
uses
Curve from Geom2d,
Pnt2d from gp,
GInter from Geom2dInt
raises
OutOfRange from Standard,
NullObject from Standard
is
Create
---Purpose: Create an empty intersector. Use the
-- function Init for further initialization of the intersection
-- algorithm by curves or curve.
---Level: Public
returns InterCurveCurve from Geom2dAPI;
Create(C1 : Curve from Geom2d;
C2 : Curve from Geom2d;
Tol : Real from Standard = 1.0e-6)
---Purpose: Creates an object and computes the
-- intersections between the curves C1 and C2.
returns InterCurveCurve from Geom2dAPI;
Create(C1 : Curve from Geom2d;
Tol : Real from Standard = 1.0e-6)
---Purpose:
-- Creates an object and computes self-intersections of the curve C1.
-- Tolerance value Tol, defaulted to 1.0e-6, defines the precision of
-- computing the intersection points.
-- In case of a tangential intersection, Tol also defines the
-- size of intersection segments (limited portions of the curves)
-- where the distance between all points from two curves (or a curve
-- in case of self-intersection) is less than Tol.
-- Warning
-- Use functions NbPoints and NbSegments to obtain the number of
-- solutions. If the algorithm finds no intersections NbPoints and
-- NbSegments return 0.
returns InterCurveCurve from Geom2dAPI;
Init( me : in out;
C1 : Curve from Geom2d;
C2 : Curve from Geom2d;
Tol : Real from Standard = 1.0e-6)
---Purpose: Initializes an algorithm with the
-- given arguments and computes the intersections between the curves C1. and C2.
is static;
Init( me : in out;
C1 : Curve from Geom2d;
Tol : Real from Standard = 1.0e-6)
---Purpose: Initializes an algorithm with the
-- given arguments and computes the self-intersections of the curve C1.
-- Tolerance value Tol, defaulted to 1.0e-6, defines the precision of
-- computing the intersection points. In case of a tangential
-- intersection, Tol also defines the size of intersection segments
-- (limited portions of the curves) where the distance between all
-- points from two curves (or a curve in case of self-intersection) is less than Tol.
-- Warning
-- Use functions NbPoints and NbSegments to obtain the number
-- of solutions. If the algorithm finds no intersections NbPoints
-- and NbSegments return 0.
is static;
NbPoints(me)
returns Integer from Standard
---Purpose: Returns the number of intersection-points in case of cross intersections.
-- NbPoints returns 0 if no intersections were found.
is static;
Point(me; Index : Integer from Standard)
returns Pnt2d from gp
---Purpose: Returns the intersection point of index Index.
-- Intersection points are computed in case of cross intersections with a
-- precision equal to the tolerance value assigned at the time of
-- construction or in the function Init (this value is defaulted to 1.0e-6).
-- Exceptions
-- Standard_OutOfRange if index is not in the range [ 1,NbPoints ], where
-- NbPoints is the number of computed intersection points
raises
OutOfRange from Standard
is static;
NbSegments(me)
returns Integer from Standard
---Purpose: Returns the number of tangential intersections.
-- NbSegments returns 0 if no intersections were found
is static;
Segment(me; Index : Integer from Standard;
Curve1, Curve2 : in out Curve from Geom2d)
---Purpose: Use this syntax only to get
-- solutions of tangential intersection between two curves.
-- Output values Curve1 and Curve2 are the intersection segments on the
-- first curve and on the second curve accordingly. Parameter Index
-- defines a number of computed solution.
-- An intersection segment is a portion of an initial curve limited
-- by two points. The distance from each point of this segment to the
-- other curve is less or equal to the tolerance value assigned at the
-- time of construction or in function Init (this value is defaulted to 1.0e-6).
-- Exceptions
-- Standard_OutOfRange if Index is not in the range [ 1,NbSegments ],
-- where NbSegments is the number of computed tangential intersections.
-- Standard_NullObject if the algorithm is initialized for the
-- computing of self-intersections on a curve.
raises
OutOfRange from Standard,
NullObject from Standard
is static;
Segment(me; Index : Integer from Standard;
Curve1 : in out Curve from Geom2d)
---Purpose: Use this syntax to get solutions of
-- tangential intersections only in case of a self-intersected curve.
-- Output value Curve1 is the intersection segment of the curve
-- defined by number Index. An intersection segment is a
-- portion of the initial curve limited by two points. The distance
-- between each point of this segment to another portion of the curve is
-- less or equal to the tolerance value assigned at the time of
-- construction or in the function Init (this value is defaulted to 1.0e-6).
-- Exceptions
-- Standard_OutOfRange if Index is not in the range [ 1,NbSegments ],
-- where NbSegments is the number of computed tangential intersections.
raises
OutOfRange from Standard
is static;
Intersector(me)
---Purpose: return the algorithmic object from Intersection.
---Level: Advanced
returns GInter from Geom2dInt
---C++: return const &
---C++: inline
is static;
fields
myIsDone : Boolean from Standard;
myCurve1 : Curve from Geom2d;
myCurve2 : Curve from Geom2d;
myIntersector : GInter from Geom2dInt;
end InterCurveCurve;
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