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The copying permission statements at the beginning of source files updated to refer to LGPL. Copyright dates extended till 2014 in advance.
183 lines
7.1 KiB
Plaintext
183 lines
7.1 KiB
Plaintext
-- Created on: 1994-03-24
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-- Created by: Bruno DUMORTIER
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-- Copyright (c) 1994-1999 Matra Datavision
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-- Copyright (c) 1999-2014 OPEN CASCADE SAS
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--
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-- This file is part of Open CASCADE Technology software library.
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--
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-- This library is free software; you can redistribute it and / or modify it
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-- under the terms of the GNU Lesser General Public version 2.1 as published
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-- by the Free Software Foundation, with special exception defined in the file
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-- OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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-- distribution for complete text of the license and disclaimer of any warranty.
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--
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-- Alternatively, this file may be used under the terms of Open CASCADE
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-- commercial license or contractual agreement.
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class InterCurveCurve from Geom2dAPI
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---Purpose: This class implements methods for computing
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-- - the intersections between two 2D curves,
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-- - the self-intersections of a 2D curve.
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-- Using the InterCurveCurve algorithm allows to get the following results:
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-- - intersection points in the case of cross intersections,
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-- - intersection segments in the case of tangential intersections,
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-- - nothing in the case of no intersections.
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uses
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Curve from Geom2d,
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Pnt2d from gp,
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GInter from Geom2dInt
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raises
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OutOfRange from Standard,
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NullObject from Standard
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is
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Create
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---Purpose: Create an empty intersector. Use the
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-- function Init for further initialization of the intersection
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-- algorithm by curves or curve.
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---Level: Public
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returns InterCurveCurve from Geom2dAPI;
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Create(C1 : Curve from Geom2d;
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C2 : Curve from Geom2d;
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Tol : Real from Standard = 1.0e-6)
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---Purpose: Creates an object and computes the
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-- intersections between the curves C1 and C2.
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returns InterCurveCurve from Geom2dAPI;
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Create(C1 : Curve from Geom2d;
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Tol : Real from Standard = 1.0e-6)
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---Purpose:
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-- Creates an object and computes self-intersections of the curve C1.
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-- Tolerance value Tol, defaulted to 1.0e-6, defines the precision of
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-- computing the intersection points.
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-- In case of a tangential intersection, Tol also defines the
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-- size of intersection segments (limited portions of the curves)
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-- where the distance between all points from two curves (or a curve
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-- in case of self-intersection) is less than Tol.
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-- Warning
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-- Use functions NbPoints and NbSegments to obtain the number of
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-- solutions. If the algorithm finds no intersections NbPoints and
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-- NbSegments return 0.
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returns InterCurveCurve from Geom2dAPI;
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Init( me : in out;
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C1 : Curve from Geom2d;
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C2 : Curve from Geom2d;
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Tol : Real from Standard = 1.0e-6)
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---Purpose: Initializes an algorithm with the
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-- given arguments and computes the intersections between the curves C1. and C2.
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is static;
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Init( me : in out;
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C1 : Curve from Geom2d;
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Tol : Real from Standard = 1.0e-6)
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---Purpose: Initializes an algorithm with the
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-- given arguments and computes the self-intersections of the curve C1.
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-- Tolerance value Tol, defaulted to 1.0e-6, defines the precision of
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-- computing the intersection points. In case of a tangential
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-- intersection, Tol also defines the size of intersection segments
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-- (limited portions of the curves) where the distance between all
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-- points from two curves (or a curve in case of self-intersection) is less than Tol.
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-- Warning
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-- Use functions NbPoints and NbSegments to obtain the number
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-- of solutions. If the algorithm finds no intersections NbPoints
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-- and NbSegments return 0.
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is static;
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NbPoints(me)
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returns Integer from Standard
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---Purpose: Returns the number of intersection-points in case of cross intersections.
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-- NbPoints returns 0 if no intersections were found.
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is static;
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Point(me; Index : Integer from Standard)
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returns Pnt2d from gp
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---Purpose: Returns the intersection point of index Index.
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-- Intersection points are computed in case of cross intersections with a
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-- precision equal to the tolerance value assigned at the time of
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-- construction or in the function Init (this value is defaulted to 1.0e-6).
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-- Exceptions
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-- Standard_OutOfRange if index is not in the range [ 1,NbPoints ], where
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-- NbPoints is the number of computed intersection points
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raises
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OutOfRange from Standard
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is static;
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NbSegments(me)
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returns Integer from Standard
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---Purpose: Returns the number of tangential intersections.
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-- NbSegments returns 0 if no intersections were found
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is static;
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Segment(me; Index : Integer from Standard;
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Curve1, Curve2 : in out Curve from Geom2d)
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---Purpose: Use this syntax only to get
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-- solutions of tangential intersection between two curves.
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-- Output values Curve1 and Curve2 are the intersection segments on the
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-- first curve and on the second curve accordingly. Parameter Index
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-- defines a number of computed solution.
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-- An intersection segment is a portion of an initial curve limited
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-- by two points. The distance from each point of this segment to the
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-- other curve is less or equal to the tolerance value assigned at the
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-- time of construction or in function Init (this value is defaulted to 1.0e-6).
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-- Exceptions
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-- Standard_OutOfRange if Index is not in the range [ 1,NbSegments ],
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-- where NbSegments is the number of computed tangential intersections.
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-- Standard_NullObject if the algorithm is initialized for the
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-- computing of self-intersections on a curve.
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raises
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OutOfRange from Standard,
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NullObject from Standard
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is static;
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Segment(me; Index : Integer from Standard;
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Curve1 : in out Curve from Geom2d)
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---Purpose: Use this syntax to get solutions of
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-- tangential intersections only in case of a self-intersected curve.
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-- Output value Curve1 is the intersection segment of the curve
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-- defined by number Index. An intersection segment is a
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-- portion of the initial curve limited by two points. The distance
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-- between each point of this segment to another portion of the curve is
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-- less or equal to the tolerance value assigned at the time of
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-- construction or in the function Init (this value is defaulted to 1.0e-6).
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-- Exceptions
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-- Standard_OutOfRange if Index is not in the range [ 1,NbSegments ],
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-- where NbSegments is the number of computed tangential intersections.
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raises
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OutOfRange from Standard
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is static;
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Intersector(me)
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---Purpose: return the algorithmic object from Intersection.
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---Level: Advanced
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returns GInter from Geom2dInt
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---C++: return const &
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---C++: inline
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is static;
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fields
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myIsDone : Boolean from Standard;
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myCurve1 : Curve from Geom2d;
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myCurve2 : Curve from Geom2d;
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myIntersector : GInter from Geom2dInt;
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end InterCurveCurve;
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