0024428: Implementation of LGPL license
[occt.git] / src / BRepBndLib / BRepBndLib.cdl
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b311480e 1-- Created on: 1993-07-22
2-- Created by: Isabelle GRIGNON
3-- Copyright (c) 1993-1999 Matra Datavision
973c2be1 4-- Copyright (c) 1999-2014 OPEN CASCADE SAS
b311480e 5--
973c2be1 6-- This file is part of Open CASCADE Technology software library.
b311480e 7--
973c2be1 8-- This library is free software; you can redistribute it and / or modify it
9-- under the terms of the GNU Lesser General Public version 2.1 as published
10-- by the Free Software Foundation, with special exception defined in the file
11-- OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
12-- distribution for complete text of the license and disclaimer of any warranty.
b311480e 13--
973c2be1 14-- Alternatively, this file may be used under the terms of Open CASCADE
15-- commercial license or contractual agreement.
7fd59977 16
17package BRepBndLib
18
19 ---Purpose: This package provides the bounding boxes for curves
20 -- and surfaces from BRepAdaptor.
21-- Functions to add a topological shape to a bounding box
22uses BRepAdaptor,
23 Bnd,
24 TopoDS,
25 Geom,
26 GeomAbs,
27 TColgp,
28 gp
29
30is
31
32 --
33 -- Package methods for shapes
34 --
35
3c34883c
O
36 Add(S : Shape from TopoDS;
37 B : in out Box from Bnd;
38 useTriangulation: Boolean from Standard = Standard_True);
7fd59977 39 ---Purpose:Adds the shape S to the bounding box B.
40-- More precisely are successively added to B:
41-- - each face of S; the triangulation of the face is used if it exists,
42-- - then each edge of S which does not belong to a face,
43-- the polygon of the edge is used if it exists
44-- - and last each vertex of S which does not belong to an edge.
45-- After each elementary operation, the bounding box B is
46-- enlarged by the tolerance value of the relative sub-shape.
47-- When working with the triangulation of a face this value of
48-- enlargement is the sum of the triangulation deflection and
49-- the face tolerance. When working with the
50-- polygon of an edge this value of enlargement is
51-- the sum of the polygon deflection and the edge tolerance.
52-- Warning
53-- - This algorithm is time consuming if triangulation has not
54-- been inserted inside the data structure of the shape S.
55-- - The resulting bounding box may be somewhat larger than the object.
56
57
58 AddClose(S : Shape from TopoDS; B : in out Box from Bnd);
59 ---Purpose: Adds the shape S to the bounding box B.
60-- This is a quick algorithm but only works if the shape S is
61-- composed of polygonal planar faces, as is the case if S is
62-- an approached polyhedral representation of an exact
63-- shape. Pay particular attention to this because this
64-- condition is not checked and, if it not respected, an error
65-- may occur in the algorithm for which the bounding box is built.
66-- Note that the resulting bounding box is not enlarged by the
67-- tolerance value of the sub-shapes as is the case with the
68-- Add function. So the added part of the resulting bounding
69-- box is closer to the shape S.
70
71
72end BRepBndLib;
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