mirror of
https://git.dev.opencascade.org/repos/occt.git
synced 2025-07-30 13:05:50 +03:00
d5f74e42d6
License statement text corrected; compiler warnings caused by Bison 2.41 disabled for MSVC; a few other compiler warnings on 54-bit Windows eliminated by appropriate type cast Wrong license statements corrected in several files. Copyright and license statements added in XSD and GLSL files. Copyright year updated in some files. Obsolete documentation files removed from DrawResources.
77 lines
2.9 KiB
Plaintext
77 lines
2.9 KiB
Plaintext
-- Created on: 1993-07-22
|
|
-- Created by: Isabelle GRIGNON
|
|
-- Copyright (c) 1993-1999 Matra Datavision
|
|
-- Copyright (c) 1999-2014 OPEN CASCADE SAS
|
|
--
|
|
-- This file is part of Open CASCADE Technology software library.
|
|
--
|
|
-- This library is free software; you can redistribute it and/or modify it under
|
|
-- the terms of the GNU Lesser General Public License version 2.1 as published
|
|
-- by the Free Software Foundation, with special exception defined in the file
|
|
-- OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
|
|
-- distribution for complete text of the license and disclaimer of any warranty.
|
|
--
|
|
-- Alternatively, this file may be used under the terms of Open CASCADE
|
|
-- commercial license or contractual agreement.
|
|
|
|
package BRepBndLib
|
|
|
|
---Purpose: This package provides the bounding boxes for curves
|
|
-- and surfaces from BRepAdaptor.
|
|
-- Functions to add a topological shape to a bounding box
|
|
uses BRepAdaptor,
|
|
Bnd,
|
|
TopoDS,
|
|
Geom,
|
|
GeomAbs,
|
|
TColgp,
|
|
gp
|
|
|
|
is
|
|
|
|
--
|
|
-- Package methods for shapes
|
|
--
|
|
|
|
Add(S : Shape from TopoDS;
|
|
B : in out Box from Bnd;
|
|
useTriangulation: Boolean from Standard = Standard_True);
|
|
---Purpose:Adds the shape S to the bounding box B.
|
|
-- More precisely are successively added to B:
|
|
-- - each face of S; the triangulation of the face is used if it exists,
|
|
-- - then each edge of S which does not belong to a face,
|
|
-- the polygon of the edge is used if it exists
|
|
-- - and last each vertex of S which does not belong to an edge.
|
|
-- After each elementary operation, the bounding box B is
|
|
-- enlarged by the tolerance value of the relative sub-shape.
|
|
-- When working with the triangulation of a face this value of
|
|
-- enlargement is the sum of the triangulation deflection and
|
|
-- the face tolerance. When working with the
|
|
-- polygon of an edge this value of enlargement is
|
|
-- the sum of the polygon deflection and the edge tolerance.
|
|
-- Warning
|
|
-- - This algorithm is time consuming if triangulation has not
|
|
-- been inserted inside the data structure of the shape S.
|
|
-- - The resulting bounding box may be somewhat larger than the object.
|
|
|
|
|
|
AddClose(S : Shape from TopoDS; B : in out Box from Bnd);
|
|
---Purpose: Adds the shape S to the bounding box B.
|
|
-- This is a quick algorithm but only works if the shape S is
|
|
-- composed of polygonal planar faces, as is the case if S is
|
|
-- an approached polyhedral representation of an exact
|
|
-- shape. Pay particular attention to this because this
|
|
-- condition is not checked and, if it not respected, an error
|
|
-- may occur in the algorithm for which the bounding box is built.
|
|
-- Note that the resulting bounding box is not enlarged by the
|
|
-- tolerance value of the sub-shapes as is the case with the
|
|
-- Add function. So the added part of the resulting bounding
|
|
-- box is closer to the shape S.
|
|
|
|
|
|
end BRepBndLib;
|
|
|
|
|
|
|
|
|