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-- File: BRepAlgoAPI.cdl
-- Created: Tue Jul 6 17:29:03 1993
-- Author: Remi LEQUETTE
-- modified by Peter KURNEV Tue Mar 5 14:01:51 2002
---Copyright: Matra Datavision 1993
package BRepAlgoAPI
---Purpose: The BRepAlgoAPI package provides a full range of
-- services to perform Boolean Operations on arguments (shapes
-- that are defined in the BRep data structures). The
-- implemented new algorithm is intended to replace the Old
-- Boolean Operations algorithm in the BRepAlgoAPI package.
-- The New algorithm is free of a large number of weak spots
-- and limitations characteristics of the Old algorithm.
-- It is more powerful and flexible.
-- It can process arguments the Old algorithm was not adapted for.
-- The new algorithm is based on a new approach to operations
-- with interfered shapes. The advantages of the new algorithm
-- include an ability to treat arguments that have shared
-- entities. It can properly process two solids with shared
-- faces (in terms of TopoDS_Shape::IsSame()), two
-- faces that have shared edges and so on. Now the New Boolean
-- Operation algorithm can treat a wide range of shapes while the
-- Old one fails on them.
-- A generalization of treatment of same-domain faces
-- was included into the New algorithm. Two faces that share
-- the same domain are processed according to the common rule
-- even if the underlying surfaces are of different types. This
-- allows to execute Boolean Operations properly for the same
-- domain faces. It also concerns solids and shells that have the
-- same domain faces. It is quite frequent when two faces share
-- the same domain. And the New algorithm successfully copes
-- with it in contrast to the Old one.
-- Generalization oftreatment of degenerated edges
-- gives a possibility to process them properly. Although there
-- are still some difficulties with processing faces in areas close
-- to degenerated edges.
-- Now the processing of arguments having internal sub-shapes gives
-- a correct result. Internal sub-shape means a sub-shape of a
-- shape with the orientation TopAbs_INTERNAL and is located
-- inside the shape boundaries. The New algorithm processes faces
-- with internal edges properly. The new API of the Boolean
-- Operations (in addition to the old API) allows to reuse the
-- already computed interference between arguments in different
-- types of Boolean Operations. It is possible to use once computed
-- interference in FUSE, CUT and COMMON operations on given
-- arguments. So there is no need to re-compute the interference
-- between the arguments. It allows to reduce time for more than one
-- operation on given arguments.
-- The shape type of a Boolean Operation result and types of the arguments:
-- - For arguments with the same shape type (e.g. SOLID /
-- SOLID) the type of the resulting shape will be a
-- COMPOUND, containing shapes of this type;
-- - For arguments with different shape types (e.g.
-- SHELL / SOLID) the type of the resulting shape will be a
-- COMPOUND, containing shapes of the type that is the same as
-- that of the low type of the argument. Example: For
-- SHELL/SOLID the result is a COMPOUND of SHELLs.
-- - For arguments with different shape types some of
-- Boolean Operations can not be done using the default
-- implementation, because of a non-manifold type of the
-- result. Example: the FUSE operation for SHELL and SOLID
-- can not be done, but the CUT operation can be done, where
-- SHELL is the object and SOLID is the tool.
-- It is possible to perform Boolean Operations on arguments
-- of the COMPOUND shape type. In this case each compound must not
-- be heterogeneous, i.e. it must contain equidimensional shapes
-- (EDGEs or/and WIREs, FACEs or/and SHELLs, SOLIDs). SOLIDs
-- inside the COMPOUND must not contact (intersect or touch)
-- each other. The same condition is true for SHELLs or FACEs,
-- WIREs or EDGEs.
-- It does not support Boolean Operations for COMPSOLID type of shape.
uses
TopTools,
TopoDS,
gp,
Geom,
Geom2d,
BOP,
BOPTools,
BRepBuilderAPI
is
deferred class BooleanOperation;
---Purpose: Root class for boolean operations.
class Fuse;
---Purpose: Perform the boolean operation FUSE.
---
class Common;
---Purpose: Perform the boolean operation COMMON.
---
class Cut;
---Purpose: Perform the boolean operation CUT.
---
class Section;
---Purpose: Perform the operation SECTION.
---
end BRepAlgoAPI;
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