An advanced B-rep is a boundary representation model in which all faces, edges and vertices are explicitly represented. It is a solid with explicit topology and elementary or free-form geometry. The faces of the B-rep are of type IfcAdvancedFace. An advanced B-rep has to meet the same topological constraints as the manifold solid B-rep. (Definition from ISO/CD 16739:2011) More...

#include <AdvancedBrep.h>

Inheritance diagram for OpenLxApp::AdvancedBrep:

Public Member Functions
	~AdvancedBrep (void)

bool	setShape (pShape aShape)

Public Member Functions inherited from OpenLxApp::Geometry
virtual	~Geometry (void)

pShape	computeShape (bool checkShape=false)

pConstShape	getShape (void) const

double	getPrecision () const

void	setPrecision (double p)

Geom::Bnd_Box	getBoundingBox () const

Public Member Functions inherited from OpenLxApp::DocObject
std::shared_ptr< Document >	getDocument () const

bool	isNew () const

bool	isUpdated () const

bool	isValid () const

bool	hasErrors () const

void	touch ()

LxIfc4::LxIfc4EntityEnum	getEntityType () const

std::string	getEntityTypeAsString () const

std::shared_ptr< Core::DbgInfo >	getDbgInfo () const

	DocObject (Core::DocObject *aObject)

virtual	~DocObject (void)

Core::DocObject *	__getObj__ () const

Additional Inherited Members
Protected Member Functions inherited from OpenLxApp::Geometry
	Geometry ()=default

Protected Member Functions inherited from OpenLxApp::DocObject
	DocObject ()

Protected Attributes inherited from OpenLxApp::DocObject
Core::DocObject *	_coreObj = nullptr

Detailed Description

An advanced B-rep is a boundary representation model in which all faces, edges and vertices are explicitly represented. It is a solid with explicit topology and elementary or free-form geometry. The faces of the B-rep are of type IfcAdvancedFace. An advanced B-rep has to meet the same topological constraints as the manifold solid B-rep. (Definition from ISO/CD 16739:2011)

Introduction

An AdvancedBrep is the generalized form of a FacetedBrep. Where the FacetedBrep has to be a polyhedron - in a mathematical sense - the AdvancedBrep "only" has to be a manifold. This means, it still has to be a closed body, but its faces and edges don't have to be planar or straight anymore.

In contrast to the FacetedBrep, you can't define an AdvancedBrep via setPoints() and setModel methods. To create an AdvancedBrep, you have to define its faces and merge them into a shape, which then forms the AdvancedBrep via the setShape method (similar to the first approach described in FacetedBrep).

Example

The following example will create a cylinder by creating each of the outer faces separately and then merging them into an advanced brep.

import OpenLxApp as lx
import Geom, Base, Topo
import math
 
app = lx.Application.getInstance()
doc = app.getActiveDocument()
 
# Create a base circle with radius 3.
ax2 = Geom.Ax2()
circle = Geom.Circ(ax2, 3)
 
# Create a list for 3 faces.
faceList = Topo.vector_Face(3)
# Create the bottom face by "cutting" a 360� (2pi in radians) arc of a circle.
bottomFaceEdge = Topo.EdgeTool.makeArcOfCircle(circle, 0, 2 * math.pi)
# Make a wire of the created circle-edge.
bottomFaceWire = Topo.WireTool.makeWire(bottomFaceEdge)
# Form a face of the wire.
bottomFace = Topo.FaceTool.makeFace(bottomFaceWire)
# Add it to the face list.
faceList[0] = bottomFace
 
# Create the outer face by cutting a 360� arc of a circle and extrude it.
outerFace = Topo.FaceTool.makeCylindricalFace(circle, 0, 2 * math.pi, 7)
# Add it to the face list.
faceList[1] = outerFace
 
# Shift the circlecenter by 7, to create the top face.
circle.setLocation(Geom.Pnt(0, 0, 7))
# Again, cut out a 360� arc of a circle.
topFaceEdge = Topo.EdgeTool.makeArcOfCircle(circle, 0, 2 * math.pi)
# Make it a wire.
topFaceWire = Topo.WireTool.makeWire(topFaceEdge)
# Create a face of the wire.
topFace = Topo.FaceTool.makeFace(topFaceWire)
# Add it to the face list.
faceList[2] = topFace
 
# Form a shape of the faces in the list.
shape = Topo.ShapeTool.makeShape(faceList)
 
# Create an advanced brep and define it via setShape.
advancedBrep = lx.AdvancedBrep.createIn(doc)
advancedBrep.setShape(shape)
 
# To draw the advanced brep, assign it to an Element and recompute the current document.
abElement = lx.Element.createIn(doc)
abElement.setDiffuseColor(Base.Color(32,192,0,255))
abElement.setGeometry(advancedBrep)
doc.recompute()

The result:

An AdvancedBrep.

See also: Documentation from IFC4: IfcAdvancedBrep

Constructor & Destructor Documentation

◆ ~AdvancedBrep()

OpenLxApp::AdvancedBrep::~AdvancedBrep ( void )

Member Function Documentation

◆ setShape()

bool OpenLxApp::AdvancedBrep::setShape ( pShape aShape )

The documentation for this class was generated from the following file:

D:/CadworkJobs/SoftwareProjekte/Lexocad/LexoGit/Lexocad/lexocad/OpenLxApp/include/OpenLxApp/AdvancedBrep.h

Public Member Functions