Class Ifc4::IfcRationalBSplineSurfaceWithKnots

Nested Relationships

This class is a nested type of Struct Ifc4.

Inheritance Relationships

Base Type

Class Documentation

class Ifc4::IfcRationalBSplineSurfaceWithKnots : public Ifc4::IfcBSplineSurfaceWithKnots

A rational B-spline surface with knots is a piecewise parametric rational surface described in terms of control points, and associated weight values.

The surface is to be interpreted as follows:

σ

NOTE: The IfcRationalBSplineSurfaceWithKnots is an entity that had been adopted from ISO 10303, Industrial automation systems and integration — Product data representation and exchange, Part 42: Integrated generic resource: Geometric and topological representation.

NOTE: The specific subtype IfcRationalBSplineSurfaceWithKnots has been introduced to avoid the complexity of ANDOR subtype relationships in the ISO 10303-42 specification

NOTE: Corresponding ISO 10303 entity: rational_b_spline_surface. Please refer to ISO/IS 10303-42:1994, p. 85 for the final definition of the formal standard.

HISTORY: New entity in IFC2x4.

Public Types

typedef IfcTemplatedEntityList<IfcRationalBSplineSurfaceWithKnots> list

Public Functions

std::vector<std::vector<double>> WeightsData() const

The weights associated with the control points in the rational case.

void setWeightsData(std::vector<std::vector<double>> v)
const IfcParse::entity &declaration() const
IfcRationalBSplineSurfaceWithKnots(IfcEntityInstanceData *e)
IfcRationalBSplineSurfaceWithKnots(int v1_UDegree, int v2_VDegree, IfcTemplatedEntityListList<::Ifc4::IfcCartesianPoint>::ptr v3_ControlPointsList, ::Ifc4::IfcBSplineSurfaceForm::Value v4_SurfaceForm, bool v5_UClosed, bool v6_VClosed, bool v7_SelfIntersect, std::vector<int> v8_UMultiplicities, std::vector<int> v9_VMultiplicities, std::vector<double> v10_UKnots, std::vector<double> v11_VKnots, ::Ifc4::IfcKnotType::Value v12_KnotSpec, std::vector<std::vector<double>> v13_WeightsData)

Public Static Functions

const IfcParse::entity &Class()