HLRAlgo Class Reference

In order to have the precision required in industrial design, drawings need to offer the possibility of removing lines, which are hidden in a given projection. To do this, the Hidden Line Removal component provides two algorithms: HLRBRep_Algo and HLRBRep_PolyAlgo. These algorithms remove or indicate lines hidden by surfaces. For a given projection, they calculate a set of lines characteristic of the object being represented. They are also used in conjunction with extraction utilities, which reconstruct a new, simplified shape from a selection of calculation results. This new shape is made up of edges, which represent the lines of the visualized shape in a plane. This plane is the projection plane. HLRBRep_Algo takes into account the shape itself. HLRBRep_PolyAlgo works with a polyhedral simplification of the shape. When you use HLRBRep_Algo, you obtain an exact result, whereas, when you use HLRBRep_PolyAlgo, you reduce computation time but obtain polygonal segments. More...

#include <HLRAlgo.hxx>

Static Public Member Functions
static void	UpdateMinMax (const double xx, const double yy, const double zz, double Min[16], double Max[16])
	Iterator on the visible or hidden parts of an EdgeStatus.
static void	EnlargeMinMax (const double tol, double Min[16], double Max[16])
static void	InitMinMax (const double Big, double Min[16], double Max[16])
static void	EncodeMinMax (HLRAlgo_EdgesBlock::MinMaxIndices &Min, HLRAlgo_EdgesBlock::MinMaxIndices &Max, HLRAlgo_EdgesBlock::MinMaxIndices &MinMax)
static double	SizeBox (HLRAlgo_EdgesBlock::MinMaxIndices &Min, HLRAlgo_EdgesBlock::MinMaxIndices &Max)
static void	DecodeMinMax (const HLRAlgo_EdgesBlock::MinMaxIndices &MinMax, HLRAlgo_EdgesBlock::MinMaxIndices &Min, HLRAlgo_EdgesBlock::MinMaxIndices &Max)
static void	CopyMinMax (HLRAlgo_EdgesBlock::MinMaxIndices &IMin, HLRAlgo_EdgesBlock::MinMaxIndices &IMax, HLRAlgo_EdgesBlock::MinMaxIndices &OMin, HLRAlgo_EdgesBlock::MinMaxIndices &OMax)
static void	AddMinMax (HLRAlgo_EdgesBlock::MinMaxIndices &IMin, HLRAlgo_EdgesBlock::MinMaxIndices &IMax, HLRAlgo_EdgesBlock::MinMaxIndices &OMin, HLRAlgo_EdgesBlock::MinMaxIndices &OMax)

Detailed Description

In order to have the precision required in industrial design, drawings need to offer the possibility of removing lines, which are hidden in a given projection. To do this, the Hidden Line Removal component provides two algorithms: HLRBRep_Algo and HLRBRep_PolyAlgo. These algorithms remove or indicate lines hidden by surfaces. For a given projection, they calculate a set of lines characteristic of the object being represented. They are also used in conjunction with extraction utilities, which reconstruct a new, simplified shape from a selection of calculation results. This new shape is made up of edges, which represent the lines of the visualized shape in a plane. This plane is the projection plane. HLRBRep_Algo takes into account the shape itself. HLRBRep_PolyAlgo works with a polyhedral simplification of the shape. When you use HLRBRep_Algo, you obtain an exact result, whereas, when you use HLRBRep_PolyAlgo, you reduce computation time but obtain polygonal segments.

Member Function Documentation

AddMinMax()

void HLRAlgo::AddMinMax ( HLRAlgo_EdgesBlock::MinMaxIndices & IMin, HLRAlgo_EdgesBlock::MinMaxIndices & IMax, HLRAlgo_EdgesBlock::MinMaxIndices & OMin, HLRAlgo_EdgesBlock::MinMaxIndices & OMax )

static

CopyMinMax()

void HLRAlgo::CopyMinMax ( HLRAlgo_EdgesBlock::MinMaxIndices & IMin, HLRAlgo_EdgesBlock::MinMaxIndices & IMax, HLRAlgo_EdgesBlock::MinMaxIndices & OMin, HLRAlgo_EdgesBlock::MinMaxIndices & OMax )

inlinestatic

DecodeMinMax()

void HLRAlgo::DecodeMinMax ( const HLRAlgo_EdgesBlock::MinMaxIndices & MinMax, HLRAlgo_EdgesBlock::MinMaxIndices & Min, HLRAlgo_EdgesBlock::MinMaxIndices & Max )

static

EncodeMinMax()

void HLRAlgo::EncodeMinMax ( HLRAlgo_EdgesBlock::MinMaxIndices & Min, HLRAlgo_EdgesBlock::MinMaxIndices & Max, HLRAlgo_EdgesBlock::MinMaxIndices & MinMax )

static

EnlargeMinMax()

void HLRAlgo::EnlargeMinMax ( const double tol, double Min[16], double Max[16] )

static

InitMinMax()

void HLRAlgo::InitMinMax ( const double Big, double Min[16], double Max[16] )

static

SizeBox()

double HLRAlgo::SizeBox ( HLRAlgo_EdgesBlock::MinMaxIndices & Min, HLRAlgo_EdgesBlock::MinMaxIndices & Max )

static

UpdateMinMax()

void HLRAlgo::UpdateMinMax ( const double x, const double y, const double z, double Min[16], double Max[16] )

static

Iterator on the visible or hidden parts of an EdgeStatus.

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

• HLRAlgo.hxx