HTessellationSettings Class Reference

#include <HIOUtilityExchange.h>

Public Types

enum  HTessellationLOD {
  TessLODExtraLow, TessLODLow, TessLODMedium, TessLODHigh,
  TessLODExtraHigh, TessLODUserDefined, TessLODControlledPrecision
}
 

Public Attributes

bool m_bAccurateTessellation
 
bool m_bAccurateTessellationWithGrid
 
bool m_bDoNotComputeNormalsInAccurateTessellation
 
bool m_bKeepUVPoints
 
bool m_bUseHeightInsteadOfRatio
 
double m_dAccurateTessellationWithGridMaximumStitchLength
 
double m_dAngleToleranceDeg
 
double m_dChordHeightRatio
 
double m_dMaxChordHeight
 
double m_dMaximalTriangleEdgeLength
 
double m_dMinimalTriangleAngleDeg
 
HTessellationLOD m_TessLod
 

Detailed Description

Specifies the settings of tessellation in Import.

Member Enumeration Documentation

◆ HTessellationLOD

Enumerator
TessLODExtraLow 

Extra Low level: when selected, these members are automatically defined with the following values: ChordHeightRatio = 50, AngleToleranceDeg = 40.

TessLODLow 

Low level: when selected, these members are automatically defined with the following values: ChordHeightRatio = 600, AngleToleranceDeg = 40.

TessLODMedium 

Medium level: when selected, these members are automatically defined with the following values: ChordHeightRatio = 2000, AngleToleranceDeg = 40.

TessLODHigh 

High level: when selected, these members are automatically defined with the following values: ChordHeightRatio = 5000, AngleToleranceDeg = 30.

TessLODExtraHigh 

Extra High level: when selected, these members are automatically defined with the following values: ChordHeightRatio = 10000, AngleToleranceDeg = 20.

TessLODUserDefined 

User Defined level: when selected, these members should be defined: m_dChordHeightRatio if m_bUseHeightInsteadOfRatio is set to false, m_dMaxChordHeight if m_bUseHeightInsteadOfRatio is set to true, m_dAngleToleranceDeg. Be very careful when using m_dMaxChordHeight because a too small value would generate a huge tessellation.

TessLODControlledPrecision 

Controlled Precision level: when selected, these members should be defined: m_dAngleToleranceDeg, m_dMaxChordHeight, m_dMinimalTriangleAngleDeg.

Deprecated:
This is a deprecated feature.

Member Data Documentation

◆ m_bAccurateTessellation

bool HTessellationSettings::m_bAccurateTessellation

Accurate tessellation. Uses standard parameters. 'false' indicates the tessellation is set for visualization. Setting this value to 'true' will generate tessellation more suited for analysis. Can be used with all TessellationLevelOfDetails.

◆ m_bAccurateTessellationWithGrid

bool HTessellationSettings::m_bAccurateTessellationWithGrid

Enable accurate tessellation with faces inner points on a grid.

◆ m_bDoNotComputeNormalsInAccurateTessellation

bool HTessellationSettings::m_bDoNotComputeNormalsInAccurateTessellation

Do not compute surface normals in accurate tessellation.

◆ m_bKeepUVPoints

bool HTessellationSettings::m_bKeepUVPoints

Keep parametric points as texture points.

◆ m_bUseHeightInsteadOfRatio

bool HTessellationSettings::m_bUseHeightInsteadOfRatio

Use m_dMaxChordHeight instead of m_dChordHeightRatio if m_eTessellationLevelOfDetail = kA3DTessLODUserDefined.

◆ m_dAccurateTessellationWithGridMaximumStitchLength

double HTessellationSettings::m_dAccurateTessellationWithGridMaximumStitchLength

Maximal grid stitch length. Disabled if value is 0. Be careful, a too small value can generate a huge tessellation.

◆ m_dAngleToleranceDeg

double HTessellationSettings::m_dAngleToleranceDeg

Specifies the maximum angle between two contiguous tessellation segments describing the curve of a topological edge for every face.

During tessellation, the curve describing the edge of a topological face will be approximated using straight line segments. m_dAngleToleranceDeg is the maximum angle between two consecutive segments.

Allowable values range from 10 to 40. Lower values will result in greater accuracy.

◆ m_dChordHeightRatio

double HTessellationSettings::m_dChordHeightRatio

Specifies the ratio of the diagonal length of the bounding box to the chord height. A value of 50 means that the diagonal of the bounding box is 50 times greater than the chord height. Values can range from 50 to 10,000. Higher values will generate more accurate tessellation.

◆ m_dMaxChordHeight

double HTessellationSettings::m_dMaxChordHeight

Specifies the maximum distance between the original geometric surface specified in the CAD file and the resulting tessellation. Be careful, very small values can generate very large tessellation files.

Conversely, very large values can generate inaccurate tessellation. In such cases, it may be better to use the m_dChordHeightRatio member to scale this value relative to the object that's being tessellated.

Note
m_dMaxChordHeight is ignored if m_bUseHeightInsteadOfRatio isn't set to true.

◆ m_dMaximalTriangleEdgeLength

double HTessellationSettings::m_dMaximalTriangleEdgeLength

Maximal length of the edges of triangles. Disabled if value is 0. Be careful, a too small value can generate a huge tessellation.

◆ m_dMinimalTriangleAngleDeg

double HTessellationSettings::m_dMinimalTriangleAngleDeg

Specifies the angle between two contiguous segments of wire edges for every face. Allowable values range from 10 through 30.

Deprecated:
This is a deprecated feature.

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