A3DRWParamsExportStlData

struct A3DRWParamsExportStlData

A structure that specifies parameters used to write the model file to STL format.

Version

10.2

Public Members

A3DBool m_bBinaryFile

With a value of TRUE, compresses the STL file to reduce file size.

A3DETessellationLevelOfDetail m_eTessellationLevelOfDetail

Enum to specify predefined values for some following members.

A3DDouble 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.

A3DDouble m_dAngleToleranceDeg

Specifies the maximum angle between two contiguous segments of wire edges for every face.

The value must be from 10 through 40.

A3DDouble m_dMinimalTriangleAngleDeg

Specifies the angle between two contiguous segments of wire edges for every face.

Allowable values range from 10 through 30.

A3DDouble 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.

A3DBool 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.

A3DBool m_bAccurateTessellationWithGrid

Accurate tessellation with faces inner points on a grid.

A3DDouble m_dAccurateTessellationWithGridMaximumStitchLength

Maximal grid stitch length.

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

A3DBool m_bAccurateSurfaceCurvatures

Take into account surfaces curvature in accurate tessellation to controle triangles elongation directions.

Ignored if m_bAccurateTessellation isn’t set to true.

A3DBool m_bKeepCurrentTessellation

With a value of TRUE, keeps the current tessellation.

A3DBool m_bUseHeightInsteadOfRatio

Use m_dMaxChordHeight instead of m_dChordHeightRatio if m_eTessellationLevelOfDetail = kA3DTessLODUserDefined.

A3DDouble 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.

A3DEUnits m_eExportUnit

Unit of the exported model.

STL files have no unit however this value allow you to define it. This scales the model to match the target unit. Default value is set to kA3DUnitMillimeter. Setting to kA3DUnitUnknown keeps the original unit.