Faceter page

The Faceter page is provided to specify default values for faceting surface patches (for graphical rendering, property calculations, etc). The levels are:

• Low - Low accuracy, but fast.

• Recommended - This provides the best accuracy/speed trade-off.

• High - High accuracy, but can be slow for complex designs

• Custom - Individual faceter values can be set. These are

  • Min Subdivision Level (>=0) and Max Subdivision Level (>=0) - Specify to what extent the basic faceting grid may be subdivided.

  • Surface Tolerance (>0) - The gap between an approximating facet and the true mathematical surface. This value is entered in meters.

  • Normal Tolerance (>=0) - Defines the maximum angle between the surface normals at the vertices of an individual facet. THis is the most sensitive (and thus generally the governing) parameter and should be used with care to avoid the generation of excessive numbers of facets. For most of the models values in range of 10-30 are sufficient.

  • Aspect Ratio (>=1) - Controls triangular facets, ensuring the ratio of height over base width does not exceed the value entered.

  • No. of Increments (>=4, <=30) - The number of subdivisions for a NURBS surface if fixed-grid faceting is used.