About the Tessellation Segmentation Scope

Tessellation Segmentation aims at rebuilding a BRep from a mono-cell tessellation mesh (that is, a visualization or procedural mesh), that represents a mechanical shape with canonical shapes such as planes, cylinders, cones, spheres, tori, and few free shapes.

Tessellation Segmentation proposes two modes:

• Automatic
• Manual (when only a partial reconstruction is required), where you process well-defined areas as shown below.
  
  
  
  
  
  

As the quality of the generated BRep depends directly on the quality and precision of the input tessellation, verify that:

• The tessellation is a tessellated mesh, not a digit mesh:
  • This tessellated mesh is valid
    
    
  • This digit mesh is not valid
    
    
• The tessellation is the output of a CAD modeling, relying on a parametric definition:
  • This tessellation is valid
    
    
  • This tessellation is not valid
    
    
• The chord error of the tessellation must be small enough for the tessellation to be true to the part, especially in the connection areas, or in areas with a small radius.
  • This tessellation is valid
    
    
  • This tessellation is not valid
    
    
• There are no free edges: further edition in Natural Shape requires that you generate a solid. Although the absence of free edges does not guarantee a solid can be generated (the quality and precision of the tessellation have a major impact on this capability), it is a condition to generate one.
• The tessellation is clean (without non-manifold elements, duplicated triangles, corrupted triangles, too thin triangles,...). A thorough control of the tessellation quality is required.