Break line (Feature line) and sharp edge reconstruction

The software provides tools to compute polylines following sharp edges, fillets or small radii on a mesh.

It is good to know that the curvature of a mesh can be negative or positive:

• A negative curvature has its center inside the mesh; the shape is convex.

• A positive curvature has its center outside the mesh; the shape is concave.

Three types of lines can be extracted from a mesh:

• The single Break line is the line on the sharp edge.

• The fictive line is the line which can be used to recreate the sharp edge (i.e. planar intersection line).

• Exercise: Extract a feature line or a break line from a mesh

• Exercise: Rebuild a sharp edge using a feature line