Advanced Surface Approximation Dialog (NURBS)

This dialog sets parameters that control the tessellation used in the Spatial, Curvature, and Spatial and Curvature approximation methods.

• Modify panel > Select a NURBS surface object or surface sub-object. > Surface Approximation rollout > Tessellation Method group box > Turn off Lock To Top Level. > Advanced Parameters button
• Select an editable mesh object. > Modify panel > Surface Properties rollout > Advanced Parameters button

Interface

Subdivision Style

Chooses the method used to subdivide the surface:

• Grid Subdivides the surface using a regular grid.
• Tree (The default.) Subdivides the surface using a binary tree.

  For Grid or Tree subdivisions, the subdivision levels control the number of recursive decompositions that are performed during tessellation.

  Minimum Subdivision Levels Sets the minimum number of recursions. Default=0.

  Maximum Subdivision Levels Sets the maximum number of recursions. The maximum can be no greater than 7. Be careful: setting the maximum greater than 5 can result in massive face counts and poor performance. Default=3.

• Delaunay Subdivides the surface using nearly equilateral triangles.
  

  Delauney surface subdivision style

  Maximum Number of Triangles For Delaunay subdivision, the Maximum Number Of Triangles lets you specify the maximum number of triangles into which the surface will be divided. Default=20000.