Power SubD-NURBS Overview
The combination of MODO and the Power SubD-NURBS Plug-in offers new conceptual modeling opportunities for designers in the automotive, aerospace, architectural, and consumer product goods industries.
Power SubD-NURBS was developed for Luxology by IntegrityWare, located in San Diego, CA. It bridges the gap between Subdivision Surface modeling and NURBS modeling, unifying free-form conceptual design with NURBS-based operations like filleting and blending. The Plug-in is available for MODO 601 (32 and 64-bit) and MODO 701 (64-bit) for use on Windows and for Mac OS X.
Power SubD-NURBS Settings
Power SubD-NURBS provides the ability to convert your Sub-D meshes into high quality NURBS surfaces with the following controls and workflow:
Polygonal vs. SubD Faces— The Plug-in can perform two types of exports: either “one-to-one” where each face of the mesh becomes a single planar face in the CAD format, or “smooth” where subdivided faces of the mesh will be combined to define curved NURBS surfaces. Typically the one-to-one export will have many small, sharp edges while the smooth export will generate large, primarily G2 continuous surfaces.
The export accomplishes this by treating each face of the mesh as either polygonal or as a Subdivision Surface based on how the mesh is currently displayed in MODO. It uses the displayed state as a tag for how each face should be processed.
“Power SubD-NURBS for MODO brings my workflow to the next level. I can now combine the freedom of surface subdivision modeling with the superior accuracy of NURBS technology – the best of the two worlds!”
– Pascal Beeckmans
Edge Detection Angle–The Plug-in uses this angle when determining the surface breakdown of the CAD data. The default value, 145.0 degrees, is usually optimal for organic meshes. In cases where there are weighted edges or fairly sharp angles, the value can be lowered.
Enable Crease Edges–Checking this setting will prevent the Plug-in from trying to smoothly blend the continuity of surfaces that meet at sharp angles. The images below are the export results without and with this setting enabled.
Triangulate Invalid Quads–This setting can improve the results when the mesh contains quads with very extreme angles between edges.
MODO materials–The Plug-in uses MODO materials as part of the criteria for determining the final surface breakdown in order to guarantee that there will be an edge along the boundary between different materials. This feature can be used to force specific edges to be generated for your desired CAD format where the Plug-in would have otherwise determined edges to be unnecessary.
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