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PolyCAD

Imports Polyline and Facet information saved in Open Inventor IV file format.

Supported Entities Import Export
Arc    
Box    
BSpline Curve    
BSpline Surface    
BSpline Suface List    
Circle    
Cubic Spline    
Frames    
Groups    
Image Plane    
IntelliCurve    
IntelliHull    
Interpolating Cubic BSpline    
Mesh    
Point Cloud    
Polygon List Yes  
Polyline Yes  
Polyline List    
ShipLINES    
X-Topology Curves    
X-Topology Surface    
YachtLINES