Use this DXF troubleshooter to resolve zero volume issues and prepare DXFs for accurate weight calculation. Learn how to export 3DFACE/POLYFACE, set units to mm, and convert 2D lines into meshes for reliable extrusion weight per foot estimates.
Parses entities and reconstructs 2D closed loops from lines/arcs/circles/polylines when possible.
Signed area uses the shoelace formula: CCW is positive, CW is negative. Absolute area is the magnitude. For LWPOLYLINE/POLYLINE, a closed loop is indicated by group code 70 bit 1 (value 1). When flags are absent, endpoint coincidence within a small tolerance implies closure.