root/cgm/trunk/README.OpenCascade

                    GM on OCC6.3 capabilities

1.      Query

•     Import/Export OpenCascade  b-rep files, create CGM geometry/topology entities.

•     Import/Export OpenCascade b-rep plus CGM attribute files.

•     Delete entities build on OCC engine.

•     Translate/Rotate/Scale/Reflect objects.

•     Detect body overlap

•     Get iso-parametric points on surfaces and curves.

•     Get curve-curve, curve-surface intersection points.

•     Get distance between entities.

•     Get bounding boxes for entities.

2.      Modify

•     Create CGM geometry entities using OpenCascade engine. Top-Down method: directly create points, curves, surfaces or solid primitives.

•     Create CGM geometry entities using OpenCascade engine, Bottom-Up method: curve generates by points, surface generates by curves and solid generates by surfaces.

•     Boolean operations: subtract, unite, intersect.

•     Project curve on surface

•     Imprint object: body-body imprint, surface-body imprint, curve-surface imprint.

•     Make thick body by hollowing existing solid.

•     Sweep surface or curve along a vector, an edge, perpendicularly or revolutionarily.(alpha testing)

•       Section, cuts in half. To see a cross section of the model.