README.OpenCascade

		    Build CGM on Opencascade 6.5.3

•	Please download Opencascade6.5 source package at
	http://www.opencascade.org/getocc/download/loadocc/

•	Then follow the link instruction to build OCC libraries.
	http://trac.mcs.anl.gov/projects/ITAPS/wiki/BuildingOcc65

• 	Download CGM trunk files, then under trunk do 
	•	autoreconf -fi
        •       ./configure --with-occ=(your occ dir, parent dir of ros) --prefix=Your install dir.
        •	make or make install
	•  	make check to see some examples of the testcases running.

                    CGM on OCC6.5 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.
        Added scale with 3 different scale factors in 3 axes.

•	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.

•	Get facets info for surfaces and curves.


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.

•	Copy body.

•	Boolean operations: subtract, unite, intersect.

•	Project curve on surface

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

•	Make thick body by hollowing existing solid.

•	Fillet and Chamber creation.
 
•	tweak-move surfaces and curves.

•	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.

•	Chop, cuts body by body, returns outside body, intersect body and leftover body.

•	webcut, three point cutting surface, body cutting tool, mid-plane cutting tool.