Unimplemented functionality
	- tesselation and callbacks
	- trimming
	- setting NURBS properties (-> sampling etc.)
Differences from C++ source
	- no pooling
	- pointers to arrays are replaced by CArrayOf... classes and their methods
Unimplemented or incomplete "calltree top" methods (according to glu.def in Mesa 6.5)
	gluBeginTrim
	gluDeleteNurbsRenderer - won't be needed
	gluEndTrim
	gluGetNurbsProperty
	gluLoadSamplingMatrices
	gluNurbsCallback
	gluNurbsCallbackData
	gluNurbsCallbackDataEXT
	gluNurbsCurve - TODO type switch
	gluNurbsProperty
	gluPwlCurve
	gluQuadricCallback - not a NURBS method
As of files
	- Arc[ST]dirSorter.java - unimplemented (part of tesselation)
	- Backend.java:194 - wireframe quads - part of tesselation/callback
	- Curve.java:141-204 - culling
	- DisplayList.java:57 - append to DL - not sure whether it will be needed
	- GLUnurbs.java	:443,484 - error values
			:445 - trimming
			:512 - error handling (callback)
			:530 - loadGLmatrices
			:786 - nuid - nurbs object id - won't be needed I think
			:803 - end trim
	- GLUwNURBS.java:68,176 - NUBRS properties
	- Knotspec.java	:371 - copying in general case (more than 4 coords)
			:517 - copying with more than 4 coords
			:556 - pt_oo_sum default
	- Knotvector.java:165 - show method (probably debugging)
	- Mapdesc.java	:354 - get property
			:435 - xFormMat - change param cp to CArrayOfFloats; probably sampling functionality
	- Maplist.java:68 - clear ?
	- OpenGLCurveEvaluator.java	:132 - tess./callback code
					:168 - mapgrid1f
					:190 - tess./callback code (output triangles)
	- OpenGLSurfaceEvaluator.java	:77 . tess./callback code
					:81 - glGetIntegerValue
					:114 - tess./callback code
					:117 - Level of detail
					:144,161,201 - tess./callback code - output triangles
	- Patch.java:55 - constructor stuff ?
	- Patchlist.java:55 - constructor stuff ?
			:97 - cull check
			:105 - step size
			:115 - need of sampling subdivision
			:126 - need of subdivision
			:137 - need of non sampling subd.
			:146 - bbox (??)
	-Quilt.java	:254 - culling
			:282 - rates
	-Subdivider.java - all TODOs - it's stuff about trimming probably
			 :545 - jumpbuffer - not sure purpose it exactly served in original source
