No comment. Sorry.

	composing
	composedWith: composedWithGlobal: composedWithLocal:

	converting
	asMatrixTransform2x3

	initialize
	setIdentity

	testing
	isIdentity isPureTranslation

	transforming points
	globalPointToLocal: globalPointsToLocal: invertBoundsRect: localPointToGlobal: localPointsToGlobal:

	transforming rects
	globalBoundsToLocal: localBoundsToGlobal: sourceQuadFor:

	instance creation
	new

	accessing	top
	angle
	inverseTransformation Return the inverse transformation of the receiver
	offset

	composing	top
	composedWith:
	composedWithGlobal: Return the composition of the receiver and the global transformation passed in. A 'global' transformation is defined as a transformation that takes place between the receiver (the 'local') transformation and any 'global' point computations, e.g., for the methods globalPointToLocal: globalPoint globalPoint -> globalTransform -> localTransform -> locaPoint localPointToGlobal: localPoint localPoint -> localTransform -> globalTransform -> globalPoint
	composedWithLocal: Return the composition of the receiver and the local transformation passed in. A 'local' transformation is defined as a transformation that takes place between the receiver (the 'global') transformation and any 'local' point computations, e.g., for the methods globalPointToLocal: globalPoint globalPoint -> globalTransform -> localTransform -> locaPoint localPointToGlobal: localPoint localPoint -> localTransform -> globalTransform -> globalPoint

	converting	top
	asMatrixTransform2x3 Represent the receiver as a 2x3 matrix transformation

	initialize	top
	setIdentity I *am* the identity transform

	testing	top
	isIdentity Return true if the receiver is the identity transform; that is, if applying to a point returns the point itself.
	isPureTranslation Return true if the receiver specifies no rotation or scaling.

	transforming points	top
	globalPointToLocal: Transform aPoint from global coordinates into local coordinates
	globalPointsToLocal: Transform all the points of inArray from global into local coordinates
	invertBoundsRect: Return a rectangle whose coordinates have been transformed from local back to global coordinates. Since I am the identity matrix no transformation is made.
	localPointToGlobal: Transform aPoint from local coordinates into global coordinates
	localPointsToGlobal: Transform all the points of inArray from local into global coordinates

	transforming rects	top
	globalBoundsToLocal: Transform aRectangle from global coordinates into local coordinates
	localBoundsToGlobal: Transform aRectangle from local coordinates into global coordinates
	sourceQuadFor:

	class initialization	top
	initialize IdentityTransform initialize

	instance creation	top
	new There can be only one