This class implements simple translation, scaling and rotation for points, as well as inverse transformations. These transformations are used in TransformMorphs (clipping scrollers) and TransformationMorphs (general flex-morph wrappers) to map, eg, global mouse coords into local coords, and to invert, eg, local damage rectangles into global damage rectangles.

	composing
	composedWithLocal:

	converting
	asMatrixTransform2x3 asMorphicTransform

	encoding
	encodeForRemoteCanvas

	initialize
	setIdentiy

	printing
	printOn:

	private
	setAngle: setOffset: setOffset:angle:scale: setScale:

	testing
	isIdentity isMorphicTransform isPureTranslation

	transformations
	composedWith: invert: invertBoundsRect: invertRect: transform: transformBoundsRect:

	transforming points
	globalPointToLocal: localPointToGlobal:

	accessing	top
	angle
	inverseTransformation Return the inverse transformation of the receiver
	offset
	scale
	withAngle: Return a copy of me with a different Angle
	withOffset: Return a copy of me with a different Offset
	withScale: Return a copy of me with a different Scale

	composing	top
	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
	asMorphicTransform

	encoding	top
	encodeForRemoteCanvas encode this transform into a string for use by a RemoteCanvas

	initialize	top
	setIdentiy

	printing	top
	printOn: Append to the argument, aStream, a sequence of characters that identifies the receiver.

	private	top
	setAngle:
	setOffset:
	setOffset:angle:scale:
	setScale:

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

	transformations	top
	composedWith: Return a new transform that has the effect of transforming points first by the receiver and then by the argument.
	invert: Transform the given point from local to global coordinates.
	invertBoundsRect: Return a rectangle whose coordinates have been transformed from local back to global coordinates. NOTE: if the transformation is not just a translation, then it will compute the bounding box in global coordinates.
	invertRect:
	transform: Transform the given point from global to local coordinates.
	transformBoundsRect: Return a rectangle whose coordinates have been transformed from global to local coordinates. NOTE: if the transformation is not just a translation, then it will compute the bounding box in global coordinates.

	transforming points	top
	globalPointToLocal: Transform aPoint from global coordinates into local coordinates
	localPointToGlobal: Transform aPoint from global coordinates into local coordinates

	instance creation	top
	fromRemoteCanvasEncoding: DisplayTransform fromRemoteCanvasEncoding: 'Morphic,-88,-128,1.345165663873898,0.1352584843149221'
	identity
	new Answer a new instance of the receiver (which is a class) with no indexable variables. Fail if the class is indexable.
	offset:
	offset:angle:scale: