I am the abstract superclass of the Graphic spatial primitives. I represent an ordered sequence of Points. Spatial primitives are used to generate "trajectories" such as lines and circles.

	adding
	add:

	display box access
	computeBoundingBox

	displaying
	displayOn:at:clippingBox:rule:fillColor: displayOn:transformation:clippingBox:rule:fillColor:

	enumerating
	collect: select:

	private
	initializeCollectionOfPoints initializeCollectionOfPoints:

	removing
	removeAllSuchThat:

	testing
	isEmpty

	transforming
	scaleBy: translateBy:

	instance creation
	new new:

	accessing	top
	at: Answer the point on the receiver's path at position index.
	at:put: Store the argument, aPoint, as the point on the receiver's path at position index.
	first Answer the first point on the receiver's path; included to correspond to OrderedCollection protocol.
	firstPoint Answer the first point on the receiver's path.
	firstPoint: Replace the first element of the receiver with the new value aPoint. Answer the argument aPoint.
	form Answer the receiver's form, or, if form is nil, then answer a 1 x 1 black form (a black dot).
	form: Make the argument, aForm, be the receiver's form.
	last Answer the last point on the receiver's path; included to correspond to OrderedCollection protocol.
	offset There are basically two kinds of display objects in the system: those that, when asked to transform themselves, create a new object; and those that side effect themselves by maintaining a record of the transformation request (typically an offset). Path, like Rectangle and Point, is a display object of the first kind.
	secondPoint Answer the second element of the receiver.
	secondPoint: Replace the second element of the receiver with the new value aPoint. Answer the argument aPoint.
	size Answer the length of the receiver.
	thirdPoint Answer the third element of the receiver.
	thirdPoint: Replace the third element of the receiver with the new value aPoint. Answer the argument aPoint.

	adding	top
	add: Include aPoint as one of the receiver's elements.

	display box access	top
	computeBoundingBox Refer to the comment in DisplayObject|computeBoundingBox.

	displaying	top
	displayOn:at:clippingBox:rule:fillColor: Display this Path--offset by aPoint, clipped by clipRect and the form associated with this Path will be displayedr according to one of the sixteen functions of two logical variables (rule). Also the source form will be first anded with aForm as a mask. Does not effect the state of the Path
	displayOn:transformation:clippingBox:rule:fillColor: Displays this path, translated and scaled by aTransformation. Get the scaled and translated Path.

	enumerating	top
	collect: Evaluate aBlock with each of the receiver's elements as the argument. Collect the resulting values into a path that is like the receiver. Answer the new path.
	select: Evaluate aBlock with each of the receiver's elements as the argument. Collect into a new path like the receiver only those elements for which aBlock evaluates to true. Answer the new path.

	private	top
	initializeCollectionOfPoints
	initializeCollectionOfPoints:

	removing	top
	removeAllSuchThat: Evaluate aBlock for each element of the receiver. Remove each element for which aBlock evaluates to true.

	testing	top
	isEmpty

	transforming	top
	scaleBy: Answers a new Path scaled by aPoint. Does not affect the current data in this Path.
	translateBy: Answers a new Path whose elements are translated by aPoint. Does not affect the elements of this Path.

	examples	top
	example Creates a Path from mousePoints and displays it several ways on the display screen. Messes up the display. For learning about class Path, just select the code below and execute it to create a path and see it redisplayed in another place on the screen. Each path displays using a different form. A path is indicated by pressing the red mouse button in a sequence; press any other mouse button to terminate.

	instance creation	top
	new Answer a new instance of the receiver (which is a class) with no indexable variables. Fail if the class is indexable.
	new: Answer an instance of this class with the number of indexable variables specified by the argument, sizeRequested.