Part Magic

Already talked about:

What a part is in "scene.html"
Accessing properties & members of a part, in expressions
Adding methods and types to a part in methods
Parts as resources ...

Now we need to talk about 2-way binding, part selection via matchers, ...

<<<<<<<<<<<<<<< OLD STUFF >>>>>>>>>>>>>>>>>>>

Nearly every element in a 3-D scene is (deep down inside) a Part, simply because such elements are pieces within a larger hierarchical structure (the scene). In addition to the hierarchical structure, each Part offers up the following information about itself:

Attributes, as a Dict, including its name and parent.
Sub-parts, as an ordered List.
Unique methods which can act on the part, beyond those provided by its type
Mixin types??, offering additional methods which can act on the part

sun = Lightbulb[
	name: 'Sun'
	parent: $
	pos: Xyz[0,0,0]
	color: Rgba[1,1,1]
	on:> 
		#turn it on

Attributes

Subparts

Methods

Mixins

Part selection patterns

Any part can be queried for a part within it. .select() returns List of all that match the pattern. A special pre-parsed Sel"...." pattern: An element can be

They can be within statement sequences, separated by ;. A separator of .. is allowed to match spaced matches>

They can be within parent sequences, separated by '/'. A separator of .. is allowed here as well.