Think of large cube surrounding us
inside cube = see
outside cube = can't see

Origin = center of cube..
move relative to that

think of solar system

world vs local coordinate system
	Pivot in maya

Building with #s
   incapable of being approximate or are they?

what is a model
surface shell
list of 3d coordinates
math eq. describing surface

Design model first: Planning
	references (photos art, research)
	sketch blueprints schematics, rough drawing
	traditionally used clay word metal plastic

to build our models, we have building blocks of
	lines and surfaces

most basic element is point:
	x y z location

edge:  2 adjacent surfaces  or line connecting two or more points

surface:  made of edges.. bounding box

object: several points, edges and surfaces
	accessed thru component editor

Surfaces & normals
	right handed coordinate system


Moving objects:
	Geometric transforms:
	translation
	scale
	rotation

Can transform
	object or group of objects
	camera
	lights	

think about car with tires:
order of operation
naming

absolute vs relative movements

Translations: along an axis

Rotation:  angle and direction (axis)
	+ or - rot = CW or CCW
	RH rule
	Thumb = direction
	finger = rotation angle (amount)

Scaling: proportional/uniform



Maya is node based system
	contains attributes
	nodes attributed to other nodes
	hypergraph

Grouping: 
	see group name/node
	selection modes: object component, now add group heirarchy
	Pivot of group

Parenting: 
	transformations apply to childern in heirarchy
	child inherits transforms of parent
	see diff between group & parent in hypergraph


Cameras:
	orthographic
	parallel
	faraway things are same size as closer elements
	useful for exact positioning

	perspective
	real world
	elements project onto a 2D plane, converge to a point

 Cameras in Maya:
	selection
	specify parameters
	EX: Change top to bottom
	Interactive
	look thru (panel)

	display -> show -> cameras
	display -> hide -> cameras 


Modeling w/ lines vs curves
	rendering 
	precision
	interactive 
	level of detail


Polygons 
	planar facets (regular & irregular)
	modeling with straight edges (line based)

vertices, faces, normals, edges
merge vertices, edges
custom display backface culling

See Bock's notes on Polygon Modeling I & II

edit polygons -> duplicate face
polygons -> tool options -> keep faces together

Edit Polygons -> Extrude
 
Edit Polygons -> duplicate face

Edit POlygons -> extract 

edit polygons -> wedge faces -> options





NURBS: modeling with curves:
organic: bodies, fruit, shapes

maya tools:  cv: control points 
	ep: points on curve

cubic is enough for curves
linear is line

See Bock's notes on Nurbs Surfaces & Nurbs modeling I 

revolve: around an axis
loft: connect together;  skins surface along series of profile curves
planar: fill in closed curve with surface
birail: sweep one or more profiles along path


Subdivisions surfaces: successive refinement; block modeling methodology


Other things:

object naming

template / show / unshow  / layers

snapping & align
	modify -> snap align objects ->

duplicate:
	geometry type: copy  or instance
	w/ offset

mirroring

Pig tutorial