point = Geometry::Point[3,4]    # 2D Point at coordinate 3, 4

# Copy constructors
point2 = Geometry::Point[point]
point2 = Geometry::Point[Vector[5,6]]

# Accessors
point.x
point.y
point[2]	# Same as point.z

# Zero
PointZero.new   # A Point full of zeros of unspecified length
Point.zero      # Another way to do the same thing
Point.zero(3)   # => Point[0,0,0]

# Two-point constructors
line = Geometry::Line[[0,0], [10,10]]
line = Geometry::Line[Geometry::Point[0,0], Geometry::Point[10,10]]
line = Geometry::Line[Vector[0,0], Vector[10,10]]

# Slope-intercept constructors
Geometry::Line[Rational(3,4), 5]	# Slope = 3/4, Intercept = 5
Geometry::Line[0.75, 5]

# Point-slope constructors
Geometry::Line(Geometry::Point[0,0], 0.75)
Geometry::Line(Vector[0,0], Rational(3,4))

# Special constructors (2D only)
Geometry::Line.horizontal(y=0)
Geometry::Line.vertical(x=0)

# A Rectangle made from two corner points
Geometry::Rectangle.new [1,2], [2,3]
Geometry::Rectangle.new from:[1,2], to:[2,3]

Geometry::Rectangle.new center:[1,2], size:[1,1]	# Using a center point and a size
Geometry::Rectangle.new origin:[1,2], size:[1,1]	# Using an origin point and a size

# A Rectangle with its origin at [0, 0] and a size of [10, 20]
Geometry::Rectangle.new size: [10, 20]
Geometry::Rectangle.new size: Size[10, 20]
Geometry::Rectangle.new width: 10, height: 20

# A circle at Point[1,2] with a radius of 3
circle = Geometry::Circle.new center:[1,2], radius:3

# A polygon that looks a lot like a square
polygon = Geometry::Polygon.new [0,0], [1,0], [1,1], [0,1]

# Everyone loves a good hexagon
hexagon = Geometry::RegularPolygon.new 6, :diameter => 3

# For when you know you need a zero, but you don't know how big it should be
zero = Point.zero       # Returns a Point of indeterminate length that always compares equal to zero

# Oh, you wanted ones instead? No problem.
ones = Point.one        # => Point[1,1,1...1]

# Looking for something more exotic that a mere 1?
iso = Point.iso(5)      # => Point[5,5,5...5]