square waves, dovetails, etc

first_quadrant returns a new sketch translated such that it lies entirely in the first quadrant. If the sketch already does, then it returns self.

first_quadrant! is the same, but modifies self, as necessary.

first_quadrant? returns true if the sketch lies entirely in the first quadrant.

Add similar methods for the other quadrants.

move_x and move_y are turning out to be a bit cumbersome. The new methods should be syntactic sugar that wraps move_x and move_y.

A layer is like a group, but doesn't have a transformation or any sort of location at all.

For creating slots

'origin' specifies the lower-left corner of the repetition

Anything specified by the start_at command is added to the origin value

Or, at the very least, don't blow up when minmax is called on an empty Group.

Something strange is going on.

And that default should be PointZero(2)

Nothing fancy

Accepts grid spacing arguments and a block. Duplicates the block with a transformation for each grid point. If the block has arity==1, then pass it the x-coordinate for each grid point and group the resulting geometry by y-value. If the block has arity==2, then pass it x and y for each grid point and put all of the generated geometry in a single group.

Indicates how to handle off-axis positioning. For example, setting a horizontal layout's align property to :botton will cause all elements to be bottom-aligned.

Because that's what it actually does. Adding an origin argument is probably a good idea, but it should be the lower left corner of the repetition, instead of the center.

For generating a hexagon

Insets the layout by the given amount.
If a single value is given, inset both horizontally and vertically by the given value.

translate is an alias for group that sets up a pure translation Transformation (no rotations allowed)

That is, assuming MiniSpec can handle it, which looks doubtful at the moment.

And do some other tidying. Here's an article to help you remember: http://devblog.orgsync.com/maintaining-a-large-test-suite-a-dry-approach-to-rspec/

To be more like the step method arguments that were added in ruby 2.1

Otherwise the default has to be different depending on the :direction attribute. :center is easier and makes more sense. However, this requires :center alignment to be supported, and it currently isn't. Fix that.

square 10.cm, radius:1.cm would be a 10 cm square with 1 cm radiused corners

Useful for creating a new sketch using existing sketches as components